/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 01:20:53,829 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 01:20:53,891 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-14 01:20:53,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 01:20:53,897 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 01:20:53,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 01:20:53,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 01:20:53,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 01:20:53,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 01:20:53,919 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 01:20:53,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 01:20:53,920 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 01:20:53,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 01:20:53,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 01:20:53,920 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 01:20:53,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 01:20:53,921 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 01:20:53,921 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:20:53,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:20:53,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 01:20:53,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 01:20:53,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 01:20:53,923 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 01:20:53,923 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 01:20:53,923 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 01:20:54,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 01:20:54,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 01:20:54,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 01:20:54,168 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 01:20:54,169 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 01:20:54,170 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2025-04-14 01:20:55,445 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1c97e5a/965015d5d107436fba04f1700febf476/FLAGcf55a8dda [2025-04-14 01:20:55,644 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 01:20:55,645 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2025-04-14 01:20:55,657 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1c97e5a/965015d5d107436fba04f1700febf476/FLAGcf55a8dda [2025-04-14 01:20:56,496 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1c97e5a/965015d5d107436fba04f1700febf476 [2025-04-14 01:20:56,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 01:20:56,502 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 01:20:56,504 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 01:20:56,504 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 01:20:56,507 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 01:20:56,507 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,508 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f5fee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56, skipping insertion in model container [2025-04-14 01:20:56,508 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,523 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 01:20:56,705 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2025-04-14 01:20:56,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:20:56,727 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 01:20:56,759 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2025-04-14 01:20:56,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:20:56,774 INFO L204 MainTranslator]: Completed translation [2025-04-14 01:20:56,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56 WrapperNode [2025-04-14 01:20:56,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 01:20:56,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 01:20:56,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 01:20:56,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 01:20:56,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,811 INFO L138 Inliner]: procedures = 24, calls = 19, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 84 [2025-04-14 01:20:56,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 01:20:56,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 01:20:56,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 01:20:56,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 01:20:56,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,823 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,837 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-04-14 01:20:56,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,841 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,845 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,846 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,851 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 01:20:56,852 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 01:20:56,852 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 01:20:56,852 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 01:20:56,853 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (1/1) ... [2025-04-14 01:20:56,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:20:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:20:56,876 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) [2025-04-14 01:20:56,879 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 [2025-04-14 01:20:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 01:20:56,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 01:20:56,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-14 01:20:56,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 01:20:56,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 01:20:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-14 01:20:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-14 01:20:56,899 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 01:20:56,974 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 01:20:56,975 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 01:20:57,160 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 01:20:57,161 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 01:20:57,161 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 01:20:57,349 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 01:20:57,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:20:57 BoogieIcfgContainer [2025-04-14 01:20:57,353 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 01:20:57,355 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 01:20:57,355 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 01:20:57,358 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 01:20:57,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 01:20:56" (1/3) ... [2025-04-14 01:20:57,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4ed94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:20:57, skipping insertion in model container [2025-04-14 01:20:57,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:20:56" (2/3) ... [2025-04-14 01:20:57,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4ed94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:20:57, skipping insertion in model container [2025-04-14 01:20:57,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:20:57" (3/3) ... [2025-04-14 01:20:57,360 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2025-04-14 01:20:57,370 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 01:20:57,371 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sum-array-hom.wvr.c that has 4 procedures, 23 locations, 23 edges, 1 initial locations, 4 loop locations, and 1 error locations. [2025-04-14 01:20:57,372 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 01:20:57,410 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-14 01:20:57,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 26 transitions, 73 flow [2025-04-14 01:20:57,465 INFO L116 PetriNetUnfolderBase]: 4/23 cut-off events. [2025-04-14 01:20:57,469 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 01:20:57,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 23 events. 4/23 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-04-14 01:20:57,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 26 transitions, 73 flow [2025-04-14 01:20:57,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 22 transitions, 62 flow [2025-04-14 01:20:57,487 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:20:57,524 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5cd1a076, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:20:57,524 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-14 01:20:57,538 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:20:57,538 INFO L116 PetriNetUnfolderBase]: 4/21 cut-off events. [2025-04-14 01:20:57,538 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 01:20:57,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:20:57,539 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:20:57,539 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:20:57,543 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:20:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash 807095281, now seen corresponding path program 1 times [2025-04-14 01:20:57,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:20:57,551 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267250] [2025-04-14 01:20:57,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:20:57,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:20:57,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:20:57,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:20:57,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:20:57,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:20:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:20:58,106 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267250] [2025-04-14 01:20:58,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267250] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:20:58,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:20:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 01:20:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550203809] [2025-04-14 01:20:58,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:20:58,113 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:20:58,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:20:58,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:20:58,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:20:58,134 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:20:58,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2025-04-14 01:20:58,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:20:58,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:20:58,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:20:58,328 INFO L116 PetriNetUnfolderBase]: 387/566 cut-off events. [2025-04-14 01:20:58,328 INFO L117 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2025-04-14 01:20:58,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 566 events. 387/566 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1771 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2025-04-14 01:20:58,333 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 34 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2025-04-14 01:20:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 189 flow [2025-04-14 01:20:58,334 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:20:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:20:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-04-14 01:20:58,345 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2025-04-14 01:20:58,346 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 62 flow. Second operand 3 states and 49 transitions. [2025-04-14 01:20:58,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 189 flow [2025-04-14 01:20:58,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 39 transitions, 167 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-14 01:20:58,354 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 76 flow [2025-04-14 01:20:58,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2025-04-14 01:20:58,358 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2025-04-14 01:20:58,359 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 76 flow [2025-04-14 01:20:58,359 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2025-04-14 01:20:58,359 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:20:58,359 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:20:58,359 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 01:20:58,359 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:20:58,360 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:20:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1668840966, now seen corresponding path program 1 times [2025-04-14 01:20:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:20:58,360 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515212387] [2025-04-14 01:20:58,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:20:58,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:20:58,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 01:20:58,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:20:58,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:20:58,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:20:58,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:20:58,474 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515212387] [2025-04-14 01:20:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515212387] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:20:58,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:20:58,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:20:58,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775398960] [2025-04-14 01:20:58,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:20:58,475 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:20:58,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:20:58,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:20:58,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:20:58,475 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:20:58,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2025-04-14 01:20:58,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:20:58,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:20:58,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:20:58,654 INFO L116 PetriNetUnfolderBase]: 721/1075 cut-off events. [2025-04-14 01:20:58,655 INFO L117 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2025-04-14 01:20:58,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 1075 events. 721/1075 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3906 event pairs, 417 based on Foata normal form. 42/1115 useless extension candidates. Maximal degree in co-relation 894. Up to 567 conditions per place. [2025-04-14 01:20:58,664 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 53 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2025-04-14 01:20:58,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 58 transitions, 288 flow [2025-04-14 01:20:58,665 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:20:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:20:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2025-04-14 01:20:58,666 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2025-04-14 01:20:58,666 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 76 flow. Second operand 5 states and 67 transitions. [2025-04-14 01:20:58,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 58 transitions, 288 flow [2025-04-14 01:20:58,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 58 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:20:58,668 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 110 flow [2025-04-14 01:20:58,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-04-14 01:20:58,669 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2025-04-14 01:20:58,669 INFO L485 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 110 flow [2025-04-14 01:20:58,669 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2025-04-14 01:20:58,669 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:20:58,669 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:20:58,670 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 01:20:58,670 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:20:58,672 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:20:58,672 INFO L85 PathProgramCache]: Analyzing trace with hash 651533600, now seen corresponding path program 1 times [2025-04-14 01:20:58,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:20:58,673 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059976948] [2025-04-14 01:20:58,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:20:58,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:20:58,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 01:20:58,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:20:58,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:20:58,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:20:58,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:20:58,786 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059976948] [2025-04-14 01:20:58,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059976948] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:20:58,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:20:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:20:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121793346] [2025-04-14 01:20:58,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:20:58,787 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:20:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:20:58,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:20:58,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:20:58,788 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:20:58,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2025-04-14 01:20:58,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:20:58,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:20:58,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:20:58,954 INFO L116 PetriNetUnfolderBase]: 636/967 cut-off events. [2025-04-14 01:20:58,954 INFO L117 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2025-04-14 01:20:58,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 967 events. 636/967 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3626 event pairs, 391 based on Foata normal form. 42/1008 useless extension candidates. Maximal degree in co-relation 1436. Up to 567 conditions per place. [2025-04-14 01:20:58,963 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 51 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2025-04-14 01:20:58,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 302 flow [2025-04-14 01:20:58,964 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:20:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:20:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2025-04-14 01:20:58,964 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2025-04-14 01:20:58,964 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 110 flow. Second operand 5 states and 67 transitions. [2025-04-14 01:20:58,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 302 flow [2025-04-14 01:20:58,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 298 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 01:20:58,967 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 133 flow [2025-04-14 01:20:58,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2025-04-14 01:20:58,967 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2025-04-14 01:20:58,967 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 133 flow [2025-04-14 01:20:58,968 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2025-04-14 01:20:58,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:20:58,968 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:20:58,968 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-14 01:20:58,968 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:20:58,968 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:20:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1314614549, now seen corresponding path program 1 times [2025-04-14 01:20:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:20:58,968 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289510354] [2025-04-14 01:20:58,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:20:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:20:58,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 01:20:58,986 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:20:58,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:20:58,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:20:59,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:20:59,065 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289510354] [2025-04-14 01:20:59,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289510354] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:20:59,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:20:59,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:20:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013543496] [2025-04-14 01:20:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:20:59,066 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:20:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:20:59,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:20:59,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:20:59,066 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:20:59,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2025-04-14 01:20:59,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:20:59,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:20:59,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:20:59,204 INFO L116 PetriNetUnfolderBase]: 511/783 cut-off events. [2025-04-14 01:20:59,204 INFO L117 PetriNetUnfolderBase]: For 677/677 co-relation queries the response was YES. [2025-04-14 01:20:59,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 783 events. 511/783 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2738 event pairs, 324 based on Foata normal form. 27/809 useless extension candidates. Maximal degree in co-relation 1586. Up to 567 conditions per place. [2025-04-14 01:20:59,208 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 24 selfloop transitions, 2 changer transitions 24/50 dead transitions. [2025-04-14 01:20:59,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 295 flow [2025-04-14 01:20:59,209 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:20:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:20:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2025-04-14 01:20:59,211 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2025-04-14 01:20:59,211 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 133 flow. Second operand 5 states and 63 transitions. [2025-04-14 01:20:59,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 295 flow [2025-04-14 01:20:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-14 01:20:59,214 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 106 flow [2025-04-14 01:20:59,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2025-04-14 01:20:59,214 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2025-04-14 01:20:59,214 INFO L485 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 106 flow [2025-04-14 01:20:59,214 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2025-04-14 01:20:59,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:20:59,215 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] [2025-04-14 01:20:59,215 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 01:20:59,215 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:20:59,215 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:20:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash -718259609, now seen corresponding path program 1 times [2025-04-14 01:20:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:20:59,215 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172556490] [2025-04-14 01:20:59,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:20:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:20:59,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:20:59,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:20:59,231 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:20:59,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:20:59,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:20:59,329 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172556490] [2025-04-14 01:20:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172556490] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:20:59,329 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384844886] [2025-04-14 01:20:59,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:20:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:20:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:20:59,333 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) [2025-04-14 01:20:59,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-14 01:20:59,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:20:59,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:20:59,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:20:59,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:59,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:20:59,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:20:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:20:59,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:20:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:20:59,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384844886] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:20:59,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:20:59,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-04-14 01:20:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334429942] [2025-04-14 01:20:59,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:20:59,572 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:20:59,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:20:59,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:20:59,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:20:59,572 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:20:59,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:20:59,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:20:59,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:20:59,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:20:59,764 INFO L116 PetriNetUnfolderBase]: 517/762 cut-off events. [2025-04-14 01:20:59,765 INFO L117 PetriNetUnfolderBase]: For 727/727 co-relation queries the response was YES. [2025-04-14 01:20:59,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 762 events. 517/762 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2637 event pairs, 150 based on Foata normal form. 14/775 useless extension candidates. Maximal degree in co-relation 2312. Up to 379 conditions per place. [2025-04-14 01:20:59,770 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 55 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2025-04-14 01:20:59,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 64 transitions, 392 flow [2025-04-14 01:20:59,771 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:20:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:20:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2025-04-14 01:20:59,773 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2025-04-14 01:20:59,773 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 106 flow. Second operand 7 states and 77 transitions. [2025-04-14 01:20:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 64 transitions, 392 flow [2025-04-14 01:20:59,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 64 transitions, 320 flow, removed 34 selfloop flow, removed 8 redundant places. [2025-04-14 01:20:59,779 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 137 flow [2025-04-14 01:20:59,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=137, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2025-04-14 01:20:59,781 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2025-04-14 01:20:59,781 INFO L485 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 137 flow [2025-04-14 01:20:59,781 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:20:59,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:20:59,781 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] [2025-04-14 01:20:59,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-14 01:20:59,983 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:20:59,983 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:20:59,983 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:20:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1307929435, now seen corresponding path program 2 times [2025-04-14 01:20:59,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:20:59,983 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995160720] [2025-04-14 01:20:59,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:20:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:20:59,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:00,006 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:00,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:00,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:00,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:00,082 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995160720] [2025-04-14 01:21:00,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995160720] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:00,082 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673976704] [2025-04-14 01:21:00,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:21:00,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:00,084 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) [2025-04-14 01:21:00,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-14 01:21:00,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:00,153 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:00,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:00,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:00,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:21:00,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:00,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:00,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673976704] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:00,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:21:00,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-04-14 01:21:00,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155470204] [2025-04-14 01:21:00,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:21:00,294 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:21:00,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:00,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:21:00,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:21:00,295 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:00,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 137 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:00,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:00,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:00,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:00,471 INFO L116 PetriNetUnfolderBase]: 678/1001 cut-off events. [2025-04-14 01:21:00,471 INFO L117 PetriNetUnfolderBase]: For 907/907 co-relation queries the response was YES. [2025-04-14 01:21:00,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3041 conditions, 1001 events. 678/1001 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3613 event pairs, 240 based on Foata normal form. 12/1012 useless extension candidates. Maximal degree in co-relation 3019. Up to 593 conditions per place. [2025-04-14 01:21:00,476 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 57 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2025-04-14 01:21:00,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 433 flow [2025-04-14 01:21:00,476 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:21:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:21:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2025-04-14 01:21:00,478 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4010989010989011 [2025-04-14 01:21:00,478 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 137 flow. Second operand 7 states and 73 transitions. [2025-04-14 01:21:00,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 433 flow [2025-04-14 01:21:00,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 69 transitions, 398 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-04-14 01:21:00,482 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 194 flow [2025-04-14 01:21:00,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2025-04-14 01:21:00,483 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2025-04-14 01:21:00,483 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 194 flow [2025-04-14 01:21:00,484 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:00,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:00,484 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] [2025-04-14 01:21:00,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-14 01:21:00,688 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-14 01:21:00,688 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:00,688 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2069074819, now seen corresponding path program 3 times [2025-04-14 01:21:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:00,689 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207310385] [2025-04-14 01:21:00,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:00,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:00,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:00,707 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:00,708 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:00,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:00,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:00,778 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207310385] [2025-04-14 01:21:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207310385] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:00,778 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552694544] [2025-04-14 01:21:00,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:00,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:00,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:00,781 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) [2025-04-14 01:21:00,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-14 01:21:00,823 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:00,839 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:00,839 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:00,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:00,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:21:00,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:00,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552694544] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:00,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:21:00,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-04-14 01:21:00,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320136025] [2025-04-14 01:21:00,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:21:00,966 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:21:00,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:00,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:21:00,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:21:00,967 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:00,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:00,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:00,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:00,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:01,149 INFO L116 PetriNetUnfolderBase]: 784/1162 cut-off events. [2025-04-14 01:21:01,150 INFO L117 PetriNetUnfolderBase]: For 1917/1917 co-relation queries the response was YES. [2025-04-14 01:21:01,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 1162 events. 784/1162 cut-off events. For 1917/1917 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4395 event pairs, 319 based on Foata normal form. 14/1175 useless extension candidates. Maximal degree in co-relation 4043. Up to 820 conditions per place. [2025-04-14 01:21:01,159 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 56 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2025-04-14 01:21:01,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 73 transitions, 517 flow [2025-04-14 01:21:01,159 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:21:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:21:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2025-04-14 01:21:01,160 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2025-04-14 01:21:01,160 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 194 flow. Second operand 7 states and 75 transitions. [2025-04-14 01:21:01,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 73 transitions, 517 flow [2025-04-14 01:21:01,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 73 transitions, 476 flow, removed 12 selfloop flow, removed 3 redundant places. [2025-04-14 01:21:01,165 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 291 flow [2025-04-14 01:21:01,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2025-04-14 01:21:01,167 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2025-04-14 01:21:01,167 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 291 flow [2025-04-14 01:21:01,167 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:01,167 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:01,167 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] [2025-04-14 01:21:01,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-14 01:21:01,368 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:01,368 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:01,368 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash 951498443, now seen corresponding path program 4 times [2025-04-14 01:21:01,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:01,369 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364194072] [2025-04-14 01:21:01,369 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:01,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:01,374 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:01,376 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 17 of 20 statements. [2025-04-14 01:21:01,376 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:21:01,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:01,421 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364194072] [2025-04-14 01:21:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364194072] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:01,421 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937692662] [2025-04-14 01:21:01,421 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:01,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:01,424 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) [2025-04-14 01:21:01,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-14 01:21:01,466 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:01,477 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 17 of 20 statements. [2025-04-14 01:21:01,478 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:21:01,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:01,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:21:01,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:01,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937692662] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:01,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-04-14 01:21:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307209975] [2025-04-14 01:21:01,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:01,581 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:21:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:01,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:21:01,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:21:01,582 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:01,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 291 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:21:01,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:01,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:01,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:02,105 INFO L116 PetriNetUnfolderBase]: 1176/1748 cut-off events. [2025-04-14 01:21:02,105 INFO L117 PetriNetUnfolderBase]: For 5250/5250 co-relation queries the response was YES. [2025-04-14 01:21:02,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6722 conditions, 1748 events. 1176/1748 cut-off events. For 5250/5250 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7576 event pairs, 250 based on Foata normal form. 6/1753 useless extension candidates. Maximal degree in co-relation 6694. Up to 615 conditions per place. [2025-04-14 01:21:02,135 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 156 selfloop transitions, 47 changer transitions 0/203 dead transitions. [2025-04-14 01:21:02,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 203 transitions, 1743 flow [2025-04-14 01:21:02,136 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 01:21:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 01:21:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 182 transitions. [2025-04-14 01:21:02,137 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-04-14 01:21:02,137 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 291 flow. Second operand 17 states and 182 transitions. [2025-04-14 01:21:02,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 203 transitions, 1743 flow [2025-04-14 01:21:02,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 203 transitions, 1585 flow, removed 26 selfloop flow, removed 4 redundant places. [2025-04-14 01:21:02,144 INFO L231 Difference]: Finished difference. Result has 72 places, 91 transitions, 868 flow [2025-04-14 01:21:02,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=868, PETRI_PLACES=72, PETRI_TRANSITIONS=91} [2025-04-14 01:21:02,145 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2025-04-14 01:21:02,145 INFO L485 AbstractCegarLoop]: Abstraction has has 72 places, 91 transitions, 868 flow [2025-04-14 01:21:02,145 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:21:02,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:02,145 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] [2025-04-14 01:21:02,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-14 01:21:02,346 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:02,346 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:02,346 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:02,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1036297006, now seen corresponding path program 1 times [2025-04-14 01:21:02,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:02,346 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698323310] [2025-04-14 01:21:02,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:21:02,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:02,352 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:21:02,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:02,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:02,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:02,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:02,403 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698323310] [2025-04-14 01:21:02,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698323310] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:02,403 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752203847] [2025-04-14 01:21:02,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:21:02,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:02,405 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) [2025-04-14 01:21:02,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-14 01:21:02,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:21:02,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:02,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:02,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:02,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:21:02,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:02,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:02,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752203847] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:02,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:21:02,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-04-14 01:21:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735606798] [2025-04-14 01:21:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:21:02,525 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:21:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:02,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:21:02,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-04-14 01:21:02,526 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:02,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 91 transitions, 868 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-04-14 01:21:02,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:02,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:02,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:02,683 INFO L116 PetriNetUnfolderBase]: 934/1380 cut-off events. [2025-04-14 01:21:02,683 INFO L117 PetriNetUnfolderBase]: For 9252/9252 co-relation queries the response was YES. [2025-04-14 01:21:02,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6763 conditions, 1380 events. 934/1380 cut-off events. For 9252/9252 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5516 event pairs, 366 based on Foata normal form. 74/1453 useless extension candidates. Maximal degree in co-relation 6724. Up to 1134 conditions per place. [2025-04-14 01:21:02,693 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 110 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2025-04-14 01:21:02,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 115 transitions, 1303 flow [2025-04-14 01:21:02,694 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:21:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:21:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2025-04-14 01:21:02,694 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2025-04-14 01:21:02,694 INFO L175 Difference]: Start difference. First operand has 72 places, 91 transitions, 868 flow. Second operand 5 states and 51 transitions. [2025-04-14 01:21:02,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 115 transitions, 1303 flow [2025-04-14 01:21:02,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 1243 flow, removed 30 selfloop flow, removed 0 redundant places. [2025-04-14 01:21:02,710 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 813 flow [2025-04-14 01:21:02,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=813, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2025-04-14 01:21:02,710 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2025-04-14 01:21:02,710 INFO L485 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 813 flow [2025-04-14 01:21:02,710 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-04-14 01:21:02,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:02,710 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] [2025-04-14 01:21:02,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-14 01:21:02,915 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:02,915 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:02,915 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash 45080931, now seen corresponding path program 5 times [2025-04-14 01:21:02,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:02,916 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097799274] [2025-04-14 01:21:02,916 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:21:02,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:02,923 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:02,928 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:02,928 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:02,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:03,013 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097799274] [2025-04-14 01:21:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097799274] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:03,013 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81256531] [2025-04-14 01:21:03,013 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:21:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:03,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:03,017 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) [2025-04-14 01:21:03,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-14 01:21:03,054 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:03,068 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:03,068 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:03,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:03,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:21:03,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:03,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:03,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81256531] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:03,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:03,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-04-14 01:21:03,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243247584] [2025-04-14 01:21:03,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:03,205 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:21:03,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:03,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:21:03,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:21:03,206 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:03,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 813 flow. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2025-04-14 01:21:03,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:03,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:03,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:03,716 INFO L116 PetriNetUnfolderBase]: 1168/1742 cut-off events. [2025-04-14 01:21:03,716 INFO L117 PetriNetUnfolderBase]: For 12483/12483 co-relation queries the response was YES. [2025-04-14 01:21:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8643 conditions, 1742 events. 1168/1742 cut-off events. For 12483/12483 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7314 event pairs, 237 based on Foata normal form. 14/1755 useless extension candidates. Maximal degree in co-relation 8601. Up to 754 conditions per place. [2025-04-14 01:21:03,727 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 115 selfloop transitions, 122 changer transitions 0/237 dead transitions. [2025-04-14 01:21:03,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 237 transitions, 2405 flow [2025-04-14 01:21:03,728 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:21:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:21:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 178 transitions. [2025-04-14 01:21:03,729 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2025-04-14 01:21:03,729 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 813 flow. Second operand 18 states and 178 transitions. [2025-04-14 01:21:03,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 237 transitions, 2405 flow [2025-04-14 01:21:03,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 237 transitions, 2355 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-14 01:21:03,761 INFO L231 Difference]: Finished difference. Result has 93 places, 155 transitions, 1883 flow [2025-04-14 01:21:03,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1883, PETRI_PLACES=93, PETRI_TRANSITIONS=155} [2025-04-14 01:21:03,761 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2025-04-14 01:21:03,761 INFO L485 AbstractCegarLoop]: Abstraction has has 93 places, 155 transitions, 1883 flow [2025-04-14 01:21:03,761 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2025-04-14 01:21:03,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:03,761 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] [2025-04-14 01:21:03,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-14 01:21:03,965 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:03,966 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:03,966 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1682453189, now seen corresponding path program 6 times [2025-04-14 01:21:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:03,966 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775964076] [2025-04-14 01:21:03,966 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:21:03,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:03,973 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:03,982 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:03,982 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:21:03,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:04,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:04,049 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775964076] [2025-04-14 01:21:04,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775964076] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:04,049 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521869452] [2025-04-14 01:21:04,049 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:21:04,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:04,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:04,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:04,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-14 01:21:04,088 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:21:04,102 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:04,103 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:21:04,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:04,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:21:04,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:04,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:04,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521869452] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:04,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:21:04,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-04-14 01:21:04,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540754315] [2025-04-14 01:21:04,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:21:04,216 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:21:04,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:04,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:21:04,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:21:04,217 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 155 transitions, 1883 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:04,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:04,441 INFO L116 PetriNetUnfolderBase]: 1144/1686 cut-off events. [2025-04-14 01:21:04,441 INFO L117 PetriNetUnfolderBase]: For 14045/14045 co-relation queries the response was YES. [2025-04-14 01:21:04,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9540 conditions, 1686 events. 1144/1686 cut-off events. For 14045/14045 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6966 event pairs, 330 based on Foata normal form. 20/1706 useless extension candidates. Maximal degree in co-relation 9493. Up to 1282 conditions per place. [2025-04-14 01:21:04,456 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 130 selfloop transitions, 66 changer transitions 0/196 dead transitions. [2025-04-14 01:21:04,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 196 transitions, 2576 flow [2025-04-14 01:21:04,456 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 01:21:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 01:21:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2025-04-14 01:21:04,457 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2025-04-14 01:21:04,457 INFO L175 Difference]: Start difference. First operand has 93 places, 155 transitions, 1883 flow. Second operand 8 states and 82 transitions. [2025-04-14 01:21:04,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 196 transitions, 2576 flow [2025-04-14 01:21:04,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 196 transitions, 2147 flow, removed 148 selfloop flow, removed 7 redundant places. [2025-04-14 01:21:04,492 INFO L231 Difference]: Finished difference. Result has 94 places, 161 transitions, 1703 flow [2025-04-14 01:21:04,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1703, PETRI_PLACES=94, PETRI_TRANSITIONS=161} [2025-04-14 01:21:04,493 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2025-04-14 01:21:04,493 INFO L485 AbstractCegarLoop]: Abstraction has has 94 places, 161 transitions, 1703 flow [2025-04-14 01:21:04,493 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:04,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:04,493 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] [2025-04-14 01:21:04,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-14 01:21:04,693 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:04,694 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:04,694 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:04,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1020503283, now seen corresponding path program 7 times [2025-04-14 01:21:04,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:04,694 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470022216] [2025-04-14 01:21:04,694 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:21:04,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:04,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:21:04,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:04,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:04,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:04,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:04,769 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470022216] [2025-04-14 01:21:04,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470022216] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:04,769 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002607671] [2025-04-14 01:21:04,769 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:21:04,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:04,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:04,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:04,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-14 01:21:04,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:21:04,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:21:04,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:04,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:04,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:21:04,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:04,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002607671] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:04,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:21:04,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-04-14 01:21:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282123220] [2025-04-14 01:21:04,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:21:04,940 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:21:04,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:04,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:21:04,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:21:04,940 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:04,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 161 transitions, 1703 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:04,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:04,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:05,148 INFO L116 PetriNetUnfolderBase]: 1120/1630 cut-off events. [2025-04-14 01:21:05,149 INFO L117 PetriNetUnfolderBase]: For 7665/7665 co-relation queries the response was YES. [2025-04-14 01:21:05,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8280 conditions, 1630 events. 1120/1630 cut-off events. For 7665/7665 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6454 event pairs, 256 based on Foata normal form. 20/1650 useless extension candidates. Maximal degree in co-relation 8234. Up to 756 conditions per place. [2025-04-14 01:21:05,177 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 88 selfloop transitions, 90 changer transitions 0/178 dead transitions. [2025-04-14 01:21:05,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 178 transitions, 2098 flow [2025-04-14 01:21:05,178 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:21:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:21:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2025-04-14 01:21:05,178 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2025-04-14 01:21:05,178 INFO L175 Difference]: Start difference. First operand has 94 places, 161 transitions, 1703 flow. Second operand 7 states and 74 transitions. [2025-04-14 01:21:05,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 178 transitions, 2098 flow [2025-04-14 01:21:05,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 178 transitions, 1956 flow, removed 14 selfloop flow, removed 6 redundant places. [2025-04-14 01:21:05,198 INFO L231 Difference]: Finished difference. Result has 90 places, 154 transitions, 1647 flow [2025-04-14 01:21:05,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=90, PETRI_TRANSITIONS=154} [2025-04-14 01:21:05,199 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2025-04-14 01:21:05,199 INFO L485 AbstractCegarLoop]: Abstraction has has 90 places, 154 transitions, 1647 flow [2025-04-14 01:21:05,199 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2025-04-14 01:21:05,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:05,199 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] [2025-04-14 01:21:05,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-14 01:21:05,400 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-04-14 01:21:05,400 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:05,400 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:05,401 INFO L85 PathProgramCache]: Analyzing trace with hash -117703592, now seen corresponding path program 1 times [2025-04-14 01:21:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:05,401 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251806211] [2025-04-14 01:21:05,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:21:05,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:05,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:21:05,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:05,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:05,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:05,896 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251806211] [2025-04-14 01:21:05,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251806211] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:05,896 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792072634] [2025-04-14 01:21:05,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:21:05,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:05,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:05,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:05,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-14 01:21:05,936 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:21:05,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:05,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:05,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:05,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-04-14 01:21:05,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:05,998 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:06,117 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:06,117 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-04-14 01:21:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:06,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792072634] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:06,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:06,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 21 [2025-04-14 01:21:06,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172902986] [2025-04-14 01:21:06,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:06,418 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 01:21:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:06,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 01:21:06,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2025-04-14 01:21:06,419 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:06,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 154 transitions, 1647 flow. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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) [2025-04-14 01:21:06,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:06,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:06,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:07,042 INFO L116 PetriNetUnfolderBase]: 1597/2338 cut-off events. [2025-04-14 01:21:07,043 INFO L117 PetriNetUnfolderBase]: For 9984/9984 co-relation queries the response was YES. [2025-04-14 01:21:07,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11910 conditions, 2338 events. 1597/2338 cut-off events. For 9984/9984 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10319 event pairs, 108 based on Foata normal form. 1/2339 useless extension candidates. Maximal degree in co-relation 11864. Up to 1689 conditions per place. [2025-04-14 01:21:07,060 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 221 selfloop transitions, 126 changer transitions 1/348 dead transitions. [2025-04-14 01:21:07,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 348 transitions, 4193 flow [2025-04-14 01:21:07,060 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:21:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:21:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2025-04-14 01:21:07,061 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43131868131868134 [2025-04-14 01:21:07,061 INFO L175 Difference]: Start difference. First operand has 90 places, 154 transitions, 1647 flow. Second operand 14 states and 157 transitions. [2025-04-14 01:21:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 348 transitions, 4193 flow [2025-04-14 01:21:07,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 348 transitions, 3826 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-04-14 01:21:07,099 INFO L231 Difference]: Finished difference. Result has 106 places, 256 transitions, 3051 flow [2025-04-14 01:21:07,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3051, PETRI_PLACES=106, PETRI_TRANSITIONS=256} [2025-04-14 01:21:07,099 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 78 predicate places. [2025-04-14 01:21:07,099 INFO L485 AbstractCegarLoop]: Abstraction has has 106 places, 256 transitions, 3051 flow [2025-04-14 01:21:07,100 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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) [2025-04-14 01:21:07,100 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:07,100 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] [2025-04-14 01:21:07,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-14 01:21:07,300 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-14 01:21:07,300 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:07,301 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1981457532, now seen corresponding path program 2 times [2025-04-14 01:21:07,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:07,301 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269670727] [2025-04-14 01:21:07,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:21:07,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:07,305 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:07,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:07,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:07,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:07,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:07,732 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269670727] [2025-04-14 01:21:07,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269670727] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:07,732 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735708373] [2025-04-14 01:21:07,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:21:07,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:07,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:07,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:07,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-14 01:21:07,776 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:07,808 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:07,808 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:07,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:07,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-14 01:21:07,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:07,841 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:08,085 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:08,085 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-04-14 01:21:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:08,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:08,646 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:08,659 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:08,659 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:09,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735708373] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:09,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:09,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2025-04-14 01:21:09,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278474127] [2025-04-14 01:21:09,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:09,392 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 01:21:09,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:09,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 01:21:09,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2025-04-14 01:21:09,395 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:09,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 256 transitions, 3051 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:09,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:09,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:09,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:10,546 INFO L116 PetriNetUnfolderBase]: 1679/2483 cut-off events. [2025-04-14 01:21:10,546 INFO L117 PetriNetUnfolderBase]: For 12925/12925 co-relation queries the response was YES. [2025-04-14 01:21:10,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13982 conditions, 2483 events. 1679/2483 cut-off events. For 12925/12925 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11235 event pairs, 238 based on Foata normal form. 1/2484 useless extension candidates. Maximal degree in co-relation 13927. Up to 2231 conditions per place. [2025-04-14 01:21:10,562 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 248 selfloop transitions, 82 changer transitions 4/334 dead transitions. [2025-04-14 01:21:10,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 334 transitions, 4299 flow [2025-04-14 01:21:10,563 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 01:21:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 01:21:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2025-04-14 01:21:10,565 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2025-04-14 01:21:10,565 INFO L175 Difference]: Start difference. First operand has 106 places, 256 transitions, 3051 flow. Second operand 15 states and 144 transitions. [2025-04-14 01:21:10,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 334 transitions, 4299 flow [2025-04-14 01:21:10,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 334 transitions, 4094 flow, removed 80 selfloop flow, removed 3 redundant places. [2025-04-14 01:21:10,616 INFO L231 Difference]: Finished difference. Result has 123 places, 285 transitions, 3445 flow [2025-04-14 01:21:10,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3445, PETRI_PLACES=123, PETRI_TRANSITIONS=285} [2025-04-14 01:21:10,618 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 95 predicate places. [2025-04-14 01:21:10,618 INFO L485 AbstractCegarLoop]: Abstraction has has 123 places, 285 transitions, 3445 flow [2025-04-14 01:21:10,618 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:10,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:10,618 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] [2025-04-14 01:21:10,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-14 01:21:10,818 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-14 01:21:10,819 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:10,819 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:10,819 INFO L85 PathProgramCache]: Analyzing trace with hash -896447289, now seen corresponding path program 1 times [2025-04-14 01:21:10,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:10,819 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065194087] [2025-04-14 01:21:10,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:21:10,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:10,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:21:10,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:10,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:10,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:11,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:11,131 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065194087] [2025-04-14 01:21:11,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065194087] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:11,132 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439115553] [2025-04-14 01:21:11,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:21:11,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:11,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:11,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-14 01:21:11,173 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:21:11,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:11,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:11,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:11,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:21:11,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:11,204 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:11,290 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:11,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:11,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439115553] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:11,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:11,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 14 [2025-04-14 01:21:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630401199] [2025-04-14 01:21:11,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:11,423 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:21:11,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:11,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:21:11,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:21:11,424 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:11,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 285 transitions, 3445 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 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) [2025-04-14 01:21:11,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:11,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:11,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:11,821 INFO L116 PetriNetUnfolderBase]: 2009/2958 cut-off events. [2025-04-14 01:21:11,821 INFO L117 PetriNetUnfolderBase]: For 15140/15140 co-relation queries the response was YES. [2025-04-14 01:21:11,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16810 conditions, 2958 events. 2009/2958 cut-off events. For 15140/15140 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13763 event pairs, 159 based on Foata normal form. 4/2962 useless extension candidates. Maximal degree in co-relation 16748. Up to 2046 conditions per place. [2025-04-14 01:21:11,843 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 268 selfloop transitions, 150 changer transitions 1/419 dead transitions. [2025-04-14 01:21:11,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 419 transitions, 5562 flow [2025-04-14 01:21:11,847 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 01:21:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 01:21:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2025-04-14 01:21:11,849 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2025-04-14 01:21:11,849 INFO L175 Difference]: Start difference. First operand has 123 places, 285 transitions, 3445 flow. Second operand 9 states and 114 transitions. [2025-04-14 01:21:11,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 419 transitions, 5562 flow [2025-04-14 01:21:11,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 419 transitions, 5484 flow, removed 20 selfloop flow, removed 3 redundant places. [2025-04-14 01:21:11,952 INFO L231 Difference]: Finished difference. Result has 131 places, 326 transitions, 4345 flow [2025-04-14 01:21:11,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4345, PETRI_PLACES=131, PETRI_TRANSITIONS=326} [2025-04-14 01:21:11,952 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 103 predicate places. [2025-04-14 01:21:11,952 INFO L485 AbstractCegarLoop]: Abstraction has has 131 places, 326 transitions, 4345 flow [2025-04-14 01:21:11,952 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 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) [2025-04-14 01:21:11,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:11,953 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] [2025-04-14 01:21:11,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-14 01:21:12,157 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-14 01:21:12,157 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:12,157 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1461732406, now seen corresponding path program 3 times [2025-04-14 01:21:12,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:12,158 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425285877] [2025-04-14 01:21:12,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:12,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:12,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:12,178 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:12,178 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:12,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:12,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:12,536 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425285877] [2025-04-14 01:21:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425285877] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:12,536 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745444405] [2025-04-14 01:21:12,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:12,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:12,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:12,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-14 01:21:12,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:12,595 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:12,595 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:12,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:12,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-14 01:21:12,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:12,623 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:12,852 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:12,852 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-04-14 01:21:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:12,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:13,385 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:13,395 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:13,396 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745444405] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:14,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2025-04-14 01:21:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345126334] [2025-04-14 01:21:14,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:14,642 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 01:21:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:14,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 01:21:14,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2025-04-14 01:21:14,643 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:14,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 326 transitions, 4345 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:14,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:14,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:14,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:15,706 INFO L116 PetriNetUnfolderBase]: 2074/3072 cut-off events. [2025-04-14 01:21:15,706 INFO L117 PetriNetUnfolderBase]: For 18945/18945 co-relation queries the response was YES. [2025-04-14 01:21:15,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18993 conditions, 3072 events. 2074/3072 cut-off events. For 18945/18945 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 14559 event pairs, 189 based on Foata normal form. 1/3073 useless extension candidates. Maximal degree in co-relation 18926. Up to 2088 conditions per place. [2025-04-14 01:21:15,730 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 290 selfloop transitions, 169 changer transitions 5/464 dead transitions. [2025-04-14 01:21:15,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 464 transitions, 6446 flow [2025-04-14 01:21:15,733 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:21:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:21:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2025-04-14 01:21:15,734 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2025-04-14 01:21:15,734 INFO L175 Difference]: Start difference. First operand has 131 places, 326 transitions, 4345 flow. Second operand 14 states and 163 transitions. [2025-04-14 01:21:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 464 transitions, 6446 flow [2025-04-14 01:21:15,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 464 transitions, 6197 flow, removed 38 selfloop flow, removed 5 redundant places. [2025-04-14 01:21:15,839 INFO L231 Difference]: Finished difference. Result has 143 places, 345 transitions, 4742 flow [2025-04-14 01:21:15,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4106, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4742, PETRI_PLACES=143, PETRI_TRANSITIONS=345} [2025-04-14 01:21:15,841 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2025-04-14 01:21:15,842 INFO L485 AbstractCegarLoop]: Abstraction has has 143 places, 345 transitions, 4742 flow [2025-04-14 01:21:15,842 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:15,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:15,842 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] [2025-04-14 01:21:15,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-14 01:21:16,043 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-14 01:21:16,043 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:16,043 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:16,043 INFO L85 PathProgramCache]: Analyzing trace with hash -942087626, now seen corresponding path program 4 times [2025-04-14 01:21:16,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:16,044 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855591872] [2025-04-14 01:21:16,044 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:16,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:16,048 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:16,054 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:16,054 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:21:16,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:16,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:16,293 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855591872] [2025-04-14 01:21:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855591872] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:16,293 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798437887] [2025-04-14 01:21:16,293 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:16,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:16,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:16,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:16,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-14 01:21:16,336 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:16,352 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:16,352 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:21:16,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:16,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-04-14 01:21:16,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:16,388 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:16,609 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:16,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:16,866 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:16,873 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:16,873 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798437887] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:17,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:17,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-04-14 01:21:17,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808742739] [2025-04-14 01:21:17,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:17,553 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 01:21:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:17,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 01:21:17,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2025-04-14 01:21:17,554 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:17,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 345 transitions, 4742 flow. Second operand has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:21:17,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:17,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:17,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:18,881 INFO L116 PetriNetUnfolderBase]: 3116/4637 cut-off events. [2025-04-14 01:21:18,881 INFO L117 PetriNetUnfolderBase]: For 30787/30787 co-relation queries the response was YES. [2025-04-14 01:21:18,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29684 conditions, 4637 events. 3116/4637 cut-off events. For 30787/30787 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23768 event pairs, 275 based on Foata normal form. 4/4641 useless extension candidates. Maximal degree in co-relation 29513. Up to 2885 conditions per place. [2025-04-14 01:21:18,914 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 397 selfloop transitions, 360 changer transitions 5/762 dead transitions. [2025-04-14 01:21:18,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 762 transitions, 10994 flow [2025-04-14 01:21:18,914 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 01:21:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 01:21:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 305 transitions. [2025-04-14 01:21:18,915 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2025-04-14 01:21:18,915 INFO L175 Difference]: Start difference. First operand has 143 places, 345 transitions, 4742 flow. Second operand 25 states and 305 transitions. [2025-04-14 01:21:18,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 762 transitions, 10994 flow [2025-04-14 01:21:19,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 762 transitions, 10493 flow, removed 45 selfloop flow, removed 7 redundant places. [2025-04-14 01:21:19,101 INFO L231 Difference]: Finished difference. Result has 170 places, 555 transitions, 8340 flow [2025-04-14 01:21:19,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8340, PETRI_PLACES=170, PETRI_TRANSITIONS=555} [2025-04-14 01:21:19,101 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 142 predicate places. [2025-04-14 01:21:19,101 INFO L485 AbstractCegarLoop]: Abstraction has has 170 places, 555 transitions, 8340 flow [2025-04-14 01:21:19,101 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:21:19,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:19,102 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] [2025-04-14 01:21:19,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-14 01:21:19,302 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-14 01:21:19,302 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:19,303 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1681103756, now seen corresponding path program 5 times [2025-04-14 01:21:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:19,303 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849859516] [2025-04-14 01:21:19,303 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:21:19,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:19,308 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:19,319 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:19,319 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:19,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:19,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:19,626 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849859516] [2025-04-14 01:21:19,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849859516] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:19,626 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304699977] [2025-04-14 01:21:19,626 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:21:19,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:19,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:19,628 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:19,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-14 01:21:19,667 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:19,688 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:19,689 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:19,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:19,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-04-14 01:21:19,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:19,716 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:19,880 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:19,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:20,123 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:20,131 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:20,131 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:20,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304699977] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:20,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:20,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-04-14 01:21:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889254171] [2025-04-14 01:21:20,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:20,731 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 01:21:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:20,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 01:21:20,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2025-04-14 01:21:20,731 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:20,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 555 transitions, 8340 flow. Second operand has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:21:20,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:20,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:20,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:22,127 INFO L116 PetriNetUnfolderBase]: 3678/5443 cut-off events. [2025-04-14 01:21:22,128 INFO L117 PetriNetUnfolderBase]: For 41958/41958 co-relation queries the response was YES. [2025-04-14 01:21:22,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36836 conditions, 5443 events. 3678/5443 cut-off events. For 41958/41958 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28467 event pairs, 430 based on Foata normal form. 4/5447 useless extension candidates. Maximal degree in co-relation 36627. Up to 4386 conditions per place. [2025-04-14 01:21:22,181 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 567 selfloop transitions, 235 changer transitions 5/807 dead transitions. [2025-04-14 01:21:22,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 807 transitions, 12868 flow [2025-04-14 01:21:22,181 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 01:21:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 01:21:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 278 transitions. [2025-04-14 01:21:22,183 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2025-04-14 01:21:22,184 INFO L175 Difference]: Start difference. First operand has 170 places, 555 transitions, 8340 flow. Second operand 24 states and 278 transitions. [2025-04-14 01:21:22,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 807 transitions, 12868 flow [2025-04-14 01:21:22,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 807 transitions, 12705 flow, removed 28 selfloop flow, removed 3 redundant places. [2025-04-14 01:21:22,513 INFO L231 Difference]: Finished difference. Result has 204 places, 680 transitions, 10770 flow [2025-04-14 01:21:22,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10770, PETRI_PLACES=204, PETRI_TRANSITIONS=680} [2025-04-14 01:21:22,514 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 176 predicate places. [2025-04-14 01:21:22,514 INFO L485 AbstractCegarLoop]: Abstraction has has 204 places, 680 transitions, 10770 flow [2025-04-14 01:21:22,514 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:21:22,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:22,515 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] [2025-04-14 01:21:22,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-14 01:21:22,715 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:22,715 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:22,716 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 861331857, now seen corresponding path program 2 times [2025-04-14 01:21:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:22,716 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197361045] [2025-04-14 01:21:22,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:21:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:22,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:22,736 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:22,736 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:22,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:23,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:23,036 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197361045] [2025-04-14 01:21:23,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197361045] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:23,036 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979363236] [2025-04-14 01:21:23,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:21:23,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:23,038 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:23,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-14 01:21:23,076 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:23,092 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:23,092 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:23,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:23,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-14 01:21:23,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:23,176 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:23,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:23,239 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:23,239 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2025-04-14 01:21:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:23,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979363236] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:23,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:23,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 13 [2025-04-14 01:21:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979739602] [2025-04-14 01:21:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:23,543 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:21:23,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:23,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:21:23,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:21:23,544 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:23,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 680 transitions, 10770 flow. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2025-04-14 01:21:23,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:23,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:23,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:24,443 INFO L116 PetriNetUnfolderBase]: 4009/5915 cut-off events. [2025-04-14 01:21:24,443 INFO L117 PetriNetUnfolderBase]: For 55531/55531 co-relation queries the response was YES. [2025-04-14 01:21:24,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42985 conditions, 5915 events. 4009/5915 cut-off events. For 55531/55531 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 31254 event pairs, 488 based on Foata normal form. 4/5919 useless extension candidates. Maximal degree in co-relation 42753. Up to 5277 conditions per place. [2025-04-14 01:21:24,488 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 613 selfloop transitions, 153 changer transitions 1/767 dead transitions. [2025-04-14 01:21:24,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 767 transitions, 13262 flow [2025-04-14 01:21:24,489 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 01:21:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 01:21:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2025-04-14 01:21:24,489 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2025-04-14 01:21:24,489 INFO L175 Difference]: Start difference. First operand has 204 places, 680 transitions, 10770 flow. Second operand 9 states and 106 transitions. [2025-04-14 01:21:24,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 767 transitions, 13262 flow [2025-04-14 01:21:24,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 767 transitions, 12839 flow, removed 134 selfloop flow, removed 7 redundant places. [2025-04-14 01:21:24,969 INFO L231 Difference]: Finished difference. Result has 208 places, 716 transitions, 11303 flow [2025-04-14 01:21:24,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10375, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11303, PETRI_PLACES=208, PETRI_TRANSITIONS=716} [2025-04-14 01:21:24,970 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 180 predicate places. [2025-04-14 01:21:24,970 INFO L485 AbstractCegarLoop]: Abstraction has has 208 places, 716 transitions, 11303 flow [2025-04-14 01:21:24,970 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2025-04-14 01:21:24,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:24,970 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] [2025-04-14 01:21:24,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-14 01:21:25,175 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:25,175 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:25,175 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 54221780, now seen corresponding path program 6 times [2025-04-14 01:21:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:25,176 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900185789] [2025-04-14 01:21:25,176 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:21:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:25,180 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:25,190 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:25,190 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:21:25,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:25,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:25,609 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900185789] [2025-04-14 01:21:25,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900185789] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:25,609 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457993053] [2025-04-14 01:21:25,609 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:21:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:25,611 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-14 01:21:25,661 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:25,682 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:25,682 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:21:25,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:25,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-14 01:21:25,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:25,722 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:25,939 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:25,939 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-04-14 01:21:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:25,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:26,383 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:26,391 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:26,391 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:26,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457993053] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:26,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:26,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2025-04-14 01:21:26,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101323587] [2025-04-14 01:21:26,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:26,904 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 01:21:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:26,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 01:21:26,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2025-04-14 01:21:26,905 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:26,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 716 transitions, 11303 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:26,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:26,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:26,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:28,527 INFO L116 PetriNetUnfolderBase]: 4225/6260 cut-off events. [2025-04-14 01:21:28,527 INFO L117 PetriNetUnfolderBase]: For 58831/58831 co-relation queries the response was YES. [2025-04-14 01:21:28,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45478 conditions, 6260 events. 4225/6260 cut-off events. For 58831/58831 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33689 event pairs, 546 based on Foata normal form. 1/6261 useless extension candidates. Maximal degree in co-relation 45242. Up to 5589 conditions per place. [2025-04-14 01:21:28,591 INFO L140 encePairwiseOnDemand]: 12/26 looper letters, 629 selfloop transitions, 199 changer transitions 7/835 dead transitions. [2025-04-14 01:21:28,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 835 transitions, 14168 flow [2025-04-14 01:21:28,592 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:21:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:21:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 177 transitions. [2025-04-14 01:21:28,593 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3782051282051282 [2025-04-14 01:21:28,593 INFO L175 Difference]: Start difference. First operand has 208 places, 716 transitions, 11303 flow. Second operand 18 states and 177 transitions. [2025-04-14 01:21:28,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 835 transitions, 14168 flow [2025-04-14 01:21:29,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 835 transitions, 13989 flow, removed 65 selfloop flow, removed 3 redundant places. [2025-04-14 01:21:29,193 INFO L231 Difference]: Finished difference. Result has 230 places, 771 transitions, 12537 flow [2025-04-14 01:21:29,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11182, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12537, PETRI_PLACES=230, PETRI_TRANSITIONS=771} [2025-04-14 01:21:29,194 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 202 predicate places. [2025-04-14 01:21:29,194 INFO L485 AbstractCegarLoop]: Abstraction has has 230 places, 771 transitions, 12537 flow [2025-04-14 01:21:29,194 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:29,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:29,194 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] [2025-04-14 01:21:29,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-04-14 01:21:29,394 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:29,395 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:29,395 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1879275921, now seen corresponding path program 3 times [2025-04-14 01:21:29,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:29,395 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34280253] [2025-04-14 01:21:29,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:29,400 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:29,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:29,408 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:29,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:29,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:29,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34280253] [2025-04-14 01:21:29,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34280253] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:29,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051595097] [2025-04-14 01:21:29,602 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:29,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:29,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:29,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-14 01:21:29,642 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:29,656 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:29,657 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:29,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:29,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-14 01:21:29,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:29,736 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:29,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:29,796 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:29,797 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2025-04-14 01:21:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:30,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051595097] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:30,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:30,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 13 [2025-04-14 01:21:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155635828] [2025-04-14 01:21:30,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:30,070 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:21:30,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:30,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:21:30,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:21:30,070 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:30,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 771 transitions, 12537 flow. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2025-04-14 01:21:30,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:30,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:30,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:31,183 INFO L116 PetriNetUnfolderBase]: 4686/6923 cut-off events. [2025-04-14 01:21:31,183 INFO L117 PetriNetUnfolderBase]: For 68968/68968 co-relation queries the response was YES. [2025-04-14 01:21:31,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51636 conditions, 6923 events. 4686/6923 cut-off events. For 68968/68968 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 37711 event pairs, 616 based on Foata normal form. 4/6927 useless extension candidates. Maximal degree in co-relation 51391. Up to 6040 conditions per place. [2025-04-14 01:21:31,251 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 685 selfloop transitions, 213 changer transitions 1/899 dead transitions. [2025-04-14 01:21:31,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 899 transitions, 16009 flow [2025-04-14 01:21:31,252 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 01:21:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 01:21:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2025-04-14 01:21:31,252 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2025-04-14 01:21:31,252 INFO L175 Difference]: Start difference. First operand has 230 places, 771 transitions, 12537 flow. Second operand 9 states and 108 transitions. [2025-04-14 01:21:31,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 899 transitions, 16009 flow [2025-04-14 01:21:31,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 899 transitions, 15634 flow, removed 97 selfloop flow, removed 5 redundant places. [2025-04-14 01:21:31,962 INFO L231 Difference]: Finished difference. Result has 235 places, 824 transitions, 13673 flow [2025-04-14 01:21:31,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=12162, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13673, PETRI_PLACES=235, PETRI_TRANSITIONS=824} [2025-04-14 01:21:31,962 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 207 predicate places. [2025-04-14 01:21:31,962 INFO L485 AbstractCegarLoop]: Abstraction has has 235 places, 824 transitions, 13673 flow [2025-04-14 01:21:31,963 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2025-04-14 01:21:31,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:31,963 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] [2025-04-14 01:21:31,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-04-14 01:21:32,163 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:32,163 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:32,164 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1959946392, now seen corresponding path program 7 times [2025-04-14 01:21:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:32,164 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308139530] [2025-04-14 01:21:32,164 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:21:32,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:32,167 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:21:32,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:32,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:32,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:32,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:32,422 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308139530] [2025-04-14 01:21:32,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308139530] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:32,422 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358502500] [2025-04-14 01:21:32,422 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:21:32,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:32,424 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:32,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-14 01:21:32,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:21:32,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:32,493 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:21:32,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:32,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-04-14 01:21:32,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:32,511 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:32,712 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:32,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:32,973 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:32,982 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:32,982 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358502500] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:33,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 01:21:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393647758] [2025-04-14 01:21:33,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:33,585 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:21:33,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:33,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:21:33,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:21:33,585 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:33,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 824 transitions, 13673 flow. Second operand has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 states have internal predecessors, (124), 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) [2025-04-14 01:21:33,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:33,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:35,067 INFO L116 PetriNetUnfolderBase]: 4846/7164 cut-off events. [2025-04-14 01:21:35,067 INFO L117 PetriNetUnfolderBase]: For 77958/77958 co-relation queries the response was YES. [2025-04-14 01:21:35,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54699 conditions, 7164 events. 4846/7164 cut-off events. For 77958/77958 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39284 event pairs, 704 based on Foata normal form. 2/7166 useless extension candidates. Maximal degree in co-relation 54451. Up to 6524 conditions per place. [2025-04-14 01:21:35,138 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 737 selfloop transitions, 167 changer transitions 2/906 dead transitions. [2025-04-14 01:21:35,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 906 transitions, 16399 flow [2025-04-14 01:21:35,139 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:21:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:21:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2025-04-14 01:21:35,139 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2025-04-14 01:21:35,139 INFO L175 Difference]: Start difference. First operand has 235 places, 824 transitions, 13673 flow. Second operand 12 states and 142 transitions. [2025-04-14 01:21:35,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 906 transitions, 16399 flow [2025-04-14 01:21:35,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 906 transitions, 15938 flow, removed 55 selfloop flow, removed 6 redundant places. [2025-04-14 01:21:35,891 INFO L231 Difference]: Finished difference. Result has 243 places, 836 transitions, 13820 flow [2025-04-14 01:21:35,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13228, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13820, PETRI_PLACES=243, PETRI_TRANSITIONS=836} [2025-04-14 01:21:35,892 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 215 predicate places. [2025-04-14 01:21:35,892 INFO L485 AbstractCegarLoop]: Abstraction has has 243 places, 836 transitions, 13820 flow [2025-04-14 01:21:35,892 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 states have internal predecessors, (124), 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) [2025-04-14 01:21:35,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:35,892 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] [2025-04-14 01:21:35,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-04-14 01:21:36,093 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:36,093 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:36,093 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:36,093 INFO L85 PathProgramCache]: Analyzing trace with hash 352406336, now seen corresponding path program 8 times [2025-04-14 01:21:36,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:36,094 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930323246] [2025-04-14 01:21:36,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:21:36,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:36,097 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:36,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:36,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:36,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:36,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:36,454 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930323246] [2025-04-14 01:21:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930323246] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:36,454 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669961220] [2025-04-14 01:21:36,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:21:36,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:36,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:36,457 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:36,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-14 01:21:36,497 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:36,515 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:36,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:36,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:36,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-04-14 01:21:36,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:36,539 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:36,664 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:36,664 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-04-14 01:21:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:36,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:37,047 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:37,054 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:37,054 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:38,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669961220] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:38,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:38,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2025-04-14 01:21:38,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003999820] [2025-04-14 01:21:38,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:38,371 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 01:21:38,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:38,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 01:21:38,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2025-04-14 01:21:38,371 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:38,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 836 transitions, 13820 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:38,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:38,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:38,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:42,419 INFO L116 PetriNetUnfolderBase]: 5689/8554 cut-off events. [2025-04-14 01:21:42,419 INFO L117 PetriNetUnfolderBase]: For 94213/94213 co-relation queries the response was YES. [2025-04-14 01:21:42,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63903 conditions, 8554 events. 5689/8554 cut-off events. For 94213/94213 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49996 event pairs, 658 based on Foata normal form. 4/8558 useless extension candidates. Maximal degree in co-relation 63652. Up to 6364 conditions per place. [2025-04-14 01:21:42,498 INFO L140 encePairwiseOnDemand]: 13/26 looper letters, 619 selfloop transitions, 622 changer transitions 14/1255 dead transitions. [2025-04-14 01:21:42,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1255 transitions, 21696 flow [2025-04-14 01:21:42,499 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-04-14 01:21:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-04-14 01:21:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 422 transitions. [2025-04-14 01:21:42,500 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3606837606837607 [2025-04-14 01:21:42,500 INFO L175 Difference]: Start difference. First operand has 243 places, 836 transitions, 13820 flow. Second operand 45 states and 422 transitions. [2025-04-14 01:21:42,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1255 transitions, 21696 flow [2025-04-14 01:21:43,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1255 transitions, 21509 flow, removed 23 selfloop flow, removed 7 redundant places. [2025-04-14 01:21:43,367 INFO L231 Difference]: Finished difference. Result has 296 places, 1108 transitions, 19904 flow [2025-04-14 01:21:43,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13651, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=19904, PETRI_PLACES=296, PETRI_TRANSITIONS=1108} [2025-04-14 01:21:43,369 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 268 predicate places. [2025-04-14 01:21:43,369 INFO L485 AbstractCegarLoop]: Abstraction has has 296 places, 1108 transitions, 19904 flow [2025-04-14 01:21:43,369 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:43,369 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:43,369 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] [2025-04-14 01:21:43,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-04-14 01:21:43,569 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:43,572 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:43,572 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1733716669, now seen corresponding path program 4 times [2025-04-14 01:21:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:43,572 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753821027] [2025-04-14 01:21:43,573 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:43,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:43,579 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:43,582 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:43,583 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:21:43,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:43,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:43,686 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753821027] [2025-04-14 01:21:43,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753821027] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:43,686 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402311383] [2025-04-14 01:21:43,686 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:43,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:43,690 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:43,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-04-14 01:21:43,730 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:43,744 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:43,744 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:21:43,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:43,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-14 01:21:43,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:43,830 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:43,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:43,893 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:43,893 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2025-04-14 01:21:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:44,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402311383] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:44,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:44,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 14 [2025-04-14 01:21:44,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76622380] [2025-04-14 01:21:44,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:44,095 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:21:44,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:44,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:21:44,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:21:44,095 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:44,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1108 transitions, 19904 flow. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 states have internal predecessors, (111), 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) [2025-04-14 01:21:44,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:44,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:44,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:45,866 INFO L116 PetriNetUnfolderBase]: 5893/8852 cut-off events. [2025-04-14 01:21:45,867 INFO L117 PetriNetUnfolderBase]: For 114419/114419 co-relation queries the response was YES. [2025-04-14 01:21:45,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71113 conditions, 8852 events. 5893/8852 cut-off events. For 114419/114419 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 51987 event pairs, 807 based on Foata normal form. 4/8856 useless extension candidates. Maximal degree in co-relation 70845. Up to 8202 conditions per place. [2025-04-14 01:21:45,988 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 974 selfloop transitions, 188 changer transitions 1/1163 dead transitions. [2025-04-14 01:21:45,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1163 transitions, 22869 flow [2025-04-14 01:21:45,989 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:21:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:21:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2025-04-14 01:21:45,989 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2025-04-14 01:21:45,989 INFO L175 Difference]: Start difference. First operand has 296 places, 1108 transitions, 19904 flow. Second operand 7 states and 96 transitions. [2025-04-14 01:21:45,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1163 transitions, 22869 flow [2025-04-14 01:21:47,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1163 transitions, 21113 flow, removed 864 selfloop flow, removed 3 redundant places. [2025-04-14 01:21:47,365 INFO L231 Difference]: Finished difference. Result has 301 places, 1121 transitions, 18835 flow [2025-04-14 01:21:47,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=18164, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18835, PETRI_PLACES=301, PETRI_TRANSITIONS=1121} [2025-04-14 01:21:47,366 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 273 predicate places. [2025-04-14 01:21:47,366 INFO L485 AbstractCegarLoop]: Abstraction has has 301 places, 1121 transitions, 18835 flow [2025-04-14 01:21:47,367 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 states have internal predecessors, (111), 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) [2025-04-14 01:21:47,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:47,367 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] [2025-04-14 01:21:47,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-04-14 01:21:47,567 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-04-14 01:21:47,567 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:47,568 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash -932556437, now seen corresponding path program 5 times [2025-04-14 01:21:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:47,568 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7340780] [2025-04-14 01:21:47,568 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:21:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:47,571 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:47,574 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:47,575 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:47,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:47,690 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7340780] [2025-04-14 01:21:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7340780] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:47,690 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575155341] [2025-04-14 01:21:47,690 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:21:47,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:47,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:47,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-04-14 01:21:47,737 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:47,754 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:47,754 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:21:47,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:47,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-14 01:21:47,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:47,829 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:47,847 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:47,880 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:47,880 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2025-04-14 01:21:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:48,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575155341] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:48,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:48,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 14 [2025-04-14 01:21:48,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485826081] [2025-04-14 01:21:48,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:48,102 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:21:48,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:48,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:21:48,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:21:48,102 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:48,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1121 transitions, 18835 flow. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 states have internal predecessors, (111), 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) [2025-04-14 01:21:48,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:48,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:48,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:49,946 INFO L116 PetriNetUnfolderBase]: 6042/9078 cut-off events. [2025-04-14 01:21:49,947 INFO L117 PetriNetUnfolderBase]: For 108309/108309 co-relation queries the response was YES. [2025-04-14 01:21:50,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70394 conditions, 9078 events. 6042/9078 cut-off events. For 108309/108309 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 53582 event pairs, 869 based on Foata normal form. 8/9086 useless extension candidates. Maximal degree in co-relation 70124. Up to 8044 conditions per place. [2025-04-14 01:21:50,079 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 943 selfloop transitions, 268 changer transitions 1/1212 dead transitions. [2025-04-14 01:21:50,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1212 transitions, 22415 flow [2025-04-14 01:21:50,080 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:21:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:21:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2025-04-14 01:21:50,082 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-04-14 01:21:50,082 INFO L175 Difference]: Start difference. First operand has 301 places, 1121 transitions, 18835 flow. Second operand 7 states and 98 transitions. [2025-04-14 01:21:50,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1212 transitions, 22415 flow [2025-04-14 01:21:51,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1212 transitions, 21986 flow, removed 78 selfloop flow, removed 4 redundant places. [2025-04-14 01:21:51,237 INFO L231 Difference]: Finished difference. Result has 305 places, 1144 transitions, 19561 flow [2025-04-14 01:21:51,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=18410, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=853, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19561, PETRI_PLACES=305, PETRI_TRANSITIONS=1144} [2025-04-14 01:21:51,239 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 277 predicate places. [2025-04-14 01:21:51,239 INFO L485 AbstractCegarLoop]: Abstraction has has 305 places, 1144 transitions, 19561 flow [2025-04-14 01:21:51,239 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 states have internal predecessors, (111), 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) [2025-04-14 01:21:51,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:51,240 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] [2025-04-14 01:21:51,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-04-14 01:21:51,440 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-04-14 01:21:51,440 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:51,441 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash 575903206, now seen corresponding path program 9 times [2025-04-14 01:21:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:51,441 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724943150] [2025-04-14 01:21:51,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:51,445 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:51,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:51,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:51,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:51,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:51,700 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724943150] [2025-04-14 01:21:51,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724943150] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:51,700 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388455747] [2025-04-14 01:21:51,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:21:51,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:51,702 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:51,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-04-14 01:21:51,744 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:51,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:51,763 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:21:51,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:51,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-14 01:21:51,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:51,789 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:51,970 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:51,970 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-04-14 01:21:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:52,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:52,326 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:52,332 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:52,332 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:52,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388455747] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:52,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:52,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2025-04-14 01:21:52,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091949710] [2025-04-14 01:21:52,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:52,790 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 01:21:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:52,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 01:21:52,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2025-04-14 01:21:52,791 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:52,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1144 transitions, 19561 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:52,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:52,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:52,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:21:55,509 INFO L116 PetriNetUnfolderBase]: 6269/9439 cut-off events. [2025-04-14 01:21:55,510 INFO L117 PetriNetUnfolderBase]: For 116650/116650 co-relation queries the response was YES. [2025-04-14 01:21:55,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73938 conditions, 9439 events. 6269/9439 cut-off events. For 116650/116650 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 56272 event pairs, 680 based on Foata normal form. 3/9442 useless extension candidates. Maximal degree in co-relation 73666. Up to 8520 conditions per place. [2025-04-14 01:21:55,612 INFO L140 encePairwiseOnDemand]: 12/26 looper letters, 967 selfloop transitions, 286 changer transitions 6/1259 dead transitions. [2025-04-14 01:21:55,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1259 transitions, 23352 flow [2025-04-14 01:21:55,612 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 01:21:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 01:21:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 205 transitions. [2025-04-14 01:21:55,613 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3583916083916084 [2025-04-14 01:21:55,613 INFO L175 Difference]: Start difference. First operand has 305 places, 1144 transitions, 19561 flow. Second operand 22 states and 205 transitions. [2025-04-14 01:21:55,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1259 transitions, 23352 flow [2025-04-14 01:21:56,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1259 transitions, 22666 flow, removed 145 selfloop flow, removed 4 redundant places. [2025-04-14 01:21:56,715 INFO L231 Difference]: Finished difference. Result has 331 places, 1200 transitions, 20673 flow [2025-04-14 01:21:56,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=18875, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=20673, PETRI_PLACES=331, PETRI_TRANSITIONS=1200} [2025-04-14 01:21:56,716 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 303 predicate places. [2025-04-14 01:21:56,716 INFO L485 AbstractCegarLoop]: Abstraction has has 331 places, 1200 transitions, 20673 flow [2025-04-14 01:21:56,717 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 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) [2025-04-14 01:21:56,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:21:56,717 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] [2025-04-14 01:21:56,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-04-14 01:21:56,917 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-14 01:21:56,917 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:21:56,918 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:21:56,918 INFO L85 PathProgramCache]: Analyzing trace with hash 497346454, now seen corresponding path program 10 times [2025-04-14 01:21:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:21:56,918 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491993948] [2025-04-14 01:21:56,918 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:56,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:21:56,924 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:56,928 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:56,928 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:21:56,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:21:57,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:21:57,068 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491993948] [2025-04-14 01:21:57,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491993948] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:21:57,069 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815122525] [2025-04-14 01:21:57,069 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:21:57,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:21:57,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:21:57,071 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:21:57,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-04-14 01:21:57,110 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:21:57,123 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:21:57,124 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:21:57,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:21:57,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-04-14 01:21:57,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:21:57,147 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:21:57,317 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:21:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:57,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:21:57,515 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:21:57,521 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:21:57,521 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:21:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:21:57,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815122525] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:21:57,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:21:57,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-04-14 01:21:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933766649] [2025-04-14 01:21:57,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:21:57,958 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 01:21:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:21:57,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 01:21:57,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-04-14 01:21:57,958 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:21:57,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1200 transitions, 20673 flow. Second operand has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:21:57,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:21:57,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:21:57,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:00,719 INFO L116 PetriNetUnfolderBase]: 6565/9857 cut-off events. [2025-04-14 01:22:00,719 INFO L117 PetriNetUnfolderBase]: For 131141/131141 co-relation queries the response was YES. [2025-04-14 01:22:00,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78473 conditions, 9857 events. 6565/9857 cut-off events. For 131141/131141 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 58892 event pairs, 869 based on Foata normal form. 2/9859 useless extension candidates. Maximal degree in co-relation 78192. Up to 9014 conditions per place. [2025-04-14 01:22:00,854 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 1052 selfloop transitions, 266 changer transitions 2/1320 dead transitions. [2025-04-14 01:22:00,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1320 transitions, 24876 flow [2025-04-14 01:22:00,855 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 01:22:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 01:22:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 259 transitions. [2025-04-14 01:22:00,855 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36894586894586895 [2025-04-14 01:22:00,855 INFO L175 Difference]: Start difference. First operand has 331 places, 1200 transitions, 20673 flow. Second operand 27 states and 259 transitions. [2025-04-14 01:22:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1320 transitions, 24876 flow [2025-04-14 01:22:02,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1320 transitions, 23817 flow, removed 390 selfloop flow, removed 7 redundant places. [2025-04-14 01:22:02,190 INFO L231 Difference]: Finished difference. Result has 359 places, 1254 transitions, 21386 flow [2025-04-14 01:22:02,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=19825, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21386, PETRI_PLACES=359, PETRI_TRANSITIONS=1254} [2025-04-14 01:22:02,191 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 331 predicate places. [2025-04-14 01:22:02,191 INFO L485 AbstractCegarLoop]: Abstraction has has 359 places, 1254 transitions, 21386 flow [2025-04-14 01:22:02,191 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:22:02,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:02,192 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] [2025-04-14 01:22:02,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-04-14 01:22:02,392 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:02,392 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:02,393 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash -330588874, now seen corresponding path program 11 times [2025-04-14 01:22:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:02,393 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016189584] [2025-04-14 01:22:02,393 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:22:02,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:02,396 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:22:02,401 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:02,401 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:02,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:02,747 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016189584] [2025-04-14 01:22:02,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016189584] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:02,747 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343502862] [2025-04-14 01:22:02,747 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:22:02,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:02,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:02,749 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:02,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-04-14 01:22:02,789 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:22:02,810 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:02,810 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:02,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:02,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-04-14 01:22:02,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:02,830 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:22:02,972 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:22:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:02,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:03,185 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:22:03,192 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:22:03,192 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:22:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343502862] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:03,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-04-14 01:22:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446064228] [2025-04-14 01:22:03,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:03,521 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 01:22:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:03,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 01:22:03,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2025-04-14 01:22:03,522 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:03,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1254 transitions, 21386 flow. Second operand has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:22:03,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:03,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:03,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:06,745 INFO L116 PetriNetUnfolderBase]: 7249/10865 cut-off events. [2025-04-14 01:22:06,746 INFO L117 PetriNetUnfolderBase]: For 150520/150520 co-relation queries the response was YES. [2025-04-14 01:22:06,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85671 conditions, 10865 events. 7249/10865 cut-off events. For 150520/150520 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 65779 event pairs, 860 based on Foata normal form. 8/10873 useless extension candidates. Maximal degree in co-relation 85381. Up to 8661 conditions per place. [2025-04-14 01:22:06,908 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 957 selfloop transitions, 515 changer transitions 14/1486 dead transitions. [2025-04-14 01:22:06,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1486 transitions, 26622 flow [2025-04-14 01:22:06,908 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 01:22:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 01:22:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 291 transitions. [2025-04-14 01:22:06,909 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43047337278106507 [2025-04-14 01:22:06,909 INFO L175 Difference]: Start difference. First operand has 359 places, 1254 transitions, 21386 flow. Second operand 26 states and 291 transitions. [2025-04-14 01:22:06,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1486 transitions, 26622 flow [2025-04-14 01:22:08,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1486 transitions, 26311 flow, removed 153 selfloop flow, removed 2 redundant places. [2025-04-14 01:22:08,634 INFO L231 Difference]: Finished difference. Result has 386 places, 1354 transitions, 23422 flow [2025-04-14 01:22:08,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=21111, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=23422, PETRI_PLACES=386, PETRI_TRANSITIONS=1354} [2025-04-14 01:22:08,635 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 358 predicate places. [2025-04-14 01:22:08,635 INFO L485 AbstractCegarLoop]: Abstraction has has 386 places, 1354 transitions, 23422 flow [2025-04-14 01:22:08,635 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 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) [2025-04-14 01:22:08,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:08,636 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] [2025-04-14 01:22:08,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-04-14 01:22:08,836 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-04-14 01:22:08,836 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:08,837 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2035882733, now seen corresponding path program 6 times [2025-04-14 01:22:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:08,837 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766021714] [2025-04-14 01:22:08,837 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:22:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:08,841 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:22:08,849 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:08,849 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:22:08,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:09,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:09,024 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766021714] [2025-04-14 01:22:09,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766021714] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:09,024 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882118224] [2025-04-14 01:22:09,024 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:22:09,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:09,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:09,026 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:09,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-04-14 01:22:09,065 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:22:09,077 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:09,077 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:22:09,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:09,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-14 01:22:09,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:09,151 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:22:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:09,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:09,223 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:22:09,223 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2025-04-14 01:22:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882118224] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:09,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:09,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2025-04-14 01:22:09,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741029551] [2025-04-14 01:22:09,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:09,526 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:22:09,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:09,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:22:09,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:22:09,527 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:09,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1354 transitions, 23422 flow. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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) [2025-04-14 01:22:09,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:09,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:09,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:12,288 INFO L116 PetriNetUnfolderBase]: 7470/11190 cut-off events. [2025-04-14 01:22:12,288 INFO L117 PetriNetUnfolderBase]: For 173287/173287 co-relation queries the response was YES. [2025-04-14 01:22:12,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91653 conditions, 11190 events. 7470/11190 cut-off events. For 173287/173287 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 67945 event pairs, 933 based on Foata normal form. 5/11195 useless extension candidates. Maximal degree in co-relation 91348. Up to 10145 conditions per place. [2025-04-14 01:22:12,437 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 1166 selfloop transitions, 241 changer transitions 1/1408 dead transitions. [2025-04-14 01:22:12,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1408 transitions, 26989 flow [2025-04-14 01:22:12,437 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 01:22:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 01:22:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2025-04-14 01:22:12,438 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-04-14 01:22:12,438 INFO L175 Difference]: Start difference. First operand has 386 places, 1354 transitions, 23422 flow. Second operand 9 states and 104 transitions. [2025-04-14 01:22:12,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1408 transitions, 26989 flow [2025-04-14 01:22:14,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1408 transitions, 26409 flow, removed 167 selfloop flow, removed 12 redundant places. [2025-04-14 01:22:14,491 INFO L231 Difference]: Finished difference. Result has 384 places, 1368 transitions, 23786 flow [2025-04-14 01:22:14,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=22837, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23786, PETRI_PLACES=384, PETRI_TRANSITIONS=1368} [2025-04-14 01:22:14,492 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 356 predicate places. [2025-04-14 01:22:14,492 INFO L485 AbstractCegarLoop]: Abstraction has has 384 places, 1368 transitions, 23786 flow [2025-04-14 01:22:14,492 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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) [2025-04-14 01:22:14,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:14,492 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] [2025-04-14 01:22:14,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-04-14 01:22:14,693 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-14 01:22:14,693 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:14,693 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1705250888, now seen corresponding path program 12 times [2025-04-14 01:22:14,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:14,694 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19510175] [2025-04-14 01:22:14,694 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:22:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:14,698 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:22:14,705 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:14,705 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:22:14,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:15,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:15,085 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19510175] [2025-04-14 01:22:15,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19510175] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:15,085 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325998022] [2025-04-14 01:22:15,086 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:22:15,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:15,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:15,087 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:15,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-04-14 01:22:15,137 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:22:15,157 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:15,157 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:22:15,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:15,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-14 01:22:15,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:15,190 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:22:15,429 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:22:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:15,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:15,797 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:22:15,807 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:22:15,807 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:22:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:16,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325998022] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:16,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:16,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2025-04-14 01:22:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517903576] [2025-04-14 01:22:16,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:16,843 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 01:22:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:16,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 01:22:16,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2025-04-14 01:22:16,844 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:16,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1368 transitions, 23786 flow. Second operand has 30 states, 30 states have (on average 5.1) internal successors, (153), 30 states have internal predecessors, (153), 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) [2025-04-14 01:22:16,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:16,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:16,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:21,000 INFO L116 PetriNetUnfolderBase]: 7734/11592 cut-off events. [2025-04-14 01:22:21,001 INFO L117 PetriNetUnfolderBase]: For 178932/178932 co-relation queries the response was YES. [2025-04-14 01:22:21,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95204 conditions, 11592 events. 7734/11592 cut-off events. For 178932/178932 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 70836 event pairs, 901 based on Foata normal form. 1/11581 useless extension candidates. Maximal degree in co-relation 94899. Up to 10487 conditions per place. [2025-04-14 01:22:21,143 INFO L140 encePairwiseOnDemand]: 12/26 looper letters, 1133 selfloop transitions, 421 changer transitions 3/1557 dead transitions. [2025-04-14 01:22:21,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1557 transitions, 29659 flow [2025-04-14 01:22:21,144 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 01:22:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 01:22:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 226 transitions. [2025-04-14 01:22:21,145 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36217948717948717 [2025-04-14 01:22:21,145 INFO L175 Difference]: Start difference. First operand has 384 places, 1368 transitions, 23786 flow. Second operand 24 states and 226 transitions. [2025-04-14 01:22:21,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1557 transitions, 29659 flow [2025-04-14 01:22:23,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1557 transitions, 29250 flow, removed 85 selfloop flow, removed 5 redundant places. [2025-04-14 01:22:23,023 INFO L231 Difference]: Finished difference. Result has 412 places, 1498 transitions, 26994 flow [2025-04-14 01:22:23,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=23385, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=26994, PETRI_PLACES=412, PETRI_TRANSITIONS=1498} [2025-04-14 01:22:23,025 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 384 predicate places. [2025-04-14 01:22:23,025 INFO L485 AbstractCegarLoop]: Abstraction has has 412 places, 1498 transitions, 26994 flow [2025-04-14 01:22:23,025 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.1) internal successors, (153), 30 states have internal predecessors, (153), 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) [2025-04-14 01:22:23,025 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:23,025 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] [2025-04-14 01:22:23,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-04-14 01:22:23,226 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:23,226 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:23,226 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash -940196876, now seen corresponding path program 13 times [2025-04-14 01:22:23,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:23,227 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039549036] [2025-04-14 01:22:23,227 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:22:23,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:23,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:22:23,234 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:23,234 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:22:23,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:23,452 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039549036] [2025-04-14 01:22:23,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039549036] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:23,452 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238240645] [2025-04-14 01:22:23,452 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:22:23,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:23,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:23,454 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:23,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-04-14 01:22:23,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:22:23,512 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:22:23,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:22:23,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:23,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-04-14 01:22:23,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:23,532 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:22:23,651 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-14 01:22:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:23,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:23,836 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2025-04-14 01:22:23,843 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:22:23,843 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2025-04-14 01:22:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:22:24,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238240645] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:24,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:24,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-04-14 01:22:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036255725] [2025-04-14 01:22:24,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:24,130 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 01:22:24,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:24,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 01:22:24,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2025-04-14 01:22:24,130 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:24,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1498 transitions, 26994 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 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) [2025-04-14 01:22:24,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:24,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:24,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:28,111 INFO L116 PetriNetUnfolderBase]: 8092/12153 cut-off events. [2025-04-14 01:22:28,112 INFO L117 PetriNetUnfolderBase]: For 216645/216645 co-relation queries the response was YES. [2025-04-14 01:22:28,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103975 conditions, 12153 events. 8092/12153 cut-off events. For 216645/216645 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 75198 event pairs, 1171 based on Foata normal form. 3/12144 useless extension candidates. Maximal degree in co-relation 103660. Up to 10941 conditions per place. [2025-04-14 01:22:28,302 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 1299 selfloop transitions, 300 changer transitions 6/1605 dead transitions. [2025-04-14 01:22:28,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1605 transitions, 31877 flow [2025-04-14 01:22:28,303 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 01:22:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 01:22:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 180 transitions. [2025-04-14 01:22:28,303 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2025-04-14 01:22:28,303 INFO L175 Difference]: Start difference. First operand has 412 places, 1498 transitions, 26994 flow. Second operand 15 states and 180 transitions. [2025-04-14 01:22:28,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1605 transitions, 31877 flow [2025-04-14 01:22:30,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1605 transitions, 30946 flow, removed 463 selfloop flow, removed 2 redundant places. [2025-04-14 01:22:30,521 INFO L231 Difference]: Finished difference. Result has 431 places, 1541 transitions, 27964 flow [2025-04-14 01:22:30,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=26285, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=27964, PETRI_PLACES=431, PETRI_TRANSITIONS=1541} [2025-04-14 01:22:30,523 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 403 predicate places. [2025-04-14 01:22:30,523 INFO L485 AbstractCegarLoop]: Abstraction has has 431 places, 1541 transitions, 27964 flow [2025-04-14 01:22:30,523 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 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) [2025-04-14 01:22:30,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:30,523 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:22:30,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-04-14 01:22:30,724 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:30,724 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:30,724 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -147226272, now seen corresponding path program 7 times [2025-04-14 01:22:30,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:30,725 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607180089] [2025-04-14 01:22:30,725 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:22:30,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:30,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 01:22:30,731 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:30,731 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:22:30,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:30,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:30,775 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607180089] [2025-04-14 01:22:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607180089] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:30,775 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600069544] [2025-04-14 01:22:30,775 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:22:30,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:30,778 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:30,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-04-14 01:22:30,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 01:22:30,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:30,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:22:30,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:30,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:22:30,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:30,890 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:30,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600069544] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:30,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:30,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-04-14 01:22:30,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640117555] [2025-04-14 01:22:30,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:30,920 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:22:30,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:30,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:22:30,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:22:30,921 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:30,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1541 transitions, 27964 flow. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2025-04-14 01:22:30,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:30,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:30,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:35,276 INFO L116 PetriNetUnfolderBase]: 9718/14983 cut-off events. [2025-04-14 01:22:35,276 INFO L117 PetriNetUnfolderBase]: For 287476/287476 co-relation queries the response was YES. [2025-04-14 01:22:35,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124251 conditions, 14983 events. 9718/14983 cut-off events. For 287476/287476 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 100862 event pairs, 2718 based on Foata normal form. 704/15675 useless extension candidates. Maximal degree in co-relation 123944. Up to 7486 conditions per place. [2025-04-14 01:22:35,541 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 1654 selfloop transitions, 131 changer transitions 34/1819 dead transitions. [2025-04-14 01:22:35,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1819 transitions, 35384 flow [2025-04-14 01:22:35,542 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:22:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:22:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2025-04-14 01:22:35,542 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2025-04-14 01:22:35,543 INFO L175 Difference]: Start difference. First operand has 431 places, 1541 transitions, 27964 flow. Second operand 7 states and 88 transitions. [2025-04-14 01:22:35,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1819 transitions, 35384 flow [2025-04-14 01:22:38,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1819 transitions, 35002 flow, removed 98 selfloop flow, removed 6 redundant places. [2025-04-14 01:22:38,766 INFO L231 Difference]: Finished difference. Result has 434 places, 1451 transitions, 26886 flow [2025-04-14 01:22:38,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=25899, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26886, PETRI_PLACES=434, PETRI_TRANSITIONS=1451} [2025-04-14 01:22:38,768 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 406 predicate places. [2025-04-14 01:22:38,768 INFO L485 AbstractCegarLoop]: Abstraction has has 434 places, 1451 transitions, 26886 flow [2025-04-14 01:22:38,768 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2025-04-14 01:22:38,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:38,768 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:22:38,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-04-14 01:22:38,968 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:38,968 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:38,969 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1628875547, now seen corresponding path program 14 times [2025-04-14 01:22:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:38,969 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752376794] [2025-04-14 01:22:38,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:22:38,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:38,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:22:38,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:38,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:38,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:39,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:39,025 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752376794] [2025-04-14 01:22:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752376794] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:39,025 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245470181] [2025-04-14 01:22:39,025 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:22:39,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:39,027 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:39,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-04-14 01:22:39,071 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:22:39,085 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:39,085 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:39,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:39,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:22:39,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:39,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:39,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245470181] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:39,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:39,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-04-14 01:22:39,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126906472] [2025-04-14 01:22:39,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:39,168 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:22:39,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:39,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:22:39,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:22:39,169 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:39,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1451 transitions, 26886 flow. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2025-04-14 01:22:39,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:39,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:39,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:42,713 INFO L116 PetriNetUnfolderBase]: 7971/12085 cut-off events. [2025-04-14 01:22:42,713 INFO L117 PetriNetUnfolderBase]: For 267907/267907 co-relation queries the response was YES. [2025-04-14 01:22:42,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108449 conditions, 12085 events. 7971/12085 cut-off events. For 267907/267907 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 76288 event pairs, 2372 based on Foata normal form. 554/12627 useless extension candidates. Maximal degree in co-relation 108259. Up to 7380 conditions per place. [2025-04-14 01:22:42,892 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 1315 selfloop transitions, 199 changer transitions 7/1521 dead transitions. [2025-04-14 01:22:42,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1521 transitions, 30633 flow [2025-04-14 01:22:42,892 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 01:22:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 01:22:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2025-04-14 01:22:42,893 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2025-04-14 01:22:42,893 INFO L175 Difference]: Start difference. First operand has 434 places, 1451 transitions, 26886 flow. Second operand 8 states and 93 transitions. [2025-04-14 01:22:42,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1521 transitions, 30633 flow [2025-04-14 01:22:45,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1521 transitions, 30428 flow, removed 70 selfloop flow, removed 15 redundant places. [2025-04-14 01:22:45,337 INFO L231 Difference]: Finished difference. Result has 425 places, 1318 transitions, 25000 flow [2025-04-14 01:22:45,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=24358, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25000, PETRI_PLACES=425, PETRI_TRANSITIONS=1318} [2025-04-14 01:22:45,338 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 397 predicate places. [2025-04-14 01:22:45,338 INFO L485 AbstractCegarLoop]: Abstraction has has 425 places, 1318 transitions, 25000 flow [2025-04-14 01:22:45,338 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2025-04-14 01:22:45,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:45,338 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:22:45,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-04-14 01:22:45,539 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:45,539 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:45,539 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:45,540 INFO L85 PathProgramCache]: Analyzing trace with hash -898746573, now seen corresponding path program 8 times [2025-04-14 01:22:45,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:45,540 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681884824] [2025-04-14 01:22:45,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:22:45,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:45,543 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:22:45,546 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:45,546 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:45,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:45,583 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681884824] [2025-04-14 01:22:45,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681884824] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:45,584 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722578174] [2025-04-14 01:22:45,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:22:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:45,585 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-04-14 01:22:45,628 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:22:45,642 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:45,642 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:45,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:45,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:22:45,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:45,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:45,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722578174] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:45,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:45,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-04-14 01:22:45,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933657916] [2025-04-14 01:22:45,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:45,731 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:22:45,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:45,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:22:45,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:22:45,731 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:45,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1318 transitions, 25000 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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) [2025-04-14 01:22:45,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:45,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:45,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:48,536 INFO L116 PetriNetUnfolderBase]: 7213/11172 cut-off events. [2025-04-14 01:22:48,536 INFO L117 PetriNetUnfolderBase]: For 254045/254045 co-relation queries the response was YES. [2025-04-14 01:22:48,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102305 conditions, 11172 events. 7213/11172 cut-off events. For 254045/254045 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 72939 event pairs, 1904 based on Foata normal form. 437/11609 useless extension candidates. Maximal degree in co-relation 101917. Up to 4705 conditions per place. [2025-04-14 01:22:48,720 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 1309 selfloop transitions, 151 changer transitions 153/1613 dead transitions. [2025-04-14 01:22:48,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1613 transitions, 32727 flow [2025-04-14 01:22:48,721 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:22:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:22:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2025-04-14 01:22:48,721 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2025-04-14 01:22:48,721 INFO L175 Difference]: Start difference. First operand has 425 places, 1318 transitions, 25000 flow. Second operand 7 states and 87 transitions. [2025-04-14 01:22:48,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1613 transitions, 32727 flow [2025-04-14 01:22:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1613 transitions, 32264 flow, removed 84 selfloop flow, removed 7 redundant places. [2025-04-14 01:22:51,155 INFO L231 Difference]: Finished difference. Result has 427 places, 1229 transitions, 23388 flow [2025-04-14 01:22:51,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=24578, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23388, PETRI_PLACES=427, PETRI_TRANSITIONS=1229} [2025-04-14 01:22:51,157 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 399 predicate places. [2025-04-14 01:22:51,157 INFO L485 AbstractCegarLoop]: Abstraction has has 427 places, 1229 transitions, 23388 flow [2025-04-14 01:22:51,157 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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) [2025-04-14 01:22:51,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:51,157 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] [2025-04-14 01:22:51,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-04-14 01:22:51,357 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-04-14 01:22:51,357 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:51,358 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2051227476, now seen corresponding path program 1 times [2025-04-14 01:22:51,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:51,358 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276132529] [2025-04-14 01:22:51,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:22:51,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:51,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 01:22:51,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:51,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:22:51,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:51,402 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276132529] [2025-04-14 01:22:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276132529] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:51,402 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099433320] [2025-04-14 01:22:51,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:22:51,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:51,404 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:51,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-04-14 01:22:51,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 01:22:51,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:51,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:22:51,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:51,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:22:51,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:51,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:51,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099433320] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:51,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:51,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-04-14 01:22:51,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343968792] [2025-04-14 01:22:51,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:51,667 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:22:51,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:51,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:22:51,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:22:51,667 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:51,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1229 transitions, 23388 flow. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 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) [2025-04-14 01:22:51,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:51,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:22:54,227 INFO L116 PetriNetUnfolderBase]: 6735/10292 cut-off events. [2025-04-14 01:22:54,227 INFO L117 PetriNetUnfolderBase]: For 249499/249499 co-relation queries the response was YES. [2025-04-14 01:22:54,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97311 conditions, 10292 events. 6735/10292 cut-off events. For 249499/249499 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 64787 event pairs, 1629 based on Foata normal form. 123/10415 useless extension candidates. Maximal degree in co-relation 96923. Up to 4705 conditions per place. [2025-04-14 01:22:54,368 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1235 selfloop transitions, 145 changer transitions 118/1498 dead transitions. [2025-04-14 01:22:54,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1498 transitions, 30476 flow [2025-04-14 01:22:54,368 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:22:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:22:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2025-04-14 01:22:54,368 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2025-04-14 01:22:54,369 INFO L175 Difference]: Start difference. First operand has 427 places, 1229 transitions, 23388 flow. Second operand 10 states and 124 transitions. [2025-04-14 01:22:54,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1498 transitions, 30476 flow [2025-04-14 01:22:56,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1498 transitions, 30354 flow, removed 45 selfloop flow, removed 9 redundant places. [2025-04-14 01:22:56,792 INFO L231 Difference]: Finished difference. Result has 428 places, 1206 transitions, 23312 flow [2025-04-14 01:22:56,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=23198, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1079, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23312, PETRI_PLACES=428, PETRI_TRANSITIONS=1206} [2025-04-14 01:22:56,794 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 400 predicate places. [2025-04-14 01:22:56,794 INFO L485 AbstractCegarLoop]: Abstraction has has 428 places, 1206 transitions, 23312 flow [2025-04-14 01:22:56,794 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 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) [2025-04-14 01:22:56,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:22:56,794 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] [2025-04-14 01:22:56,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-04-14 01:22:56,995 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:56,995 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:22:56,996 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:22:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash -518868466, now seen corresponding path program 2 times [2025-04-14 01:22:56,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:22:56,996 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843519789] [2025-04-14 01:22:56,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:22:56,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:22:57,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:22:57,009 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:57,009 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:57,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:57,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:22:57,064 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843519789] [2025-04-14 01:22:57,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843519789] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:22:57,065 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878944974] [2025-04-14 01:22:57,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:22:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:22:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:22:57,067 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:22:57,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-04-14 01:22:57,125 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:22:57,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:22:57,147 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:22:57,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:22:57,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:22:57,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:22:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:57,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:22:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:22:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878944974] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:22:57,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:22:57,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-04-14 01:22:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451195406] [2025-04-14 01:22:57,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:22:57,335 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:22:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:22:57,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:22:57,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:22:57,336 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:22:57,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1206 transitions, 23312 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 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) [2025-04-14 01:22:57,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:22:57,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:22:57,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:00,101 INFO L116 PetriNetUnfolderBase]: 6632/9971 cut-off events. [2025-04-14 01:23:00,101 INFO L117 PetriNetUnfolderBase]: For 275631/275631 co-relation queries the response was YES. [2025-04-14 01:23:00,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98599 conditions, 9971 events. 6632/9971 cut-off events. For 275631/275631 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 60697 event pairs, 1664 based on Foata normal form. 144/10115 useless extension candidates. Maximal degree in co-relation 98213. Up to 4705 conditions per place. [2025-04-14 01:23:00,319 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1223 selfloop transitions, 178 changer transitions 73/1474 dead transitions. [2025-04-14 01:23:00,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1474 transitions, 30664 flow [2025-04-14 01:23:00,320 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:23:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:23:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2025-04-14 01:23:00,321 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-04-14 01:23:00,321 INFO L175 Difference]: Start difference. First operand has 428 places, 1206 transitions, 23312 flow. Second operand 10 states and 117 transitions. [2025-04-14 01:23:00,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1474 transitions, 30664 flow [2025-04-14 01:23:02,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1474 transitions, 30172 flow, removed 96 selfloop flow, removed 9 redundant places. [2025-04-14 01:23:02,808 INFO L231 Difference]: Finished difference. Result has 429 places, 1223 transitions, 23729 flow [2025-04-14 01:23:02,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=22870, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23729, PETRI_PLACES=429, PETRI_TRANSITIONS=1223} [2025-04-14 01:23:02,809 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 401 predicate places. [2025-04-14 01:23:02,809 INFO L485 AbstractCegarLoop]: Abstraction has has 429 places, 1223 transitions, 23729 flow [2025-04-14 01:23:02,810 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 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) [2025-04-14 01:23:02,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:02,810 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] [2025-04-14 01:23:02,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-04-14 01:23:03,013 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:03,014 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:03,014 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1673711638, now seen corresponding path program 3 times [2025-04-14 01:23:03,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:03,014 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158276083] [2025-04-14 01:23:03,014 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:23:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:03,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:03,021 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:03,021 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:23:03,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:03,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:03,082 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158276083] [2025-04-14 01:23:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158276083] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:03,082 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594093409] [2025-04-14 01:23:03,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:23:03,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:03,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:03,085 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:03,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-04-14 01:23:03,136 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:03,152 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:03,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:23:03,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:03,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:23:03,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:03,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594093409] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:03,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:03,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-04-14 01:23:03,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107431043] [2025-04-14 01:23:03,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:03,271 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:23:03,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:03,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:23:03,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:23:03,271 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:03,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1223 transitions, 23729 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 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) [2025-04-14 01:23:03,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:03,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:03,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:06,002 INFO L116 PetriNetUnfolderBase]: 6352/9601 cut-off events. [2025-04-14 01:23:06,002 INFO L117 PetriNetUnfolderBase]: For 292407/292407 co-relation queries the response was YES. [2025-04-14 01:23:06,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96688 conditions, 9601 events. 6352/9601 cut-off events. For 292407/292407 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 58553 event pairs, 1666 based on Foata normal form. 228/9829 useless extension candidates. Maximal degree in co-relation 96299. Up to 4705 conditions per place. [2025-04-14 01:23:06,171 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1199 selfloop transitions, 146 changer transitions 51/1396 dead transitions. [2025-04-14 01:23:06,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1396 transitions, 28963 flow [2025-04-14 01:23:06,171 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:23:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:23:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2025-04-14 01:23:06,172 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2025-04-14 01:23:06,172 INFO L175 Difference]: Start difference. First operand has 429 places, 1223 transitions, 23729 flow. Second operand 10 states and 115 transitions. [2025-04-14 01:23:06,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1396 transitions, 28963 flow [2025-04-14 01:23:08,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1396 transitions, 28345 flow, removed 128 selfloop flow, removed 9 redundant places. [2025-04-14 01:23:08,672 INFO L231 Difference]: Finished difference. Result has 427 places, 1171 transitions, 22426 flow [2025-04-14 01:23:08,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=22348, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22426, PETRI_PLACES=427, PETRI_TRANSITIONS=1171} [2025-04-14 01:23:08,673 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 399 predicate places. [2025-04-14 01:23:08,673 INFO L485 AbstractCegarLoop]: Abstraction has has 427 places, 1171 transitions, 22426 flow [2025-04-14 01:23:08,674 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 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) [2025-04-14 01:23:08,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:08,674 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] [2025-04-14 01:23:08,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-04-14 01:23:08,874 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-04-14 01:23:08,874 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:08,875 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1442573902, now seen corresponding path program 4 times [2025-04-14 01:23:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:08,875 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178956645] [2025-04-14 01:23:08,875 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:23:08,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:08,879 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:08,880 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 22 statements. [2025-04-14 01:23:08,880 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:23:08,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:08,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:08,909 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178956645] [2025-04-14 01:23:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178956645] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:08,909 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300626146] [2025-04-14 01:23:08,909 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:23:08,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:08,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:08,912 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:08,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-04-14 01:23:08,956 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:08,965 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 22 statements. [2025-04-14 01:23:08,965 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:23:08,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:08,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 01:23:08,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:09,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:09,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300626146] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:09,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:09,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-04-14 01:23:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551106443] [2025-04-14 01:23:09,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:09,040 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:23:09,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:09,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:23:09,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:23:09,041 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:09,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1171 transitions, 22426 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 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) [2025-04-14 01:23:09,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:09,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:09,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:11,524 INFO L116 PetriNetUnfolderBase]: 6542/9837 cut-off events. [2025-04-14 01:23:11,524 INFO L117 PetriNetUnfolderBase]: For 287714/287714 co-relation queries the response was YES. [2025-04-14 01:23:11,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98515 conditions, 9837 events. 6542/9837 cut-off events. For 287714/287714 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 59661 event pairs, 927 based on Foata normal form. 8/9845 useless extension candidates. Maximal degree in co-relation 98128. Up to 5050 conditions per place. [2025-04-14 01:23:11,685 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1009 selfloop transitions, 506 changer transitions 9/1524 dead transitions. [2025-04-14 01:23:11,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1524 transitions, 31916 flow [2025-04-14 01:23:11,685 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:23:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:23:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 182 transitions. [2025-04-14 01:23:11,686 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-04-14 01:23:11,686 INFO L175 Difference]: Start difference. First operand has 427 places, 1171 transitions, 22426 flow. Second operand 18 states and 182 transitions. [2025-04-14 01:23:11,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1524 transitions, 31916 flow [2025-04-14 01:23:14,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1524 transitions, 31380 flow, removed 55 selfloop flow, removed 7 redundant places. [2025-04-14 01:23:14,380 INFO L231 Difference]: Finished difference. Result has 449 places, 1322 transitions, 27118 flow [2025-04-14 01:23:14,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=22134, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27118, PETRI_PLACES=449, PETRI_TRANSITIONS=1322} [2025-04-14 01:23:14,381 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 421 predicate places. [2025-04-14 01:23:14,382 INFO L485 AbstractCegarLoop]: Abstraction has has 449 places, 1322 transitions, 27118 flow [2025-04-14 01:23:14,382 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 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) [2025-04-14 01:23:14,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:14,382 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] [2025-04-14 01:23:14,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-04-14 01:23:14,582 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-04-14 01:23:14,582 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:14,583 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1953063868, now seen corresponding path program 5 times [2025-04-14 01:23:14,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:14,583 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605595244] [2025-04-14 01:23:14,583 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:23:14,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:14,586 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:14,588 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:14,589 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:23:14,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:14,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:14,633 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605595244] [2025-04-14 01:23:14,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605595244] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:14,633 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387220919] [2025-04-14 01:23:14,633 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:23:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:14,635 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:14,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-04-14 01:23:14,677 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:14,691 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:14,691 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:23:14,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:14,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:23:14,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:14,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:14,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387220919] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:14,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:14,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-04-14 01:23:14,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373178243] [2025-04-14 01:23:14,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:14,787 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:23:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:14,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:23:14,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:23:14,787 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:14,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1322 transitions, 27118 flow. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 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) [2025-04-14 01:23:14,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:14,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:14,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:17,635 INFO L116 PetriNetUnfolderBase]: 6988/10665 cut-off events. [2025-04-14 01:23:17,635 INFO L117 PetriNetUnfolderBase]: For 367712/367712 co-relation queries the response was YES. [2025-04-14 01:23:17,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114407 conditions, 10665 events. 6988/10665 cut-off events. For 367712/367712 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 67526 event pairs, 1458 based on Foata normal form. 232/10897 useless extension candidates. Maximal degree in co-relation 114000. Up to 4931 conditions per place. [2025-04-14 01:23:17,845 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1325 selfloop transitions, 195 changer transitions 87/1607 dead transitions. [2025-04-14 01:23:17,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1607 transitions, 35910 flow [2025-04-14 01:23:17,846 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:23:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:23:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2025-04-14 01:23:17,846 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2025-04-14 01:23:17,846 INFO L175 Difference]: Start difference. First operand has 449 places, 1322 transitions, 27118 flow. Second operand 10 states and 115 transitions. [2025-04-14 01:23:17,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1607 transitions, 35910 flow [2025-04-14 01:23:21,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1607 transitions, 34486 flow, removed 691 selfloop flow, removed 1 redundant places. [2025-04-14 01:23:21,702 INFO L231 Difference]: Finished difference. Result has 461 places, 1397 transitions, 28727 flow [2025-04-14 01:23:21,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=26117, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=28727, PETRI_PLACES=461, PETRI_TRANSITIONS=1397} [2025-04-14 01:23:21,703 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 433 predicate places. [2025-04-14 01:23:21,703 INFO L485 AbstractCegarLoop]: Abstraction has has 461 places, 1397 transitions, 28727 flow [2025-04-14 01:23:21,703 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 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) [2025-04-14 01:23:21,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:21,704 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] [2025-04-14 01:23:21,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-04-14 01:23:21,904 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-04-14 01:23:21,904 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:21,904 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash 532964232, now seen corresponding path program 6 times [2025-04-14 01:23:21,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:21,905 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311232323] [2025-04-14 01:23:21,905 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:23:21,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:21,908 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:21,910 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:21,910 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:23:21,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:21,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:21,947 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311232323] [2025-04-14 01:23:21,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311232323] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:21,947 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275854461] [2025-04-14 01:23:21,947 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:23:21,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:21,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:21,948 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:21,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-04-14 01:23:21,991 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:23:22,003 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:22,003 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:23:22,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:22,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:23:22,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:22,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:22,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275854461] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:22,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:22,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-04-14 01:23:22,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070974287] [2025-04-14 01:23:22,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:22,084 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:23:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:22,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:23:22,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:23:22,085 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:22,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1397 transitions, 28727 flow. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 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) [2025-04-14 01:23:22,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:22,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:22,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:24,780 INFO L116 PetriNetUnfolderBase]: 6737/10287 cut-off events. [2025-04-14 01:23:24,781 INFO L117 PetriNetUnfolderBase]: For 362644/362644 co-relation queries the response was YES. [2025-04-14 01:23:24,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113094 conditions, 10287 events. 6737/10287 cut-off events. For 362644/362644 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 64580 event pairs, 1204 based on Foata normal form. 232/10519 useless extension candidates. Maximal degree in co-relation 112671. Up to 4931 conditions per place. [2025-04-14 01:23:24,949 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1168 selfloop transitions, 214 changer transitions 57/1439 dead transitions. [2025-04-14 01:23:24,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1439 transitions, 32127 flow [2025-04-14 01:23:24,951 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:23:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:23:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2025-04-14 01:23:24,951 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2025-04-14 01:23:24,951 INFO L175 Difference]: Start difference. First operand has 461 places, 1397 transitions, 28727 flow. Second operand 10 states and 115 transitions. [2025-04-14 01:23:24,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1439 transitions, 32127 flow [2025-04-14 01:23:28,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1439 transitions, 31454 flow, removed 193 selfloop flow, removed 7 redundant places. [2025-04-14 01:23:28,982 INFO L231 Difference]: Finished difference. Result has 466 places, 1319 transitions, 27266 flow [2025-04-14 01:23:28,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=26813, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=27266, PETRI_PLACES=466, PETRI_TRANSITIONS=1319} [2025-04-14 01:23:28,983 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 438 predicate places. [2025-04-14 01:23:28,984 INFO L485 AbstractCegarLoop]: Abstraction has has 466 places, 1319 transitions, 27266 flow [2025-04-14 01:23:28,984 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 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) [2025-04-14 01:23:28,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:28,984 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] [2025-04-14 01:23:28,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-04-14 01:23:29,184 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-04-14 01:23:29,184 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:29,185 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1609144628, now seen corresponding path program 7 times [2025-04-14 01:23:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:29,185 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763293481] [2025-04-14 01:23:29,185 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:23:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:29,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 01:23:29,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:29,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:23:29,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:29,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:29,243 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763293481] [2025-04-14 01:23:29,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763293481] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:29,243 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628738728] [2025-04-14 01:23:29,243 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:23:29,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:29,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:29,245 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:29,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-04-14 01:23:29,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 01:23:29,311 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:23:29,311 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:23:29,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:29,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:23:29,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:29,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:23:29,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628738728] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:29,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:29,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-04-14 01:23:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045520694] [2025-04-14 01:23:29,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:29,435 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:23:29,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:29,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:23:29,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:23:29,436 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:29,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1319 transitions, 27266 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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) [2025-04-14 01:23:29,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:29,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:29,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:32,083 INFO L116 PetriNetUnfolderBase]: 6251/9569 cut-off events. [2025-04-14 01:23:32,083 INFO L117 PetriNetUnfolderBase]: For 307524/307524 co-relation queries the response was YES. [2025-04-14 01:23:32,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103862 conditions, 9569 events. 6251/9569 cut-off events. For 307524/307524 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 59774 event pairs, 1417 based on Foata normal form. 147/9716 useless extension candidates. Maximal degree in co-relation 103551. Up to 4931 conditions per place. [2025-04-14 01:23:32,233 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1199 selfloop transitions, 91 changer transitions 47/1337 dead transitions. [2025-04-14 01:23:32,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1337 transitions, 30123 flow [2025-04-14 01:23:32,234 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 01:23:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 01:23:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2025-04-14 01:23:32,234 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2025-04-14 01:23:32,234 INFO L175 Difference]: Start difference. First operand has 466 places, 1319 transitions, 27266 flow. Second operand 9 states and 101 transitions. [2025-04-14 01:23:32,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1337 transitions, 30123 flow [2025-04-14 01:23:35,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1337 transitions, 29534 flow, removed 78 selfloop flow, removed 17 redundant places. [2025-04-14 01:23:35,281 INFO L231 Difference]: Finished difference. Result has 450 places, 1233 transitions, 25087 flow [2025-04-14 01:23:35,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=25753, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25087, PETRI_PLACES=450, PETRI_TRANSITIONS=1233} [2025-04-14 01:23:35,282 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 422 predicate places. [2025-04-14 01:23:35,282 INFO L485 AbstractCegarLoop]: Abstraction has has 450 places, 1233 transitions, 25087 flow [2025-04-14 01:23:35,282 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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) [2025-04-14 01:23:35,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:35,282 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:23:35,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2025-04-14 01:23:35,483 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:35,483 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:35,483 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2036494210, now seen corresponding path program 15 times [2025-04-14 01:23:35,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:35,483 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28610261] [2025-04-14 01:23:35,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:23:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:35,487 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-04-14 01:23:35,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:35,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:23:35,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:23:35,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:35,526 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28610261] [2025-04-14 01:23:35,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28610261] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:35,527 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394080455] [2025-04-14 01:23:35,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:23:35,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:35,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:35,528 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:35,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-04-14 01:23:35,574 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-04-14 01:23:35,588 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:35,588 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:23:35,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:35,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:23:35,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:23:35,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:23:35,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394080455] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:35,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:35,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-04-14 01:23:35,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337296096] [2025-04-14 01:23:35,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:35,703 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:23:35,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:35,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:23:35,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:23:35,703 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:35,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1233 transitions, 25087 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 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) [2025-04-14 01:23:35,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:35,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:37,462 INFO L116 PetriNetUnfolderBase]: 4146/6319 cut-off events. [2025-04-14 01:23:37,462 INFO L117 PetriNetUnfolderBase]: For 182197/182197 co-relation queries the response was YES. [2025-04-14 01:23:37,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67471 conditions, 6319 events. 4146/6319 cut-off events. For 182197/182197 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36067 event pairs, 1143 based on Foata normal form. 294/6613 useless extension candidates. Maximal degree in co-relation 67317. Up to 4931 conditions per place. [2025-04-14 01:23:37,538 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 850 selfloop transitions, 3 changer transitions 273/1126 dead transitions. [2025-04-14 01:23:37,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1126 transitions, 25054 flow [2025-04-14 01:23:37,538 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:23:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:23:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2025-04-14 01:23:37,539 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-04-14 01:23:37,539 INFO L175 Difference]: Start difference. First operand has 450 places, 1233 transitions, 25087 flow. Second operand 7 states and 78 transitions. [2025-04-14 01:23:37,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1126 transitions, 25054 flow [2025-04-14 01:23:39,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1126 transitions, 24308 flow, removed 120 selfloop flow, removed 20 redundant places. [2025-04-14 01:23:39,174 INFO L231 Difference]: Finished difference. Result has 415 places, 853 transitions, 15187 flow [2025-04-14 01:23:39,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=21989, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15187, PETRI_PLACES=415, PETRI_TRANSITIONS=853} [2025-04-14 01:23:39,176 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 387 predicate places. [2025-04-14 01:23:39,176 INFO L485 AbstractCegarLoop]: Abstraction has has 415 places, 853 transitions, 15187 flow [2025-04-14 01:23:39,176 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 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) [2025-04-14 01:23:39,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:39,176 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:23:39,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-04-14 01:23:39,376 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2025-04-14 01:23:39,377 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:39,377 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1280012687, now seen corresponding path program 9 times [2025-04-14 01:23:39,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:39,377 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978134678] [2025-04-14 01:23:39,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:23:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:39,382 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:39,384 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:39,384 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:23:39,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:23:39,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:39,430 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978134678] [2025-04-14 01:23:39,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978134678] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:39,430 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600819615] [2025-04-14 01:23:39,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:23:39,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:39,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:39,432 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:39,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-04-14 01:23:39,475 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:39,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:39,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:23:39,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:39,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:23:39,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:23:39,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:23:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600819615] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:39,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-04-14 01:23:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177170497] [2025-04-14 01:23:39,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:39,592 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:23:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:39,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:23:39,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:23:39,592 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:39,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 853 transitions, 15187 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 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) [2025-04-14 01:23:39,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:39,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:39,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:40,727 INFO L116 PetriNetUnfolderBase]: 3926/5678 cut-off events. [2025-04-14 01:23:40,727 INFO L117 PetriNetUnfolderBase]: For 164166/164166 co-relation queries the response was YES. [2025-04-14 01:23:40,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58388 conditions, 5678 events. 3926/5678 cut-off events. For 164166/164166 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 29073 event pairs, 317 based on Foata normal form. 44/5722 useless extension candidates. Maximal degree in co-relation 58245. Up to 2001 conditions per place. [2025-04-14 01:23:40,796 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 867 selfloop transitions, 305 changer transitions 0/1172 dead transitions. [2025-04-14 01:23:40,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1172 transitions, 23268 flow [2025-04-14 01:23:40,797 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:23:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:23:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2025-04-14 01:23:40,797 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2025-04-14 01:23:40,797 INFO L175 Difference]: Start difference. First operand has 415 places, 853 transitions, 15187 flow. Second operand 10 states and 99 transitions. [2025-04-14 01:23:40,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1172 transitions, 23268 flow [2025-04-14 01:23:41,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1172 transitions, 21489 flow, removed 402 selfloop flow, removed 31 redundant places. [2025-04-14 01:23:41,625 INFO L231 Difference]: Finished difference. Result has 342 places, 890 transitions, 15628 flow [2025-04-14 01:23:41,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13949, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15628, PETRI_PLACES=342, PETRI_TRANSITIONS=890} [2025-04-14 01:23:41,626 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 314 predicate places. [2025-04-14 01:23:41,626 INFO L485 AbstractCegarLoop]: Abstraction has has 342 places, 890 transitions, 15628 flow [2025-04-14 01:23:41,626 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 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) [2025-04-14 01:23:41,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:41,627 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:23:41,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-04-14 01:23:41,827 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2025-04-14 01:23:41,827 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:41,827 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash -861987591, now seen corresponding path program 10 times [2025-04-14 01:23:41,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:41,828 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220442283] [2025-04-14 01:23:41,828 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:23:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:41,831 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:41,832 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-04-14 01:23:41,832 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:23:41,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:41,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:41,869 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220442283] [2025-04-14 01:23:41,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220442283] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:41,869 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9309718] [2025-04-14 01:23:41,869 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:23:41,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:41,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:41,872 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:41,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-04-14 01:23:41,922 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:41,930 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-04-14 01:23:41,930 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:23:41,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:41,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:23:41,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:41,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9309718] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:42,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:42,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-04-14 01:23:42,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108110660] [2025-04-14 01:23:42,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:42,013 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:23:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:42,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:23:42,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:23:42,013 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:42,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 890 transitions, 15628 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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) [2025-04-14 01:23:42,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:42,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:42,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:43,472 INFO L116 PetriNetUnfolderBase]: 4411/6362 cut-off events. [2025-04-14 01:23:43,472 INFO L117 PetriNetUnfolderBase]: For 162794/162794 co-relation queries the response was YES. [2025-04-14 01:23:43,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63389 conditions, 6362 events. 4411/6362 cut-off events. For 162794/162794 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 32686 event pairs, 207 based on Foata normal form. 13/6375 useless extension candidates. Maximal degree in co-relation 63261. Up to 2291 conditions per place. [2025-04-14 01:23:43,536 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 790 selfloop transitions, 384 changer transitions 0/1174 dead transitions. [2025-04-14 01:23:43,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1174 transitions, 22637 flow [2025-04-14 01:23:43,536 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 01:23:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 01:23:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 266 transitions. [2025-04-14 01:23:43,537 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39349112426035504 [2025-04-14 01:23:43,537 INFO L175 Difference]: Start difference. First operand has 342 places, 890 transitions, 15628 flow. Second operand 26 states and 266 transitions. [2025-04-14 01:23:43,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1174 transitions, 22637 flow [2025-04-14 01:23:44,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1174 transitions, 21859 flow, removed 167 selfloop flow, removed 9 redundant places. [2025-04-14 01:23:44,368 INFO L231 Difference]: Finished difference. Result has 378 places, 1006 transitions, 18508 flow [2025-04-14 01:23:44,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=15064, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18508, PETRI_PLACES=378, PETRI_TRANSITIONS=1006} [2025-04-14 01:23:44,369 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 350 predicate places. [2025-04-14 01:23:44,369 INFO L485 AbstractCegarLoop]: Abstraction has has 378 places, 1006 transitions, 18508 flow [2025-04-14 01:23:44,369 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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) [2025-04-14 01:23:44,369 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:44,369 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:23:44,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-04-14 01:23:44,569 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2025-04-14 01:23:44,569 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:44,570 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash 532360900, now seen corresponding path program 16 times [2025-04-14 01:23:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:44,570 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047070249] [2025-04-14 01:23:44,570 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:23:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:44,574 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:44,574 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-04-14 01:23:44,575 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:23:44,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:44,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:44,604 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047070249] [2025-04-14 01:23:44,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047070249] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:44,604 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237863733] [2025-04-14 01:23:44,604 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:23:44,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:44,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:44,606 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:44,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-04-14 01:23:44,649 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:44,658 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-04-14 01:23:44,658 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:23:44,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:44,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:23:44,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:44,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:44,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237863733] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:44,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:44,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-04-14 01:23:44,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041827025] [2025-04-14 01:23:44,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:44,730 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:23:44,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:44,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:23:44,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:23:44,731 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:44,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1006 transitions, 18508 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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) [2025-04-14 01:23:44,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:44,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:44,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:46,601 INFO L116 PetriNetUnfolderBase]: 5015/7278 cut-off events. [2025-04-14 01:23:46,601 INFO L117 PetriNetUnfolderBase]: For 232176/232176 co-relation queries the response was YES. [2025-04-14 01:23:46,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76614 conditions, 7278 events. 5015/7278 cut-off events. For 232176/232176 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 38449 event pairs, 198 based on Foata normal form. 16/7294 useless extension candidates. Maximal degree in co-relation 76469. Up to 2628 conditions per place. [2025-04-14 01:23:46,695 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 873 selfloop transitions, 409 changer transitions 0/1282 dead transitions. [2025-04-14 01:23:46,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1282 transitions, 26145 flow [2025-04-14 01:23:46,695 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 01:23:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 01:23:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 282 transitions. [2025-04-14 01:23:46,696 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3873626373626374 [2025-04-14 01:23:46,696 INFO L175 Difference]: Start difference. First operand has 378 places, 1006 transitions, 18508 flow. Second operand 28 states and 282 transitions. [2025-04-14 01:23:46,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1282 transitions, 26145 flow [2025-04-14 01:23:48,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1282 transitions, 24906 flow, removed 459 selfloop flow, removed 5 redundant places. [2025-04-14 01:23:48,284 INFO L231 Difference]: Finished difference. Result has 412 places, 1109 transitions, 20640 flow [2025-04-14 01:23:48,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=17527, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=20640, PETRI_PLACES=412, PETRI_TRANSITIONS=1109} [2025-04-14 01:23:48,284 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 384 predicate places. [2025-04-14 01:23:48,285 INFO L485 AbstractCegarLoop]: Abstraction has has 412 places, 1109 transitions, 20640 flow [2025-04-14 01:23:48,285 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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) [2025-04-14 01:23:48,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:48,285 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:23:48,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2025-04-14 01:23:48,485 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:48,485 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:48,486 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash -514219538, now seen corresponding path program 17 times [2025-04-14 01:23:48,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:48,486 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569038735] [2025-04-14 01:23:48,486 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:23:48,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:48,489 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:48,491 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:48,491 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:23:48,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:48,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:48,540 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569038735] [2025-04-14 01:23:48,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569038735] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:48,540 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383519060] [2025-04-14 01:23:48,540 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:23:48,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:48,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:48,542 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:48,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-04-14 01:23:48,588 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:48,601 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:48,601 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:23:48,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:48,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:23:48,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:48,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:48,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383519060] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:48,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:48,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2025-04-14 01:23:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97227341] [2025-04-14 01:23:48,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:48,682 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:23:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:48,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:23:48,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:23:48,682 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:48,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1109 transitions, 20640 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2025-04-14 01:23:48,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:48,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:48,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:50,646 INFO L116 PetriNetUnfolderBase]: 5013/7276 cut-off events. [2025-04-14 01:23:50,647 INFO L117 PetriNetUnfolderBase]: For 237104/237104 co-relation queries the response was YES. [2025-04-14 01:23:50,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77341 conditions, 7276 events. 5013/7276 cut-off events. For 237104/237104 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 38487 event pairs, 393 based on Foata normal form. 40/7316 useless extension candidates. Maximal degree in co-relation 77188. Up to 2610 conditions per place. [2025-04-14 01:23:50,740 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 744 selfloop transitions, 552 changer transitions 0/1296 dead transitions. [2025-04-14 01:23:50,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1296 transitions, 26756 flow [2025-04-14 01:23:50,740 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 01:23:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 01:23:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 189 transitions. [2025-04-14 01:23:50,741 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36346153846153845 [2025-04-14 01:23:50,741 INFO L175 Difference]: Start difference. First operand has 412 places, 1109 transitions, 20640 flow. Second operand 20 states and 189 transitions. [2025-04-14 01:23:50,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1296 transitions, 26756 flow [2025-04-14 01:23:52,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1296 transitions, 25813 flow, removed 380 selfloop flow, removed 2 redundant places. [2025-04-14 01:23:52,556 INFO L231 Difference]: Finished difference. Result has 424 places, 1159 transitions, 22331 flow [2025-04-14 01:23:52,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=19784, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22331, PETRI_PLACES=424, PETRI_TRANSITIONS=1159} [2025-04-14 01:23:52,557 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 396 predicate places. [2025-04-14 01:23:52,557 INFO L485 AbstractCegarLoop]: Abstraction has has 424 places, 1159 transitions, 22331 flow [2025-04-14 01:23:52,557 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2025-04-14 01:23:52,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:52,557 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:23:52,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-04-14 01:23:52,758 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:52,758 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:52,758 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash 910764509, now seen corresponding path program 11 times [2025-04-14 01:23:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:52,758 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931643351] [2025-04-14 01:23:52,759 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:23:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:52,763 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:52,765 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:52,765 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:23:52,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:52,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:52,826 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931643351] [2025-04-14 01:23:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931643351] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:52,826 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510278998] [2025-04-14 01:23:52,827 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:23:52,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:52,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:52,828 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:52,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-04-14 01:23:52,887 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:52,904 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:52,904 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:23:52,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:52,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:23:52,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:52,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510278998] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:53,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2025-04-14 01:23:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955112665] [2025-04-14 01:23:53,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:53,019 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:23:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:53,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:23:53,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:23:53,020 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:53,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1159 transitions, 22331 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 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) [2025-04-14 01:23:53,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:53,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:53,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:55,067 INFO L116 PetriNetUnfolderBase]: 5303/7794 cut-off events. [2025-04-14 01:23:55,067 INFO L117 PetriNetUnfolderBase]: For 255268/255268 co-relation queries the response was YES. [2025-04-14 01:23:55,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82694 conditions, 7794 events. 5303/7794 cut-off events. For 255268/255268 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 42901 event pairs, 273 based on Foata normal form. 122/7916 useless extension candidates. Maximal degree in co-relation 82540. Up to 2821 conditions per place. [2025-04-14 01:23:55,174 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 718 selfloop transitions, 923 changer transitions 0/1641 dead transitions. [2025-04-14 01:23:55,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1641 transitions, 34543 flow [2025-04-14 01:23:55,174 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 01:23:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 01:23:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 330 transitions. [2025-04-14 01:23:55,175 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2025-04-14 01:23:55,175 INFO L175 Difference]: Start difference. First operand has 424 places, 1159 transitions, 22331 flow. Second operand 35 states and 330 transitions. [2025-04-14 01:23:55,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1641 transitions, 34543 flow [2025-04-14 01:23:57,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1641 transitions, 33897 flow, removed 227 selfloop flow, removed 7 redundant places. [2025-04-14 01:23:57,237 INFO L231 Difference]: Finished difference. Result has 463 places, 1402 transitions, 29789 flow [2025-04-14 01:23:57,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=21681, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=678, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=29789, PETRI_PLACES=463, PETRI_TRANSITIONS=1402} [2025-04-14 01:23:57,238 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 435 predicate places. [2025-04-14 01:23:57,238 INFO L485 AbstractCegarLoop]: Abstraction has has 463 places, 1402 transitions, 29789 flow [2025-04-14 01:23:57,238 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 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) [2025-04-14 01:23:57,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:23:57,238 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:23:57,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2025-04-14 01:23:57,438 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-04-14 01:23:57,439 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:23:57,439 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:23:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -224774342, now seen corresponding path program 18 times [2025-04-14 01:23:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:23:57,439 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486523539] [2025-04-14 01:23:57,439 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:23:57,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:23:57,443 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:57,445 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:57,445 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:23:57,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:23:57,494 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486523539] [2025-04-14 01:23:57,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486523539] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:23:57,495 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352841946] [2025-04-14 01:23:57,495 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:23:57,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:23:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:23:57,496 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:23:57,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-04-14 01:23:57,543 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:23:57,556 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:23:57,556 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:23:57,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:23:57,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:23:57,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:23:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:57,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:23:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:23:57,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352841946] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:23:57,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:23:57,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 01:23:57,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962911926] [2025-04-14 01:23:57,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:23:57,668 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:23:57,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:23:57,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:23:57,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:23:57,669 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:23:57,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1402 transitions, 29789 flow. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 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) [2025-04-14 01:23:57,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:23:57,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:23:57,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:23:59,688 INFO L116 PetriNetUnfolderBase]: 5319/7822 cut-off events. [2025-04-14 01:23:59,688 INFO L117 PetriNetUnfolderBase]: For 273059/273059 co-relation queries the response was YES. [2025-04-14 01:23:59,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87481 conditions, 7822 events. 5319/7822 cut-off events. For 273059/273059 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 43183 event pairs, 1073 based on Foata normal form. 32/7854 useless extension candidates. Maximal degree in co-relation 87314. Up to 6309 conditions per place. [2025-04-14 01:23:59,803 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1065 selfloop transitions, 401 changer transitions 0/1466 dead transitions. [2025-04-14 01:23:59,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1466 transitions, 33967 flow [2025-04-14 01:23:59,804 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 01:23:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 01:23:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2025-04-14 01:23:59,804 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2025-04-14 01:23:59,804 INFO L175 Difference]: Start difference. First operand has 463 places, 1402 transitions, 29789 flow. Second operand 11 states and 99 transitions. [2025-04-14 01:23:59,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1466 transitions, 33967 flow [2025-04-14 01:24:02,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1466 transitions, 31498 flow, removed 711 selfloop flow, removed 13 redundant places. [2025-04-14 01:24:02,973 INFO L231 Difference]: Finished difference. Result has 461 places, 1408 transitions, 28388 flow [2025-04-14 01:24:02,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=27286, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=28388, PETRI_PLACES=461, PETRI_TRANSITIONS=1408} [2025-04-14 01:24:02,974 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 433 predicate places. [2025-04-14 01:24:02,975 INFO L485 AbstractCegarLoop]: Abstraction has has 461 places, 1408 transitions, 28388 flow [2025-04-14 01:24:02,975 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 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) [2025-04-14 01:24:02,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:24:02,975 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:24:02,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-04-14 01:24:03,175 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-04-14 01:24:03,175 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:24:03,176 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:24:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1278542021, now seen corresponding path program 12 times [2025-04-14 01:24:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:24:03,176 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164532276] [2025-04-14 01:24:03,176 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:24:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:24:03,180 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:03,183 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:03,183 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:24:03,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:03,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:24:03,232 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164532276] [2025-04-14 01:24:03,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164532276] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:24:03,232 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692238302] [2025-04-14 01:24:03,232 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:24:03,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:24:03,234 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:24:03,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-04-14 01:24:03,280 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:03,294 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:03,294 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:24:03,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:03,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:24:03,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:24:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:03,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:24:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:03,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692238302] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:24:03,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:24:03,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-04-14 01:24:03,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104869730] [2025-04-14 01:24:03,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:24:03,437 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 01:24:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:24:03,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 01:24:03,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2025-04-14 01:24:03,437 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:24:03,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1408 transitions, 28388 flow. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 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) [2025-04-14 01:24:03,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:24:03,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:24:03,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:24:05,762 INFO L116 PetriNetUnfolderBase]: 5397/7962 cut-off events. [2025-04-14 01:24:05,762 INFO L117 PetriNetUnfolderBase]: For 232352/232352 co-relation queries the response was YES. [2025-04-14 01:24:05,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84141 conditions, 7962 events. 5397/7962 cut-off events. For 232352/232352 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 44184 event pairs, 607 based on Foata normal form. 62/8024 useless extension candidates. Maximal degree in co-relation 83976. Up to 3761 conditions per place. [2025-04-14 01:24:05,865 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1008 selfloop transitions, 576 changer transitions 0/1584 dead transitions. [2025-04-14 01:24:05,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1584 transitions, 34866 flow [2025-04-14 01:24:05,865 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-14 01:24:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-14 01:24:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 120 transitions. [2025-04-14 01:24:05,866 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35502958579881655 [2025-04-14 01:24:05,866 INFO L175 Difference]: Start difference. First operand has 461 places, 1408 transitions, 28388 flow. Second operand 13 states and 120 transitions. [2025-04-14 01:24:05,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1584 transitions, 34866 flow [2025-04-14 01:24:08,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1584 transitions, 34028 flow, removed 183 selfloop flow, removed 8 redundant places. [2025-04-14 01:24:08,138 INFO L231 Difference]: Finished difference. Result has 466 places, 1422 transitions, 29031 flow [2025-04-14 01:24:08,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=27574, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=29031, PETRI_PLACES=466, PETRI_TRANSITIONS=1422} [2025-04-14 01:24:08,139 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 438 predicate places. [2025-04-14 01:24:08,139 INFO L485 AbstractCegarLoop]: Abstraction has has 466 places, 1422 transitions, 29031 flow [2025-04-14 01:24:08,139 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 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) [2025-04-14 01:24:08,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:24:08,139 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:24:08,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2025-04-14 01:24:08,340 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2025-04-14 01:24:08,340 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:24:08,340 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:24:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash -245663248, now seen corresponding path program 19 times [2025-04-14 01:24:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:24:08,341 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515810946] [2025-04-14 01:24:08,341 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:24:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:24:08,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-14 01:24:08,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:08,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:24:08,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:08,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:24:08,395 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515810946] [2025-04-14 01:24:08,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515810946] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:24:08,395 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526540992] [2025-04-14 01:24:08,395 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:24:08,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:24:08,397 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:24:08,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-04-14 01:24:08,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-14 01:24:08,456 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:08,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:24:08,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:08,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:24:08,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:24:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:08,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:24:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:08,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526540992] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:24:08,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:24:08,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 01:24:08,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802936699] [2025-04-14 01:24:08,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:24:08,564 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:24:08,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:24:08,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:24:08,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:24:08,565 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:24:08,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1422 transitions, 29031 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 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) [2025-04-14 01:24:08,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:24:08,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:24:08,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:24:11,122 INFO L116 PetriNetUnfolderBase]: 6107/8959 cut-off events. [2025-04-14 01:24:11,122 INFO L117 PetriNetUnfolderBase]: For 277198/277198 co-relation queries the response was YES. [2025-04-14 01:24:11,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97130 conditions, 8959 events. 6107/8959 cut-off events. For 277198/277198 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 50103 event pairs, 391 based on Foata normal form. 31/8990 useless extension candidates. Maximal degree in co-relation 96964. Up to 3433 conditions per place. [2025-04-14 01:24:11,241 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1114 selfloop transitions, 609 changer transitions 0/1723 dead transitions. [2025-04-14 01:24:11,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1723 transitions, 38845 flow [2025-04-14 01:24:11,241 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:24:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:24:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2025-04-14 01:24:11,242 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36153846153846153 [2025-04-14 01:24:11,242 INFO L175 Difference]: Start difference. First operand has 466 places, 1422 transitions, 29031 flow. Second operand 10 states and 94 transitions. [2025-04-14 01:24:11,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1723 transitions, 38845 flow [2025-04-14 01:24:14,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1723 transitions, 37894 flow, removed 16 selfloop flow, removed 9 redundant places. [2025-04-14 01:24:14,021 INFO L231 Difference]: Finished difference. Result has 469 places, 1467 transitions, 31015 flow [2025-04-14 01:24:14,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=28080, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=31015, PETRI_PLACES=469, PETRI_TRANSITIONS=1467} [2025-04-14 01:24:14,023 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 441 predicate places. [2025-04-14 01:24:14,023 INFO L485 AbstractCegarLoop]: Abstraction has has 469 places, 1467 transitions, 31015 flow [2025-04-14 01:24:14,023 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 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) [2025-04-14 01:24:14,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:24:14,023 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:24:14,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2025-04-14 01:24:14,223 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:14,224 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:24:14,224 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:24:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1758748985, now seen corresponding path program 13 times [2025-04-14 01:24:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:24:14,224 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540384051] [2025-04-14 01:24:14,224 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:24:14,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:24:14,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-14 01:24:14,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:14,231 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:24:14,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:14,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:24:14,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540384051] [2025-04-14 01:24:14,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540384051] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:24:14,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167898432] [2025-04-14 01:24:14,291 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:24:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:24:14,293 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:24:14,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-04-14 01:24:14,346 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-14 01:24:14,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:14,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:24:14,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:14,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:24:14,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:24:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:14,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:24:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167898432] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:24:14,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:24:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-04-14 01:24:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619273888] [2025-04-14 01:24:14,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:24:14,467 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:24:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:24:14,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:24:14,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:24:14,467 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:24:14,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1467 transitions, 31015 flow. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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) [2025-04-14 01:24:14,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:24:14,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:24:14,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:24:17,278 INFO L116 PetriNetUnfolderBase]: 6164/9064 cut-off events. [2025-04-14 01:24:17,279 INFO L117 PetriNetUnfolderBase]: For 300677/300677 co-relation queries the response was YES. [2025-04-14 01:24:17,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100578 conditions, 9064 events. 6164/9064 cut-off events. For 300677/300677 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 51109 event pairs, 813 based on Foata normal form. 56/9120 useless extension candidates. Maximal degree in co-relation 100409. Up to 4758 conditions per place. [2025-04-14 01:24:17,450 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1153 selfloop transitions, 475 changer transitions 0/1628 dead transitions. [2025-04-14 01:24:17,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1628 transitions, 37430 flow [2025-04-14 01:24:17,450 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:24:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:24:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 89 transitions. [2025-04-14 01:24:17,451 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3423076923076923 [2025-04-14 01:24:17,451 INFO L175 Difference]: Start difference. First operand has 469 places, 1467 transitions, 31015 flow. Second operand 10 states and 89 transitions. [2025-04-14 01:24:17,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1628 transitions, 37430 flow [2025-04-14 01:24:21,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1628 transitions, 36691 flow, removed 93 selfloop flow, removed 6 redundant places. [2025-04-14 01:24:21,171 INFO L231 Difference]: Finished difference. Result has 473 places, 1481 transitions, 31554 flow [2025-04-14 01:24:21,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=30276, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=992, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=31554, PETRI_PLACES=473, PETRI_TRANSITIONS=1481} [2025-04-14 01:24:21,172 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 445 predicate places. [2025-04-14 01:24:21,173 INFO L485 AbstractCegarLoop]: Abstraction has has 473 places, 1481 transitions, 31554 flow [2025-04-14 01:24:21,173 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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) [2025-04-14 01:24:21,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:24:21,173 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:24:21,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2025-04-14 01:24:21,373 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:21,373 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:24:21,374 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:24:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash 522606726, now seen corresponding path program 20 times [2025-04-14 01:24:21,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:24:21,374 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731850195] [2025-04-14 01:24:21,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:24:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:24:21,377 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:21,380 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:21,380 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:24:21,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:24:21,442 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731850195] [2025-04-14 01:24:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731850195] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:24:21,443 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245902752] [2025-04-14 01:24:21,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:24:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:24:21,444 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:24:21,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-04-14 01:24:21,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:21,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:21,508 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:24:21,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:21,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:24:21,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:24:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:21,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:24:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245902752] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:24:21,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:24:21,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 01:24:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986831671] [2025-04-14 01:24:21,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:24:21,648 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:24:21,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:24:21,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:24:21,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:24:21,648 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:24:21,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1481 transitions, 31554 flow. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 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) [2025-04-14 01:24:21,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:24:21,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:24:21,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:24:24,735 INFO L116 PetriNetUnfolderBase]: 6799/10015 cut-off events. [2025-04-14 01:24:24,735 INFO L117 PetriNetUnfolderBase]: For 342940/342940 co-relation queries the response was YES. [2025-04-14 01:24:24,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112132 conditions, 10015 events. 6799/10015 cut-off events. For 342940/342940 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 57587 event pairs, 802 based on Foata normal form. 101/10116 useless extension candidates. Maximal degree in co-relation 111962. Up to 4712 conditions per place. [2025-04-14 01:24:24,905 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1135 selfloop transitions, 715 changer transitions 0/1850 dead transitions. [2025-04-14 01:24:24,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 1850 transitions, 42995 flow [2025-04-14 01:24:24,905 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 01:24:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 01:24:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 173 transitions. [2025-04-14 01:24:24,906 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3914027149321267 [2025-04-14 01:24:24,906 INFO L175 Difference]: Start difference. First operand has 473 places, 1481 transitions, 31554 flow. Second operand 17 states and 173 transitions. [2025-04-14 01:24:24,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 1850 transitions, 42995 flow [2025-04-14 01:24:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1850 transitions, 42191 flow, removed 21 selfloop flow, removed 6 redundant places. [2025-04-14 01:24:29,182 INFO L231 Difference]: Finished difference. Result has 488 places, 1609 transitions, 35957 flow [2025-04-14 01:24:29,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=30700, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=35957, PETRI_PLACES=488, PETRI_TRANSITIONS=1609} [2025-04-14 01:24:29,189 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 460 predicate places. [2025-04-14 01:24:29,189 INFO L485 AbstractCegarLoop]: Abstraction has has 488 places, 1609 transitions, 35957 flow [2025-04-14 01:24:29,189 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 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) [2025-04-14 01:24:29,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:24:29,189 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:24:29,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-04-14 01:24:29,390 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:29,390 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:24:29,391 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:24:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash -356485768, now seen corresponding path program 21 times [2025-04-14 01:24:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:24:29,391 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172875652] [2025-04-14 01:24:29,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:24:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:24:29,398 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:29,401 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:29,401 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:24:29,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:29,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:24:29,457 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172875652] [2025-04-14 01:24:29,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172875652] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:24:29,458 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096371495] [2025-04-14 01:24:29,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:24:29,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:29,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:24:29,459 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:24:29,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-04-14 01:24:29,507 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:29,521 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:29,521 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:24:29,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:29,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:24:29,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:24:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:29,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:24:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:29,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096371495] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:24:29,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:24:29,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 01:24:29,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410957795] [2025-04-14 01:24:29,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:24:29,651 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:24:29,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:24:29,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:24:29,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:24:29,652 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:24:29,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 1609 transitions, 35957 flow. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 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) [2025-04-14 01:24:29,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:24:29,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:24:29,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:24:33,346 INFO L116 PetriNetUnfolderBase]: 7412/10873 cut-off events. [2025-04-14 01:24:33,347 INFO L117 PetriNetUnfolderBase]: For 404121/404121 co-relation queries the response was YES. [2025-04-14 01:24:33,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126836 conditions, 10873 events. 7412/10873 cut-off events. For 404121/404121 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 62742 event pairs, 391 based on Foata normal form. 31/10904 useless extension candidates. Maximal degree in co-relation 126660. Up to 4494 conditions per place. [2025-04-14 01:24:33,505 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1053 selfloop transitions, 981 changer transitions 0/2034 dead transitions. [2025-04-14 01:24:33,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 2034 transitions, 49885 flow [2025-04-14 01:24:33,506 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:24:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:24:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 189 transitions. [2025-04-14 01:24:33,506 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2025-04-14 01:24:33,506 INFO L175 Difference]: Start difference. First operand has 488 places, 1609 transitions, 35957 flow. Second operand 18 states and 189 transitions. [2025-04-14 01:24:33,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 2034 transitions, 49885 flow [2025-04-14 01:24:37,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 2034 transitions, 48810 flow, removed 410 selfloop flow, removed 8 redundant places. [2025-04-14 01:24:37,984 INFO L231 Difference]: Finished difference. Result has 498 places, 1702 transitions, 40353 flow [2025-04-14 01:24:37,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34933, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=40353, PETRI_PLACES=498, PETRI_TRANSITIONS=1702} [2025-04-14 01:24:37,985 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 470 predicate places. [2025-04-14 01:24:37,985 INFO L485 AbstractCegarLoop]: Abstraction has has 498 places, 1702 transitions, 40353 flow [2025-04-14 01:24:37,985 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 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) [2025-04-14 01:24:37,985 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:24:37,985 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:24:37,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-04-14 01:24:38,186 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2025-04-14 01:24:38,186 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:24:38,186 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:24:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1752367342, now seen corresponding path program 22 times [2025-04-14 01:24:38,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:24:38,187 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980874925] [2025-04-14 01:24:38,187 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:24:38,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:24:38,191 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:38,192 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-04-14 01:24:38,192 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:24:38,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:24:38,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:24:38,236 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980874925] [2025-04-14 01:24:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980874925] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:24:38,236 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488882499] [2025-04-14 01:24:38,236 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:24:38,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:38,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:24:38,238 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:24:38,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-04-14 01:24:38,287 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:38,296 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-04-14 01:24:38,296 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-14 01:24:38,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:38,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:24:38,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:24:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:24:38,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:24:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:24:38,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488882499] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:24:38,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:24:38,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-04-14 01:24:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438011224] [2025-04-14 01:24:38,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:24:38,382 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:24:38,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:24:38,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:24:38,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:24:38,382 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:24:38,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1702 transitions, 40353 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 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) [2025-04-14 01:24:38,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:24:38,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:24:38,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:24:42,547 INFO L116 PetriNetUnfolderBase]: 7404/10857 cut-off events. [2025-04-14 01:24:42,547 INFO L117 PetriNetUnfolderBase]: For 410680/410680 co-relation queries the response was YES. [2025-04-14 01:24:42,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129767 conditions, 10857 events. 7404/10857 cut-off events. For 410680/410680 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 62861 event pairs, 393 based on Foata normal form. 6/10863 useless extension candidates. Maximal degree in co-relation 129587. Up to 4486 conditions per place. [2025-04-14 01:24:42,706 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1335 selfloop transitions, 489 changer transitions 0/1824 dead transitions. [2025-04-14 01:24:42,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1824 transitions, 46009 flow [2025-04-14 01:24:42,707 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:24:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:24:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 190 transitions. [2025-04-14 01:24:42,707 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2025-04-14 01:24:42,708 INFO L175 Difference]: Start difference. First operand has 498 places, 1702 transitions, 40353 flow. Second operand 18 states and 190 transitions. [2025-04-14 01:24:42,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1824 transitions, 46009 flow [2025-04-14 01:24:47,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1824 transitions, 43858 flow, removed 451 selfloop flow, removed 10 redundant places. [2025-04-14 01:24:47,562 INFO L231 Difference]: Finished difference. Result has 505 places, 1700 transitions, 39208 flow [2025-04-14 01:24:47,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=38212, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=39208, PETRI_PLACES=505, PETRI_TRANSITIONS=1700} [2025-04-14 01:24:47,563 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 477 predicate places. [2025-04-14 01:24:47,563 INFO L485 AbstractCegarLoop]: Abstraction has has 505 places, 1700 transitions, 39208 flow [2025-04-14 01:24:47,563 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 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) [2025-04-14 01:24:47,563 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:24:47,564 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:24:47,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-04-14 01:24:47,764 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2025-04-14 01:24:47,764 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:24:47,765 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:24:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1148503954, now seen corresponding path program 23 times [2025-04-14 01:24:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:24:47,765 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332664801] [2025-04-14 01:24:47,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:24:47,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:24:47,768 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:47,770 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:47,771 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:24:47,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:24:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:24:47,816 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332664801] [2025-04-14 01:24:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332664801] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:24:47,817 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320311603] [2025-04-14 01:24:47,817 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:24:47,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:24:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:24:47,818 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:24:47,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-04-14 01:24:47,865 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:24:47,878 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:24:47,879 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:24:47,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:24:47,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:24:47,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:24:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:24:47,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:24:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:24:48,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320311603] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:24:48,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:24:48,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2025-04-14 01:24:48,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518684191] [2025-04-14 01:24:48,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:24:48,002 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 01:24:48,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:24:48,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 01:24:48,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2025-04-14 01:24:48,002 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:24:48,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1700 transitions, 39208 flow. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 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) [2025-04-14 01:24:48,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:24:48,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:24:48,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:24:54,484 INFO L116 PetriNetUnfolderBase]: 10507/15157 cut-off events. [2025-04-14 01:24:54,484 INFO L117 PetriNetUnfolderBase]: For 558032/558032 co-relation queries the response was YES. [2025-04-14 01:24:54,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182369 conditions, 15157 events. 10507/15157 cut-off events. For 558032/558032 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 88765 event pairs, 175 based on Foata normal form. 132/15289 useless extension candidates. Maximal degree in co-relation 182189. Up to 7129 conditions per place. [2025-04-14 01:24:54,727 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 942 selfloop transitions, 1813 changer transitions 0/2755 dead transitions. [2025-04-14 01:24:54,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 2755 transitions, 67706 flow [2025-04-14 01:24:54,728 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2025-04-14 01:24:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2025-04-14 01:24:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 816 transitions. [2025-04-14 01:24:54,729 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3526361279170268 [2025-04-14 01:24:54,729 INFO L175 Difference]: Start difference. First operand has 505 places, 1700 transitions, 39208 flow. Second operand 89 states and 816 transitions. [2025-04-14 01:24:54,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 2755 transitions, 67706 flow [2025-04-14 01:25:01,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 2755 transitions, 66541 flow, removed 62 selfloop flow, removed 9 redundant places. [2025-04-14 01:25:01,764 INFO L231 Difference]: Finished difference. Result has 604 places, 2235 transitions, 57177 flow [2025-04-14 01:25:01,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=37987, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=57177, PETRI_PLACES=604, PETRI_TRANSITIONS=2235} [2025-04-14 01:25:01,766 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 576 predicate places. [2025-04-14 01:25:01,766 INFO L485 AbstractCegarLoop]: Abstraction has has 604 places, 2235 transitions, 57177 flow [2025-04-14 01:25:01,766 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 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) [2025-04-14 01:25:01,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:25:01,766 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:25:01,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-04-14 01:25:01,966 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:25:01,967 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:25:01,967 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:25:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash 911898627, now seen corresponding path program 14 times [2025-04-14 01:25:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:25:01,968 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982562124] [2025-04-14 01:25:01,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:25:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:25:01,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:25:01,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:25:01,976 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:25:01,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:25:02,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:25:02,023 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982562124] [2025-04-14 01:25:02,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982562124] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:25:02,023 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171310246] [2025-04-14 01:25:02,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:25:02,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:25:02,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:25:02,025 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:25:02,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-04-14 01:25:02,073 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:25:02,087 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:25:02,087 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:25:02,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:02,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:25:02,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:25:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:25:02,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:25:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:25:02,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171310246] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:25:02,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:25:02,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 01:25:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856586122] [2025-04-14 01:25:02,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:25:02,211 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:25:02,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:25:02,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:25:02,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:25:02,212 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:25:02,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 2235 transitions, 57177 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 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) [2025-04-14 01:25:02,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:25:02,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:25:02,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:25:08,128 INFO L116 PetriNetUnfolderBase]: 10253/14667 cut-off events. [2025-04-14 01:25:08,128 INFO L117 PetriNetUnfolderBase]: For 680122/680122 co-relation queries the response was YES. [2025-04-14 01:25:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192422 conditions, 14667 events. 10253/14667 cut-off events. For 680122/680122 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 84066 event pairs, 1374 based on Foata normal form. 178/14845 useless extension candidates. Maximal degree in co-relation 192220. Up to 8870 conditions per place. [2025-04-14 01:25:08,452 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1580 selfloop transitions, 926 changer transitions 0/2506 dead transitions. [2025-04-14 01:25:08,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 2506 transitions, 69102 flow [2025-04-14 01:25:08,453 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 01:25:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 01:25:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 147 transitions. [2025-04-14 01:25:08,454 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2025-04-14 01:25:08,454 INFO L175 Difference]: Start difference. First operand has 604 places, 2235 transitions, 57177 flow. Second operand 15 states and 147 transitions. [2025-04-14 01:25:08,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 2506 transitions, 69102 flow [2025-04-14 01:25:19,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 2506 transitions, 62049 flow, removed 2299 selfloop flow, removed 25 redundant places. [2025-04-14 01:25:19,284 INFO L231 Difference]: Finished difference. Result has 592 places, 2205 transitions, 52022 flow [2025-04-14 01:25:19,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=49925, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=914, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=52022, PETRI_PLACES=592, PETRI_TRANSITIONS=2205} [2025-04-14 01:25:19,285 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 564 predicate places. [2025-04-14 01:25:19,285 INFO L485 AbstractCegarLoop]: Abstraction has has 592 places, 2205 transitions, 52022 flow [2025-04-14 01:25:19,285 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 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) [2025-04-14 01:25:19,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:25:19,286 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:25:19,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2025-04-14 01:25:19,486 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2025-04-14 01:25:19,486 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:25:19,486 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:25:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 504539778, now seen corresponding path program 24 times [2025-04-14 01:25:19,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:25:19,487 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992734508] [2025-04-14 01:25:19,487 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:25:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:25:19,490 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:25:19,493 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:25:19,493 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:25:19,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:25:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:25:19,550 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992734508] [2025-04-14 01:25:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992734508] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:25:19,550 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822426802] [2025-04-14 01:25:19,550 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:25:19,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:25:19,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:25:19,551 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:25:19,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-04-14 01:25:19,606 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-04-14 01:25:19,619 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-14 01:25:19,619 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:25:19,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:19,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:25:19,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:25:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:25:19,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:25:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:25:19,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822426802] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:25:19,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:25:19,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 01:25:19,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120741876] [2025-04-14 01:25:19,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:25:19,743 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:25:19,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:25:19,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:25:19,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:25:19,744 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:25:19,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 2205 transitions, 52022 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2025-04-14 01:25:19,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:25:19,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:25:19,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:25:25,319 INFO L116 PetriNetUnfolderBase]: 10203/14581 cut-off events. [2025-04-14 01:25:25,320 INFO L117 PetriNetUnfolderBase]: For 599878/599878 co-relation queries the response was YES. [2025-04-14 01:25:25,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180706 conditions, 14581 events. 10203/14581 cut-off events. For 599878/599878 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 82990 event pairs, 1724 based on Foata normal form. 36/14617 useless extension candidates. Maximal degree in co-relation 180514. Up to 10335 conditions per place. [2025-04-14 01:25:25,556 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1625 selfloop transitions, 630 changer transitions 0/2255 dead transitions. [2025-04-14 01:25:25,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 2255 transitions, 57453 flow [2025-04-14 01:25:25,557 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:25:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:25:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 112 transitions. [2025-04-14 01:25:25,557 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2025-04-14 01:25:25,557 INFO L175 Difference]: Start difference. First operand has 592 places, 2205 transitions, 52022 flow. Second operand 12 states and 112 transitions. [2025-04-14 01:25:25,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 2255 transitions, 57453 flow [2025-04-14 01:25:33,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 2255 transitions, 55045 flow, removed 75 selfloop flow, removed 16 redundant places. [2025-04-14 01:25:34,026 INFO L231 Difference]: Finished difference. Result has 586 places, 2184 transitions, 50409 flow [2025-04-14 01:25:34,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=49149, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=50409, PETRI_PLACES=586, PETRI_TRANSITIONS=2184} [2025-04-14 01:25:34,028 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 558 predicate places. [2025-04-14 01:25:34,028 INFO L485 AbstractCegarLoop]: Abstraction has has 586 places, 2184 transitions, 50409 flow [2025-04-14 01:25:34,028 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2025-04-14 01:25:34,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:25:34,028 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] [2025-04-14 01:25:34,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-04-14 01:25:34,228 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-04-14 01:25:34,228 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:25:34,229 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:25:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -192478907, now seen corresponding path program 15 times [2025-04-14 01:25:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:25:34,229 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620404291] [2025-04-14 01:25:34,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:25:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:25:34,233 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:25:34,244 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:25:34,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:25:34,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:25:34,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:25:34,569 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620404291] [2025-04-14 01:25:34,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620404291] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:25:34,569 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116680592] [2025-04-14 01:25:34,569 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:25:34,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:25:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:25:34,571 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:25:34,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-04-14 01:25:34,621 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:25:34,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:25:34,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:25:34,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:34,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:25:34,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:25:34,810 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:25:34,810 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2025-04-14 01:25:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:25:34,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:25:34,946 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:25:34,946 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 49 [2025-04-14 01:25:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:25:35,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116680592] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:25:35,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:25:35,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 26 [2025-04-14 01:25:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762642631] [2025-04-14 01:25:35,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:25:35,180 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 01:25:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:25:35,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 01:25:35,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2025-04-14 01:25:35,180 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:25:35,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 2184 transitions, 50409 flow. Second operand has 28 states, 28 states have (on average 5.535714285714286) internal successors, (155), 28 states have internal predecessors, (155), 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) [2025-04-14 01:25:35,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:25:35,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:25:35,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:25:43,054 INFO L116 PetriNetUnfolderBase]: 12497/17895 cut-off events. [2025-04-14 01:25:43,055 INFO L117 PetriNetUnfolderBase]: For 719538/719538 co-relation queries the response was YES. [2025-04-14 01:25:43,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219787 conditions, 17895 events. 12497/17895 cut-off events. For 719538/719538 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 105831 event pairs, 630 based on Foata normal form. 6/17901 useless extension candidates. Maximal degree in co-relation 219598. Up to 14165 conditions per place. [2025-04-14 01:25:43,423 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 1934 selfloop transitions, 970 changer transitions 1/2905 dead transitions. [2025-04-14 01:25:43,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 2905 transitions, 73162 flow [2025-04-14 01:25:43,424 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 01:25:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 01:25:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 280 transitions. [2025-04-14 01:25:43,425 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2025-04-14 01:25:43,425 INFO L175 Difference]: Start difference. First operand has 586 places, 2184 transitions, 50409 flow. Second operand 25 states and 280 transitions. [2025-04-14 01:25:43,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 2905 transitions, 73162 flow [2025-04-14 01:25:55,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 2905 transitions, 71380 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-04-14 01:25:55,447 INFO L231 Difference]: Finished difference. Result has 613 places, 2587 transitions, 62918 flow [2025-04-14 01:25:55,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=49192, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=62918, PETRI_PLACES=613, PETRI_TRANSITIONS=2587} [2025-04-14 01:25:55,449 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 585 predicate places. [2025-04-14 01:25:55,449 INFO L485 AbstractCegarLoop]: Abstraction has has 613 places, 2587 transitions, 62918 flow [2025-04-14 01:25:55,449 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.535714285714286) internal successors, (155), 28 states have internal predecessors, (155), 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) [2025-04-14 01:25:55,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:25:55,449 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] [2025-04-14 01:25:55,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2025-04-14 01:25:55,650 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:25:55,650 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:25:55,650 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:25:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -391671295, now seen corresponding path program 25 times [2025-04-14 01:25:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:25:55,651 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951516878] [2025-04-14 01:25:55,651 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:25:55,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:25:55,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-14 01:25:55,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:25:55,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:25:55,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:25:56,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:25:56,137 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951516878] [2025-04-14 01:25:56,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951516878] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:25:56,137 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938336970] [2025-04-14 01:25:56,137 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:25:56,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:25:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:25:56,139 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:25:56,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2025-04-14 01:25:56,195 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-14 01:25:56,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:25:56,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:25:56,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:25:56,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-14 01:25:56,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:25:56,264 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:25:56,539 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:25:56,539 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2025-04-14 01:25:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:25:56,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:25:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:25:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938336970] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:25:56,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:25:56,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 34 [2025-04-14 01:25:56,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433746660] [2025-04-14 01:25:56,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:25:56,837 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-04-14 01:25:56,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:25:56,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-04-14 01:25:56,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2025-04-14 01:25:56,838 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:25:56,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 2587 transitions, 62918 flow. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 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) [2025-04-14 01:25:56,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:25:56,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:25:56,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:26:06,139 INFO L116 PetriNetUnfolderBase]: 13116/18850 cut-off events. [2025-04-14 01:26:06,139 INFO L117 PetriNetUnfolderBase]: For 797815/797815 co-relation queries the response was YES. [2025-04-14 01:26:06,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240137 conditions, 18850 events. 13116/18850 cut-off events. For 797815/797815 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 113369 event pairs, 672 based on Foata normal form. 1/18851 useless extension candidates. Maximal degree in co-relation 239935. Up to 16194 conditions per place. [2025-04-14 01:26:06,612 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 2223 selfloop transitions, 764 changer transitions 2/2989 dead transitions. [2025-04-14 01:26:06,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 2989 transitions, 77681 flow [2025-04-14 01:26:06,613 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 01:26:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 01:26:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 221 transitions. [2025-04-14 01:26:06,613 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2025-04-14 01:26:06,613 INFO L175 Difference]: Start difference. First operand has 613 places, 2587 transitions, 62918 flow. Second operand 19 states and 221 transitions. [2025-04-14 01:26:06,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 2989 transitions, 77681 flow [2025-04-14 01:26:22,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 2989 transitions, 75110 flow, removed 1177 selfloop flow, removed 7 redundant places. [2025-04-14 01:26:22,425 INFO L231 Difference]: Finished difference. Result has 630 places, 2756 transitions, 66689 flow [2025-04-14 01:26:22,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=60565, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=66689, PETRI_PLACES=630, PETRI_TRANSITIONS=2756} [2025-04-14 01:26:22,426 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 602 predicate places. [2025-04-14 01:26:22,426 INFO L485 AbstractCegarLoop]: Abstraction has has 630 places, 2756 transitions, 66689 flow [2025-04-14 01:26:22,427 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 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) [2025-04-14 01:26:22,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:26:22,427 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:26:22,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2025-04-14 01:26:22,627 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:26:22,628 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:26:22,628 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:26:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1466763150, now seen corresponding path program 8 times [2025-04-14 01:26:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:26:22,628 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828960188] [2025-04-14 01:26:22,628 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:26:22,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:26:22,632 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:26:22,640 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:26:22,640 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:26:22,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:26:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:26:23,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:26:23,023 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828960188] [2025-04-14 01:26:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828960188] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:26:23,024 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310128524] [2025-04-14 01:26:23,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:26:23,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:26:23,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:26:23,025 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:26:23,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2025-04-14 01:26:23,079 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:26:23,100 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:26:23,100 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:26:23,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:26:23,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-14 01:26:23,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:26:23,143 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:26:23,387 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:26:23,387 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2025-04-14 01:26:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:26:23,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:26:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:26:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310128524] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:26:23,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:26:23,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 33 [2025-04-14 01:26:23,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776153898] [2025-04-14 01:26:23,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:26:23,709 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-04-14 01:26:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:26:23,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-04-14 01:26:23,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2025-04-14 01:26:23,709 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:26:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 2756 transitions, 66689 flow. Second operand has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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) [2025-04-14 01:26:23,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:26:23,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:26:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:26:33,352 INFO L116 PetriNetUnfolderBase]: 13421/19327 cut-off events. [2025-04-14 01:26:33,352 INFO L117 PetriNetUnfolderBase]: For 768422/768422 co-relation queries the response was YES. [2025-04-14 01:26:33,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241616 conditions, 19327 events. 13421/19327 cut-off events. For 768422/768422 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 116081 event pairs, 725 based on Foata normal form. 2/19329 useless extension candidates. Maximal degree in co-relation 241407. Up to 17055 conditions per place. [2025-04-14 01:26:33,800 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 2396 selfloop transitions, 660 changer transitions 4/3060 dead transitions. [2025-04-14 01:26:33,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 3060 transitions, 80517 flow [2025-04-14 01:26:33,801 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 01:26:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 01:26:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 199 transitions. [2025-04-14 01:26:33,802 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4502262443438914 [2025-04-14 01:26:33,802 INFO L175 Difference]: Start difference. First operand has 630 places, 2756 transitions, 66689 flow. Second operand 17 states and 199 transitions. [2025-04-14 01:26:33,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 3060 transitions, 80517 flow [2025-04-14 01:26:51,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 3060 transitions, 78912 flow, removed 496 selfloop flow, removed 8 redundant places. [2025-04-14 01:26:51,703 INFO L231 Difference]: Finished difference. Result has 642 places, 2867 transitions, 70622 flow [2025-04-14 01:26:51,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=65309, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=70622, PETRI_PLACES=642, PETRI_TRANSITIONS=2867} [2025-04-14 01:26:51,705 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 614 predicate places. [2025-04-14 01:26:51,705 INFO L485 AbstractCegarLoop]: Abstraction has has 642 places, 2867 transitions, 70622 flow [2025-04-14 01:26:51,705 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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) [2025-04-14 01:26:51,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:26:51,705 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:26:51,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2025-04-14 01:26:51,905 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-04-14 01:26:51,905 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:26:51,906 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:26:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1007041876, now seen corresponding path program 9 times [2025-04-14 01:26:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:26:51,906 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314540190] [2025-04-14 01:26:51,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:26:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:26:51,911 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:26:51,918 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:26:51,918 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:26:51,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:26:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:26:52,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:26:52,339 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314540190] [2025-04-14 01:26:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314540190] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:26:52,339 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559638021] [2025-04-14 01:26:52,339 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:26:52,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:26:52,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:26:52,341 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:26:52,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2025-04-14 01:26:52,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:26:52,415 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:26:52,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:26:52,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:26:52,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-14 01:26:52,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:26:52,458 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:26:52,662 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-14 01:26:52,666 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:26:52,666 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2025-04-14 01:26:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:26:52,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:26:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:26:52,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559638021] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:26:52,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:26:52,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 33 [2025-04-14 01:26:52,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353985128] [2025-04-14 01:26:52,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:26:52,950 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-04-14 01:26:52,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:26:52,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-04-14 01:26:52,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2025-04-14 01:26:52,951 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:26:52,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 2867 transitions, 70622 flow. Second operand has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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) [2025-04-14 01:26:52,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:26:52,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:26:52,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:27:03,790 INFO L116 PetriNetUnfolderBase]: 13559/19545 cut-off events. [2025-04-14 01:27:03,791 INFO L117 PetriNetUnfolderBase]: For 769448/769448 co-relation queries the response was YES. [2025-04-14 01:27:04,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242895 conditions, 19545 events. 13559/19545 cut-off events. For 769448/769448 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 117887 event pairs, 730 based on Foata normal form. 2/19547 useless extension candidates. Maximal degree in co-relation 242681. Up to 17123 conditions per place. [2025-04-14 01:27:04,229 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 2422 selfloop transitions, 697 changer transitions 8/3127 dead transitions. [2025-04-14 01:27:04,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 3127 transitions, 82061 flow [2025-04-14 01:27:04,230 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 01:27:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 01:27:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 256 transitions. [2025-04-14 01:27:04,231 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4280936454849498 [2025-04-14 01:27:04,231 INFO L175 Difference]: Start difference. First operand has 642 places, 2867 transitions, 70622 flow. Second operand 23 states and 256 transitions. [2025-04-14 01:27:04,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 3127 transitions, 82061 flow [2025-04-14 01:27:20,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 3127 transitions, 81049 flow, removed 67 selfloop flow, removed 6 redundant places. [2025-04-14 01:27:20,627 INFO L231 Difference]: Finished difference. Result has 663 places, 2904 transitions, 72342 flow [2025-04-14 01:27:20,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=69625, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=665, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=72342, PETRI_PLACES=663, PETRI_TRANSITIONS=2904} [2025-04-14 01:27:20,629 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 635 predicate places. [2025-04-14 01:27:20,629 INFO L485 AbstractCegarLoop]: Abstraction has has 663 places, 2904 transitions, 72342 flow [2025-04-14 01:27:20,629 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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) [2025-04-14 01:27:20,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:27:20,629 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:27:20,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2025-04-14 01:27:20,830 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:27:20,830 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:27:20,831 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:27:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1110455086, now seen corresponding path program 10 times [2025-04-14 01:27:20,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:27:20,831 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312148030] [2025-04-14 01:27:20,831 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:27:20,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:27:20,835 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:27:20,839 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:27:20,840 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:27:20,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:27:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:27:21,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:27:21,022 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312148030] [2025-04-14 01:27:21,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312148030] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:27:21,022 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645846696] [2025-04-14 01:27:21,022 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:27:21,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:27:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:27:21,024 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:27:21,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2025-04-14 01:27:21,079 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:27:21,100 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:27:21,100 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:27:21,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:27:21,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-14 01:27:21,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:27:21,130 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-14 01:27:21,304 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:27:21,304 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2025-04-14 01:27:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:27:21,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:27:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:27:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645846696] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:27:21,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:27:21,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 28 [2025-04-14 01:27:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110750206] [2025-04-14 01:27:21,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:27:21,513 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 01:27:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:27:21,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 01:27:21,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2025-04-14 01:27:21,514 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:27:21,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 2904 transitions, 72342 flow. Second operand has 30 states, 30 states have (on average 5.333333333333333) internal successors, (160), 30 states have internal predecessors, (160), 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) [2025-04-14 01:27:21,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:27:21,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:27:21,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:27:32,243 INFO L116 PetriNetUnfolderBase]: 13938/20084 cut-off events. [2025-04-14 01:27:32,243 INFO L117 PetriNetUnfolderBase]: For 824733/824733 co-relation queries the response was YES. [2025-04-14 01:27:32,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251724 conditions, 20084 events. 13938/20084 cut-off events. For 824733/824733 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 121708 event pairs, 732 based on Foata normal form. 2/20086 useless extension candidates. Maximal degree in co-relation 251505. Up to 17490 conditions per place. [2025-04-14 01:27:32,750 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 2433 selfloop transitions, 791 changer transitions 4/3228 dead transitions. [2025-04-14 01:27:32,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 3228 transitions, 85368 flow [2025-04-14 01:27:32,750 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 01:27:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 01:27:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 251 transitions. [2025-04-14 01:27:32,751 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2025-04-14 01:27:32,751 INFO L175 Difference]: Start difference. First operand has 663 places, 2904 transitions, 72342 flow. Second operand 22 states and 251 transitions. [2025-04-14 01:27:32,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 3228 transitions, 85368 flow [2025-04-14 01:27:51,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 3228 transitions, 84017 flow, removed 208 selfloop flow, removed 15 redundant places. [2025-04-14 01:27:51,194 INFO L231 Difference]: Finished difference. Result has 673 places, 3020 transitions, 75916 flow [2025-04-14 01:27:51,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70986, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=75916, PETRI_PLACES=673, PETRI_TRANSITIONS=3020} [2025-04-14 01:27:51,196 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 645 predicate places. [2025-04-14 01:27:51,196 INFO L485 AbstractCegarLoop]: Abstraction has has 673 places, 3020 transitions, 75916 flow [2025-04-14 01:27:51,196 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.333333333333333) internal successors, (160), 30 states have internal predecessors, (160), 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) [2025-04-14 01:27:51,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:27:51,196 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] [2025-04-14 01:27:51,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2025-04-14 01:27:51,397 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2025-04-14 01:27:51,397 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:27:51,397 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:27:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1784191475, now seen corresponding path program 26 times [2025-04-14 01:27:51,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:27:51,398 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793508550] [2025-04-14 01:27:51,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:27:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:27:51,402 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:27:51,410 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:27:51,410 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:27:51,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:27:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:27:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:27:51,911 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793508550] [2025-04-14 01:27:51,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793508550] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:27:51,911 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877589320] [2025-04-14 01:27:51,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:27:51,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:27:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:27:51,913 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:27:51,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2025-04-14 01:27:51,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:27:51,988 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:27:51,988 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:27:51,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:27:51,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-04-14 01:27:51,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:27:52,230 INFO L325 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2025-04-14 01:27:52,230 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 35 [2025-04-14 01:27:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:27:52,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:27:52,487 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:27:52,487 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 51 [2025-04-14 01:27:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:27:55,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877589320] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:27:55,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:27:55,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2025-04-14 01:27:55,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784537774] [2025-04-14 01:27:55,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:27:55,003 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-04-14 01:27:55,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:27:55,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-04-14 01:27:55,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2025-04-14 01:27:55,004 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-04-14 01:27:55,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 3020 transitions, 75916 flow. Second operand has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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) [2025-04-14 01:27:55,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:27:55,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-04-14 01:27:55,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:28:09,226 INFO L116 PetriNetUnfolderBase]: 15155/21934 cut-off events. [2025-04-14 01:28:09,227 INFO L117 PetriNetUnfolderBase]: For 966787/966787 co-relation queries the response was YES. [2025-04-14 01:28:09,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280739 conditions, 21934 events. 15155/21934 cut-off events. For 966787/966787 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 136299 event pairs, 716 based on Foata normal form. 6/21940 useless extension candidates. Maximal degree in co-relation 280514. Up to 16924 conditions per place. [2025-04-14 01:28:10,042 INFO L140 encePairwiseOnDemand]: 13/26 looper letters, 2312 selfloop transitions, 1337 changer transitions 12/3661 dead transitions. [2025-04-14 01:28:10,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 3661 transitions, 98149 flow [2025-04-14 01:28:10,043 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-14 01:28:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-04-14 01:28:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 461 transitions. [2025-04-14 01:28:10,043 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41234347048300535 [2025-04-14 01:28:10,043 INFO L175 Difference]: Start difference. First operand has 673 places, 3020 transitions, 75916 flow. Second operand 43 states and 461 transitions. [2025-04-14 01:28:10,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 3661 transitions, 98149 flow [2025-04-14 01:28:31,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 3661 transitions, 96580 flow, removed 383 selfloop flow, removed 13 redundant places. [2025-04-14 01:28:31,659 INFO L231 Difference]: Finished difference. Result has 722 places, 3256 transitions, 85759 flow [2025-04-14 01:28:31,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=74599, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3020, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=85759, PETRI_PLACES=722, PETRI_TRANSITIONS=3256} [2025-04-14 01:28:31,661 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 694 predicate places. [2025-04-14 01:28:31,661 INFO L485 AbstractCegarLoop]: Abstraction has has 722 places, 3256 transitions, 85759 flow [2025-04-14 01:28:31,662 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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) [2025-04-14 01:28:31,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:28:31,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:28:31,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2025-04-14 01:28:31,862 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2025-04-14 01:28:31,862 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:28:31,863 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:28:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash 382464746, now seen corresponding path program 11 times [2025-04-14 01:28:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:28:31,863 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511725895] [2025-04-14 01:28:31,864 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:28:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:28:31,869 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:28:31,885 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:28:31,885 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:28:31,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:28:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:28:32,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:28:32,239 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511725895] [2025-04-14 01:28:32,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511725895] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:28:32,239 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450688943] [2025-04-14 01:28:32,239 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:28:32,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:28:32,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:28:32,241 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:28:32,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2025-04-14 01:28:32,302 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-14 01:28:32,330 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:28:32,330 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:28:32,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:28:32,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-04-14 01:28:32,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:28:32,368 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:28:32,403 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2025-04-14 01:28:32,903 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:28:32,903 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 28 [2025-04-14 01:28:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:28:32,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:28:33,500 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2025-04-14 01:28:33,521 INFO L325 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2025-04-14 01:28:33,522 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7586 treesize of output 6698 [2025-04-14 01:29:12,149 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:29:38,178 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:29:43,670 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:29:43,882 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:29:47,230 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:30:05,628 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:30:05,980 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:30:06,218 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:30:14,667 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:30:59,218 WARN L286 SmtUtils]: Spent 12.21s on a formula simplification. DAG size of input: 16 DAG size of output: 15 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:31:38,758 WARN L286 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 13 DAG size of output: 11 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:31:52,266 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:52,573 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:31:52,701 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:52,814 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:52,902 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:53,023 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:53,110 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:53,227 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:53,351 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:53,457 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:53,563 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:53,653 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:53,737 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:54,584 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:55,082 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:55,361 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:55,532 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:55,632 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:55,762 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:55,973 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:57,503 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:57,826 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:58,186 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:58,293 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:58,380 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:58,515 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:58,621 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:58,743 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:58,838 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:31:58,965 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:59,046 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:59,152 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:59,226 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:31:59,326 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:59,904 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:31:59,978 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:00,352 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:00,496 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:00,566 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:00,741 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:00,862 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:00,938 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:01,041 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:01,116 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:01,275 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:01,358 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:01,440 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:01,518 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:01,671 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:01,757 WARN L656 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2025-04-14 01:32:01,889 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:01,973 WARN L656 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2025-04-14 01:32:02,102 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:02,210 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:02,340 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:02,448 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:02,552 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:02,678 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:02,758 WARN L656 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2025-04-14 01:32:02,855 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:03,130 WARN L656 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2025-04-14 01:32:03,245 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:03,327 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:03,518 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:03,814 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:32:45,539 WARN L286 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 11 DAG size of output: 1 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:33:10,003 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:33:13,330 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:33:13,359 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:33:31,683 WARN L286 SmtUtils]: Spent 11.22s on a formula simplification. DAG size of input: 14 DAG size of output: 11 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:33:37,958 WARN L286 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 15 DAG size of output: 1 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:33:46,377 WARN L286 SmtUtils]: Spent 7.44s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:34:11,830 WARN L286 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 15 DAG size of output: 1 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:34:18,056 WARN L286 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:34:30,379 WARN L286 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 01:34:40,178 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Received shutdown request... [2025-04-14 01:34:40,272 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:34:40,272 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:34:40,284 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-14 01:34:40,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2025-04-14 01:34:40,488 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:34:40,489 WARN L610 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ∧-24-2-4-3-2-2-1 context. [2025-04-14 01:34:40,491 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-14 01:34:40,491 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-14 01:34:40,491 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-14 01:34:40,492 INFO L422 BasicCegarLoop]: Path program histogram: [26, 15, 11, 7, 1, 1, 1, 1, 1] [2025-04-14 01:34:40,497 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 01:34:40,497 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 01:34:40,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 01:34:40 BasicIcfg [2025-04-14 01:34:40,501 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 01:34:40,502 INFO L158 Benchmark]: Toolchain (without parser) took 824002.02ms. Allocated memory was 142.6MB in the beginning and 444.6MB in the end (delta: 302.0MB). Free memory was 100.9MB in the beginning and 209.9MB in the end (delta: -109.0MB). Peak memory consumption was 4.3GB. Max. memory is 8.0GB. [2025-04-14 01:34:40,502 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:34:40,502 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.76ms. Allocated memory is still 142.6MB. Free memory was 100.9MB in the beginning and 85.5MB in the end (delta: 15.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-14 01:34:40,502 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.32ms. Allocated memory is still 142.6MB. Free memory was 85.5MB in the beginning and 84.1MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 01:34:40,502 INFO L158 Benchmark]: Boogie Preprocessor took 36.99ms. Allocated memory is still 142.6MB. Free memory was 84.1MB in the beginning and 82.0MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:34:40,502 INFO L158 Benchmark]: IcfgBuilder took 501.12ms. Allocated memory is still 142.6MB. Free memory was 82.0MB in the beginning and 38.0MB in the end (delta: 44.0MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. [2025-04-14 01:34:40,503 INFO L158 Benchmark]: TraceAbstraction took 823146.61ms. Allocated memory was 142.6MB in the beginning and 444.6MB in the end (delta: 302.0MB). Free memory was 37.4MB in the beginning and 209.9MB in the end (delta: -172.5MB). Peak memory consumption was 4.2GB. Max. memory is 8.0GB. [2025-04-14 01:34:40,504 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 271.76ms. Allocated memory is still 142.6MB. Free memory was 100.9MB in the beginning and 85.5MB in the end (delta: 15.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.32ms. Allocated memory is still 142.6MB. Free memory was 85.5MB in the beginning and 84.1MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.99ms. Allocated memory is still 142.6MB. Free memory was 84.1MB in the beginning and 82.0MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 501.12ms. Allocated memory is still 142.6MB. Free memory was 82.0MB in the beginning and 38.0MB in the end (delta: 44.0MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. * TraceAbstraction took 823146.61ms. Allocated memory was 142.6MB in the beginning and 444.6MB in the end (delta: 302.0MB). Free memory was 37.4MB in the beginning and 209.9MB in the end (delta: -172.5MB). Peak memory consumption was 4.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ∧-24-2-4-3-2-2-1 context. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ∧-24-2-4-3-2-2-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ∧-24-2-4-3-2-2-1 context. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ∧-24-2-4-3-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 35 locations, 41 edges, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 823.1s, OverallIterations: 64, TraceHistogramMax: 3, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 400.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6536 SdHoareTripleChecker+Valid, 20.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6536 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 17.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 469 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 42637 IncrementalHoareTripleChecker+Invalid, 43106 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 469 mSolverCounterUnsat, 0 mSDtfsCounter, 42637 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3604 GetRequests, 1892 SyntacticMatches, 91 SemanticMatches, 1621 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16649 ImplicationChecksByTransitivity, 20.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85759occurred in iteration=63, InterpolantAutomatonStates: 1012, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 37.1s InterpolantComputationTime, 2657 NumberOfCodeBlocks, 2621 NumberOfCodeBlocksAsserted, 206 NumberOfCheckSat, 3767 ConstructedInterpolants, 136 QuantifiedInterpolants, 36180 SizeOfPredicates, 343 NumberOfNonLiveVariables, 10705 ConjunctsInSsa, 1094 ConjunctsInUnsatCore, 181 InterpolantComputations, 10 PerfectInterpolantSequences, 338/837 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown