./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:27:13,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:27:13,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:27:13,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:27:13,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:27:13,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:27:13,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:27:13,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:27:13,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:27:13,779 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:27:13,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:27:13,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:27:13,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:27:13,780 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:27:13,780 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:27:13,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:27:13,780 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:27:13,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:27:13,781 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:27:13,782 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:27:13,782 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:27:13,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:27:13,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:27:13,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:27:13,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:27:13,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:27:13,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:27:13,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:27:13,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:27:13,783 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:27:13,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:27:13,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:27:13,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:27:13,783 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 -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2025-03-17 14:27:14,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:27:14,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:27:14,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:27:14,019 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:27:14,020 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:27:14,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2025-03-17 14:27:15,181 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a76acec6/35813d892a84414b8a83f03bebeb26d3/FLAG0bed03446 [2025-03-17 14:27:15,411 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:27:15,412 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2025-03-17 14:27:15,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a76acec6/35813d892a84414b8a83f03bebeb26d3/FLAG0bed03446 [2025-03-17 14:27:15,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a76acec6/35813d892a84414b8a83f03bebeb26d3 [2025-03-17 14:27:15,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:27:15,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:27:15,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:27:15,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:27:15,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:27:15,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5f9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15, skipping insertion in model container [2025-03-17 14:27:15,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,776 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:27:15,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:27:15,886 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:27:15,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:27:15,911 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:27:15,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15 WrapperNode [2025-03-17 14:27:15,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:27:15,913 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:27:15,913 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:27:15,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:27:15,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,941 INFO L138 Inliner]: procedures = 20, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 50 [2025-03-17 14:27:15,943 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:27:15,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:27:15,943 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:27:15,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:27:15,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,949 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,957 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 14:27:15,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,959 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,960 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:27:15,964 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:27:15,965 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:27:15,965 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:27:15,965 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (1/1) ... [2025-03-17 14:27:15,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:27:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:15,986 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 14:27:15,988 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 14:27:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:27:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:27:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:27:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:27:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:27:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:27:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:27:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:27:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:27:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:27:16,004 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 14:27:16,058 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:27:16,060 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:27:16,227 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:27:16,228 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:27:16,319 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:27:16,319 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:27:16,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:27:16 BoogieIcfgContainer [2025-03-17 14:27:16,319 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:27:16,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:27:16,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:27:16,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:27:16,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:27:15" (1/3) ... [2025-03-17 14:27:16,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24347b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:27:16, skipping insertion in model container [2025-03-17 14:27:16,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:27:15" (2/3) ... [2025-03-17 14:27:16,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24347b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:27:16, skipping insertion in model container [2025-03-17 14:27:16,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:27:16" (3/3) ... [2025-03-17 14:27:16,328 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2025-03-17 14:27:16,339 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:27:16,340 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-threaded-sum-2.wvr.c that has 3 procedures, 26 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-17 14:27:16,340 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:27:16,379 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:27:16,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 27 transitions, 68 flow [2025-03-17 14:27:16,435 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2025-03-17 14:27:16,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:27:16,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 2/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-03-17 14:27:16,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 27 transitions, 68 flow [2025-03-17 14:27:16,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 60 flow [2025-03-17 14:27:16,448 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:27:16,460 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;@7010b799, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:27:16,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 14:27:16,467 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:27:16,469 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2025-03-17 14:27:16,469 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:27:16,469 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:16,469 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:16,470 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:16,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1890097139, now seen corresponding path program 1 times [2025-03-17 14:27:16,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:16,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010668851] [2025-03-17 14:27:16,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:16,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:16,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:27:16,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:27:16,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:16,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:16,894 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 14:27:16,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010668851] [2025-03-17 14:27:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010668851] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:16,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:16,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:27:16,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394534637] [2025-03-17 14:27:16,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:16,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:27:16,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:16,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:27:16,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:27:16,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-03-17 14:27:16,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 14:27:16,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:16,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-03-17 14:27:16,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:17,085 INFO L124 PetriNetUnfolderBase]: 120/234 cut-off events. [2025-03-17 14:27:17,085 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-17 14:27:17,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 234 events. 120/234 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 867 event pairs, 9 based on Foata normal form. 17/249 useless extension candidates. Maximal degree in co-relation 425. Up to 134 conditions per place. [2025-03-17 14:27:17,091 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 35 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2025-03-17 14:27:17,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 195 flow [2025-03-17 14:27:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:27:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:27:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-03-17 14:27:17,104 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2025-03-17 14:27:17,105 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 5 states and 84 transitions. [2025-03-17 14:27:17,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 195 flow [2025-03-17 14:27:17,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 46 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:27:17,111 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2025-03-17 14:27:17,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2025-03-17 14:27:17,117 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2025-03-17 14:27:17,117 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2025-03-17 14:27:17,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 14:27:17,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:17,118 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:17,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:27:17,119 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:17,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 911274554, now seen corresponding path program 1 times [2025-03-17 14:27:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402194778] [2025-03-17 14:27:17,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:17,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:27:17,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:27:17,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:17,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:27:17,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:17,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402194778] [2025-03-17 14:27:17,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402194778] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:17,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:17,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:27:17,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429385060] [2025-03-17 14:27:17,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:17,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:27:17,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:17,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:27:17,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:27:17,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-03-17 14:27:17,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 14:27:17,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:17,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-03-17 14:27:17,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:17,460 INFO L124 PetriNetUnfolderBase]: 146/290 cut-off events. [2025-03-17 14:27:17,461 INFO L125 PetriNetUnfolderBase]: For 194/194 co-relation queries the response was YES. [2025-03-17 14:27:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 290 events. 146/290 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1186 event pairs, 15 based on Foata normal form. 13/299 useless extension candidates. Maximal degree in co-relation 251. Up to 144 conditions per place. [2025-03-17 14:27:17,465 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 36 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2025-03-17 14:27:17,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 243 flow [2025-03-17 14:27:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:27:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:27:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2025-03-17 14:27:17,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2025-03-17 14:27:17,468 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 4 states and 64 transitions. [2025-03-17 14:27:17,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 243 flow [2025-03-17 14:27:17,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:27:17,470 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 104 flow [2025-03-17 14:27:17,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2025-03-17 14:27:17,470 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2025-03-17 14:27:17,470 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 104 flow [2025-03-17 14:27:17,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 14:27:17,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:17,471 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:17,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:27:17,471 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:17,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1206266606, now seen corresponding path program 1 times [2025-03-17 14:27:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979755356] [2025-03-17 14:27:17,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:17,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:27:17,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:27:17,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:17,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:17,634 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 14:27:17,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979755356] [2025-03-17 14:27:17,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979755356] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:17,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:17,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:27:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811309889] [2025-03-17 14:27:17,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:17,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:27:17,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:17,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:27:17,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:27:17,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-03-17 14:27:17,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 14:27:17,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:17,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-03-17 14:27:17,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:17,740 INFO L124 PetriNetUnfolderBase]: 156/301 cut-off events. [2025-03-17 14:27:17,740 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2025-03-17 14:27:17,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 301 events. 156/301 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1207 event pairs, 23 based on Foata normal form. 16/315 useless extension candidates. Maximal degree in co-relation 364. Up to 109 conditions per place. [2025-03-17 14:27:17,744 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2025-03-17 14:27:17,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 253 flow [2025-03-17 14:27:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:27:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:27:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2025-03-17 14:27:17,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2025-03-17 14:27:17,746 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 104 flow. Second operand 5 states and 78 transitions. [2025-03-17 14:27:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 253 flow [2025-03-17 14:27:17,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:17,748 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 150 flow [2025-03-17 14:27:17,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2025-03-17 14:27:17,748 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2025-03-17 14:27:17,748 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 150 flow [2025-03-17 14:27:17,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 14:27:17,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:17,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:17,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:27:17,749 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:17,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1850878134, now seen corresponding path program 2 times [2025-03-17 14:27:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163347324] [2025-03-17 14:27:17,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:27:17,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:17,758 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:27:17,788 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:27:17,788 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:27:17,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:18,260 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 14:27:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:18,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163347324] [2025-03-17 14:27:18,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163347324] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:18,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:18,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:27:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571872434] [2025-03-17 14:27:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:18,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:27:18,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:18,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:27:18,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:27:18,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-03-17 14:27:18,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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 14:27:18,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:18,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-03-17 14:27:18,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:18,520 INFO L124 PetriNetUnfolderBase]: 241/457 cut-off events. [2025-03-17 14:27:18,521 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2025-03-17 14:27:18,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1390 conditions, 457 events. 241/457 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1920 event pairs, 14 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 557. Up to 262 conditions per place. [2025-03-17 14:27:18,524 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 41 selfloop transitions, 14 changer transitions 9/69 dead transitions. [2025-03-17 14:27:18,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 69 transitions, 420 flow [2025-03-17 14:27:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:27:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:27:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2025-03-17 14:27:18,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2025-03-17 14:27:18,525 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 150 flow. Second operand 10 states and 141 transitions. [2025-03-17 14:27:18,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 69 transitions, 420 flow [2025-03-17 14:27:18,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:27:18,528 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 241 flow [2025-03-17 14:27:18,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=241, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2025-03-17 14:27:18,529 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2025-03-17 14:27:18,529 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 241 flow [2025-03-17 14:27:18,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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 14:27:18,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:18,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:18,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:27:18,529 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:18,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1054630783, now seen corresponding path program 1 times [2025-03-17 14:27:18,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:18,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695284744] [2025-03-17 14:27:18,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:18,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:27:18,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:27:18,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:18,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:18,706 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 14:27:18,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695284744] [2025-03-17 14:27:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695284744] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226316018] [2025-03-17 14:27:18,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:18,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:18,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:18,709 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 14:27:18,710 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 14:27:18,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:27:18,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:27:18,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:18,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:18,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:27:18,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:18,883 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 14:27:18,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:27:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:27:18,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226316018] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:27:18,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:27:18,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2025-03-17 14:27:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553953890] [2025-03-17 14:27:18,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:27:18,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:27:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:18,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:27:18,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:27:18,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2025-03-17 14:27:18,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 241 flow. Second operand has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 12 states have internal predecessors, (119), 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 14:27:18,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:18,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2025-03-17 14:27:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:19,708 INFO L124 PetriNetUnfolderBase]: 1054/1780 cut-off events. [2025-03-17 14:27:19,708 INFO L125 PetriNetUnfolderBase]: For 3236/3236 co-relation queries the response was YES. [2025-03-17 14:27:19,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5813 conditions, 1780 events. 1054/1780 cut-off events. For 3236/3236 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8610 event pairs, 47 based on Foata normal form. 22/1801 useless extension candidates. Maximal degree in co-relation 5786. Up to 380 conditions per place. [2025-03-17 14:27:19,723 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 149 selfloop transitions, 89 changer transitions 0/241 dead transitions. [2025-03-17 14:27:19,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 241 transitions, 1699 flow [2025-03-17 14:27:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-17 14:27:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-17 14:27:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 380 transitions. [2025-03-17 14:27:19,729 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2025-03-17 14:27:19,729 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 241 flow. Second operand 30 states and 380 transitions. [2025-03-17 14:27:19,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 241 transitions, 1699 flow [2025-03-17 14:27:19,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 241 transitions, 1643 flow, removed 21 selfloop flow, removed 4 redundant places. [2025-03-17 14:27:19,745 INFO L231 Difference]: Finished difference. Result has 93 places, 126 transitions, 1088 flow [2025-03-17 14:27:19,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1088, PETRI_PLACES=93, PETRI_TRANSITIONS=126} [2025-03-17 14:27:19,747 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2025-03-17 14:27:19,747 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 126 transitions, 1088 flow [2025-03-17 14:27:19,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 12 states have internal predecessors, (119), 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 14:27:19,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:19,748 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:19,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:27:19,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:19,949 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:19,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1948915415, now seen corresponding path program 2 times [2025-03-17 14:27:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:19,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131087580] [2025-03-17 14:27:19,949 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:27:19,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:19,954 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:27:19,989 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:27:19,992 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:27:19,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:27:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131087580] [2025-03-17 14:27:20,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131087580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352838809] [2025-03-17 14:27:20,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:27:20,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:20,636 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 14:27:20,637 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 14:27:20,665 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:27:20,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:27:20,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:27:20,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:20,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:27:20,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:27:21,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:27:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:27:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352838809] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:27:21,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:27:21,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2025-03-17 14:27:21,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888647257] [2025-03-17 14:27:21,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:27:21,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:27:21,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:21,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:27:21,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:27:21,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2025-03-17 14:27:21,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 126 transitions, 1088 flow. Second operand has 22 states, 22 states have (on average 9.454545454545455) internal successors, (208), 22 states have internal predecessors, (208), 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 14:27:21,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:21,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2025-03-17 14:27:21,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:25,518 INFO L124 PetriNetUnfolderBase]: 1926/3543 cut-off events. [2025-03-17 14:27:25,519 INFO L125 PetriNetUnfolderBase]: For 25298/25298 co-relation queries the response was YES. [2025-03-17 14:27:25,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17527 conditions, 3543 events. 1926/3543 cut-off events. For 25298/25298 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22288 event pairs, 21 based on Foata normal form. 15/3556 useless extension candidates. Maximal degree in co-relation 13395. Up to 923 conditions per place. [2025-03-17 14:27:25,547 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 271 selfloop transitions, 178 changer transitions 103/556 dead transitions. [2025-03-17 14:27:25,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 556 transitions, 5737 flow [2025-03-17 14:27:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-17 14:27:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-03-17 14:27:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 619 transitions. [2025-03-17 14:27:25,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49838969404186795 [2025-03-17 14:27:25,550 INFO L175 Difference]: Start difference. First operand has 93 places, 126 transitions, 1088 flow. Second operand 46 states and 619 transitions. [2025-03-17 14:27:25,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 556 transitions, 5737 flow [2025-03-17 14:27:25,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 556 transitions, 5071 flow, removed 325 selfloop flow, removed 4 redundant places. [2025-03-17 14:27:25,597 INFO L231 Difference]: Finished difference. Result has 157 places, 273 transitions, 2737 flow [2025-03-17 14:27:25,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2737, PETRI_PLACES=157, PETRI_TRANSITIONS=273} [2025-03-17 14:27:25,598 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2025-03-17 14:27:25,598 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 273 transitions, 2737 flow [2025-03-17 14:27:25,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.454545454545455) internal successors, (208), 22 states have internal predecessors, (208), 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 14:27:25,599 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:25,599 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:25,604 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 14:27:25,799 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,SelfDestructingSolverStorable5 [2025-03-17 14:27:25,799 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:25,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1350187013, now seen corresponding path program 3 times [2025-03-17 14:27:25,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:25,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823237803] [2025-03-17 14:27:25,800 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:27:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:25,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:27:25,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-03-17 14:27:25,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:27:25,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:27:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823237803] [2025-03-17 14:27:25,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823237803] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:25,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:25,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:27:25,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859078876] [2025-03-17 14:27:25,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:25,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:27:25,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:25,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:27:25,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:27:25,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-03-17 14:27:25,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 273 transitions, 2737 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 14:27:25,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:25,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-03-17 14:27:25,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:26,538 INFO L124 PetriNetUnfolderBase]: 1991/3798 cut-off events. [2025-03-17 14:27:26,538 INFO L125 PetriNetUnfolderBase]: For 29574/29759 co-relation queries the response was YES. [2025-03-17 14:27:26,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19526 conditions, 3798 events. 1991/3798 cut-off events. For 29574/29759 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 25769 event pairs, 259 based on Foata normal form. 58/3785 useless extension candidates. Maximal degree in co-relation 19275. Up to 1052 conditions per place. [2025-03-17 14:27:26,576 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 284 selfloop transitions, 175 changer transitions 0/484 dead transitions. [2025-03-17 14:27:26,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 484 transitions, 5777 flow [2025-03-17 14:27:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:27:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:27:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2025-03-17 14:27:26,577 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2025-03-17 14:27:26,577 INFO L175 Difference]: Start difference. First operand has 157 places, 273 transitions, 2737 flow. Second operand 7 states and 114 transitions. [2025-03-17 14:27:26,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 484 transitions, 5777 flow [2025-03-17 14:27:26,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 484 transitions, 5331 flow, removed 199 selfloop flow, removed 19 redundant places. [2025-03-17 14:27:26,671 INFO L231 Difference]: Finished difference. Result has 134 places, 378 transitions, 4229 flow [2025-03-17 14:27:26,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4229, PETRI_PLACES=134, PETRI_TRANSITIONS=378} [2025-03-17 14:27:26,672 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2025-03-17 14:27:26,672 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 378 transitions, 4229 flow [2025-03-17 14:27:26,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 14:27:26,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:26,673 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:26,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:27:26,673 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:26,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash 346582957, now seen corresponding path program 4 times [2025-03-17 14:27:26,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:26,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444713584] [2025-03-17 14:27:26,673 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:27:26,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:26,680 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-17 14:27:26,686 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:27:26,687 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:27:26,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:27:26,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:26,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444713584] [2025-03-17 14:27:26,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444713584] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:26,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:26,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:27:26,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011954796] [2025-03-17 14:27:26,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:26,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:27:26,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:26,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:27:26,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:27:26,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2025-03-17 14:27:26,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 378 transitions, 4229 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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 14:27:26,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:26,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2025-03-17 14:27:26,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:27,609 INFO L124 PetriNetUnfolderBase]: 3009/5317 cut-off events. [2025-03-17 14:27:27,609 INFO L125 PetriNetUnfolderBase]: For 46646/46910 co-relation queries the response was YES. [2025-03-17 14:27:27,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28922 conditions, 5317 events. 3009/5317 cut-off events. For 46646/46910 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34347 event pairs, 54 based on Foata normal form. 148/5434 useless extension candidates. Maximal degree in co-relation 26420. Up to 1377 conditions per place. [2025-03-17 14:27:27,675 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 473 selfloop transitions, 232 changer transitions 0/729 dead transitions. [2025-03-17 14:27:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 729 transitions, 9407 flow [2025-03-17 14:27:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:27:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:27:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2025-03-17 14:27:27,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2025-03-17 14:27:27,682 INFO L175 Difference]: Start difference. First operand has 134 places, 378 transitions, 4229 flow. Second operand 9 states and 120 transitions. [2025-03-17 14:27:27,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 729 transitions, 9407 flow [2025-03-17 14:27:27,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 729 transitions, 9323 flow, removed 42 selfloop flow, removed 0 redundant places. [2025-03-17 14:27:27,861 INFO L231 Difference]: Finished difference. Result has 145 places, 504 transitions, 6897 flow [2025-03-17 14:27:27,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6897, PETRI_PLACES=145, PETRI_TRANSITIONS=504} [2025-03-17 14:27:27,862 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2025-03-17 14:27:27,862 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 504 transitions, 6897 flow [2025-03-17 14:27:27,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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 14:27:27,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:27,864 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:27,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:27:27,865 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:27,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:27,865 INFO L85 PathProgramCache]: Analyzing trace with hash -576182116, now seen corresponding path program 3 times [2025-03-17 14:27:27,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:27,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729421564] [2025-03-17 14:27:27,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:27:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:27,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-17 14:27:27,901 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:27:27,901 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:27:27,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:28,471 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 14:27:28,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:28,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729421564] [2025-03-17 14:27:28,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729421564] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:28,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240253923] [2025-03-17 14:27:28,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:27:28,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:28,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:28,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:27:28,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:27:28,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-17 14:27:28,525 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:27:28,525 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:27:28,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:28,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:27:28,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:28,855 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 14:27:28,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:27:29,664 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 14:27:29,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240253923] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:27:29,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:27:29,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2025-03-17 14:27:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382735683] [2025-03-17 14:27:29,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:27:29,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:27:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:29,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:27:29,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:27:29,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2025-03-17 14:27:29,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 504 transitions, 6897 flow. Second operand has 25 states, 25 states have (on average 8.64) internal successors, (216), 25 states have internal predecessors, (216), 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 14:27:29,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:29,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2025-03-17 14:27:29,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:41,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:27:43,093 INFO L124 PetriNetUnfolderBase]: 6052/10317 cut-off events. [2025-03-17 14:27:43,093 INFO L125 PetriNetUnfolderBase]: For 114460/114460 co-relation queries the response was YES. [2025-03-17 14:27:43,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63776 conditions, 10317 events. 6052/10317 cut-off events. For 114460/114460 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 70142 event pairs, 125 based on Foata normal form. 14/10330 useless extension candidates. Maximal degree in co-relation 56831. Up to 3562 conditions per place. [2025-03-17 14:27:43,174 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 782 selfloop transitions, 530 changer transitions 81/1396 dead transitions. [2025-03-17 14:27:43,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 1396 transitions, 19912 flow [2025-03-17 14:27:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-03-17 14:27:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2025-03-17 14:27:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 745 transitions. [2025-03-17 14:27:43,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44504181600955794 [2025-03-17 14:27:43,178 INFO L175 Difference]: Start difference. First operand has 145 places, 504 transitions, 6897 flow. Second operand 62 states and 745 transitions. [2025-03-17 14:27:43,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 1396 transitions, 19912 flow [2025-03-17 14:27:43,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1396 transitions, 19832 flow, removed 37 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:43,624 INFO L231 Difference]: Finished difference. Result has 246 places, 927 transitions, 14206 flow [2025-03-17 14:27:43,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6879, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=14206, PETRI_PLACES=246, PETRI_TRANSITIONS=927} [2025-03-17 14:27:43,625 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 217 predicate places. [2025-03-17 14:27:43,625 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 927 transitions, 14206 flow [2025-03-17 14:27:43,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.64) internal successors, (216), 25 states have internal predecessors, (216), 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 14:27:43,625 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:43,625 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:43,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:27:43,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:43,826 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:27:43,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:43,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2102905082, now seen corresponding path program 4 times [2025-03-17 14:27:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:43,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250292553] [2025-03-17 14:27:43,828 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:27:43,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:43,831 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-17 14:27:43,843 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:27:43,843 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:27:43,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:44,583 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 14:27:44,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:44,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250292553] [2025-03-17 14:27:44,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250292553] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:44,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537740841] [2025-03-17 14:27:44,584 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:27:44,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:44,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:44,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:27:44,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:27:44,613 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-17 14:27:44,702 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:27:44,702 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:27:44,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:44,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:27:44,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:45,367 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 14:27:45,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:27:50,665 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 14:27:50,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537740841] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:27:50,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:27:50,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2025-03-17 14:27:50,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692444997] [2025-03-17 14:27:50,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:27:50,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:27:50,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:50,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:27:50,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=434, Unknown=1, NotChecked=0, Total=552 [2025-03-17 14:27:50,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2025-03-17 14:27:50,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 927 transitions, 14206 flow. Second operand has 24 states, 24 states have (on average 9.458333333333334) internal successors, (227), 24 states have internal predecessors, (227), 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 14:27:50,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:50,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2025-03-17 14:27:50,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:59,153 WARN L286 SmtUtils]: Spent 8.40s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-17 14:28:04,598 INFO L124 PetriNetUnfolderBase]: 6240/11112 cut-off events. [2025-03-17 14:28:04,599 INFO L125 PetriNetUnfolderBase]: For 188341/188389 co-relation queries the response was YES. [2025-03-17 14:28:04,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81018 conditions, 11112 events. 6240/11112 cut-off events. For 188341/188389 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 81553 event pairs, 63 based on Foata normal form. 60/11170 useless extension candidates. Maximal degree in co-relation 80839. Up to 4838 conditions per place. [2025-03-17 14:28:04,704 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 947 selfloop transitions, 491 changer transitions 76/1520 dead transitions. [2025-03-17 14:28:04,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1520 transitions, 25510 flow [2025-03-17 14:28:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-17 14:28:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-17 14:28:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 531 transitions. [2025-03-17 14:28:04,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2025-03-17 14:28:04,706 INFO L175 Difference]: Start difference. First operand has 246 places, 927 transitions, 14206 flow. Second operand 42 states and 531 transitions. [2025-03-17 14:28:04,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1520 transitions, 25510 flow [2025-03-17 14:28:05,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1520 transitions, 24926 flow, removed 275 selfloop flow, removed 10 redundant places. [2025-03-17 14:28:05,927 INFO L231 Difference]: Finished difference. Result has 287 places, 1143 transitions, 18839 flow [2025-03-17 14:28:05,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13755, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=18839, PETRI_PLACES=287, PETRI_TRANSITIONS=1143} [2025-03-17 14:28:05,930 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 258 predicate places. [2025-03-17 14:28:05,930 INFO L471 AbstractCegarLoop]: Abstraction has has 287 places, 1143 transitions, 18839 flow [2025-03-17 14:28:05,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.458333333333334) internal successors, (227), 24 states have internal predecessors, (227), 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 14:28:05,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:05,931 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:05,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:28:06,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:06,132 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:28:06,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash -700273826, now seen corresponding path program 5 times [2025-03-17 14:28:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:06,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485080363] [2025-03-17 14:28:06,133 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:28:06,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:06,137 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-17 14:28:06,147 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:28:06,147 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:28:06,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:28:06,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485080363] [2025-03-17 14:28:06,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485080363] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761953668] [2025-03-17 14:28:06,604 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:28:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:06,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:28:06,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:28:06,638 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-17 14:28:06,703 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:28:06,704 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:28:06,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:06,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 14:28:06,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:28:07,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:28:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761953668] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:07,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:07,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2025-03-17 14:28:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237424334] [2025-03-17 14:28:07,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:07,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 14:28:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:07,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 14:28:07,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2025-03-17 14:28:07,587 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2025-03-17 14:28:07,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1143 transitions, 18839 flow. Second operand has 29 states, 29 states have (on average 8.275862068965518) internal successors, (240), 29 states have internal predecessors, (240), 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 14:28:07,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:07,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2025-03-17 14:28:07,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:20,171 INFO L124 PetriNetUnfolderBase]: 11089/18759 cut-off events. [2025-03-17 14:28:20,172 INFO L125 PetriNetUnfolderBase]: For 360756/360756 co-relation queries the response was YES. [2025-03-17 14:28:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144012 conditions, 18759 events. 11089/18759 cut-off events. For 360756/360756 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 136620 event pairs, 160 based on Foata normal form. 22/18780 useless extension candidates. Maximal degree in co-relation 143794. Up to 3978 conditions per place. [2025-03-17 14:28:20,446 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 924 selfloop transitions, 1593 changer transitions 99/2619 dead transitions. [2025-03-17 14:28:20,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 2619 transitions, 47432 flow [2025-03-17 14:28:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2025-03-17 14:28:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2025-03-17 14:28:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 1301 transitions. [2025-03-17 14:28:20,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3949605343047966 [2025-03-17 14:28:20,450 INFO L175 Difference]: Start difference. First operand has 287 places, 1143 transitions, 18839 flow. Second operand 122 states and 1301 transitions. [2025-03-17 14:28:20,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 2619 transitions, 47432 flow [2025-03-17 14:28:23,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 2619 transitions, 46606 flow, removed 355 selfloop flow, removed 17 redundant places. [2025-03-17 14:28:23,387 INFO L231 Difference]: Finished difference. Result has 452 places, 2034 transitions, 39398 flow [2025-03-17 14:28:23,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18483, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=39398, PETRI_PLACES=452, PETRI_TRANSITIONS=2034} [2025-03-17 14:28:23,389 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 423 predicate places. [2025-03-17 14:28:23,389 INFO L471 AbstractCegarLoop]: Abstraction has has 452 places, 2034 transitions, 39398 flow [2025-03-17 14:28:23,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.275862068965518) internal successors, (240), 29 states have internal predecessors, (240), 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 14:28:23,389 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:23,389 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:23,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:28:23,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-17 14:28:23,590 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:28:23,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash -512883803, now seen corresponding path program 5 times [2025-03-17 14:28:23,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:23,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418971609] [2025-03-17 14:28:23,591 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:28:23,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:23,597 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:28:23,609 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:28:23,610 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:28:23,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:28:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418971609] [2025-03-17 14:28:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418971609] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885922242] [2025-03-17 14:28:24,148 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:28:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:24,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:28:24,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:28:24,182 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 14:28:24,205 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:28:24,205 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:28:24,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:24,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:28:24,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:28:40,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:28:41,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885922242] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:41,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:41,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2025-03-17 14:28:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131860373] [2025-03-17 14:28:41,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:41,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 14:28:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:41,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 14:28:41,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=551, Unknown=4, NotChecked=0, Total=702 [2025-03-17 14:28:41,965 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2025-03-17 14:28:41,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 2034 transitions, 39398 flow. Second operand has 27 states, 27 states have (on average 9.555555555555555) internal successors, (258), 27 states have internal predecessors, (258), 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 14:28:41,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:41,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2025-03-17 14:28:41,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:47,776 WARN L286 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 39 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)