⛽: Use minimum to combine incoming gas values in per-context gas #1598
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michael-schwarz
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CHANGES: Functionally equivalent to Goblint in SV-COMP 2025. * Add 32bit vs 64bit architecture support (goblint/analyzer#54, goblint/analyzer#1574). * Add per-function context gas analysis (goblint/analyzer#1569, goblint/analyzer#1570, goblint/analyzer#1598). * Adapt automatic static loop unrolling (goblint/analyzer#1516, goblint/analyzer#1582, goblint/analyzer#1583, goblint/analyzer#1584, goblint/analyzer#1590, goblint/analyzer#1595, goblint/analyzer#1599). * Adapt automatic configuration tuning (goblint/analyzer#1450, goblint/analyzer#1612, goblint/analyzer#1181, goblint/analyzer#1604). * Simplify non-relational integer invariants in witnesses (goblint/analyzer#1517). * Fix excessive hash collisions (goblint/analyzer#1594, goblint/analyzer#1602). * Clean up various code (goblint/analyzer#1095, goblint/analyzer#1523, goblint/analyzer#1554, goblint/analyzer#1575, goblint/analyzer#1588, goblint/analyzer#1597, goblint/analyzer#1614).
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As observed by @jerhard for our extended version of the context paper, the gas (if tracked per
fundec) needs to be combined with the minimum operation as otherwise it can be replenished unboundedly in the case of several mutually recursive functions.This PR adds an example that was previously problematic, and fixes the issue.