./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 19:45:35,307 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 19:45:35,357 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 19:45:35,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 19:45:35,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 19:45:35,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 19:45:35,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 19:45:35,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 19:45:35,389 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 19:45:35,390 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 19:45:35,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 19:45:35,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 19:45:35,391 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 19:45:35,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 19:45:35,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 19:45:35,392 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:45:35,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 19:45:35,392 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2025-03-17 19:45:35,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 19:45:35,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 19:45:35,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 19:45:35,629 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 19:45:35,629 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 19:45:35,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-03-17 19:45:36,770 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a13764db0/e224fbf607864456ad7ba6c4b2a13b6d/FLAG244623ef9 [2025-03-17 19:45:36,999 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 19:45:37,001 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-03-17 19:45:37,012 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a13764db0/e224fbf607864456ad7ba6c4b2a13b6d/FLAG244623ef9 [2025-03-17 19:45:37,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a13764db0/e224fbf607864456ad7ba6c4b2a13b6d [2025-03-17 19:45:37,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 19:45:37,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 19:45:37,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 19:45:37,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 19:45:37,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 19:45:37,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,353 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17654bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37, skipping insertion in model container [2025-03-17 19:45:37,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,368 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 19:45:37,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:45:37,513 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 19:45:37,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:45:37,543 INFO L204 MainTranslator]: Completed translation [2025-03-17 19:45:37,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37 WrapperNode [2025-03-17 19:45:37,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 19:45:37,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 19:45:37,545 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 19:45:37,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 19:45:37,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,576 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 369 [2025-03-17 19:45:37,576 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 19:45:37,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 19:45:37,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 19:45:37,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 19:45:37,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,598 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 19:45:37,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,605 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,608 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,611 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 19:45:37,613 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 19:45:37,613 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 19:45:37,613 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 19:45:37,614 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (1/1) ... [2025-03-17 19:45:37,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:45:37,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:45:37,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 19:45:37,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 19:45:37,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 19:45:37,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 19:45:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 19:45:37,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 19:45:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 19:45:37,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 19:45:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 19:45:37,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 19:45:37,658 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 19:45:37,753 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 19:45:37,754 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 19:45:38,232 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 19:45:38,233 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 19:45:38,590 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 19:45:38,590 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 19:45:38,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:45:38 BoogieIcfgContainer [2025-03-17 19:45:38,591 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 19:45:38,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 19:45:38,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 19:45:38,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 19:45:38,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:45:37" (1/3) ... [2025-03-17 19:45:38,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e75f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:45:38, skipping insertion in model container [2025-03-17 19:45:38,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:37" (2/3) ... [2025-03-17 19:45:38,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e75f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:45:38, skipping insertion in model container [2025-03-17 19:45:38,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:45:38" (3/3) ... [2025-03-17 19:45:38,599 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2025-03-17 19:45:38,610 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 19:45:38,611 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series3.wvr.c that has 5 procedures, 82 locations, 1 initial locations, 7 loop locations, and 32 error locations. [2025-03-17 19:45:38,611 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 19:45:38,716 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 19:45:38,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 88 transitions, 204 flow [2025-03-17 19:45:38,789 INFO L124 PetriNetUnfolderBase]: 7/84 cut-off events. [2025-03-17 19:45:38,791 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 19:45:38,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 84 events. 7/84 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 273 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2025-03-17 19:45:38,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 88 transitions, 204 flow [2025-03-17 19:45:38,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 82 transitions, 185 flow [2025-03-17 19:45:38,806 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 19:45:38,815 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3deccfc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 19:45:38,816 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2025-03-17 19:45:38,820 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 19:45:38,820 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-03-17 19:45:38,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 19:45:38,820 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:38,820 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 19:45:38,821 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:38,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:38,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1077146, now seen corresponding path program 1 times [2025-03-17 19:45:38,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:38,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454001726] [2025-03-17 19:45:38,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:38,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 19:45:38,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 19:45:38,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:38,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:39,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:39,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454001726] [2025-03-17 19:45:39,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454001726] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:45:39,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:45:39,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:45:39,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255260315] [2025-03-17 19:45:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:45:39,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:45:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:39,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:45:39,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:45:39,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-03-17 19:45:39,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:39,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:39,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-03-17 19:45:39,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:45,142 INFO L124 PetriNetUnfolderBase]: 58876/77291 cut-off events. [2025-03-17 19:45:45,143 INFO L125 PetriNetUnfolderBase]: For 2060/2060 co-relation queries the response was YES. [2025-03-17 19:45:45,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156210 conditions, 77291 events. 