./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:23:38,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:23:38,066 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:23:38,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:23:38,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:23:38,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:23:38,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:23:38,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:23:38,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:23:38,093 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:23:38,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:23:38,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:23:38,095 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:23:38,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:23:38,095 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:23:38,095 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:23:38,095 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:23:38,095 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:23:38,096 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:23:38,097 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:23:38,097 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:23:38,097 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:23:38,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:23:38,097 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:23:38,098 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:23:38,098 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:23:38,098 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2025-03-09 01:23:38,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:23:38,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:23:38,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:23:38,323 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:23:38,323 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:23:38,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2025-03-09 01:23:39,424 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00cb5a9f0/b88429da843c4b55975af885eabcc4d8/FLAGea91904e3 [2025-03-09 01:23:39,672 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:23:39,677 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2025-03-09 01:23:39,685 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00cb5a9f0/b88429da843c4b55975af885eabcc4d8/FLAGea91904e3 [2025-03-09 01:23:39,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00cb5a9f0/b88429da843c4b55975af885eabcc4d8 [2025-03-09 01:23:39,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:23:39,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:23:39,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:23:39,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:23:39,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:23:39,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:39,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5880286c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39, skipping insertion in model container [2025-03-09 01:23:39,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:39,728 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:23:39,873 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-09 01:23:39,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:23:39,884 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:23:39,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:23:39,923 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:23:39,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39 WrapperNode [2025-03-09 01:23:39,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:23:39,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:23:39,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:23:39,925 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:23:39,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:39,941 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:39,970 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 447 [2025-03-09 01:23:39,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:23:39,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:23:39,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:23:39,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:23:39,984 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:39,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:39,988 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,006 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2025-03-09 01:23:40,007 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,007 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,022 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,032 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:23:40,032 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:23:40,032 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:23:40,032 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:23:40,036 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (1/1) ... [2025-03-09 01:23:40,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:23:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:40,070 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) [2025-03-09 01:23:40,074 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 [2025-03-09 01:23:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:23:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:23:40,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:23:40,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-09 01:23:40,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-09 01:23:40,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:23:40,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:23:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 01:23:40,098 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:23:40,187 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:23:40,188 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:23:40,718 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:23:40,718 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:23:41,054 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:23:41,054 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:23:41,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:41 BoogieIcfgContainer [2025-03-09 01:23:41,055 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:23:41,057 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:23:41,057 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:23:41,061 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:23:41,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:23:39" (1/3) ... [2025-03-09 01:23:41,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b2d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:23:41, skipping insertion in model container [2025-03-09 01:23:41,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:39" (2/3) ... [2025-03-09 01:23:41,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b2d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:23:41, skipping insertion in model container [2025-03-09 01:23:41,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:41" (3/3) ... [2025-03-09 01:23:41,063 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2025-03-09 01:23:41,076 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:23:41,077 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-2.wvr-bad.c that has 5 procedures, 99 locations, 1 initial locations, 8 loop locations, and 34 error locations. [2025-03-09 01:23:41,078 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:23:41,159 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-09 01:23:41,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 272 flow [2025-03-09 01:23:41,223 INFO L124 PetriNetUnfolderBase]: 24/118 cut-off events. [2025-03-09 01:23:41,225 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:23:41,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 118 events. 24/118 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 376 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 98. Up to 8 conditions per place. [2025-03-09 01:23:41,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 272 flow [2025-03-09 01:23:41,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 117 transitions, 258 flow [2025-03-09 01:23:41,251 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:23:41,263 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=None, 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;@7a8899b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:23:41,264 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2025-03-09 01:23:41,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:23:41,266 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:23:41,267 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:23:41,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:41,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:23:41,267 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2025-03-09 01:23:41,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1267283, now seen corresponding path program 1 times [2025-03-09 01:23:41,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:41,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055038379] [2025-03-09 01:23:41,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:41,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:41,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:23:41,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:23:41,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:41,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:41,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055038379] [2025-03-09 01:23:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055038379] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:41,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:41,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:23:41,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479873038] [2025-03-09 01:23:41,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:41,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:23:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:41,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:23:41,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:23:41,532 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2025-03-09 01:23:41,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2025-03-09 01:23:41,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:41,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2025-03-09 01:23:41,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:50,282 INFO L124 PetriNetUnfolderBase]: 118506/156587 cut-off events. [2025-03-09 01:23:50,283 INFO L125 PetriNetUnfolderBase]: For 3212/3212 co-relation queries the response was YES. [2025-03-09 01:23:50,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304611 conditions, 156587 events. 118506/156587 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 12452. Compared 1174129 event pairs, 87208 based on Foata normal form. 1/82188 useless extension candidates. Maximal degree in co-relation 296868. Up to 144091 conditions per place. [2025-03-09 01:23:51,199 INFO L140 encePairwiseOnDemand]: 111/122 looper letters, 76 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2025-03-09 01:23:51,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 107 transitions, 394 flow [2025-03-09 01:23:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:23:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:23:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2025-03-09 01:23:51,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5163934426229508 [2025-03-09 01:23:51,212 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 258 flow. Second operand 3 states and 189 transitions. [2025-03-09 01:23:51,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 107 transitions, 394 flow [2025-03-09 01:23:51,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 378 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-09 01:23:51,597 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 226 flow [2025-03-09 01:23:51,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2025-03-09 01:23:51,601 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2025-03-09 01:23:51,601 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 226 flow [2025-03-09 01:23:51,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2025-03-09 01:23:51,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:51,601 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:23:51,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:23:51,602 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2025-03-09 01:23:51,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:51,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1267284, now seen corresponding path program 1 times [2025-03-09 01:23:51,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:51,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547031693] [2025-03-09 01:23:51,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:51,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:51,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:23:51,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:23:51,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:51,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:51,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:51,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547031693] [2025-03-09 01:23:51,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547031693] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:51,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:51,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:23:51,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417431394] [2025-03-09 01:23:51,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:51,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:23:51,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:51,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:23:51,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:23:51,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2025-03-09 01:23:51,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2025-03-09 01:23:51,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:51,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2025-03-09 01:23:51,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:59,979 INFO L124 PetriNetUnfolderBase]: 118510/156599 cut-off events. [2025-03-09 01:23:59,981 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2025-03-09 01:24:00,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302271 conditions, 156599 events. 118510/156599 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 12452. Compared 1174295 event pairs, 87208 based on Foata normal form. 0/82193 useless extension candidates. Maximal degree in co-relation 302207. Up to 144108 conditions per place. [2025-03-09 01:24:01,005 INFO L140 encePairwiseOnDemand]: 105/122 looper letters, 81 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2025-03-09 01:24:01,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 440 flow [2025-03-09 01:24:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2025-03-09 01:24:01,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47950819672131145 [2025-03-09 01:24:01,010 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 226 flow. Second operand 4 states and 234 transitions. [2025-03-09 01:24:01,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 440 flow [2025-03-09 01:24:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:01,012 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 330 flow [2025-03-09 01:24:01,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2025-03-09 01:24:01,013 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2025-03-09 01:24:01,013 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 330 flow [2025-03-09 01:24:01,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2025-03-09 01:24:01,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:01,014 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-09 01:24:01,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:24:01,014 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2025-03-09 01:24:01,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:01,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1217898089, now seen corresponding path program 1 times [2025-03-09 01:24:01,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:01,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300752917] [2025-03-09 01:24:01,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:01,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:01,023 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:24:01,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:24:01,032 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:01,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:01,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:01,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300752917] [2025-03-09 01:24:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300752917] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:24:01,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090138049] [2025-03-09 01:24:01,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:01,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:01,206 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) [2025-03-09 01:24:01,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:24:01,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:24:01,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:24:01,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:01,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:01,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:24:01,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:01,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-09 01:24:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:01,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:01,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090138049] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:01,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:24:01,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-09 01:24:01,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207573106] [2025-03-09 01:24:01,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:01,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 01:24:01,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:01,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 01:24:01,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-09 01:24:01,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2025-03-09 01:24:01,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 330 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2025-03-09 01:24:01,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:01,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2025-03-09 01:24:01,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand