/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-array-sum-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 01:07:55,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 01:07:55,853 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 01:07:55,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 01:07:55,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 01:07:55,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 01:07:55,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 01:07:55,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 01:07:55,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 01:07:55,883 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 01:07:55,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 01:07:55,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 01:07:55,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 01:07:55,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 01:07:55,883 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 01:07:55,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 01:07:55,883 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 01:07:55,883 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 01:07:55,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 01:07:55,884 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:07:55,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:07:55,884 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:07:55,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 01:07:55,885 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 01:07:55,885 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 01:07:56,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 01:07:56,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 01:07:56,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 01:07:56,125 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 01:07:56,126 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 01:07:56,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2025-04-14 01:07:57,436 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0f071ea8/a4c7558df97149b9bcfa5aebf99766f1/FLAG4edd5db63 [2025-04-14 01:07:57,625 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 01:07:57,625 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2025-04-14 01:07:57,636 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0f071ea8/a4c7558df97149b9bcfa5aebf99766f1/FLAG4edd5db63 [2025-04-14 01:07:58,486 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0f071ea8/a4c7558df97149b9bcfa5aebf99766f1 [2025-04-14 01:07:58,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 01:07:58,489 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 01:07:58,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 01:07:58,490 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 01:07:58,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 01:07:58,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276ccca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58, skipping insertion in model container [2025-04-14 01:07:58,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,506 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 01:07:58,648 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-array-sum-alt.wvr.c[2368,2381] [2025-04-14 01:07:58,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:07:58,661 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 01:07:58,680 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-array-sum-alt.wvr.c[2368,2381] [2025-04-14 01:07:58,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:07:58,701 INFO L204 MainTranslator]: Completed translation [2025-04-14 01:07:58,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58 WrapperNode [2025-04-14 01:07:58,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 01:07:58,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 01:07:58,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 01:07:58,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 01:07:58,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,718 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,737 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 172 [2025-04-14 01:07:58,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 01:07:58,738 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 01:07:58,738 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 01:07:58,738 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 01:07:58,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,746 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,760 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 01:07:58,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,761 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,765 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,766 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,766 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 01:07:58,774 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 01:07:58,774 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 01:07:58,774 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 01:07:58,775 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (1/1) ... [2025-04-14 01:07:58,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:07:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:07:58,801 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 01:07:58,804 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 01:07:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 01:07:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 01:07:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-14 01:07:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 01:07:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-14 01:07:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-14 01:07:58,820 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 01:07:58,913 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 01:07:58,915 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 01:07:59,200 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 01:07:59,201 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 01:07:59,201 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 01:07:59,501 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 01:07:59,504 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 01:07:59,510 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 01:07:59,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:07:59 BoogieIcfgContainer [2025-04-14 01:07:59,510 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 01:07:59,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 01:07:59,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 01:07:59,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 01:07:59,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 01:07:58" (1/3) ... [2025-04-14 01:07:59,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b786cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:07:59, skipping insertion in model container [2025-04-14 01:07:59,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:07:58" (2/3) ... [2025-04-14 01:07:59,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b786cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:07:59, skipping insertion in model container [2025-04-14 01:07:59,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:07:59" (3/3) ... [2025-04-14 01:07:59,517 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2025-04-14 01:07:59,527 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 01:07:59,528 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt.wvr.c that has 4 procedures, 25 locations, 27 edges, 1 initial locations, 4 loop locations, and 1 error locations. [2025-04-14 01:07:59,529 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 01:07:59,577 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-14 01:07:59,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 30 transitions, 81 flow [2025-04-14 01:07:59,629 INFO L116 PetriNetUnfolderBase]: 6/27 cut-off events. [2025-04-14 01:07:59,632 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 01:07:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 27 events. 6/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-04-14 01:07:59,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 30 transitions, 81 flow [2025-04-14 01:07:59,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 26 transitions, 70 flow [2025-04-14 01:07:59,644 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:07:59,654 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;@491ef992, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:07:59,654 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-14 01:07:59,666 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:07:59,667 INFO L116 PetriNetUnfolderBase]: 6/25 cut-off events. [2025-04-14 01:07:59,667 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 01:07:59,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:07:59,667 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:07:59,667 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 01:07:59,671 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:07:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash 831611834, now seen corresponding path program 1 times [2025-04-14 01:07:59,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:07:59,679 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218767516] [2025-04-14 01:07:59,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:07:59,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:07:59,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 01:07:59,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:07:59,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:07:59,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:00,268 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 01:08:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:00,270 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218767516] [2025-04-14 01:08:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218767516] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:08:00,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:08:00,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 01:08:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453633879] [2025-04-14 01:08:00,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:00,278 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:08:00,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:00,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:08:00,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-04-14 01:08:00,301 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:00,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 01:08:00,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:00,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:00,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:00,641 INFO L116 PetriNetUnfolderBase]: 715/1016 cut-off events. [2025-04-14 01:08:00,641 INFO L117 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2025-04-14 01:08:00,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 1016 events. 715/1016 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3807 event pairs, 20 based on Foata normal form. 1/718 useless extension candidates. Maximal degree in co-relation 2002. Up to 629 conditions per place. [2025-04-14 01:08:00,652 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 68 selfloop transitions, 13 changer transitions 1/82 dead transitions. [2025-04-14 01:08:00,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 82 transitions, 388 flow [2025-04-14 01:08:00,653 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 01:08:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 01:08:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-04-14 01:08:00,661 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2025-04-14 01:08:00,662 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 70 flow. Second operand 6 states and 101 transitions. [2025-04-14 01:08:00,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 82 transitions, 388 flow [2025-04-14 01:08:00,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 82 transitions, 348 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-14 01:08:00,670 INFO L231 Difference]: Finished difference. Result has 32 places, 38 transitions, 132 flow [2025-04-14 01:08:00,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=32, PETRI_TRANSITIONS=38} [2025-04-14 01:08:00,675 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2025-04-14 01:08:00,676 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 38 transitions, 132 flow [2025-04-14 01:08:00,676 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 01:08:00,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:00,676 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:08:00,676 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 01:08:00,677 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 01:08:00,677 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1575544523, now seen corresponding path program 1 times [2025-04-14 01:08:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:00,677 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49881281] [2025-04-14 01:08:00,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:00,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:08:00,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:08:00,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:00,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:00,776 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 01:08:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:00,777 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49881281] [2025-04-14 01:08:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49881281] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:08:00,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:08:00,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 01:08:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637028263] [2025-04-14 01:08:00,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:00,778 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:08:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:00,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:08:00,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:08:00,778 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:00,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 38 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 01:08:00,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:00,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:00,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:00,958 INFO L116 PetriNetUnfolderBase]: 774/1138 cut-off events. [2025-04-14 01:08:00,958 INFO L117 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2025-04-14 01:08:00,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2906 conditions, 1138 events. 774/1138 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4337 event pairs, 296 based on Foata normal form. 2/921 useless extension candidates. Maximal degree in co-relation 2251. Up to 819 conditions per place. [2025-04-14 01:08:00,964 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 68 selfloop transitions, 2 changer transitions 4/74 dead transitions. [2025-04-14 01:08:00,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 74 transitions, 416 flow [2025-04-14 01:08:00,966 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:08:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:08:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2025-04-14 01:08:00,966 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2025-04-14 01:08:00,967 INFO L175 Difference]: Start difference. First operand has 32 places, 38 transitions, 132 flow. Second operand 5 states and 67 transitions. [2025-04-14 01:08:00,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 74 transitions, 416 flow [2025-04-14 01:08:00,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 74 transitions, 410 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-04-14 01:08:00,968 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 147 flow [2025-04-14 01:08:00,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2025-04-14 01:08:00,969 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2025-04-14 01:08:00,969 INFO L485 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 147 flow [2025-04-14 01:08:00,969 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 01:08:00,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:00,969 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:08:00,969 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 01:08:00,970 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 01:08:00,972 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:00,972 INFO L85 PathProgramCache]: Analyzing trace with hash 323770779, now seen corresponding path program 2 times [2025-04-14 01:08:00,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:00,972 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791660820] [2025-04-14 01:08:00,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:00,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:00,981 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:08:00,990 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:08:00,991 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:00,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:01,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:01,048 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791660820] [2025-04-14 01:08:01,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791660820] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:01,049 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779769864] [2025-04-14 01:08:01,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:01,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:01,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:01,051 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 01:08:01,053 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 01:08:01,106 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:08:01,126 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:08:01,127 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:01,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:01,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:08:01,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:01,183 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 01:08:01,183 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 01:08:01,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779769864] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:08:01,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-14 01:08:01,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-04-14 01:08:01,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155802065] [2025-04-14 01:08:01,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:01,183 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:08:01,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:01,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:08:01,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-04-14 01:08:01,184 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:01,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 01:08:01,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:01,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:01,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:01,443 INFO L116 PetriNetUnfolderBase]: 1272/1891 cut-off events. [2025-04-14 01:08:01,444 INFO L117 PetriNetUnfolderBase]: For 1423/1423 co-relation queries the response was YES. [2025-04-14 01:08:01,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5168 conditions, 1891 events. 1272/1891 cut-off events. For 1423/1423 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8059 event pairs, 655 based on Foata normal form. 70/1817 useless extension candidates. Maximal degree in co-relation 3747. Up to 1134 conditions per place. [2025-04-14 01:08:01,459 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 79 selfloop transitions, 7 changer transitions 2/88 dead transitions. [2025-04-14 01:08:01,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 88 transitions, 491 flow [2025-04-14 01:08:01,460 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:08:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:08:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2025-04-14 01:08:01,460 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.54 [2025-04-14 01:08:01,461 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 147 flow. Second operand 5 states and 81 transitions. [2025-04-14 01:08:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 88 transitions, 491 flow [2025-04-14 01:08:01,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 88 transitions, 482 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-14 01:08:01,467 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 210 flow [2025-04-14 01:08:01,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2025-04-14 01:08:01,468 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2025-04-14 01:08:01,468 INFO L485 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 210 flow [2025-04-14 01:08:01,470 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 01:08:01,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:01,470 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 01:08:01,478 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 01:08:01,674 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:01,674 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 01:08:01,675 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -269404949, now seen corresponding path program 1 times [2025-04-14 01:08:01,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:01,675 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430586516] [2025-04-14 01:08:01,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:01,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:01,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:08:01,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:08:01,695 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:01,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:01,765 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 01:08:01,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:01,766 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430586516] [2025-04-14 01:08:01,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430586516] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:01,766 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650511872] [2025-04-14 01:08:01,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:01,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:01,768 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 01:08:01,769 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 01:08:01,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:08:01,837 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:08:01,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:01,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:01,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:08:01,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:01,875 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 01:08:01,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:01,924 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 01:08:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650511872] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:08:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2025-04-14 01:08:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774780415] [2025-04-14 01:08:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:01,925 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:08:01,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:01,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:08:01,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-04-14 01:08:01,925 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:01,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 01:08:01,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:01,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:01,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:02,218 INFO L116 PetriNetUnfolderBase]: 1415/2097 cut-off events. [2025-04-14 01:08:02,219 INFO L117 PetriNetUnfolderBase]: For 2642/2642 co-relation queries the response was YES. [2025-04-14 01:08:02,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6210 conditions, 2097 events. 1415/2097 cut-off events. For 2642/2642 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9194 event pairs, 332 based on Foata normal form. 17/1928 useless extension candidates. Maximal degree in co-relation 4315. Up to 956 conditions per place. [2025-04-14 01:08:02,234 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 110 selfloop transitions, 8 changer transitions 1/119 dead transitions. [2025-04-14 01:08:02,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 119 transitions, 765 flow [2025-04-14 01:08:02,235 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 01:08:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 01:08:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2025-04-14 01:08:02,236 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-04-14 01:08:02,236 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 210 flow. Second operand 6 states and 99 transitions. [2025-04-14 01:08:02,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 119 transitions, 765 flow [2025-04-14 01:08:02,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 119 transitions, 761 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 01:08:02,242 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 250 flow [2025-04-14 01:08:02,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2025-04-14 01:08:02,242 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2025-04-14 01:08:02,243 INFO L485 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 250 flow [2025-04-14 01:08:02,243 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 01:08:02,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:02,243 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 01:08:02,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:02,443 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,SelfDestructingSolverStorable3 [2025-04-14 01:08:02,444 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 01:08:02,444 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash -357316659, now seen corresponding path program 2 times [2025-04-14 01:08:02,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:02,444 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448773374] [2025-04-14 01:08:02,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:02,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:02,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:08:02,462 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:08:02,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:02,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:02,506 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 01:08:02,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:02,506 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448773374] [2025-04-14 01:08:02,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448773374] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:02,506 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446337135] [2025-04-14 01:08:02,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:02,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:02,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:02,508 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 01:08:02,515 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 01:08:02,562 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:08:02,580 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:08:02,580 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:02,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:02,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:08:02,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:02,635 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 01:08:02,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:02,676 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 01:08:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446337135] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:02,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:08:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2025-04-14 01:08:02,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921293838] [2025-04-14 01:08:02,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:02,677 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:08:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:02,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:08:02,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-04-14 01:08:02,677 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:02,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 01:08:02,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:02,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:02,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:02,911 INFO L116 PetriNetUnfolderBase]: 1437/2133 cut-off events. [2025-04-14 01:08:02,911 INFO L117 PetriNetUnfolderBase]: For 3659/3659 co-relation queries the response was YES. [2025-04-14 01:08:02,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 2133 events. 1437/2133 cut-off events. For 3659/3659 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9304 event pairs, 316 based on Foata normal form. 20/1953 useless extension candidates. Maximal degree in co-relation 4753. Up to 916 conditions per place. [2025-04-14 01:08:02,922 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 110 selfloop transitions, 8 changer transitions 0/118 dead transitions. [2025-04-14 01:08:02,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 118 transitions, 799 flow [2025-04-14 01:08:02,923 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 01:08:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 01:08:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2025-04-14 01:08:02,923 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2025-04-14 01:08:02,923 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 250 flow. Second operand 6 states and 97 transitions. [2025-04-14 01:08:02,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 118 transitions, 799 flow [2025-04-14 01:08:02,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 118 transitions, 786 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-04-14 01:08:02,932 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 280 flow [2025-04-14 01:08:02,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2025-04-14 01:08:02,933 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2025-04-14 01:08:02,933 INFO L485 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 280 flow [2025-04-14 01:08:02,934 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 01:08:02,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:02,934 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 01:08:02,940 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 01:08:03,138 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:03,138 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 01:08:03,138 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash 697496506, now seen corresponding path program 1 times [2025-04-14 01:08:03,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:03,139 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742570902] [2025-04-14 01:08:03,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:03,146 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:08:03,152 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:08:03,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:03,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:03,209 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 01:08:03,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:03,209 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742570902] [2025-04-14 01:08:03,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742570902] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:08:03,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:08:03,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 01:08:03,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024534229] [2025-04-14 01:08:03,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:03,210 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:08:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:03,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:08:03,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:08:03,210 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:03,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 01:08:03,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:03,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:03,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:03,356 INFO L116 PetriNetUnfolderBase]: 921/1383 cut-off events. [2025-04-14 01:08:03,357 INFO L117 PetriNetUnfolderBase]: For 2879/2879 co-relation queries the response was YES. [2025-04-14 01:08:03,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 1383 events. 921/1383 cut-off events. For 2879/2879 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5449 event pairs, 454 based on Foata normal form. 48/1337 useless extension candidates. Maximal degree in co-relation 4157. Up to 885 conditions per place. [2025-04-14 01:08:03,363 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 69 selfloop transitions, 5 changer transitions 1/75 dead transitions. [2025-04-14 01:08:03,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 518 flow [2025-04-14 01:08:03,364 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:08:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:08:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2025-04-14 01:08:03,365 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-14 01:08:03,365 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 280 flow. Second operand 4 states and 60 transitions. [2025-04-14 01:08:03,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 518 flow [2025-04-14 01:08:03,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 506 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-04-14 01:08:03,369 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 268 flow [2025-04-14 01:08:03,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2025-04-14 01:08:03,371 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-04-14 01:08:03,371 INFO L485 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 268 flow [2025-04-14 01:08:03,371 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 01:08:03,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:03,371 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 01:08:03,371 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-14 01:08:03,372 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 01:08:03,373 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash 479740316, now seen corresponding path program 1 times [2025-04-14 01:08:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:03,373 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160585150] [2025-04-14 01:08:03,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:03,377 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:08:03,384 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:08:03,384 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:03,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:03,428 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 01:08:03,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:03,429 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160585150] [2025-04-14 01:08:03,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160585150] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:08:03,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:08:03,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 01:08:03,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073072548] [2025-04-14 01:08:03,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:03,429 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:08:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:03,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:08:03,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:08:03,430 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:03,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 01:08:03,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:03,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:03,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:03,550 INFO L116 PetriNetUnfolderBase]: 810/1210 cut-off events. [2025-04-14 01:08:03,550 INFO L117 PetriNetUnfolderBase]: For 2408/2408 co-relation queries the response was YES. [2025-04-14 01:08:03,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4251 conditions, 1210 events. 810/1210 cut-off events. For 2408/2408 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4595 event pairs, 369 based on Foata normal form. 15/1146 useless extension candidates. Maximal degree in co-relation 3811. Up to 941 conditions per place. [2025-04-14 01:08:03,559 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 58 selfloop transitions, 4 changer transitions 10/72 dead transitions. [2025-04-14 01:08:03,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 496 flow [2025-04-14 01:08:03,559 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:08:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:08:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2025-04-14 01:08:03,560 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-14 01:08:03,560 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 268 flow. Second operand 4 states and 60 transitions. [2025-04-14 01:08:03,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 496 flow [2025-04-14 01:08:03,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 72 transitions, 487 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-14 01:08:03,563 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 214 flow [2025-04-14 01:08:03,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2025-04-14 01:08:03,564 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-04-14 01:08:03,564 INFO L485 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 214 flow [2025-04-14 01:08:03,565 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 01:08:03,565 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:03,565 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 01:08:03,565 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-14 01:08:03,565 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 01:08:03,565 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:03,565 INFO L85 PathProgramCache]: Analyzing trace with hash -921517084, now seen corresponding path program 1 times [2025-04-14 01:08:03,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:03,565 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822717727] [2025-04-14 01:08:03,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:03,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 01:08:03,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:08:03,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:03,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:03,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:03,641 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822717727] [2025-04-14 01:08:03,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822717727] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:03,641 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968544791] [2025-04-14 01:08:03,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:03,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:03,645 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 01:08:03,646 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 01:08:03,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 01:08:03,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:08:03,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:03,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:03,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:08:03,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:03,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:03,760 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 01:08:03,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968544791] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:03,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:08:03,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-04-14 01:08:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487068195] [2025-04-14 01:08:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:08:03,761 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:08:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:03,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:08:03,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-04-14 01:08:03,761 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:03,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 214 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 01:08:03,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:03,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:03,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:03,893 INFO L116 PetriNetUnfolderBase]: 811/1175 cut-off events. [2025-04-14 01:08:03,893 INFO L117 PetriNetUnfolderBase]: For 2186/2186 co-relation queries the response was YES. [2025-04-14 01:08:03,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3987 conditions, 1175 events. 811/1175 cut-off events. For 2186/2186 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4219 event pairs, 364 based on Foata normal form. 72/1146 useless extension candidates. Maximal degree in co-relation 3963. Up to 931 conditions per place. [2025-04-14 01:08:03,899 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 54 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2025-04-14 01:08:03,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 410 flow [2025-04-14 01:08:03,899 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:08:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:08:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2025-04-14 01:08:03,900 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2025-04-14 01:08:03,900 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 214 flow. Second operand 5 states and 59 transitions. [2025-04-14 01:08:03,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 410 flow [2025-04-14 01:08:03,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 378 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-04-14 01:08:03,902 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 198 flow [2025-04-14 01:08:03,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2025-04-14 01:08:03,903 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2025-04-14 01:08:03,903 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 198 flow [2025-04-14 01:08:03,903 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 01:08:03,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:03,903 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 01:08:03,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:04,107 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 01:08:04,107 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 01:08:04,107 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1542545937, now seen corresponding path program 1 times [2025-04-14 01:08:04,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:04,107 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955601085] [2025-04-14 01:08:04,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:04,113 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:08:04,124 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:04,124 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:04,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:04,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:04,483 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955601085] [2025-04-14 01:08:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955601085] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:04,483 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423046373] [2025-04-14 01:08:04,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:04,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:04,485 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 01:08:04,486 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 01:08:04,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:08:04,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:04,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:04,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:04,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 01:08:04,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:04,620 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 01:08:04,631 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 01:08:04,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:04,669 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:04,669 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 19 treesize of output 16 [2025-04-14 01:08:04,694 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 01:08:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423046373] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:04,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:04,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 12 [2025-04-14 01:08:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005999772] [2025-04-14 01:08:04,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:04,695 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:08:04,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:04,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:08:04,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:08:04,696 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:04,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 198 flow. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 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 01:08:04,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:04,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:04,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:05,062 INFO L116 PetriNetUnfolderBase]: 1151/1658 cut-off events. [2025-04-14 01:08:05,062 INFO L117 PetriNetUnfolderBase]: For 2728/2728 co-relation queries the response was YES. [2025-04-14 01:08:05,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 1658 events. 1151/1658 cut-off events. For 2728/2728 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6664 event pairs, 33 based on Foata normal form. 2/1489 useless extension candidates. Maximal degree in co-relation 5588. Up to 1044 conditions per place. [2025-04-14 01:08:05,070 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 101 selfloop transitions, 28 changer transitions 1/130 dead transitions. [2025-04-14 01:08:05,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 130 transitions, 843 flow [2025-04-14 01:08:05,070 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 01:08:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 01:08:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2025-04-14 01:08:05,073 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2025-04-14 01:08:05,073 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 198 flow. Second operand 11 states and 147 transitions. [2025-04-14 01:08:05,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 130 transitions, 843 flow [2025-04-14 01:08:05,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 130 transitions, 795 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-04-14 01:08:05,078 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 331 flow [2025-04-14 01:08:05,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2025-04-14 01:08:05,079 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2025-04-14 01:08:05,079 INFO L485 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 331 flow [2025-04-14 01:08:05,079 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 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 01:08:05,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:05,079 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 01:08:05,085 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 01:08:05,279 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 01:08:05,280 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 01:08:05,280 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:05,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1996123317, now seen corresponding path program 2 times [2025-04-14 01:08:05,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:05,280 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529985966] [2025-04-14 01:08:05,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:05,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:05,288 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:05,309 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:05,309 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:05,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:05,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:05,619 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529985966] [2025-04-14 01:08:05,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529985966] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:05,619 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998454443] [2025-04-14 01:08:05,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:05,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:05,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:05,621 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 01:08:05,623 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 01:08:05,666 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:05,682 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:05,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:05,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:05,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-04-14 01:08:05,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:05,769 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 01:08:05,778 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 01:08:05,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:05,821 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 01:08:05,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998454443] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:05,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:05,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 11 [2025-04-14 01:08:05,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137966805] [2025-04-14 01:08:05,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:05,822 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 01:08:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:05,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 01:08:05,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:08:05,822 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:05,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 331 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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 01:08:05,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:05,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:05,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:06,277 INFO L116 PetriNetUnfolderBase]: 1724/2450 cut-off events. [2025-04-14 01:08:06,278 INFO L117 PetriNetUnfolderBase]: For 3039/3039 co-relation queries the response was YES. [2025-04-14 01:08:06,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8605 conditions, 2450 events. 1724/2450 cut-off events. For 3039/3039 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10219 event pairs, 211 based on Foata normal form. 2/2150 useless extension candidates. Maximal degree in co-relation 8574. Up to 1780 conditions per place. [2025-04-14 01:08:06,294 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 117 selfloop transitions, 37 changer transitions 1/155 dead transitions. [2025-04-14 01:08:06,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 155 transitions, 1073 flow [2025-04-14 01:08:06,296 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:08:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:08:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 159 transitions. [2025-04-14 01:08:06,297 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2025-04-14 01:08:06,297 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 331 flow. Second operand 12 states and 159 transitions. [2025-04-14 01:08:06,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 155 transitions, 1073 flow [2025-04-14 01:08:06,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 155 transitions, 1033 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-04-14 01:08:06,307 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 612 flow [2025-04-14 01:08:06,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=612, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2025-04-14 01:08:06,307 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2025-04-14 01:08:06,307 INFO L485 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 612 flow [2025-04-14 01:08:06,307 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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 01:08:06,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:06,308 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 01:08:06,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-14 01:08:06,508 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 01:08:06,508 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 01:08:06,509 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1840501745, now seen corresponding path program 1 times [2025-04-14 01:08:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:06,509 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637982685] [2025-04-14 01:08:06,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:06,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:08:06,522 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:06,522 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:06,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:06,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:06,816 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637982685] [2025-04-14 01:08:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637982685] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:06,816 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383162555] [2025-04-14 01:08:06,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:08:06,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:06,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:06,818 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 01:08:06,820 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 01:08:06,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:08:06,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:06,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:06,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:06,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:08:06,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:06,893 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 01:08:07,000 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 01:08:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:07,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:07,120 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 01:08:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383162555] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:07,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:07,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 19 [2025-04-14 01:08:07,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112660836] [2025-04-14 01:08:07,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:07,121 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:08:07,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:07,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:08:07,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:08:07,122 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:07,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 612 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 01:08:07,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:07,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:07,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:08,431 INFO L116 PetriNetUnfolderBase]: 3067/4320 cut-off events. [2025-04-14 01:08:08,431 INFO L117 PetriNetUnfolderBase]: For 9589/9589 co-relation queries the response was YES. [2025-04-14 01:08:08,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17555 conditions, 4320 events. 3067/4320 cut-off events. For 9589/9589 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19624 event pairs, 342 based on Foata normal form. 4/3741 useless extension candidates. Maximal degree in co-relation 16499. Up to 2865 conditions per place. [2025-04-14 01:08:08,450 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 210 selfloop transitions, 157 changer transitions 1/368 dead transitions. [2025-04-14 01:08:08,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 368 transitions, 3046 flow [2025-04-14 01:08:08,451 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 01:08:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 01:08:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 335 transitions. [2025-04-14 01:08:08,453 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2025-04-14 01:08:08,453 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 612 flow. Second operand 31 states and 335 transitions. [2025-04-14 01:08:08,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 368 transitions, 3046 flow [2025-04-14 01:08:08,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 368 transitions, 2965 flow, removed 38 selfloop flow, removed 2 redundant places. [2025-04-14 01:08:08,480 INFO L231 Difference]: Finished difference. Result has 116 places, 229 transitions, 2224 flow [2025-04-14 01:08:08,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2224, PETRI_PLACES=116, PETRI_TRANSITIONS=229} [2025-04-14 01:08:08,481 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2025-04-14 01:08:08,481 INFO L485 AbstractCegarLoop]: Abstraction has has 116 places, 229 transitions, 2224 flow [2025-04-14 01:08:08,481 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 01:08:08,481 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:08,481 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 01:08:08,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:08,682 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 01:08:08,682 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 01:08:08,682 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 974167785, now seen corresponding path program 2 times [2025-04-14 01:08:08,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:08,682 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492141640] [2025-04-14 01:08:08,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:08,687 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:08,696 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:08,696 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:08,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:08,943 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492141640] [2025-04-14 01:08:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492141640] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:08,943 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651419281] [2025-04-14 01:08:08,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:08,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:08,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:08,945 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 01:08:08,946 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 01:08:08,989 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:09,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:09,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:09,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:09,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:08:09,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:09,096 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 01:08:09,103 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 01:08:09,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:09,135 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:09,136 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 19 treesize of output 16 [2025-04-14 01:08:09,186 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 01:08:09,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651419281] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:09,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:09,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2025-04-14 01:08:09,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087078126] [2025-04-14 01:08:09,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:09,187 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:08:09,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:09,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:08:09,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:08:09,188 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:09,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 229 transitions, 2224 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 01:08:09,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:09,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:09,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:09,762 INFO L116 PetriNetUnfolderBase]: 3151/4455 cut-off events. [2025-04-14 01:08:09,762 INFO L117 PetriNetUnfolderBase]: For 19096/19096 co-relation queries the response was YES. [2025-04-14 01:08:09,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22782 conditions, 4455 events. 3151/4455 cut-off events. For 19096/19096 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20347 event pairs, 488 based on Foata normal form. 1/3853 useless extension candidates. Maximal degree in co-relation 21864. Up to 3815 conditions per place. [2025-04-14 01:08:09,787 INFO L140 encePairwiseOnDemand]: 17/30 looper letters, 175 selfloop transitions, 133 changer transitions 1/309 dead transitions. [2025-04-14 01:08:09,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 309 transitions, 3432 flow [2025-04-14 01:08:09,790 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:08:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:08:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2025-04-14 01:08:09,790 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2025-04-14 01:08:09,790 INFO L175 Difference]: Start difference. First operand has 116 places, 229 transitions, 2224 flow. Second operand 14 states and 141 transitions. [2025-04-14 01:08:09,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 309 transitions, 3432 flow [2025-04-14 01:08:09,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 309 transitions, 3060 flow, removed 125 selfloop flow, removed 5 redundant places. [2025-04-14 01:08:09,882 INFO L231 Difference]: Finished difference. Result has 130 places, 272 transitions, 2678 flow [2025-04-14 01:08:09,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2678, PETRI_PLACES=130, PETRI_TRANSITIONS=272} [2025-04-14 01:08:09,882 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2025-04-14 01:08:09,882 INFO L485 AbstractCegarLoop]: Abstraction has has 130 places, 272 transitions, 2678 flow [2025-04-14 01:08:09,882 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 01:08:09,882 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:09,882 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 01:08:09,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:10,085 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 01:08:10,086 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 01:08:10,086 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash -267608967, now seen corresponding path program 3 times [2025-04-14 01:08:10,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:10,086 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888876938] [2025-04-14 01:08:10,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:08:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:10,095 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:10,106 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:10,106 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:08:10,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:10,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:10,354 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888876938] [2025-04-14 01:08:10,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888876938] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:10,355 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321214524] [2025-04-14 01:08:10,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:08:10,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:10,356 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 01:08:10,358 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 01:08:10,399 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:10,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:10,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:08:10,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:10,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:08:10,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:10,493 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 01:08:10,499 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 01:08:10,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:10,536 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:10,536 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 23 treesize of output 16 [2025-04-14 01:08:10,592 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 01:08:10,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321214524] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:10,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:10,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 12 [2025-04-14 01:08:10,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631585298] [2025-04-14 01:08:10,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:10,593 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:08:10,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:10,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:08:10,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:08:10,593 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:10,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 272 transitions, 2678 flow. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 01:08:10,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:10,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:10,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:11,375 INFO L116 PetriNetUnfolderBase]: 3296/4681 cut-off events. [2025-04-14 01:08:11,375 INFO L117 PetriNetUnfolderBase]: For 19806/19806 co-relation queries the response was YES. [2025-04-14 01:08:11,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24410 conditions, 4681 events. 3296/4681 cut-off events. For 19806/19806 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22013 event pairs, 219 based on Foata normal form. 1/4063 useless extension candidates. Maximal degree in co-relation 22915. Up to 3677 conditions per place. [2025-04-14 01:08:11,402 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 234 selfloop transitions, 151 changer transitions 1/386 dead transitions. [2025-04-14 01:08:11,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 386 transitions, 4195 flow [2025-04-14 01:08:11,406 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 01:08:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 01:08:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 205 transitions. [2025-04-14 01:08:11,407 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4019607843137255 [2025-04-14 01:08:11,407 INFO L175 Difference]: Start difference. First operand has 130 places, 272 transitions, 2678 flow. Second operand 17 states and 205 transitions. [2025-04-14 01:08:11,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 386 transitions, 4195 flow [2025-04-14 01:08:11,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 386 transitions, 4066 flow, removed 43 selfloop flow, removed 3 redundant places. [2025-04-14 01:08:11,470 INFO L231 Difference]: Finished difference. Result has 148 places, 298 transitions, 3236 flow [2025-04-14 01:08:11,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3236, PETRI_PLACES=148, PETRI_TRANSITIONS=298} [2025-04-14 01:08:11,471 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2025-04-14 01:08:11,471 INFO L485 AbstractCegarLoop]: Abstraction has has 148 places, 298 transitions, 3236 flow [2025-04-14 01:08:11,471 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 01:08:11,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:11,471 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:08:11,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-14 01:08:11,674 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 01:08:11,674 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 01:08:11,674 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1046217865, now seen corresponding path program 4 times [2025-04-14 01:08:11,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:11,674 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066637529] [2025-04-14 01:08:11,674 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:08:11,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:11,679 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:11,684 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:11,684 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:08:11,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:11,878 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 01:08:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:11,878 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066637529] [2025-04-14 01:08:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066637529] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:11,879 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137093042] [2025-04-14 01:08:11,879 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:08:11,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:11,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:11,880 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 01:08:11,882 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 01:08:11,923 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:11,940 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:11,940 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:08:11,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:11,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:08:11,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:11,962 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 01:08:12,043 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:12,043 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 19 treesize of output 15 [2025-04-14 01:08:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:12,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:12,201 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 01:08:12,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137093042] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:12,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:12,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 19 [2025-04-14 01:08:12,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610629764] [2025-04-14 01:08:12,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:12,201 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:08:12,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:12,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:08:12,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:08:12,202 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:12,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 298 transitions, 3236 flow. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 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 01:08:12,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:12,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:12,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:15,751 INFO L116 PetriNetUnfolderBase]: 9991/13873 cut-off events. [2025-04-14 01:08:15,751 INFO L117 PetriNetUnfolderBase]: For 73279/73279 co-relation queries the response was YES. [2025-04-14 01:08:15,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75186 conditions, 13873 events. 9991/13873 cut-off events. For 73279/73279 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 74239 event pairs, 490 based on Foata normal form. 4/11477 useless extension candidates. Maximal degree in co-relation 74847. Up to 5226 conditions per place. [2025-04-14 01:08:15,864 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 595 selfloop transitions, 750 changer transitions 4/1349 dead transitions. [2025-04-14 01:08:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 1349 transitions, 15594 flow [2025-04-14 01:08:15,865 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-04-14 01:08:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2025-04-14 01:08:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 734 transitions. [2025-04-14 01:08:15,867 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4077777777777778 [2025-04-14 01:08:15,867 INFO L175 Difference]: Start difference. First operand has 148 places, 298 transitions, 3236 flow. Second operand 60 states and 734 transitions. [2025-04-14 01:08:15,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 1349 transitions, 15594 flow [2025-04-14 01:08:16,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 1349 transitions, 14808 flow, removed 282 selfloop flow, removed 5 redundant places. [2025-04-14 01:08:16,286 INFO L231 Difference]: Finished difference. Result has 239 places, 924 transitions, 12250 flow [2025-04-14 01:08:16,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=12250, PETRI_PLACES=239, PETRI_TRANSITIONS=924} [2025-04-14 01:08:16,287 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2025-04-14 01:08:16,287 INFO L485 AbstractCegarLoop]: Abstraction has has 239 places, 924 transitions, 12250 flow [2025-04-14 01:08:16,287 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 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 01:08:16,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:16,287 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 01:08:16,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:16,487 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 01:08:16,488 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 01:08:16,488 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash -240321259, now seen corresponding path program 5 times [2025-04-14 01:08:16,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:16,488 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890853527] [2025-04-14 01:08:16,489 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:08:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:16,496 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:16,504 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:16,504 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:16,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:16,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:16,792 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890853527] [2025-04-14 01:08:16,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890853527] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:16,792 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059313254] [2025-04-14 01:08:16,792 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:08:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:16,794 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 01:08:16,796 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 01:08:16,840 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:16,859 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:16,859 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:16,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:16,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:08:16,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:16,884 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 01:08:16,992 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:16,992 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 19 treesize of output 15 [2025-04-14 01:08:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:17,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:17,112 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 01:08:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059313254] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:17,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:17,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2025-04-14 01:08:17,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088724605] [2025-04-14 01:08:17,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:17,113 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 01:08:17,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:17,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 01:08:17,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2025-04-14 01:08:17,114 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:17,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 924 transitions, 12250 flow. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 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 01:08:17,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:17,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:17,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:20,769 INFO L116 PetriNetUnfolderBase]: 13236/18391 cut-off events. [2025-04-14 01:08:20,770 INFO L117 PetriNetUnfolderBase]: For 385720/385720 co-relation queries the response was YES. [2025-04-14 01:08:20,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133502 conditions, 18391 events. 13236/18391 cut-off events. For 385720/385720 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 102671 event pairs, 495 based on Foata normal form. 1/15225 useless extension candidates. Maximal degree in co-relation 133084. Up to 8994 conditions per place. [2025-04-14 01:08:20,982 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 488 selfloop transitions, 1063 changer transitions 1/1552 dead transitions. [2025-04-14 01:08:20,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1552 transitions, 23450 flow [2025-04-14 01:08:20,982 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 01:08:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 01:08:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 343 transitions. [2025-04-14 01:08:20,983 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2025-04-14 01:08:20,983 INFO L175 Difference]: Start difference. First operand has 239 places, 924 transitions, 12250 flow. Second operand 28 states and 343 transitions. [2025-04-14 01:08:20,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1552 transitions, 23450 flow [2025-04-14 01:08:25,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1552 transitions, 20742 flow, removed 1333 selfloop flow, removed 3 redundant places. [2025-04-14 01:08:25,570 INFO L231 Difference]: Finished difference. Result has 275 places, 1372 transitions, 20187 flow [2025-04-14 01:08:25,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10806, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=701, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=20187, PETRI_PLACES=275, PETRI_TRANSITIONS=1372} [2025-04-14 01:08:25,571 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2025-04-14 01:08:25,571 INFO L485 AbstractCegarLoop]: Abstraction has has 275 places, 1372 transitions, 20187 flow [2025-04-14 01:08:25,571 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 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 01:08:25,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:25,571 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 01:08:25,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:25,773 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 01:08:25,773 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 01:08:25,773 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1900336203, now seen corresponding path program 6 times [2025-04-14 01:08:25,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:25,774 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051693345] [2025-04-14 01:08:25,774 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:08:25,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:25,779 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:25,790 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:25,791 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:08:25,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:26,000 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051693345] [2025-04-14 01:08:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051693345] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:26,000 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093045606] [2025-04-14 01:08:26,000 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:08:26,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:26,002 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 01:08:26,003 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 01:08:26,047 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:26,064 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:26,065 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:08:26,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:26,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:08:26,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:26,130 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:26,130 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 01:08:26,142 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 01:08:26,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:26,167 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:26,167 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 23 treesize of output 16 [2025-04-14 01:08:26,209 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 01:08:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093045606] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:26,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:26,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 12 [2025-04-14 01:08:26,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578292626] [2025-04-14 01:08:26,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:26,209 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:08:26,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:26,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:08:26,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:08:26,210 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:26,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 1372 transitions, 20187 flow. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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 01:08:26,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:26,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:30,238 INFO L116 PetriNetUnfolderBase]: 13260/18434 cut-off events. [2025-04-14 01:08:30,238 INFO L117 PetriNetUnfolderBase]: For 411430/411430 co-relation queries the response was YES. [2025-04-14 01:08:30,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138671 conditions, 18434 events. 13260/18434 cut-off events. For 411430/411430 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 103065 event pairs, 528 based on Foata normal form. 1/15262 useless extension candidates. Maximal degree in co-relation 138201. Up to 9006 conditions per place. [2025-04-14 01:08:30,688 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 491 selfloop transitions, 1069 changer transitions 1/1561 dead transitions. [2025-04-14 01:08:30,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1561 transitions, 24800 flow [2025-04-14 01:08:30,689 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 01:08:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 01:08:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 352 transitions. [2025-04-14 01:08:30,690 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4045977011494253 [2025-04-14 01:08:30,690 INFO L175 Difference]: Start difference. First operand has 275 places, 1372 transitions, 20187 flow. Second operand 29 states and 352 transitions. [2025-04-14 01:08:30,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1561 transitions, 24800 flow [2025-04-14 01:08:37,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1561 transitions, 23188 flow, removed 668 selfloop flow, removed 8 redundant places. [2025-04-14 01:08:37,550 INFO L231 Difference]: Finished difference. Result has 296 places, 1378 transitions, 20882 flow [2025-04-14 01:08:37,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18647, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20882, PETRI_PLACES=296, PETRI_TRANSITIONS=1378} [2025-04-14 01:08:37,552 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2025-04-14 01:08:37,552 INFO L485 AbstractCegarLoop]: Abstraction has has 296 places, 1378 transitions, 20882 flow [2025-04-14 01:08:37,552 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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 01:08:37,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:37,552 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 01:08:37,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:37,756 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 01:08:37,756 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 01:08:37,756 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1760617377, now seen corresponding path program 7 times [2025-04-14 01:08:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:37,756 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85255642] [2025-04-14 01:08:37,756 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:08:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:37,760 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:08:37,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:37,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:37,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:37,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:37,980 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85255642] [2025-04-14 01:08:37,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85255642] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:37,980 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506873185] [2025-04-14 01:08:37,980 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:08:37,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:37,982 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 01:08:37,983 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 01:08:38,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:08:38,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:38,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:08:38,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:38,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:08:38,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:38,062 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 01:08:38,147 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 01:08:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:38,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:38,214 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 01:08:38,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506873185] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:38,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:38,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2025-04-14 01:08:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541708014] [2025-04-14 01:08:38,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:38,215 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 01:08:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:38,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 01:08:38,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2025-04-14 01:08:38,216 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:38,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1378 transitions, 20882 flow. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 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 01:08:38,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:38,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:38,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:42,195 INFO L116 PetriNetUnfolderBase]: 13331/18560 cut-off events. [2025-04-14 01:08:42,196 INFO L117 PetriNetUnfolderBase]: For 240805/240805 co-relation queries the response was YES. [2025-04-14 01:08:42,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134448 conditions, 18560 events. 13331/18560 cut-off events. For 240805/240805 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 104242 event pairs, 1818 based on Foata normal form. 1/15382 useless extension candidates. Maximal degree in co-relation 134088. Up to 17534 conditions per place. [2025-04-14 01:08:42,570 INFO L140 encePairwiseOnDemand]: 17/30 looper letters, 1163 selfloop transitions, 280 changer transitions 1/1444 dead transitions. [2025-04-14 01:08:42,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1444 transitions, 24450 flow [2025-04-14 01:08:42,571 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:08:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:08:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2025-04-14 01:08:42,572 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2025-04-14 01:08:42,572 INFO L175 Difference]: Start difference. First operand has 296 places, 1378 transitions, 20882 flow. Second operand 12 states and 132 transitions. [2025-04-14 01:08:42,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1444 transitions, 24450 flow [2025-04-14 01:08:45,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1444 transitions, 22555 flow, removed 23 selfloop flow, removed 23 redundant places. [2025-04-14 01:08:45,560 INFO L231 Difference]: Finished difference. Result has 289 places, 1399 transitions, 20006 flow [2025-04-14 01:08:45,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=19029, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20006, PETRI_PLACES=289, PETRI_TRANSITIONS=1399} [2025-04-14 01:08:45,561 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2025-04-14 01:08:45,561 INFO L485 AbstractCegarLoop]: Abstraction has has 289 places, 1399 transitions, 20006 flow [2025-04-14 01:08:45,561 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 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 01:08:45,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:45,561 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 01:08:45,567 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 01:08:45,762 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 01:08:45,762 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 01:08:45,763 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash 305997653, now seen corresponding path program 8 times [2025-04-14 01:08:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:45,763 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418170695] [2025-04-14 01:08:45,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:45,768 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:45,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:45,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:45,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:46,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:46,020 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418170695] [2025-04-14 01:08:46,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418170695] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:46,020 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066857578] [2025-04-14 01:08:46,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:08:46,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:46,023 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 01:08:46,024 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 01:08:46,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:46,083 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:46,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:08:46,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:46,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:08:46,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:46,158 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 01:08:46,164 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 01:08:46,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:46,184 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:46,184 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 23 treesize of output 16 [2025-04-14 01:08:46,243 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 01:08:46,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066857578] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:46,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:46,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 12 [2025-04-14 01:08:46,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681532760] [2025-04-14 01:08:46,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:46,244 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:08:46,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:46,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:08:46,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:08:46,244 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:46,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1399 transitions, 20006 flow. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 01:08:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:46,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:46,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:49,890 INFO L116 PetriNetUnfolderBase]: 13331/18559 cut-off events. [2025-04-14 01:08:49,890 INFO L117 PetriNetUnfolderBase]: For 231633/231633 co-relation queries the response was YES. [2025-04-14 01:08:50,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130044 conditions, 18559 events. 13331/18559 cut-off events. For 231633/231633 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 104197 event pairs, 1745 based on Foata normal form. 1/15401 useless extension candidates. Maximal degree in co-relation 129698. Up to 17539 conditions per place. [2025-04-14 01:08:50,323 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 1161 selfloop transitions, 309 changer transitions 1/1471 dead transitions. [2025-04-14 01:08:50,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1471 transitions, 23595 flow [2025-04-14 01:08:50,324 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:08:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:08:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2025-04-14 01:08:50,325 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2025-04-14 01:08:50,325 INFO L175 Difference]: Start difference. First operand has 289 places, 1399 transitions, 20006 flow. Second operand 14 states and 159 transitions. [2025-04-14 01:08:50,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1471 transitions, 23595 flow [2025-04-14 01:08:52,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1471 transitions, 23323 flow, removed 22 selfloop flow, removed 4 redundant places. [2025-04-14 01:08:52,976 INFO L231 Difference]: Finished difference. Result has 303 places, 1414 transitions, 20779 flow [2025-04-14 01:08:52,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=19735, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=20779, PETRI_PLACES=303, PETRI_TRANSITIONS=1414} [2025-04-14 01:08:52,977 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2025-04-14 01:08:52,977 INFO L485 AbstractCegarLoop]: Abstraction has has 303 places, 1414 transitions, 20779 flow [2025-04-14 01:08:52,977 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 01:08:52,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:08:52,977 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 01:08:52,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-04-14 01:08:53,177 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 01:08:53,177 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 01:08:53,178 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:08:53,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1211484809, now seen corresponding path program 3 times [2025-04-14 01:08:53,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:08:53,178 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795434784] [2025-04-14 01:08:53,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:08:53,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:08:53,182 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:53,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:53,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:08:53,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:08:53,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:08:53,361 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795434784] [2025-04-14 01:08:53,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795434784] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:08:53,361 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708202473] [2025-04-14 01:08:53,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:08:53,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:08:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:08:53,363 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 01:08:53,368 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 01:08:53,409 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:08:53,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:08:53,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:08:53,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:08:53,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-04-14 01:08:53,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:08:53,504 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 01:08:53,509 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 01:08:53,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:08:53,543 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:08:53,543 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 19 treesize of output 16 [2025-04-14 01:08:53,567 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 01:08:53,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708202473] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:08:53,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:08:53,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 12 [2025-04-14 01:08:53,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075135835] [2025-04-14 01:08:53,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:08:53,567 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:08:53,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:08:53,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:08:53,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:08:53,568 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:08:53,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 1414 transitions, 20779 flow. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 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 01:08:53,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:08:53,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:08:53,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:08:57,964 INFO L116 PetriNetUnfolderBase]: 14327/19948 cut-off events. [2025-04-14 01:08:57,964 INFO L117 PetriNetUnfolderBase]: For 268710/268710 co-relation queries the response was YES. [2025-04-14 01:08:58,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141999 conditions, 19948 events. 14327/19948 cut-off events. For 268710/268710 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 113180 event pairs, 2012 based on Foata normal form. 3/16535 useless extension candidates. Maximal degree in co-relation 141646. Up to 18251 conditions per place. [2025-04-14 01:08:58,244 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1375 selfloop transitions, 239 changer transitions 1/1615 dead transitions. [2025-04-14 01:08:58,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1615 transitions, 26237 flow [2025-04-14 01:08:58,244 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 01:08:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 01:08:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2025-04-14 01:08:58,245 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2025-04-14 01:08:58,245 INFO L175 Difference]: Start difference. First operand has 303 places, 1414 transitions, 20779 flow. Second operand 11 states and 138 transitions. [2025-04-14 01:08:58,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1615 transitions, 26237 flow [2025-04-14 01:09:01,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1615 transitions, 25938 flow, removed 42 selfloop flow, removed 6 redundant places. [2025-04-14 01:09:01,407 INFO L231 Difference]: Finished difference. Result has 311 places, 1480 transitions, 22274 flow [2025-04-14 01:09:01,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20480, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22274, PETRI_PLACES=311, PETRI_TRANSITIONS=1480} [2025-04-14 01:09:01,408 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2025-04-14 01:09:01,408 INFO L485 AbstractCegarLoop]: Abstraction has has 311 places, 1480 transitions, 22274 flow [2025-04-14 01:09:01,409 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 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 01:09:01,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:09:01,409 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 01:09:01,417 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 01:09:01,609 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 01:09:01,609 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 01:09:01,610 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:09:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash 225975049, now seen corresponding path program 4 times [2025-04-14 01:09:01,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:09:01,610 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688375213] [2025-04-14 01:09:01,610 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:09:01,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:09:01,617 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:01,621 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:01,621 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:09:01,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:01,737 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 01:09:01,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:09:01,737 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688375213] [2025-04-14 01:09:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688375213] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:09:01,737 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798568561] [2025-04-14 01:09:01,737 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:09:01,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:09:01,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:09:01,739 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 01:09:01,741 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 01:09:01,784 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:01,801 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:01,802 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:09:01,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:01,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 01:09:01,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:09:01,861 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 01:09:01,868 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 01:09:01,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:09:01,890 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:09:01,890 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 19 treesize of output 16 [2025-04-14 01:09:01,909 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 01:09:01,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798568561] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:09:01,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:09:01,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2025-04-14 01:09:01,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045250022] [2025-04-14 01:09:01,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:09:01,910 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 01:09:01,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:09:01,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 01:09:01,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:09:01,910 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:09:01,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 1480 transitions, 22274 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 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 01:09:01,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:09:01,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:09:01,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:09:06,743 INFO L116 PetriNetUnfolderBase]: 16070/22307 cut-off events. [2025-04-14 01:09:06,743 INFO L117 PetriNetUnfolderBase]: For 330541/330541 co-relation queries the response was YES. [2025-04-14 01:09:07,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162334 conditions, 22307 events. 16070/22307 cut-off events. For 330541/330541 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 128008 event pairs, 1973 based on Foata normal form. 3/18360 useless extension candidates. Maximal degree in co-relation 161976. Up to 19450 conditions per place. [2025-04-14 01:09:07,169 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1526 selfloop transitions, 296 changer transitions 1/1823 dead transitions. [2025-04-14 01:09:07,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1823 transitions, 30272 flow [2025-04-14 01:09:07,170 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:09:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:09:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2025-04-14 01:09:07,170 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2025-04-14 01:09:07,170 INFO L175 Difference]: Start difference. First operand has 311 places, 1480 transitions, 22274 flow. Second operand 10 states and 142 transitions. [2025-04-14 01:09:07,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1823 transitions, 30272 flow [2025-04-14 01:09:11,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1823 transitions, 29560 flow, removed 256 selfloop flow, removed 5 redundant places. [2025-04-14 01:09:11,937 INFO L231 Difference]: Finished difference. Result has 318 places, 1568 transitions, 24250 flow [2025-04-14 01:09:11,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21660, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24250, PETRI_PLACES=318, PETRI_TRANSITIONS=1568} [2025-04-14 01:09:11,938 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2025-04-14 01:09:11,938 INFO L485 AbstractCegarLoop]: Abstraction has has 318 places, 1568 transitions, 24250 flow [2025-04-14 01:09:11,938 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 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 01:09:11,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:09:11,939 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 01:09:11,945 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 01:09:12,139 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 01:09:12,139 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 01:09:12,140 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:09:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 459156865, now seen corresponding path program 9 times [2025-04-14 01:09:12,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:09:12,140 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407202829] [2025-04-14 01:09:12,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:09:12,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:09:12,145 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:12,154 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:12,154 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:09:12,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:09:12,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:09:12,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407202829] [2025-04-14 01:09:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407202829] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:09:12,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048048660] [2025-04-14 01:09:12,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:09:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:09:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:09:12,438 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 01:09:12,440 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 01:09:12,483 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:12,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:12,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:09:12,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:12,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:09:12,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:09:12,588 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 01:09:12,592 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 01:09:12,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:09:12,620 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:09:12,620 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 23 treesize of output 16 [2025-04-14 01:09:12,685 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 01:09:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048048660] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:09:12,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:09:12,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2025-04-14 01:09:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750938056] [2025-04-14 01:09:12,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:09:12,686 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:09:12,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:09:12,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:09:12,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:09:12,686 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:09:12,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1568 transitions, 24250 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 01:09:12,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:09:12,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:09:12,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:09:18,337 INFO L116 PetriNetUnfolderBase]: 16103/22365 cut-off events. [2025-04-14 01:09:18,337 INFO L117 PetriNetUnfolderBase]: For 323436/323436 co-relation queries the response was YES. [2025-04-14 01:09:18,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165841 conditions, 22365 events. 16103/22365 cut-off events. For 323436/323436 co-relation queries the response was YES. Maximal size of possible extension queue 1251. Compared 128478 event pairs, 2117 based on Foata normal form. 1/18408 useless extension candidates. Maximal degree in co-relation 165479. Up to 21389 conditions per place. [2025-04-14 01:09:18,661 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 1315 selfloop transitions, 308 changer transitions 1/1624 dead transitions. [2025-04-14 01:09:18,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1624 transitions, 27929 flow [2025-04-14 01:09:18,662 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:09:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:09:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 149 transitions. [2025-04-14 01:09:18,662 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3547619047619048 [2025-04-14 01:09:18,662 INFO L175 Difference]: Start difference. First operand has 318 places, 1568 transitions, 24250 flow. Second operand 14 states and 149 transitions. [2025-04-14 01:09:18,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1624 transitions, 27929 flow [2025-04-14 01:09:23,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1624 transitions, 27118 flow, removed 294 selfloop flow, removed 5 redundant places. [2025-04-14 01:09:23,505 INFO L231 Difference]: Finished difference. Result has 329 places, 1577 transitions, 24245 flow [2025-04-14 01:09:23,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=23439, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24245, PETRI_PLACES=329, PETRI_TRANSITIONS=1577} [2025-04-14 01:09:23,506 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2025-04-14 01:09:23,507 INFO L485 AbstractCegarLoop]: Abstraction has has 329 places, 1577 transitions, 24245 flow [2025-04-14 01:09:23,507 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 01:09:23,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:09:23,507 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 01:09:23,512 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 01:09:23,707 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 01:09:23,707 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 01:09:23,708 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:09:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 942923199, now seen corresponding path program 10 times [2025-04-14 01:09:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:09:23,708 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88286906] [2025-04-14 01:09:23,708 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:09:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:09:23,712 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:23,717 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:23,718 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:09:23,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:23,913 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 01:09:23,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:09:23,914 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88286906] [2025-04-14 01:09:23,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88286906] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:09:23,914 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127595773] [2025-04-14 01:09:23,914 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:09:23,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:09:23,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:09:23,916 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 01:09:23,917 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 01:09:23,959 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:23,974 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:23,974 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:09:23,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:23,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:09:23,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:09:23,992 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 01:09:24,096 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 01:09:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:09:24,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:09:24,204 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 01:09:24,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127595773] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:09:24,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:09:24,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 20 [2025-04-14 01:09:24,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769036996] [2025-04-14 01:09:24,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:09:24,205 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 01:09:24,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:09:24,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 01:09:24,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-04-14 01:09:24,206 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:09:24,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1577 transitions, 24245 flow. Second operand has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 states have internal predecessors, (117), 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 01:09:24,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:09:24,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:09:24,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:09:31,444 INFO L116 PetriNetUnfolderBase]: 18251/25350 cut-off events. [2025-04-14 01:09:31,444 INFO L117 PetriNetUnfolderBase]: For 364891/364891 co-relation queries the response was YES. [2025-04-14 01:09:31,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186798 conditions, 25350 events. 18251/25350 cut-off events. For 364891/364891 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 148603 event pairs, 2032 based on Foata normal form. 4/20874 useless extension candidates. Maximal degree in co-relation 186432. Up to 19851 conditions per place. [2025-04-14 01:09:32,072 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1219 selfloop transitions, 900 changer transitions 2/2121 dead transitions. [2025-04-14 01:09:32,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 2121 transitions, 35757 flow [2025-04-14 01:09:32,073 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-14 01:09:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-04-14 01:09:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 437 transitions. [2025-04-14 01:09:32,074 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3387596899224806 [2025-04-14 01:09:32,074 INFO L175 Difference]: Start difference. First operand has 329 places, 1577 transitions, 24245 flow. Second operand 43 states and 437 transitions. [2025-04-14 01:09:32,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 2121 transitions, 35757 flow [2025-04-14 01:09:37,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 2121 transitions, 35256 flow, removed 55 selfloop flow, removed 8 redundant places. [2025-04-14 01:09:37,566 INFO L231 Difference]: Finished difference. Result has 379 places, 1898 transitions, 32173 flow [2025-04-14 01:09:37,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=23816, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=32173, PETRI_PLACES=379, PETRI_TRANSITIONS=1898} [2025-04-14 01:09:37,568 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 349 predicate places. [2025-04-14 01:09:37,568 INFO L485 AbstractCegarLoop]: Abstraction has has 379 places, 1898 transitions, 32173 flow [2025-04-14 01:09:37,568 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 states have internal predecessors, (117), 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 01:09:37,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:09:37,568 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 01:09:37,574 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 01:09:37,772 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 01:09:37,772 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 01:09:37,772 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:09:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash -171732509, now seen corresponding path program 5 times [2025-04-14 01:09:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:09:37,773 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720765430] [2025-04-14 01:09:37,773 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:09:37,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:09:37,779 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:37,786 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:37,786 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:09:37,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:09:38,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:09:38,052 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720765430] [2025-04-14 01:09:38,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720765430] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:09:38,052 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426823518] [2025-04-14 01:09:38,052 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:09:38,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:09:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:09:38,054 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 01:09:38,056 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 01:09:38,110 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:38,127 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:38,127 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:09:38,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:38,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 01:09:38,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:09:38,215 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 01:09:38,222 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 01:09:38,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:09:38,278 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 01:09:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426823518] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:09:38,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:09:38,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2025-04-14 01:09:38,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900958197] [2025-04-14 01:09:38,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:09:38,279 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:09:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:09:38,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:09:38,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:09:38,280 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:09:38,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1898 transitions, 32173 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 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 01:09:38,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:09:38,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:09:38,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:09:45,983 INFO L116 PetriNetUnfolderBase]: 19419/26985 cut-off events. [2025-04-14 01:09:45,984 INFO L117 PetriNetUnfolderBase]: For 480068/480068 co-relation queries the response was YES. [2025-04-14 01:09:46,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213529 conditions, 26985 events. 19419/26985 cut-off events. For 480068/480068 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 159886 event pairs, 2447 based on Foata normal form. 3/22401 useless extension candidates. Maximal degree in co-relation 213138. Up to 24207 conditions per place. [2025-04-14 01:09:46,515 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1875 selfloop transitions, 384 changer transitions 1/2260 dead transitions. [2025-04-14 01:09:46,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2260 transitions, 41930 flow [2025-04-14 01:09:46,516 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:09:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:09:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2025-04-14 01:09:46,517 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2025-04-14 01:09:46,517 INFO L175 Difference]: Start difference. First operand has 379 places, 1898 transitions, 32173 flow. Second operand 12 states and 155 transitions. [2025-04-14 01:09:46,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2260 transitions, 41930 flow [2025-04-14 01:09:55,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 2260 transitions, 40246 flow, removed 790 selfloop flow, removed 8 redundant places. [2025-04-14 01:09:55,234 INFO L231 Difference]: Finished difference. Result has 386 places, 1998 transitions, 33998 flow [2025-04-14 01:09:55,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=30869, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=33998, PETRI_PLACES=386, PETRI_TRANSITIONS=1998} [2025-04-14 01:09:55,235 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2025-04-14 01:09:55,235 INFO L485 AbstractCegarLoop]: Abstraction has has 386 places, 1998 transitions, 33998 flow [2025-04-14 01:09:55,235 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 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 01:09:55,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:09:55,235 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 01:09:55,241 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 01:09:55,436 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 01:09:55,436 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 01:09:55,436 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:09:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -627255713, now seen corresponding path program 6 times [2025-04-14 01:09:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:09:55,436 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431551990] [2025-04-14 01:09:55,436 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:09:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:09:55,440 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:55,444 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:55,444 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:09:55,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:09:55,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:09:55,605 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431551990] [2025-04-14 01:09:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431551990] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:09:55,605 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423962377] [2025-04-14 01:09:55,605 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:09:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:09:55,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:09:55,607 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 01:09:55,609 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 01:09:55,652 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:09:55,666 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:09:55,666 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:09:55,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:09:55,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-04-14 01:09:55,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:09:55,735 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 01:09:55,739 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 01:09:55,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:09:55,777 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 01:09:55,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423962377] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:09:55,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:09:55,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 14 [2025-04-14 01:09:55,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718117461] [2025-04-14 01:09:55,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:09:55,777 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:09:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:09:55,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:09:55,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:09:55,778 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:09:55,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1998 transitions, 33998 flow. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 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 01:09:55,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:09:55,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:09:55,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:10:03,905 INFO L116 PetriNetUnfolderBase]: 20122/28002 cut-off events. [2025-04-14 01:10:03,905 INFO L117 PetriNetUnfolderBase]: For 502768/502768 co-relation queries the response was YES. [2025-04-14 01:10:04,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222226 conditions, 28002 events. 20122/28002 cut-off events. For 502768/502768 co-relation queries the response was YES. Maximal size of possible extension queue 1596. Compared 167529 event pairs, 2512 based on Foata normal form. 3/23296 useless extension candidates. Maximal degree in co-relation 221832. Up to 25021 conditions per place. [2025-04-14 01:10:04,543 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1807 selfloop transitions, 462 changer transitions 1/2270 dead transitions. [2025-04-14 01:10:04,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 2270 transitions, 42124 flow [2025-04-14 01:10:04,544 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:10:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:10:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2025-04-14 01:10:04,544 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2025-04-14 01:10:04,545 INFO L175 Difference]: Start difference. First operand has 386 places, 1998 transitions, 33998 flow. Second operand 12 states and 154 transitions. [2025-04-14 01:10:04,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 2270 transitions, 42124 flow [2025-04-14 01:10:13,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 2270 transitions, 40901 flow, removed 416 selfloop flow, removed 7 redundant places. [2025-04-14 01:10:13,315 INFO L231 Difference]: Finished difference. Result has 396 places, 2074 transitions, 35891 flow [2025-04-14 01:10:13,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=32799, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=35891, PETRI_PLACES=396, PETRI_TRANSITIONS=2074} [2025-04-14 01:10:13,317 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2025-04-14 01:10:13,317 INFO L485 AbstractCegarLoop]: Abstraction has has 396 places, 2074 transitions, 35891 flow [2025-04-14 01:10:13,317 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 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 01:10:13,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:10:13,317 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 01:10:13,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-04-14 01:10:13,518 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 01:10:13,518 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 01:10:13,518 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:10:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1795736587, now seen corresponding path program 11 times [2025-04-14 01:10:13,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:10:13,519 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538322293] [2025-04-14 01:10:13,519 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:10:13,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:10:13,524 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:10:13,529 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:10:13,529 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:10:13,529 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:10:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:10:13,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:10:13,715 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538322293] [2025-04-14 01:10:13,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538322293] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:10:13,715 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251616559] [2025-04-14 01:10:13,715 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:10:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:10:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:10:13,718 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 01:10:13,719 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 01:10:13,770 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:10:13,786 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:10:13,786 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:10:13,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:10:13,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:10:13,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:10:13,898 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 01:10:13,903 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 01:10:13,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:10:13,917 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:10:13,918 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 19 treesize of output 16 [2025-04-14 01:10:13,959 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 01:10:13,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251616559] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:10:13,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:10:13,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2025-04-14 01:10:13,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993481629] [2025-04-14 01:10:13,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:10:13,960 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:10:13,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:10:13,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:10:13,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:10:13,961 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:10:13,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 2074 transitions, 35891 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 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 01:10:13,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:10:13,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:10:13,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:10:22,179 INFO L116 PetriNetUnfolderBase]: 20178/28103 cut-off events. [2025-04-14 01:10:22,179 INFO L117 PetriNetUnfolderBase]: For 463446/463446 co-relation queries the response was YES. [2025-04-14 01:10:22,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222650 conditions, 28103 events. 20178/28103 cut-off events. For 463446/463446 co-relation queries the response was YES. Maximal size of possible extension queue 1604. Compared 168343 event pairs, 2571 based on Foata normal form. 1/23387 useless extension candidates. Maximal degree in co-relation 222253. Up to 26980 conditions per place. [2025-04-14 01:10:22,683 INFO L140 encePairwiseOnDemand]: 17/30 looper letters, 1780 selfloop transitions, 351 changer transitions 2/2133 dead transitions. [2025-04-14 01:10:22,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 2133 transitions, 40807 flow [2025-04-14 01:10:22,684 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-14 01:10:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-14 01:10:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 129 transitions. [2025-04-14 01:10:22,684 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33076923076923076 [2025-04-14 01:10:22,684 INFO L175 Difference]: Start difference. First operand has 396 places, 2074 transitions, 35891 flow. Second operand 13 states and 129 transitions. [2025-04-14 01:10:22,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 2133 transitions, 40807 flow [2025-04-14 01:10:32,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 2133 transitions, 39920 flow, removed 372 selfloop flow, removed 4 redundant places. [2025-04-14 01:10:32,071 INFO L231 Difference]: Finished difference. Result has 407 places, 2097 transitions, 36219 flow [2025-04-14 01:10:32,073 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=35004, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=36219, PETRI_PLACES=407, PETRI_TRANSITIONS=2097} [2025-04-14 01:10:32,073 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2025-04-14 01:10:32,073 INFO L485 AbstractCegarLoop]: Abstraction has has 407 places, 2097 transitions, 36219 flow [2025-04-14 01:10:32,073 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 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 01:10:32,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:10:32,073 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 01:10:32,079 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 01:10:32,274 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 01:10:32,274 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 01:10:32,274 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:10:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1834496333, now seen corresponding path program 12 times [2025-04-14 01:10:32,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:10:32,275 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133711121] [2025-04-14 01:10:32,275 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:10:32,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:10:32,280 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:10:32,284 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:10:32,288 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:10:32,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:10:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:10:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:10:32,469 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133711121] [2025-04-14 01:10:32,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133711121] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:10:32,469 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497543386] [2025-04-14 01:10:32,469 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:10:32,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:10:32,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:10:32,471 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 01:10:32,473 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 01:10:32,519 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:10:32,537 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:10:32,537 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:10:32,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:10:32,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:10:32,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:10:32,630 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 01:10:32,636 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 01:10:32,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:10:32,675 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:10:32,675 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 19 treesize of output 16 [2025-04-14 01:10:32,719 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 01:10:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497543386] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:10:32,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:10:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2025-04-14 01:10:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753380152] [2025-04-14 01:10:32,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:10:32,720 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:10:32,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:10:32,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:10:32,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:10:32,721 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:10:32,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 2097 transitions, 36219 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 01:10:32,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:10:32,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:10:32,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:10:41,280 INFO L116 PetriNetUnfolderBase]: 20196/28140 cut-off events. [2025-04-14 01:10:41,280 INFO L117 PetriNetUnfolderBase]: For 433137/433137 co-relation queries the response was YES. [2025-04-14 01:10:41,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220925 conditions, 28140 events. 20196/28140 cut-off events. For 433137/433137 co-relation queries the response was YES. Maximal size of possible extension queue 1608. Compared 168759 event pairs, 2490 based on Foata normal form. 1/23442 useless extension candidates. Maximal degree in co-relation 220524. Up to 27056 conditions per place. [2025-04-14 01:10:41,843 INFO L140 encePairwiseOnDemand]: 17/30 looper letters, 1797 selfloop transitions, 339 changer transitions 3/2139 dead transitions. [2025-04-14 01:10:41,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 2139 transitions, 40872 flow [2025-04-14 01:10:41,844 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:10:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:10:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2025-04-14 01:10:41,844 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2025-04-14 01:10:41,844 INFO L175 Difference]: Start difference. First operand has 407 places, 2097 transitions, 36219 flow. Second operand 14 states and 135 transitions. [2025-04-14 01:10:41,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 2139 transitions, 40872 flow [2025-04-14 01:10:49,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 2139 transitions, 40241 flow, removed 154 selfloop flow, removed 6 redundant places. [2025-04-14 01:10:49,509 INFO L231 Difference]: Finished difference. Result has 415 places, 2101 transitions, 36436 flow [2025-04-14 01:10:49,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=35588, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=36436, PETRI_PLACES=415, PETRI_TRANSITIONS=2101} [2025-04-14 01:10:49,511 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2025-04-14 01:10:49,511 INFO L485 AbstractCegarLoop]: Abstraction has has 415 places, 2101 transitions, 36436 flow [2025-04-14 01:10:49,511 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 01:10:49,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:10:49,511 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 01:10:49,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-04-14 01:10:49,711 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 01:10:49,712 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 01:10:49,712 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:10:49,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1181169633, now seen corresponding path program 13 times [2025-04-14 01:10:49,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:10:49,712 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565822769] [2025-04-14 01:10:49,712 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:10:49,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:10:49,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:10:49,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:10:49,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:10:49,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:10:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:10:49,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:10:49,933 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565822769] [2025-04-14 01:10:49,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565822769] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:10:49,933 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400097970] [2025-04-14 01:10:49,933 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:10:49,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:10:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:10:49,935 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 01:10:49,935 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 01:10:49,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:10:49,990 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:10:49,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:10:49,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:10:49,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:10:49,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:10:50,015 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 01:10:50,114 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 01:10:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:10:50,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:10:50,205 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 01:10:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400097970] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:10:50,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:10:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 20 [2025-04-14 01:10:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063159132] [2025-04-14 01:10:50,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:10:50,206 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 01:10:50,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:10:50,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 01:10:50,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2025-04-14 01:10:50,207 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:10:50,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 2101 transitions, 36436 flow. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 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 01:10:50,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:10:50,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:10:50,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:11:01,034 INFO L116 PetriNetUnfolderBase]: 23007/32158 cut-off events. [2025-04-14 01:11:01,034 INFO L117 PetriNetUnfolderBase]: For 507736/507736 co-relation queries the response was YES. [2025-04-14 01:11:01,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254030 conditions, 32158 events. 23007/32158 cut-off events. For 507736/507736 co-relation queries the response was YES. Maximal size of possible extension queue 1853. Compared 198889 event pairs, 2774 based on Foata normal form. 5/26840 useless extension candidates. Maximal degree in co-relation 253627. Up to 24821 conditions per place. [2025-04-14 01:11:01,626 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1599 selfloop transitions, 1288 changer transitions 2/2889 dead transitions. [2025-04-14 01:11:01,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2889 transitions, 54208 flow [2025-04-14 01:11:01,627 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-14 01:11:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-14 01:11:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 397 transitions. [2025-04-14 01:11:01,628 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35765765765765767 [2025-04-14 01:11:01,628 INFO L175 Difference]: Start difference. First operand has 415 places, 2101 transitions, 36436 flow. Second operand 37 states and 397 transitions. [2025-04-14 01:11:01,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2889 transitions, 54208 flow [2025-04-14 01:11:10,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 2889 transitions, 53595 flow, removed 72 selfloop flow, removed 10 redundant places. [2025-04-14 01:11:10,593 INFO L231 Difference]: Finished difference. Result has 461 places, 2665 transitions, 50176 flow [2025-04-14 01:11:10,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=35938, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=757, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=50176, PETRI_PLACES=461, PETRI_TRANSITIONS=2665} [2025-04-14 01:11:10,595 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2025-04-14 01:11:10,595 INFO L485 AbstractCegarLoop]: Abstraction has has 461 places, 2665 transitions, 50176 flow [2025-04-14 01:11:10,595 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 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 01:11:10,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:11:10,595 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 01:11:10,601 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 01:11:10,795 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 01:11:10,796 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 01:11:10,796 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:11:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash -38260021, now seen corresponding path program 14 times [2025-04-14 01:11:10,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:11:10,796 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67238313] [2025-04-14 01:11:10,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:11:10,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:11:10,801 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:11:10,806 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:11:10,807 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:11:10,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:11:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:11:10,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:11:10,969 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67238313] [2025-04-14 01:11:10,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67238313] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:11:10,969 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061159383] [2025-04-14 01:11:10,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:11:10,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:11:10,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:11:10,971 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 01:11:10,972 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 01:11:11,015 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:11:11,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:11:11,028 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:11:11,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:11:11,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:11:11,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:11:11,112 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 01:11:11,117 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 01:11:11,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:11:11,178 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:11:11,178 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 19 treesize of output 16 [2025-04-14 01:11:11,213 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 01:11:11,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061159383] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:11:11,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:11:11,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2025-04-14 01:11:11,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417873004] [2025-04-14 01:11:11,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:11:11,214 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:11:11,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:11:11,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:11:11,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:11:11,214 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:11:11,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2665 transitions, 50176 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 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 01:11:11,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:11:11,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:11:11,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:11:23,369 INFO L116 PetriNetUnfolderBase]: 23091/32296 cut-off events. [2025-04-14 01:11:23,369 INFO L117 PetriNetUnfolderBase]: For 545383/545383 co-relation queries the response was YES. [2025-04-14 01:11:23,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269708 conditions, 32296 events. 23091/32296 cut-off events. For 545383/545383 co-relation queries the response was YES. Maximal size of possible extension queue 1862. Compared 200264 event pairs, 2823 based on Foata normal form. 2/26948 useless extension candidates. Maximal degree in co-relation 269284. Up to 26550 conditions per place. [2025-04-14 01:11:24,046 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 1812 selfloop transitions, 987 changer transitions 4/2803 dead transitions. [2025-04-14 01:11:24,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 2803 transitions, 57647 flow [2025-04-14 01:11:24,047 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 01:11:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 01:11:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 212 transitions. [2025-04-14 01:11:24,048 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35333333333333333 [2025-04-14 01:11:24,048 INFO L175 Difference]: Start difference. First operand has 461 places, 2665 transitions, 50176 flow. Second operand 20 states and 212 transitions. [2025-04-14 01:11:24,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 2803 transitions, 57647 flow [2025-04-14 01:11:35,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 2803 transitions, 56641 flow, removed 466 selfloop flow, removed 5 redundant places. [2025-04-14 01:11:35,708 INFO L231 Difference]: Finished difference. Result has 481 places, 2700 transitions, 52549 flow [2025-04-14 01:11:35,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=49264, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=953, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=52549, PETRI_PLACES=481, PETRI_TRANSITIONS=2700} [2025-04-14 01:11:35,710 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 451 predicate places. [2025-04-14 01:11:35,710 INFO L485 AbstractCegarLoop]: Abstraction has has 481 places, 2700 transitions, 52549 flow [2025-04-14 01:11:35,710 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 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 01:11:35,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:11:35,710 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 01:11:35,716 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 01:11:35,910 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 01:11:35,911 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 01:11:35,911 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:11:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1725682135, now seen corresponding path program 15 times [2025-04-14 01:11:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:11:35,911 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702446] [2025-04-14 01:11:35,912 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:11:35,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:11:35,916 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:11:35,920 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:11:35,920 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:11:35,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:11:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:11:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:11:36,160 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702446] [2025-04-14 01:11:36,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702446] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:11:36,161 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682235813] [2025-04-14 01:11:36,161 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:11:36,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:11:36,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:11:36,162 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 01:11:36,163 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 01:11:36,206 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:11:36,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:11:36,218 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:11:36,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:11:36,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:11:36,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:11:36,288 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 01:11:36,294 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 01:11:36,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:11:36,331 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:11:36,331 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 19 treesize of output 16 [2025-04-14 01:11:36,367 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 01:11:36,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682235813] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:11:36,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:11:36,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2025-04-14 01:11:36,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277932601] [2025-04-14 01:11:36,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:11:36,368 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:11:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:11:36,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:11:36,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:11:36,368 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:11:36,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 2700 transitions, 52549 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 01:11:36,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:11:36,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:11:36,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:11:48,807 INFO L116 PetriNetUnfolderBase]: 23152/32401 cut-off events. [2025-04-14 01:11:48,808 INFO L117 PetriNetUnfolderBase]: For 566139/566139 co-relation queries the response was YES. [2025-04-14 01:11:49,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277068 conditions, 32401 events. 23152/32401 cut-off events. For 566139/566139 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 201431 event pairs, 2847 based on Foata normal form. 1/27030 useless extension candidates. Maximal degree in co-relation 276639. Up to 26624 conditions per place. [2025-04-14 01:11:49,462 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 1816 selfloop transitions, 995 changer transitions 3/2814 dead transitions. [2025-04-14 01:11:49,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 2814 transitions, 59474 flow [2025-04-14 01:11:49,462 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 01:11:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 01:11:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 207 transitions. [2025-04-14 01:11:49,463 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3631578947368421 [2025-04-14 01:11:49,463 INFO L175 Difference]: Start difference. First operand has 481 places, 2700 transitions, 52549 flow. Second operand 19 states and 207 transitions. [2025-04-14 01:11:49,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 2814 transitions, 59474 flow [2025-04-14 01:12:02,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2814 transitions, 59050 flow, removed 168 selfloop flow, removed 4 redundant places. [2025-04-14 01:12:02,219 INFO L231 Difference]: Finished difference. Result has 498 places, 2714 transitions, 54381 flow [2025-04-14 01:12:02,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52125, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=54381, PETRI_PLACES=498, PETRI_TRANSITIONS=2714} [2025-04-14 01:12:02,222 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 468 predicate places. [2025-04-14 01:12:02,222 INFO L485 AbstractCegarLoop]: Abstraction has has 498 places, 2714 transitions, 54381 flow [2025-04-14 01:12:02,222 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 01:12:02,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:12:02,222 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 01:12:02,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-04-14 01:12:02,422 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 01:12:02,423 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 01:12:02,423 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:12:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2031429583, now seen corresponding path program 16 times [2025-04-14 01:12:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:12:02,423 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831232693] [2025-04-14 01:12:02,423 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:12:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:12:02,428 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:12:02,431 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:12:02,431 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:12:02,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:12:02,575 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 01:12:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:12:02,575 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831232693] [2025-04-14 01:12:02,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831232693] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:12:02,575 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262169089] [2025-04-14 01:12:02,575 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:12:02,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:12:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:12:02,577 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 01:12:02,578 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 01:12:02,622 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:12:02,636 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:12:02,636 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:12:02,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:12:02,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:12:02,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:12:02,650 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 01:12:02,723 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 01:12:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:12:02,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:12:02,801 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 01:12:02,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262169089] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:12:02,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:12:02,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 17 [2025-04-14 01:12:02,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119406949] [2025-04-14 01:12:02,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:12:02,802 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:12:02,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:12:02,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:12:02,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:12:02,802 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:12:02,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 2714 transitions, 54381 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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 01:12:02,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:12:02,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:12:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:12:16,064 INFO L116 PetriNetUnfolderBase]: 23168/32432 cut-off events. [2025-04-14 01:12:16,064 INFO L117 PetriNetUnfolderBase]: For 580216/580216 co-relation queries the response was YES. [2025-04-14 01:12:16,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282191 conditions, 32432 events. 23168/32432 cut-off events. For 580216/580216 co-relation queries the response was YES. Maximal size of possible extension queue 1892. Compared 202048 event pairs, 2565 based on Foata normal form. 1/27057 useless extension candidates. Maximal degree in co-relation 281758. Up to 26663 conditions per place. [2025-04-14 01:12:16,990 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1839 selfloop transitions, 1048 changer transitions 3/2890 dead transitions. [2025-04-14 01:12:16,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2890 transitions, 62251 flow [2025-04-14 01:12:16,991 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 01:12:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 01:12:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 277 transitions. [2025-04-14 01:12:16,992 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38472222222222224 [2025-04-14 01:12:16,992 INFO L175 Difference]: Start difference. First operand has 498 places, 2714 transitions, 54381 flow. Second operand 24 states and 277 transitions. [2025-04-14 01:12:16,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2890 transitions, 62251 flow [2025-04-14 01:12:30,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 2890 transitions, 60973 flow, removed 59 selfloop flow, removed 13 redundant places. [2025-04-14 01:12:30,610 INFO L231 Difference]: Finished difference. Result has 512 places, 2730 transitions, 55770 flow [2025-04-14 01:12:30,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=53107, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=55770, PETRI_PLACES=512, PETRI_TRANSITIONS=2730} [2025-04-14 01:12:30,612 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 482 predicate places. [2025-04-14 01:12:30,612 INFO L485 AbstractCegarLoop]: Abstraction has has 512 places, 2730 transitions, 55770 flow [2025-04-14 01:12:30,613 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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 01:12:30,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:12:30,613 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 01:12:30,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-04-14 01:12:30,813 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 01:12:30,814 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 01:12:30,814 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:12:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -576115599, now seen corresponding path program 17 times [2025-04-14 01:12:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:12:30,814 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551141401] [2025-04-14 01:12:30,814 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:12:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:12:30,819 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:12:30,823 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:12:30,823 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:12:30,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:12:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:12:30,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:12:30,978 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551141401] [2025-04-14 01:12:30,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551141401] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:12:30,979 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516373145] [2025-04-14 01:12:30,979 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:12:30,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:12:30,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:12:30,981 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 01:12:30,981 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 01:12:31,026 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:12:31,040 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:12:31,040 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:12:31,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:12:31,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:12:31,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:12:31,143 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 01:12:31,146 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 01:12:31,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:12:31,181 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:12:31,181 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 19 treesize of output 16 [2025-04-14 01:12:31,211 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 01:12:31,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516373145] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:12:31,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:12:31,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2025-04-14 01:12:31,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296593080] [2025-04-14 01:12:31,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:12:31,212 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:12:31,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:12:31,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:12:31,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:12:31,213 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:12:31,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 2730 transitions, 55770 flow. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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 01:12:31,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:12:31,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:12:31,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:12:44,355 INFO L116 PetriNetUnfolderBase]: 23453/32828 cut-off events. [2025-04-14 01:12:44,356 INFO L117 PetriNetUnfolderBase]: For 599606/599606 co-relation queries the response was YES. [2025-04-14 01:12:45,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292606 conditions, 32828 events. 23453/32828 cut-off events. For 599606/599606 co-relation queries the response was YES. Maximal size of possible extension queue 1919. Compared 204885 event pairs, 2588 based on Foata normal form. 2/27416 useless extension candidates. Maximal degree in co-relation 292168. Up to 26896 conditions per place. [2025-04-14 01:12:45,213 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1884 selfloop transitions, 1077 changer transitions 4/2965 dead transitions. [2025-04-14 01:12:45,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 2965 transitions, 65300 flow [2025-04-14 01:12:45,213 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 01:12:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 01:12:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 302 transitions. [2025-04-14 01:12:45,214 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3728395061728395 [2025-04-14 01:12:45,214 INFO L175 Difference]: Start difference. First operand has 512 places, 2730 transitions, 55770 flow. Second operand 27 states and 302 transitions. [2025-04-14 01:12:45,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 2965 transitions, 65300 flow [2025-04-14 01:12:59,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 2965 transitions, 64122 flow, removed 115 selfloop flow, removed 10 redundant places. [2025-04-14 01:12:59,178 INFO L231 Difference]: Finished difference. Result has 531 places, 2776 transitions, 58111 flow [2025-04-14 01:12:59,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=54659, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=58111, PETRI_PLACES=531, PETRI_TRANSITIONS=2776} [2025-04-14 01:12:59,181 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 501 predicate places. [2025-04-14 01:12:59,181 INFO L485 AbstractCegarLoop]: Abstraction has has 531 places, 2776 transitions, 58111 flow [2025-04-14 01:12:59,181 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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 01:12:59,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:12:59,181 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 01:12:59,187 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 01:12:59,381 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 01:12:59,382 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 01:12:59,382 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:12:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1427757853, now seen corresponding path program 18 times [2025-04-14 01:12:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:12:59,383 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647110010] [2025-04-14 01:12:59,383 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:12:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:12:59,387 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:12:59,391 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:12:59,391 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:12:59,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:12:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:12:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:12:59,569 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647110010] [2025-04-14 01:12:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647110010] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:12:59,569 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833354609] [2025-04-14 01:12:59,569 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:12:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:12:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:12:59,571 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 01:12:59,572 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 01:12:59,617 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:12:59,630 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:12:59,631 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:12:59,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:12:59,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:12:59,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:12:59,712 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:12:59,712 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 01:12:59,731 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 01:12:59,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:12:59,780 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:12:59,780 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 19 treesize of output 16 [2025-04-14 01:12:59,808 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 01:12:59,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833354609] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:12:59,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:12:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2025-04-14 01:12:59,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135514081] [2025-04-14 01:12:59,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:12:59,809 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:12:59,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:12:59,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:12:59,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:12:59,809 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:12:59,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 2776 transitions, 58111 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 01:12:59,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:12:59,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:12:59,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:13:16,035 INFO L116 PetriNetUnfolderBase]: 26136/36663 cut-off events. [2025-04-14 01:13:16,036 INFO L117 PetriNetUnfolderBase]: For 715581/715581 co-relation queries the response was YES. [2025-04-14 01:13:17,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330194 conditions, 36663 events. 26136/36663 cut-off events. For 715581/715581 co-relation queries the response was YES. Maximal size of possible extension queue 2107. Compared 232643 event pairs, 1855 based on Foata normal form. 1/30596 useless extension candidates. Maximal degree in co-relation 329753. Up to 22991 conditions per place. [2025-04-14 01:13:18,000 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1432 selfloop transitions, 1899 changer transitions 2/3333 dead transitions. [2025-04-14 01:13:18,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 3333 transitions, 73675 flow [2025-04-14 01:13:18,001 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 01:13:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 01:13:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 409 transitions. [2025-04-14 01:13:18,003 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38952380952380955 [2025-04-14 01:13:18,003 INFO L175 Difference]: Start difference. First operand has 531 places, 2776 transitions, 58111 flow. Second operand 35 states and 409 transitions. [2025-04-14 01:13:18,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 3333 transitions, 73675 flow [2025-04-14 01:13:34,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 3333 transitions, 72154 flow, removed 128 selfloop flow, removed 18 redundant places. [2025-04-14 01:13:34,231 INFO L231 Difference]: Finished difference. Result has 557 places, 3057 transitions, 68365 flow [2025-04-14 01:13:34,233 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56645, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=68365, PETRI_PLACES=557, PETRI_TRANSITIONS=3057} [2025-04-14 01:13:34,233 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 527 predicate places. [2025-04-14 01:13:34,233 INFO L485 AbstractCegarLoop]: Abstraction has has 557 places, 3057 transitions, 68365 flow [2025-04-14 01:13:34,233 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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 01:13:34,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:13:34,233 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 01:13:34,239 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 01:13:34,434 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 01:13:34,434 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 01:13:34,435 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:13:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1405646769, now seen corresponding path program 19 times [2025-04-14 01:13:34,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:13:34,435 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095732965] [2025-04-14 01:13:34,435 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:13:34,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:13:34,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:13:34,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:13:34,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:13:34,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:13:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:13:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:13:34,707 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095732965] [2025-04-14 01:13:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095732965] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:13:34,707 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122365958] [2025-04-14 01:13:34,707 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:13:34,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:13:34,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:13:34,709 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 01:13:34,709 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 01:13:34,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:13:34,770 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:13:34,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:13:34,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:13:34,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:13:34,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:13:34,790 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 01:13:34,897 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 01:13:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:13:34,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:13:35,002 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 01:13:35,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122365958] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:13:35,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:13:35,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 20 [2025-04-14 01:13:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327074119] [2025-04-14 01:13:35,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:13:35,002 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 01:13:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:13:35,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 01:13:35,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2025-04-14 01:13:35,003 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:13:35,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 3057 transitions, 68365 flow. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 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 01:13:35,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:13:35,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:13:35,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:13:53,505 INFO L116 PetriNetUnfolderBase]: 27368/38451 cut-off events. [2025-04-14 01:13:53,505 INFO L117 PetriNetUnfolderBase]: For 837939/837939 co-relation queries the response was YES. [2025-04-14 01:13:54,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365857 conditions, 38451 events. 27368/38451 cut-off events. For 837939/837939 co-relation queries the response was YES. Maximal size of possible extension queue 2198. Compared 246397 event pairs, 2168 based on Foata normal form. 2/32054 useless extension candidates. Maximal degree in co-relation 365401. Up to 25876 conditions per place. [2025-04-14 01:13:54,924 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 1754 selfloop transitions, 1861 changer transitions 4/3619 dead transitions. [2025-04-14 01:13:54,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 3619 transitions, 83189 flow [2025-04-14 01:13:54,924 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-04-14 01:13:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2025-04-14 01:13:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 651 transitions. [2025-04-14 01:13:54,926 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3557377049180328 [2025-04-14 01:13:54,926 INFO L175 Difference]: Start difference. First operand has 557 places, 3057 transitions, 68365 flow. Second operand 61 states and 651 transitions. [2025-04-14 01:13:54,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 3619 transitions, 83189 flow [2025-04-14 01:14:17,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 3619 transitions, 81208 flow, removed 654 selfloop flow, removed 12 redundant places. [2025-04-14 01:14:17,070 INFO L231 Difference]: Finished difference. Result has 613 places, 3216 transitions, 74626 flow [2025-04-14 01:14:17,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66627, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=74626, PETRI_PLACES=613, PETRI_TRANSITIONS=3216} [2025-04-14 01:14:17,072 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 583 predicate places. [2025-04-14 01:14:17,072 INFO L485 AbstractCegarLoop]: Abstraction has has 613 places, 3216 transitions, 74626 flow [2025-04-14 01:14:17,072 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 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 01:14:17,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:14:17,073 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] [2025-04-14 01:14:17,080 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 01:14:17,273 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 01:14:17,273 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 01:14:17,274 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:14:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1564900349, now seen corresponding path program 20 times [2025-04-14 01:14:17,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:14:17,274 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401858683] [2025-04-14 01:14:17,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:14:17,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:14:17,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:14:17,284 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:14:17,284 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:14:17,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:14:17,347 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 01:14:17,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:14:17,347 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401858683] [2025-04-14 01:14:17,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401858683] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:14:17,347 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166670141] [2025-04-14 01:14:17,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:14:17,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:14:17,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:14:17,350 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 01:14:17,350 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 01:14:17,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:14:17,409 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:14:17,409 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:14:17,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:14:17,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:14:17,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:14:17,451 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 01:14:17,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:14:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:14:17,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166670141] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:14:17,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:14:17,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-04-14 01:14:17,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473704254] [2025-04-14 01:14:17,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:14:17,501 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:14:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:14:17,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:14:17,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:14:17,502 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:14:17,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 3216 transitions, 74626 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 01:14:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:14:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:14:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:14:50,258 INFO L116 PetriNetUnfolderBase]: 48516/68646 cut-off events. [2025-04-14 01:14:50,259 INFO L117 PetriNetUnfolderBase]: For 1533898/1533898 co-relation queries the response was YES. [2025-04-14 01:14:54,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651443 conditions, 68646 events. 48516/68646 cut-off events. For 1533898/1533898 co-relation queries the response was YES. Maximal size of possible extension queue 3742. Compared 477897 event pairs, 8526 based on Foata normal form. 2/57141 useless extension candidates. Maximal degree in co-relation 650468. Up to 28572 conditions per place. [2025-04-14 01:14:54,646 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 5026 selfloop transitions, 504 changer transitions 2/5532 dead transitions. [2025-04-14 01:14:54,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 5532 transitions, 133508 flow [2025-04-14 01:14:54,646 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 01:14:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 01:14:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2025-04-14 01:14:54,647 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2025-04-14 01:14:54,647 INFO L175 Difference]: Start difference. First operand has 613 places, 3216 transitions, 74626 flow. Second operand 8 states and 125 transitions. [2025-04-14 01:14:54,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 5532 transitions, 133508 flow [2025-04-14 01:15:48,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 5532 transitions, 130943 flow, removed 255 selfloop flow, removed 27 redundant places. [2025-04-14 01:15:48,440 INFO L231 Difference]: Finished difference. Result has 598 places, 3478 transitions, 80692 flow [2025-04-14 01:15:48,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=72405, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=80692, PETRI_PLACES=598, PETRI_TRANSITIONS=3478} [2025-04-14 01:15:48,443 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 568 predicate places. [2025-04-14 01:15:48,443 INFO L485 AbstractCegarLoop]: Abstraction has has 598 places, 3478 transitions, 80692 flow [2025-04-14 01:15:48,443 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 01:15:48,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:15:48,443 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] [2025-04-14 01:15:48,450 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 01:15:48,643 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 01:15:48,644 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 01:15:48,644 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:15:48,644 INFO L85 PathProgramCache]: Analyzing trace with hash -633554430, now seen corresponding path program 7 times [2025-04-14 01:15:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:15:48,644 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726958142] [2025-04-14 01:15:48,644 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:15:48,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:15:48,649 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:15:48,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:15:48,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:15:48,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:15:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:15:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:15:48,687 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726958142] [2025-04-14 01:15:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726958142] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:15:48,687 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224288194] [2025-04-14 01:15:48,687 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:15:48,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:15:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:15:48,689 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 01:15:48,690 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 01:15:48,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:15:48,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:15:48,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:15:48,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:15:48,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:15:48,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:15:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:15:48,786 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:15:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:15:48,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224288194] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:15:48,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:15:48,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-04-14 01:15:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42534191] [2025-04-14 01:15:48,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:15:48,817 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:15:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:15:48,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:15:48,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:15:48,818 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:15:48,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 3478 transitions, 80692 flow. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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 01:15:48,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:15:48,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:15:48,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:16:21,989 INFO L116 PetriNetUnfolderBase]: 44133/63641 cut-off events. [2025-04-14 01:16:21,989 INFO L117 PetriNetUnfolderBase]: For 1598365/1598365 co-relation queries the response was YES. [2025-04-14 01:16:25,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599424 conditions, 63641 events. 44133/63641 cut-off events. For 1598365/1598365 co-relation queries the response was YES. Maximal size of possible extension queue 3717. Compared 462167 event pairs, 9265 based on Foata normal form. 2870/59956 useless extension candidates. Maximal degree in co-relation 598050. Up to 29821 conditions per place. [2025-04-14 01:16:25,458 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 4264 selfloop transitions, 445 changer transitions 40/4749 dead transitions. [2025-04-14 01:16:25,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 4749 transitions, 114857 flow [2025-04-14 01:16:25,458 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:16:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:16:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2025-04-14 01:16:25,459 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2025-04-14 01:16:25,459 INFO L175 Difference]: Start difference. First operand has 598 places, 3478 transitions, 80692 flow. Second operand 7 states and 104 transitions. [2025-04-14 01:16:25,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 4749 transitions, 114857 flow [2025-04-14 01:17:12,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 4749 transitions, 114697 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-04-14 01:17:12,151 INFO L231 Difference]: Finished difference. Result has 602 places, 3437 transitions, 82476 flow [2025-04-14 01:17:12,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=76641, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=82476, PETRI_PLACES=602, PETRI_TRANSITIONS=3437} [2025-04-14 01:17:12,153 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 572 predicate places. [2025-04-14 01:17:12,153 INFO L485 AbstractCegarLoop]: Abstraction has has 602 places, 3437 transitions, 82476 flow [2025-04-14 01:17:12,153 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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 01:17:12,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:17:12,154 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] [2025-04-14 01:17:12,160 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 01:17:12,354 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 01:17:12,354 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 01:17:12,355 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:17:12,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1027828207, now seen corresponding path program 21 times [2025-04-14 01:17:12,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:17:12,355 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376930059] [2025-04-14 01:17:12,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:17:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:17:12,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:17:12,363 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:17:12,363 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:17:12,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:17:12,402 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 01:17:12,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:17:12,402 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376930059] [2025-04-14 01:17:12,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376930059] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:17:12,402 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846139339] [2025-04-14 01:17:12,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:17:12,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:17:12,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:17:12,404 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 01:17:12,406 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 01:17:12,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:17:12,466 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:17:12,467 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:17:12,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:17:12,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:17:12,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:17:12,506 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 01:17:12,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:17:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:17:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846139339] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:17:12,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:17:12,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-04-14 01:17:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826975318] [2025-04-14 01:17:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:17:12,549 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:17:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:17:12,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:17:12,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:17:12,550 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:17:12,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 3437 transitions, 82476 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 01:17:12,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:17:12,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:17:12,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:17:48,260 INFO L116 PetriNetUnfolderBase]: 46911/67562 cut-off events. [2025-04-14 01:17:48,260 INFO L117 PetriNetUnfolderBase]: For 1742270/1742270 co-relation queries the response was YES. [2025-04-14 01:17:51,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644142 conditions, 67562 events. 46911/67562 cut-off events. For 1742270/1742270 co-relation queries the response was YES. Maximal size of possible extension queue 3883. Compared 489238 event pairs, 6668 based on Foata normal form. 36/60431 useless extension candidates. Maximal degree in co-relation 642730. Up to 45105 conditions per place. [2025-04-14 01:17:51,788 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 4191 selfloop transitions, 218 changer transitions 5/4414 dead transitions. [2025-04-14 01:17:51,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 4414 transitions, 110544 flow [2025-04-14 01:17:51,788 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 01:17:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 01:17:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2025-04-14 01:17:51,789 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2025-04-14 01:17:51,789 INFO L175 Difference]: Start difference. First operand has 602 places, 3437 transitions, 82476 flow. Second operand 8 states and 119 transitions. [2025-04-14 01:17:51,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 4414 transitions, 110544 flow [2025-04-14 01:18:49,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 4414 transitions, 110383 flow, removed 77 selfloop flow, removed 3 redundant places. [2025-04-14 01:18:49,377 INFO L231 Difference]: Finished difference. Result has 609 places, 3454 transitions, 83562 flow [2025-04-14 01:18:49,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=82305, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=83562, PETRI_PLACES=609, PETRI_TRANSITIONS=3454} [2025-04-14 01:18:49,380 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 579 predicate places. [2025-04-14 01:18:49,380 INFO L485 AbstractCegarLoop]: Abstraction has has 609 places, 3454 transitions, 83562 flow [2025-04-14 01:18:49,380 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 01:18:49,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:18:49,380 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] [2025-04-14 01:18:49,389 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 01:18:49,581 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 01:18:49,581 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 01:18:49,582 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:18:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash 154698687, now seen corresponding path program 22 times [2025-04-14 01:18:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:18:49,582 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427068232] [2025-04-14 01:18:49,582 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:18:49,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:18:49,587 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:18:49,589 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 01:18:49,590 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:18:49,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:18:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:18:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:18:49,622 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427068232] [2025-04-14 01:18:49,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427068232] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:18:49,622 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367921238] [2025-04-14 01:18:49,623 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:18:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:18:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:18:49,624 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 01:18:49,625 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 01:18:49,676 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 01:18:49,689 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 01:18:49,689 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:18:49,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:18:49,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:18:49,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:18:49,745 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 01:18:49,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:18:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:18:49,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367921238] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:18:49,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:18:49,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-04-14 01:18:49,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127397143] [2025-04-14 01:18:49,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:18:49,783 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:18:49,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:18:49,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:18:49,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:18:49,783 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:18:49,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 3454 transitions, 83562 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 01:18:49,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:18:49,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:18:49,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:19:27,560 INFO L116 PetriNetUnfolderBase]: 46804/67332 cut-off events. [2025-04-14 01:19:27,561 INFO L117 PetriNetUnfolderBase]: For 1736045/1736045 co-relation queries the response was YES. [2025-04-14 01:19:31,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643778 conditions, 67332 events. 46804/67332 cut-off events. For 1736045/1736045 co-relation queries the response was YES. Maximal size of possible extension queue 3891. Compared 487073 event pairs, 14281 based on Foata normal form. 58/60223 useless extension candidates. Maximal degree in co-relation 642552. Up to 37778 conditions per place. [2025-04-14 01:19:31,409 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 4239 selfloop transitions, 53 changer transitions 1/4293 dead transitions. [2025-04-14 01:19:31,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 4293 transitions, 108004 flow [2025-04-14 01:19:31,410 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:19:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:19:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2025-04-14 01:19:31,410 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2025-04-14 01:19:31,410 INFO L175 Difference]: Start difference. First operand has 609 places, 3454 transitions, 83562 flow. Second operand 7 states and 96 transitions. [2025-04-14 01:19:31,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 4293 transitions, 108004 flow [2025-04-14 01:20:34,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 4293 transitions, 107866 flow, removed 64 selfloop flow, removed 3 redundant places. [2025-04-14 01:20:34,116 INFO L231 Difference]: Finished difference. Result has 614 places, 3445 transitions, 83480 flow [2025-04-14 01:20:34,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=83141, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=83480, PETRI_PLACES=614, PETRI_TRANSITIONS=3445} [2025-04-14 01:20:34,118 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 584 predicate places. [2025-04-14 01:20:34,119 INFO L485 AbstractCegarLoop]: Abstraction has has 614 places, 3445 transitions, 83480 flow [2025-04-14 01:20:34,119 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 01:20:34,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:20:34,119 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] [2025-04-14 01:20:34,127 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 01:20:34,319 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 01:20:34,320 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 01:20:34,320 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:20:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash -525618704, now seen corresponding path program 8 times [2025-04-14 01:20:34,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:20:34,321 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29794711] [2025-04-14 01:20:34,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:20:34,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:20:34,326 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:20:34,331 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:20:34,331 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:20:34,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:34,378 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 01:20:34,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:20:34,378 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29794711] [2025-04-14 01:20:34,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29794711] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:20:34,378 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173015324] [2025-04-14 01:20:34,378 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:20:34,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:20:34,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:20:34,380 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 01:20:34,381 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 01:20:34,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-14 01:20:34,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:20:34,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:20:34,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:20:34,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:20:34,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:20:34,489 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 01:20:34,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:20:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:20:34,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173015324] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:20:34,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:20:34,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2025-04-14 01:20:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854884791] [2025-04-14 01:20:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:20:34,528 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 01:20:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:20:34,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 01:20:34,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:20:34,528 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-14 01:20:34,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 3445 transitions, 83480 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 01:20:34,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:20:34,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-14 01:20:34,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2025-04-14 01:20:49,637 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 01:20:49,637 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:20:50,120 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:20:50,121 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-14 01:20:50,131 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 01:20:50,322 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 01:20:50,322 WARN L610 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (7states, 3/30 universal loopers) in iteration 38,while PetriNetUnfolder was constructing finite prefix that currently has 248602 conditions, 23598 events (16212/23597 cut-off events. For 781650/781650 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 178638 event pairs, 6237 based on Foata normal form. 0/25072 useless extension candidates. Maximal degree in co-relation 248301. Up to 13470 conditions per place.). [2025-04-14 01:20:50,325 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-14 01:20:50,326 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-14 01:20:50,326 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-14 01:20:50,326 INFO L422 BasicCegarLoop]: Path program histogram: [22, 8, 2, 2, 1, 1, 1, 1] [2025-04-14 01:20:50,337 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 01:20:50,337 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 01:20:50,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 01:20:50 BasicIcfg [2025-04-14 01:20:50,342 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 01:20:50,342 INFO L158 Benchmark]: Toolchain (without parser) took 771853.44ms. Allocated memory was 142.6MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 100.0MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 6.2GB. Max. memory is 8.0GB. [2025-04-14 01:20:50,342 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 163.6MB. Free memory is still 92.0MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:20:50,343 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.07ms. Allocated memory is still 142.6MB. Free memory was 100.0MB in the beginning and 84.9MB in the end (delta: 15.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-14 01:20:50,343 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.42ms. Allocated memory is still 142.6MB. Free memory was 84.9MB in the beginning and 82.3MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 01:20:50,343 INFO L158 Benchmark]: Boogie Preprocessor took 33.74ms. Allocated memory is still 142.6MB. Free memory was 82.3MB in the beginning and 80.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:20:50,343 INFO L158 Benchmark]: IcfgBuilder took 736.73ms. Allocated memory is still 142.6MB. Free memory was 80.8MB in the beginning and 86.8MB in the end (delta: -6.0MB). Peak memory consumption was 65.4MB. Max. memory is 8.0GB. [2025-04-14 01:20:50,343 INFO L158 Benchmark]: TraceAbstraction took 770829.98ms. Allocated memory was 142.6MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 86.4MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 6.1GB. Max. memory is 8.0GB. [2025-04-14 01:20:50,344 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 163.6MB. Free memory is still 92.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.07ms. Allocated memory is still 142.6MB. Free memory was 100.0MB in the beginning and 84.9MB in the end (delta: 15.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.42ms. Allocated memory is still 142.6MB. Free memory was 84.9MB in the beginning and 82.3MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.74ms. Allocated memory is still 142.6MB. Free memory was 82.3MB in the beginning and 80.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 736.73ms. Allocated memory is still 142.6MB. Free memory was 80.8MB in the beginning and 86.8MB in the end (delta: -6.0MB). Peak memory consumption was 65.4MB. Max. memory is 8.0GB. * TraceAbstraction took 770829.98ms. Allocated memory was 142.6MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 86.4MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 6.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (7states, 3/30 universal loopers) in iteration 38,while PetriNetUnfolder was constructing finite prefix that currently has 248602 conditions, 23598 events (16212/23597 cut-off events. For 781650/781650 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 178638 event pairs, 6237 based on Foata normal form. 0/25072 useless extension candidates. Maximal degree in co-relation 248301. Up to 13470 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (7states, 3/30 universal loopers) in iteration 38,while PetriNetUnfolder was constructing finite prefix that currently has 248602 conditions, 23598 events (16212/23597 cut-off events. For 781650/781650 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 178638 event pairs, 6237 based on Foata normal form. 0/25072 useless extension candidates. Maximal degree in co-relation 248301. Up to 13470 conditions per place.). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (7states, 3/30 universal loopers) in iteration 38,while PetriNetUnfolder was constructing finite prefix that currently has 248602 conditions, 23598 events (16212/23597 cut-off events. For 781650/781650 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 178638 event pairs, 6237 based on Foata normal form. 0/25072 useless extension candidates. Maximal degree in co-relation 248301. Up to 13470 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (7states, 3/30 universal loopers) in iteration 38,while PetriNetUnfolder was constructing finite prefix that currently has 248602 conditions, 23598 events (16212/23597 cut-off events. For 781650/781650 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 178638 event pairs, 6237 based on Foata normal form. 0/25072 useless extension candidates. Maximal degree in co-relation 248301. Up to 13470 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 49 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: 770.7s, OverallIterations: 38, TraceHistogramMax: 2, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 749.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4316 SdHoareTripleChecker+Valid, 10.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4316 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 8.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 330 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23948 IncrementalHoareTripleChecker+Invalid, 24278 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 330 mSolverCounterUnsat, 0 mSDtfsCounter, 23948 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1906 GetRequests, 1037 SyntacticMatches, 15 SemanticMatches, 854 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7240 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83562occurred in iteration=36, InterpolantAutomatonStates: 651, 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: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 1425 NumberOfCodeBlocks, 1425 NumberOfCodeBlocksAsserted, 124 NumberOfCheckSat, 1981 ConstructedInterpolants, 0 QuantifiedInterpolants, 16251 SizeOfPredicates, 365 NumberOfNonLiveVariables, 6425 ConjunctsInSsa, 757 ConjunctsInUnsatCore, 105 InterpolantComputations, 12 PerfectInterpolantSequences, 102/234 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