58876/77291 cut-off events. For 2060/2060 co-relation queries the response was YES. Maximal size of possible extension queue 4800. Compared 516668 event pairs, 51710 based on Foata normal form. 3/42394 useless extension candidates. Maximal degree in co-relation 148242. Up to 76186 conditions per place. [2025-03-17 19:45:45,640 INFO L140 encePairwiseOnDemand]: 65/88 looper letters, 63 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2025-03-17 19:45:45,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 335 flow [2025-03-17 19:45:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:45:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:45:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2025-03-17 19:45:45,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2025-03-17 19:45:45,650 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 185 flow. Second operand 4 states and 146 transitions. [2025-03-17 19:45:45,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 335 flow [2025-03-17 19:45:45,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 322 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-17 19:45:45,756 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 246 flow [2025-03-17 19:45:45,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2025-03-17 19:45:45,764 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -8 predicate places. [2025-03-17 19:45:45,764 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 246 flow [2025-03-17 19:45:45,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:45,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:45,765 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 19:45:45,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 19:45:45,765 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:45,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:45,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2025477992, now seen corresponding path program 1 times [2025-03-17 19:45:45,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:45,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584493077] [2025-03-17 19:45:45,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:45,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:45,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 19:45:45,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 19:45:45,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:45,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:45,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584493077] [2025-03-17 19:45:45,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584493077] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:45:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807326598] [2025-03-17 19:45:45,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:45,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:45:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:45:45,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:45:45,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 19:45:45,987 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 19:45:45,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 19:45:45,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:45,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:46,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:45:46,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:45:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:46,041 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:45:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807326598] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:45:46,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:45:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-17 19:45:46,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225474167] [2025-03-17 19:45:46,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:45:46,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:45:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:46,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:45:46,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 19:45:46,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-03-17 19:45:46,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:46,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:46,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-03-17 19:45:46,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:51,851 INFO L124 PetriNetUnfolderBase]: 58876/77288 cut-off events. [2025-03-17 19:45:51,851 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2025-03-17 19:45:52,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155235 conditions, 77288 events. 58876/77288 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 4800. Compared 516320 event pairs, 51710 based on Foata normal form. 3/42396 useless extension candidates. Maximal degree in co-relation 155162. Up to 76171 conditions per place. [2025-03-17 19:45:52,344 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 53 selfloop transitions, 17 changer transitions 0/81 dead transitions. [2025-03-17 19:45:52,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 81 transitions, 374 flow [2025-03-17 19:45:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 19:45:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 19:45:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2025-03-17 19:45:52,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3087121212121212 [2025-03-17 19:45:52,349 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 246 flow. Second operand 6 states and 163 transitions. [2025-03-17 19:45:52,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 81 transitions, 374 flow [2025-03-17 19:45:52,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 19:45:52,351 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 268 flow [2025-03-17 19:45:52,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2025-03-17 19:45:52,352 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2025-03-17 19:45:52,352 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 268 flow [2025-03-17 19:45:52,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:52,353 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:52,353 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2025-03-17 19:45:52,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 19:45:52,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:45:52,558 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:52,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1634690691, now seen corresponding path program 1 times [2025-03-17 19:45:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:52,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376303194] [2025-03-17 19:45:52,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:52,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:45:52,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:45:52,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:52,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:52,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376303194] [2025-03-17 19:45:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376303194] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:45:52,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989973578] [2025-03-17 19:45:52,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:52,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:45:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:45:52,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:45:52,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 19:45:52,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:45:52,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:45:52,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:52,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:52,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:45:52,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:45:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:52,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:45:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:52,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989973578] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:45:52,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:45:52,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-17 19:45:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508628144] [2025-03-17 19:45:52,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:45:52,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 19:45:52,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:52,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 19:45:52,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 19:45:52,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-03-17 19:45:52,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 268 flow. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:52,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:52,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-03-17 19:45:52,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:58,484 INFO L124 PetriNetUnfolderBase]: 58885/77324 cut-off events. [2025-03-17 19:45:58,485 INFO L125 PetriNetUnfolderBase]: For 441/441 co-relation queries the response was YES. [2025-03-17 19:45:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155376 conditions, 77324 events. 58885/77324 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 4800. Compared 516644 event pairs, 51710 based on Foata normal form. 9/42438 useless extension candidates. Maximal degree in co-relation 155164. Up to 76186 conditions per place. [2025-03-17 19:45:58,937 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 60 selfloop transitions, 37 changer transitions 0/108 dead transitions. [2025-03-17 19:45:58,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 636 flow [2025-03-17 19:45:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 19:45:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 19:45:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2025-03-17 19:45:58,940 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2909090909090909 [2025-03-17 19:45:58,940 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 268 flow. Second operand 10 states and 256 transitions. [2025-03-17 19:45:58,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 636 flow [2025-03-17 19:45:58,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 108 transitions, 553 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-03-17 19:45:58,944 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 483 flow [2025-03-17 19:45:58,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=483, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2025-03-17 19:45:58,945 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2025-03-17 19:45:58,946 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 483 flow [2025-03-17 19:45:58,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:58,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:58,946 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:45:58,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 19:45:59,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-17 19:45:59,147 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:59,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash -513890544, now seen corresponding path program 1 times [2025-03-17 19:45:59,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:59,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637535157] [2025-03-17 19:45:59,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:59,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:59,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 19:45:59,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 19:45:59,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:59,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:59,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:59,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637535157] [2025-03-17 19:45:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637535157] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:45:59,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:45:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 19:45:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900873588] [2025-03-17 19:45:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:45:59,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:45:59,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:59,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:45:59,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:45:59,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2025-03-17 19:45:59,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 483 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:59,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:59,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2025-03-17 19:45:59,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand