./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 798a7b37 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-?-798a7b3-m [2025-03-04 10:10:45,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:10:45,137 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:10:45,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:10:45,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:10:45,158 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:10:45,159 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:10:45,159 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:10:45,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:10:45,159 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:10:45,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:10:45,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:10:45,159 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:10:45,159 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:10:45,159 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:10:45,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:10:45,160 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:10:45,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:10:45,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:10:45,161 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:10:45,161 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 [2025-03-04 10:10:45,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:10:45,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:10:45,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:10:45,395 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:10:45,395 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:10:45,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2025-03-04 10:10:46,526 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65df5ed4f/e27dba3cfc1a4640bfa6c4bf858781a2/FLAG4f1d4207b [2025-03-04 10:10:46,750 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:10:46,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2025-03-04 10:10:46,761 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65df5ed4f/e27dba3cfc1a4640bfa6c4bf858781a2/FLAG4f1d4207b [2025-03-04 10:10:47,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65df5ed4f/e27dba3cfc1a4640bfa6c4bf858781a2 [2025-03-04 10:10:47,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:10:47,089 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:10:47,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:10:47,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:10:47,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:10:47,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f887bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47, skipping insertion in model container [2025-03-04 10:10:47,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,109 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:10:47,250 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 10:10:47,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:10:47,264 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:10:47,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:10:47,316 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:10:47,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47 WrapperNode [2025-03-04 10:10:47,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:10:47,318 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:10:47,318 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:10:47,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:10:47,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,365 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 447 [2025-03-04 10:10:47,365 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:10:47,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:10:47,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:10:47,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:10:47,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,402 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]. [2025-03-04 10:10:47,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,412 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:10:47,420 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:10:47,420 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:10:47,420 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:10:47,421 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (1/1) ... [2025-03-04 10:10:47,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:10:47,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:10:47,451 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) [2025-03-04 10:10:47,455 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 [2025-03-04 10:10:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:10:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 10:10:47,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 10:10:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 10:10:47,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 10:10:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-04 10:10:47,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-04 10:10:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-04 10:10:47,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-04 10:10:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:10:47,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 10:10:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 10:10:47,479 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 10:10:47,591 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:10:47,594 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:10:48,152 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:10:48,153 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:10:48,495 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:10:48,495 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:10:48,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:10:48 BoogieIcfgContainer [2025-03-04 10:10:48,496 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:10:48,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:10:48,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:10:48,503 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:10:48,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:10:47" (1/3) ... [2025-03-04 10:10:48,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdff75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:10:48, skipping insertion in model container [2025-03-04 10:10:48,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:10:47" (2/3) ... [2025-03-04 10:10:48,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdff75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:10:48, skipping insertion in model container [2025-03-04 10:10:48,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:10:48" (3/3) ... [2025-03-04 10:10:48,504 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2025-03-04 10:10:48,518 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:10:48,519 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. [2025-03-04 10:10:48,519 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:10:48,615 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-04 10:10:48,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 272 flow [2025-03-04 10:10:48,686 INFO L124 PetriNetUnfolderBase]: 24/118 cut-off events. [2025-03-04 10:10:48,689 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 10:10:48,697 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. [2025-03-04 10:10:48,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 272 flow [2025-03-04 10:10:48,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 117 transitions, 258 flow [2025-03-04 10:10:48,708 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:10:48,720 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;@38cff538, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:10:48,720 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2025-03-04 10:10:48,724 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:10:48,726 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-04 10:10:48,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:10:48,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:10:48,727 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:10:48,727 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2025-03-04 10:10:48,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:10:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1267283, now seen corresponding path program 1 times [2025-03-04 10:10:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:10:48,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407402572] [2025-03-04 10:10:48,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:10:48,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:10:48,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:10:48,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:10:48,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:10:48,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:10:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:10:48,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:10:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407402572] [2025-03-04 10:10:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407402572] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:10:48,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:10:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 10:10:48,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306023494] [2025-03-04 10:10:48,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:10:48,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:10:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:10:48,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:10:48,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:10:48,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2025-03-04 10:10:48,983 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) [2025-03-04 10:10:48,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:10:48,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2025-03-04 10:10:48,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:10:57,817 INFO L124 PetriNetUnfolderBase]: 118506/156587 cut-off events. [2025-03-04 10:10:57,817 INFO L125 PetriNetUnfolderBase]: For 3212/3212 co-relation queries the response was YES. [2025-03-04 10:10:58,172 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. [2025-03-04 10:10:59,067 INFO L140 encePairwiseOnDemand]: 111/122 looper letters, 76 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2025-03-04 10:10:59,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 107 transitions, 394 flow [2025-03-04 10:10:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:10:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:10:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2025-03-04 10:10:59,076 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5163934426229508 [2025-03-04 10:10:59,077 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 258 flow. Second operand 3 states and 189 transitions. [2025-03-04 10:10:59,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 107 transitions, 394 flow [2025-03-04 10:10:59,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 378 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-04 10:10:59,225 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 226 flow [2025-03-04 10:10:59,226 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} [2025-03-04 10:10:59,229 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2025-03-04 10:10:59,229 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 226 flow [2025-03-04 10:10:59,229 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) [2025-03-04 10:10:59,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:10:59,229 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:10:59,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 10:10:59,230 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2025-03-04 10:10:59,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:10:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1267284, now seen corresponding path program 1 times [2025-03-04 10:10:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:10:59,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089957190] [2025-03-04 10:10:59,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:10:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:10:59,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:10:59,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:10:59,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:10:59,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:10:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:10:59,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:10:59,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089957190] [2025-03-04 10:10:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089957190] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:10:59,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:10:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:10:59,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923667893] [2025-03-04 10:10:59,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:10:59,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:10:59,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:10:59,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:10:59,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:10:59,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2025-03-04 10:10:59,497 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) [2025-03-04 10:10:59,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:10:59,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2025-03-04 10:10:59,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:11:07,330 INFO L124 PetriNetUnfolderBase]: 118510/156599 cut-off events. [2025-03-04 10:11:07,330 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2025-03-04 10:11:07,580 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. [2025-03-04 10:11:08,168 INFO L140 encePairwiseOnDemand]: 105/122 looper letters, 81 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2025-03-04 10:11:08,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 440 flow [2025-03-04 10:11:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:11:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:11:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2025-03-04 10:11:08,174 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47950819672131145 [2025-03-04 10:11:08,175 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 226 flow. Second operand 4 states and 234 transitions. [2025-03-04 10:11:08,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 440 flow [2025-03-04 10:11:08,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:11:08,179 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 330 flow [2025-03-04 10:11:08,179 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} [2025-03-04 10:11:08,180 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2025-03-04 10:11:08,180 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 330 flow [2025-03-04 10:11:08,180 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) [2025-03-04 10:11:08,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:11:08,181 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-04 10:11:08,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 10:11:08,182 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2025-03-04 10:11:08,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:11:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1217898089, now seen corresponding path program 1 times [2025-03-04 10:11:08,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:11:08,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076801225] [2025-03-04 10:11:08,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:11:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:11:08,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 10:11:08,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 10:11:08,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:11:08,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:11:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:11:08,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:11:08,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076801225] [2025-03-04 10:11:08,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076801225] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:11:08,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444607284] [2025-03-04 10:11:08,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:11:08,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:11:08,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:11:08,449 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) [2025-03-04 10:11:08,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 10:11:08,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 10:11:08,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 10:11:08,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:11:08,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:11:08,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:11:08,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:11:08,576 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 [2025-03-04 10:11:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:11:08,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:11:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:11:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444607284] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:11:08,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:11:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-04 10:11:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026702737] [2025-03-04 10:11:08,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:11:08,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 10:11:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:11:08,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 10:11:08,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-04 10:11:08,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2025-03-04 10:11:08,967 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) [2025-03-04 10:11:08,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:11:08,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2025-03-04 10:11:08,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand