/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy7.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:52:48,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:52:48,753 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:52:48,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:52:48,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:52:48,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:52:48,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:52:48,775 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:52:48,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:52:48,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:52:48,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:52:48,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:52:48,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:52:48,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:52:48,778 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:52:48,778 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:52:48,779 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:52:48,779 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:52:48,779 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:52:48,779 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:52:48,780 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:52:48,780 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:52:48,780 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:52:48,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:52:48,781 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:52:48,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:52:48,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:52:48,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:52:48,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:52:48,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:52:48,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:52:48,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:52:48,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:52:48,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:52:48,784 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:52:48,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:52:48,784 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:52:48,785 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:52:48,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:52:48,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:52:48,785 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:52:48,786 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:52:49,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:52:49,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:52:49,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:52:49,045 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:52:49,045 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:52:49,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy7.wvr_bound2.c [2023-08-04 09:52:50,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:52:50,467 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:52:50,467 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy7.wvr_bound2.c [2023-08-04 09:52:50,474 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e2166162/63b1910016fa4bc2931b08ffc4107cfd/FLAG4bc30d472 [2023-08-04 09:52:50,485 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e2166162/63b1910016fa4bc2931b08ffc4107cfd [2023-08-04 09:52:50,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:52:50,488 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:52:50,489 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:52:50,489 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:52:50,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:52:50,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bdca6c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50, skipping insertion in model container [2023-08-04 09:52:50,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,512 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:52:50,634 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy7.wvr_bound2.c[2034,2047] [2023-08-04 09:52:50,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:52:50,643 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:52:50,661 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy7.wvr_bound2.c[2034,2047] [2023-08-04 09:52:50,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:52:50,674 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:52:50,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50 WrapperNode [2023-08-04 09:52:50,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:52:50,676 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:52:50,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:52:50,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:52:50,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,706 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2023-08-04 09:52:50,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:52:50,707 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:52:50,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:52:50,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:52:50,714 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,726 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,729 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:52:50,730 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:52:50,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:52:50,730 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:52:50,731 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (1/1) ... [2023-08-04 09:52:50,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:52:50,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:52:50,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:52:50,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:52:50,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:52:50,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:52:50,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:52:50,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:52:50,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:52:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:52:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:52:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:52:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:52:50,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:52:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:52:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:52:50,806 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:52:50,910 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:52:50,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:52:51,114 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:52:51,121 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:52:51,121 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 09:52:51,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:52:51 BoogieIcfgContainer [2023-08-04 09:52:51,123 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:52:51,126 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:52:51,126 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:52:51,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:52:51,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:52:50" (1/3) ... [2023-08-04 09:52:51,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44307b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:52:51, skipping insertion in model container [2023-08-04 09:52:51,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:52:50" (2/3) ... [2023-08-04 09:52:51,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44307b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:52:51, skipping insertion in model container [2023-08-04 09:52:51,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:52:51" (3/3) ... [2023-08-04 09:52:51,131 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-easy7.wvr_bound2.c [2023-08-04 09:52:51,140 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:52:51,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:52:51,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:52:51,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:52:51,214 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:52:51,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 119 transitions, 260 flow [2023-08-04 09:52:51,328 INFO L124 PetriNetUnfolderBase]: 27/263 cut-off events. [2023-08-04 09:52:51,328 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 09:52:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 263 events. 27/263 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 996 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-08-04 09:52:51,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 119 transitions, 260 flow [2023-08-04 09:52:51,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 109 transitions, 236 flow [2023-08-04 09:52:51,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:52:51,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 109 transitions, 236 flow [2023-08-04 09:52:51,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 109 transitions, 236 flow [2023-08-04 09:52:51,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 109 transitions, 236 flow [2023-08-04 09:52:51,439 INFO L124 PetriNetUnfolderBase]: 27/228 cut-off events. [2023-08-04 09:52:51,439 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:52:51,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 228 events. 27/228 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 756 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 122. Up to 8 conditions per place. [2023-08-04 09:52:51,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 2940 [2023-08-04 09:52:53,476 INFO L134 LiptonReduction]: Checked pairs total: 4457 [2023-08-04 09:52:53,476 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-04 09:52:53,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:52:53,498 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2a31e1ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:52:53,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:52:53,501 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:52:53,501 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 09:52:53,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:52:53,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:53,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:52:53,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:52:53,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash 411769279, now seen corresponding path program 1 times [2023-08-04 09:52:53,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:53,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270649234] [2023-08-04 09:52:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:52:53,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:53,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270649234] [2023-08-04 09:52:53,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270649234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:52:53,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:52:53,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:52:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979148915] [2023-08-04 09:52:53,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:52:53,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:52:53,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:52:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:52:53,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2023-08-04 09:52:53,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2023-08-04 09:52:53,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:53,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2023-08-04 09:52:53,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:52:53,885 INFO L124 PetriNetUnfolderBase]: 390/716 cut-off events. [2023-08-04 09:52:53,885 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-04 09:52:53,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1450 conditions, 716 events. 390/716 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3018 event pairs, 168 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 1256. Up to 688 conditions per place. [2023-08-04 09:52:53,891 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 29 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-08-04 09:52:53,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 150 flow [2023-08-04 09:52:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:52:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:52:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-04 09:52:53,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355450236966824 [2023-08-04 09:52:53,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-04 09:52:53,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-04 09:52:53,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:52:53,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-04 09:52:53,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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) [2023-08-04 09:52:53,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:53,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:53,917 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 76 flow. Second operand 3 states and 339 transitions. [2023-08-04 09:52:53,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 150 flow [2023-08-04 09:52:53,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:52:53,922 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 78 flow [2023-08-04 09:52:53,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-04 09:52:53,927 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-08-04 09:52:53,927 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 78 flow [2023-08-04 09:52:53,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2023-08-04 09:52:53,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:53,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:52:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:52:53,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:52:53,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 97349844, now seen corresponding path program 1 times [2023-08-04 09:52:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:53,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440351136] [2023-08-04 09:52:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:52:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440351136] [2023-08-04 09:52:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440351136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:52:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316723902] [2023-08-04 09:52:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:54,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:52:54,003 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) [2023-08-04 09:52:54,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:52:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:54,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:52:54,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:52:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:52:54,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:52:54,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316723902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:52:54,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:52:54,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:52:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786649025] [2023-08-04 09:52:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:52:54,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:52:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:52:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:52:54,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2023-08-04 09:52:54,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2023-08-04 09:52:54,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:54,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2023-08-04 09:52:54,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:52:54,225 INFO L124 PetriNetUnfolderBase]: 385/711 cut-off events. [2023-08-04 09:52:54,225 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:52:54,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1452 conditions, 711 events. 385/711 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3062 event pairs, 177 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 1410. Up to 627 conditions per place. [2023-08-04 09:52:54,231 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 33 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2023-08-04 09:52:54,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 168 flow [2023-08-04 09:52:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:52:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:52:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-04 09:52:54,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5418641390205371 [2023-08-04 09:52:54,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-04 09:52:54,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-04 09:52:54,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:52:54,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-04 09:52:54,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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) [2023-08-04 09:52:54,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:54,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:54,250 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 78 flow. Second operand 3 states and 343 transitions. [2023-08-04 09:52:54,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 168 flow [2023-08-04 09:52:54,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:52:54,252 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 82 flow [2023-08-04 09:52:54,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-04 09:52:54,253 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-04 09:52:54,253 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 82 flow [2023-08-04 09:52:54,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2023-08-04 09:52:54,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:54,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:52:54,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:52:54,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:54,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:52:54,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1885637306, now seen corresponding path program 1 times [2023-08-04 09:52:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:54,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807468517] [2023-08-04 09:52:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:54,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:52:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807468517] [2023-08-04 09:52:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807468517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:52:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007085410] [2023-08-04 09:52:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:54,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:52:54,573 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) [2023-08-04 09:52:54,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:52:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:54,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:52:54,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:52:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:52:54,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:52:54,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007085410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:52:54,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:52:54,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:52:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160985564] [2023-08-04 09:52:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:52:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:52:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:52:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:52:54,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2023-08-04 09:52:54,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2023-08-04 09:52:54,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:54,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2023-08-04 09:52:54,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:52:54,752 INFO L124 PetriNetUnfolderBase]: 247/478 cut-off events. [2023-08-04 09:52:54,752 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 09:52:54,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 478 events. 247/478 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1745 event pairs, 156 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 798. Up to 319 conditions per place. [2023-08-04 09:52:54,755 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-04 09:52:54,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 188 flow [2023-08-04 09:52:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:52:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:52:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-04 09:52:54,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466034755134281 [2023-08-04 09:52:54,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-04 09:52:54,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-04 09:52:54,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:52:54,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-04 09:52:54,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 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) [2023-08-04 09:52:54,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:54,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:54,760 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 82 flow. Second operand 3 states and 346 transitions. [2023-08-04 09:52:54,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 188 flow [2023-08-04 09:52:54,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:52:54,761 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 90 flow [2023-08-04 09:52:54,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-04 09:52:54,762 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 09:52:54,762 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 90 flow [2023-08-04 09:52:54,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2023-08-04 09:52:54,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:54,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:52:54,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 09:52:54,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:52:54,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:52:54,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash 964853265, now seen corresponding path program 1 times [2023-08-04 09:52:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:54,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954239602] [2023-08-04 09:52:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:54,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:52:55,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:55,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954239602] [2023-08-04 09:52:55,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954239602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:52:55,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609710563] [2023-08-04 09:52:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:55,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:52:55,052 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) [2023-08-04 09:52:55,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:52:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:55,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:52:55,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:52:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:52:55,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:52:55,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609710563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:52:55,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:52:55,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:52:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459332149] [2023-08-04 09:52:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:52:55,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:52:55,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:52:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:52:55,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2023-08-04 09:52:55,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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) [2023-08-04 09:52:55,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:55,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2023-08-04 09:52:55,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:52:55,240 INFO L124 PetriNetUnfolderBase]: 238/461 cut-off events. [2023-08-04 09:52:55,240 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2023-08-04 09:52:55,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 461 events. 238/461 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1608 event pairs, 221 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 797. Up to 410 conditions per place. [2023-08-04 09:52:55,242 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 33 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2023-08-04 09:52:55,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 182 flow [2023-08-04 09:52:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:52:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:52:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-04 09:52:55,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5418641390205371 [2023-08-04 09:52:55,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-04 09:52:55,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-04 09:52:55,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:52:55,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-04 09:52:55,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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) [2023-08-04 09:52:55,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:55,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-08-04 09:52:55,248 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 90 flow. Second operand 3 states and 343 transitions. [2023-08-04 09:52:55,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 182 flow [2023-08-04 09:52:55,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:52:55,250 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 92 flow [2023-08-04 09:52:55,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-04 09:52:55,251 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-04 09:52:55,251 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 92 flow [2023-08-04 09:52:55,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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) [2023-08-04 09:52:55,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:55,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:52:55,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:52:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:55,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:52:55,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1285721786, now seen corresponding path program 1 times [2023-08-04 09:52:55,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:55,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348432993] [2023-08-04 09:52:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:52:55,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:55,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348432993] [2023-08-04 09:52:55,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348432993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:52:55,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458447883] [2023-08-04 09:52:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:55,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:52:55,570 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) [2023-08-04 09:52:55,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:52:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:55,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:52:55,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:52:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:52:55,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:52:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:52:55,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458447883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:52:55,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:52:55,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:52:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561844094] [2023-08-04 09:52:55,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:52:55,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:52:55,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:55,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:52:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:52:55,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 211 [2023-08-04 09:52:55,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 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) [2023-08-04 09:52:55,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:55,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 211 [2023-08-04 09:52:55,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:52:55,736 INFO L124 PetriNetUnfolderBase]: 8/25 cut-off events. [2023-08-04 09:52:55,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:52:55,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 25 events. 8/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 5/30 useless extension candidates. Maximal degree in co-relation 56. Up to 18 conditions per place. [2023-08-04 09:52:55,737 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 09:52:55,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 56 flow [2023-08-04 09:52:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:52:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:52:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2023-08-04 09:52:55,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495260663507109 [2023-08-04 09:52:55,739 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 418 transitions. [2023-08-04 09:52:55,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 418 transitions. [2023-08-04 09:52:55,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:52:55,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 418 transitions. [2023-08-04 09:52:55,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 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) [2023-08-04 09:52:55,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-08-04 09:52:55,743 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-08-04 09:52:55,743 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 92 flow. Second operand 4 states and 418 transitions. [2023-08-04 09:52:55,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 56 flow [2023-08-04 09:52:55,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:52:55,744 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 09:52:55,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 09:52:55,746 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -12 predicate places. [2023-08-04 09:52:55,746 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 09:52:55,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 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) [2023-08-04 09:52:55,750 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:52:55,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:52:55,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:55,956 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 09:52:55,958 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:52:55,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 119 transitions, 260 flow [2023-08-04 09:52:55,984 INFO L124 PetriNetUnfolderBase]: 27/263 cut-off events. [2023-08-04 09:52:55,984 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 09:52:55,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 263 events. 27/263 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 996 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-08-04 09:52:55,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 119 transitions, 260 flow [2023-08-04 09:52:55,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 79 transitions, 168 flow [2023-08-04 09:52:55,986 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:52:55,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 79 transitions, 168 flow [2023-08-04 09:52:55,986 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 79 transitions, 168 flow [2023-08-04 09:52:55,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 79 transitions, 168 flow [2023-08-04 09:52:55,996 INFO L124 PetriNetUnfolderBase]: 3/119 cut-off events. [2023-08-04 09:52:55,996 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:52:55,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 119 events. 3/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 223 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-08-04 09:52:55,998 INFO L119 LiptonReduction]: Number of co-enabled transitions 1344 [2023-08-04 09:52:57,798 INFO L134 LiptonReduction]: Checked pairs total: 980 [2023-08-04 09:52:57,798 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 09:52:57,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:52:57,800 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2a31e1ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:52:57,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:52:57,803 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:52:57,803 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-04 09:52:57,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:52:57,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:57,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:52:57,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:52:57,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash 483341239, now seen corresponding path program 1 times [2023-08-04 09:52:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:57,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205610997] [2023-08-04 09:52:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:57,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:52:57,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:57,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205610997] [2023-08-04 09:52:57,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205610997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:52:57,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:52:57,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:52:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884861005] [2023-08-04 09:52:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:52:57,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:52:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:52:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:52:57,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 193 [2023-08-04 09:52:57,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 11 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-08-04 09:52:57,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:57,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 193 [2023-08-04 09:52:57,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:52:57,914 INFO L124 PetriNetUnfolderBase]: 9/31 cut-off events. [2023-08-04 09:52:57,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:52:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 31 events. 9/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 2 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 56. Up to 24 conditions per place. [2023-08-04 09:52:57,915 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 9 selfloop transitions, 2 changer transitions 0/13 dead transitions. [2023-08-04 09:52:57,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 58 flow [2023-08-04 09:52:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:52:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:52:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-08-04 09:52:57,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492227979274611 [2023-08-04 09:52:57,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-08-04 09:52:57,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-08-04 09:52:57,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:52:57,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-08-04 09:52:57,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2023-08-04 09:52:57,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 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) [2023-08-04 09:52:57,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 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) [2023-08-04 09:52:57,919 INFO L175 Difference]: Start difference. First operand has 16 places, 11 transitions, 32 flow. Second operand 3 states and 318 transitions. [2023-08-04 09:52:57,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 58 flow [2023-08-04 09:52:57,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 58 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:52:57,920 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 40 flow [2023-08-04 09:52:57,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-08-04 09:52:57,922 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, 3 predicate places. [2023-08-04 09:52:57,922 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 40 flow [2023-08-04 09:52:57,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-08-04 09:52:57,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:57,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:52:57,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 09:52:57,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:52:57,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2093992911, now seen corresponding path program 1 times [2023-08-04 09:52:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841551627] [2023-08-04 09:52:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:52:57,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:52:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:52:57,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:52:57,994 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:52:57,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:52:57,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:52:57,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:52:57,995 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:52:57,995 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:52:57,996 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:52:57,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:52:58,013 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:52:58,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 153 transitions, 354 flow [2023-08-04 09:52:58,086 INFO L124 PetriNetUnfolderBase]: 118/858 cut-off events. [2023-08-04 09:52:58,087 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 09:52:58,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 858 events. 118/858 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4775 event pairs, 1 based on Foata normal form. 0/737 useless extension candidates. Maximal degree in co-relation 507. Up to 32 conditions per place. [2023-08-04 09:52:58,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 153 transitions, 354 flow [2023-08-04 09:52:58,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 143 transitions, 326 flow [2023-08-04 09:52:58,094 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:52:58,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 143 transitions, 326 flow [2023-08-04 09:52:58,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 143 transitions, 326 flow [2023-08-04 09:52:58,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 143 transitions, 326 flow [2023-08-04 09:52:58,150 INFO L124 PetriNetUnfolderBase]: 118/726 cut-off events. [2023-08-04 09:52:58,150 INFO L125 PetriNetUnfolderBase]: For 68/76 co-relation queries the response was YES. [2023-08-04 09:52:58,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 726 events. 118/726 cut-off events. For 68/76 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3828 event pairs, 1 based on Foata normal form. 0/621 useless extension candidates. Maximal degree in co-relation 440. Up to 32 conditions per place. [2023-08-04 09:52:58,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 8008 [2023-08-04 09:52:59,774 INFO L134 LiptonReduction]: Checked pairs total: 31216 [2023-08-04 09:52:59,774 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-04 09:52:59,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:52:59,777 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2a31e1ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:52:59,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:52:59,778 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:52:59,778 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 09:52:59,778 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:52:59,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:59,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:52:59,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:52:59,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 748881178, now seen corresponding path program 1 times [2023-08-04 09:52:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:59,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670987387] [2023-08-04 09:52:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:52:59,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:59,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670987387] [2023-08-04 09:52:59,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670987387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:52:59,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:52:59,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:52:59,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223200353] [2023-08-04 09:52:59,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:52:59,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:52:59,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:52:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:52:59,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 247 [2023-08-04 09:52:59,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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) [2023-08-04 09:52:59,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:59,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 247 [2023-08-04 09:52:59,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:03,778 INFO L124 PetriNetUnfolderBase]: 28950/44665 cut-off events. [2023-08-04 09:53:03,778 INFO L125 PetriNetUnfolderBase]: For 3511/3511 co-relation queries the response was YES. [2023-08-04 09:53:03,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86550 conditions, 44665 events. 28950/44665 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 360398 event pairs, 23954 based on Foata normal form. 0/40815 useless extension candidates. Maximal degree in co-relation 32465. Up to 39618 conditions per place. [2023-08-04 09:53:04,111 INFO L140 encePairwiseOnDemand]: 244/247 looper letters, 45 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-04 09:53:04,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 268 flow [2023-08-04 09:53:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-04 09:53:04,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5910931174089069 [2023-08-04 09:53:04,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-04 09:53:04,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-04 09:53:04,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:04,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-04 09:53:04,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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) [2023-08-04 09:53:04,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:04,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:04,116 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 162 flow. Second operand 3 states and 438 transitions. [2023-08-04 09:53:04,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 268 flow [2023-08-04 09:53:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:53:04,152 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 168 flow [2023-08-04 09:53:04,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-08-04 09:53:04,154 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2023-08-04 09:53:04,154 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 168 flow [2023-08-04 09:53:04,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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) [2023-08-04 09:53:04,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:04,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:53:04,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:04,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1064631486, now seen corresponding path program 1 times [2023-08-04 09:53:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609748483] [2023-08-04 09:53:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:53:04,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609748483] [2023-08-04 09:53:04,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609748483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117672147] [2023-08-04 09:53:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:04,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:04,213 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) [2023-08-04 09:53:04,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:53:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:04,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:04,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:53:04,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117672147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:04,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:04,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:53:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780769371] [2023-08-04 09:53:04,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:04,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:04,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 247 [2023-08-04 09:53:04,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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) [2023-08-04 09:53:04,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:04,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 247 [2023-08-04 09:53:04,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:07,071 INFO L124 PetriNetUnfolderBase]: 28920/44590 cut-off events. [2023-08-04 09:53:07,071 INFO L125 PetriNetUnfolderBase]: For 2351/2351 co-relation queries the response was YES. [2023-08-04 09:53:07,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86358 conditions, 44590 events. 28920/44590 cut-off events. For 2351/2351 co-relation queries the response was YES. Maximal size of possible extension queue 1594. Compared 357863 event pairs, 25454 based on Foata normal form. 0/40745 useless extension candidates. Maximal degree in co-relation 70520. Up to 39077 conditions per place. [2023-08-04 09:53:07,375 INFO L140 encePairwiseOnDemand]: 244/247 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 09:53:07,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 308 flow [2023-08-04 09:53:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-04 09:53:07,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601889338731444 [2023-08-04 09:53:07,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-04 09:53:07,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-04 09:53:07,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:07,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-04 09:53:07,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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) [2023-08-04 09:53:07,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:07,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:07,385 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 168 flow. Second operand 3 states and 446 transitions. [2023-08-04 09:53:07,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 308 flow [2023-08-04 09:53:07,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:53:07,388 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 178 flow [2023-08-04 09:53:07,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2023-08-04 09:53:07,389 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-08-04 09:53:07,390 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 178 flow [2023-08-04 09:53:07,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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) [2023-08-04 09:53:07,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:07,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:07,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:07,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:07,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:07,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1019529640, now seen corresponding path program 1 times [2023-08-04 09:53:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:07,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334456503] [2023-08-04 09:53:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:53:07,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334456503] [2023-08-04 09:53:07,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334456503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034953894] [2023-08-04 09:53:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:07,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:07,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:07,633 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) [2023-08-04 09:53:07,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:53:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:07,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:07,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:53:07,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:07,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034953894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:07,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:53:07,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471270641] [2023-08-04 09:53:07,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:07,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:07,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:07,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:07,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 247 [2023-08-04 09:53:07,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 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) [2023-08-04 09:53:07,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:07,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 247 [2023-08-04 09:53:07,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:09,650 INFO L124 PetriNetUnfolderBase]: 22593/34338 cut-off events. [2023-08-04 09:53:09,651 INFO L125 PetriNetUnfolderBase]: For 2855/2855 co-relation queries the response was YES. [2023-08-04 09:53:09,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69725 conditions, 34338 events. 22593/34338 cut-off events. For 2855/2855 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 263600 event pairs, 15188 based on Foata normal form. 0/32540 useless extension candidates. Maximal degree in co-relation 41846. Up to 22430 conditions per place. [2023-08-04 09:53:09,833 INFO L140 encePairwiseOnDemand]: 244/247 looper letters, 63 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 09:53:09,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 362 flow [2023-08-04 09:53:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 09:53:09,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126855600539811 [2023-08-04 09:53:09,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 09:53:09,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 09:53:09,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:09,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 09:53:09,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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) [2023-08-04 09:53:09,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:09,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:09,846 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 178 flow. Second operand 3 states and 454 transitions. [2023-08-04 09:53:09,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 362 flow [2023-08-04 09:53:09,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:53:09,855 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 188 flow [2023-08-04 09:53:09,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-08-04 09:53:09,856 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2023-08-04 09:53:09,856 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 188 flow [2023-08-04 09:53:09,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 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) [2023-08-04 09:53:09,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:09,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:09,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:10,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:10,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:10,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -657643361, now seen corresponding path program 1 times [2023-08-04 09:53:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:10,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245836069] [2023-08-04 09:53:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:53:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245836069] [2023-08-04 09:53:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245836069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384245586] [2023-08-04 09:53:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:10,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:10,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:10,125 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) [2023-08-04 09:53:10,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:53:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:10,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:10,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:53:10,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:10,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384245586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:10,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:10,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:53:10,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463957807] [2023-08-04 09:53:10,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:10,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:10,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:10,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:10,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 247 [2023-08-04 09:53:10,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2023-08-04 09:53:10,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:10,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 247 [2023-08-04 09:53:10,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:12,298 INFO L124 PetriNetUnfolderBase]: 21814/34074 cut-off events. [2023-08-04 09:53:12,298 INFO L125 PetriNetUnfolderBase]: For 7896/7896 co-relation queries the response was YES. [2023-08-04 09:53:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71472 conditions, 34074 events. 21814/34074 cut-off events. For 7896/7896 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 267464 event pairs, 18207 based on Foata normal form. 0/33682 useless extension candidates. Maximal degree in co-relation 42578. Up to 25788 conditions per place. [2023-08-04 09:53:12,495 INFO L140 encePairwiseOnDemand]: 244/247 looper letters, 64 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-04 09:53:12,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 374 flow [2023-08-04 09:53:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 09:53:12,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126855600539811 [2023-08-04 09:53:12,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 09:53:12,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 09:53:12,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:12,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 09:53:12,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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) [2023-08-04 09:53:12,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:12,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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) [2023-08-04 09:53:12,503 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 188 flow. Second operand 3 states and 454 transitions. [2023-08-04 09:53:12,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 374 flow [2023-08-04 09:53:12,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:53:12,592 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 198 flow [2023-08-04 09:53:12,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-08-04 09:53:12,594 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2023-08-04 09:53:12,594 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 198 flow [2023-08-04 09:53:12,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2023-08-04 09:53:12,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:12,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:12,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:12,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:12,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:12,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1560066176, now seen corresponding path program 1 times [2023-08-04 09:53:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:12,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487122625] [2023-08-04 09:53:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:12,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:53:12,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:12,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487122625] [2023-08-04 09:53:12,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487122625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:12,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677821477] [2023-08-04 09:53:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:12,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:12,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:12,859 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) [2023-08-04 09:53:12,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:53:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:12,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:53:12,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:53:12,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:53:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:53:12,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677821477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:53:12,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:53:12,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:53:12,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923330945] [2023-08-04 09:53:12,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:53:12,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:53:12,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:53:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:12,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 247 [2023-08-04 09:53:12,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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) [2023-08-04 09:53:12,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:12,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 247 [2023-08-04 09:53:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:15,087 INFO L124 PetriNetUnfolderBase]: 20053/31029 cut-off events. [2023-08-04 09:53:15,088 INFO L125 PetriNetUnfolderBase]: For 5583/5583 co-relation queries the response was YES. [2023-08-04 09:53:15,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65752 conditions, 31029 events. 20053/31029 cut-off events. For 5583/5583 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 237441 event pairs, 14480 based on Foata normal form. 5/30833 useless extension candidates. Maximal degree in co-relation 50733. Up to 27946 conditions per place. [2023-08-04 09:53:15,255 INFO L140 encePairwiseOnDemand]: 243/247 looper letters, 55 selfloop transitions, 3 changer transitions 1/79 dead transitions. [2023-08-04 09:53:15,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 344 flow [2023-08-04 09:53:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:53:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:53:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 573 transitions. [2023-08-04 09:53:15,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799595141700404 [2023-08-04 09:53:15,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 573 transitions. [2023-08-04 09:53:15,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 573 transitions. [2023-08-04 09:53:15,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:15,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 573 transitions. [2023-08-04 09:53:15,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 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) [2023-08-04 09:53:15,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:15,266 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 198 flow. Second operand 4 states and 573 transitions. [2023-08-04 09:53:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 344 flow [2023-08-04 09:53:15,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:53:15,553 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 210 flow [2023-08-04 09:53:15,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2023-08-04 09:53:15,554 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2023-08-04 09:53:15,554 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 210 flow [2023-08-04 09:53:15,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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) [2023-08-04 09:53:15,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:15,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:15,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:15,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 09:53:15,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:15,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2136614139, now seen corresponding path program 1 times [2023-08-04 09:53:15,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:15,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341223358] [2023-08-04 09:53:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:53:15,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341223358] [2023-08-04 09:53:15,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341223358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48897875] [2023-08-04 09:53:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:15,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:15,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:15,833 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) [2023-08-04 09:53:15,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:53:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:15,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:53:15,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:53:15,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:53:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:53:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48897875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:53:15,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:53:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:53:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625697834] [2023-08-04 09:53:15,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:53:15,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:53:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:53:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:15,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 247 [2023-08-04 09:53:15,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 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) [2023-08-04 09:53:15,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:15,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 247 [2023-08-04 09:53:15,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:17,762 INFO L124 PetriNetUnfolderBase]: 19218/28918 cut-off events. [2023-08-04 09:53:17,762 INFO L125 PetriNetUnfolderBase]: For 3968/3968 co-relation queries the response was YES. [2023-08-04 09:53:17,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61974 conditions, 28918 events. 19218/28918 cut-off events. For 3968/3968 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 212064 event pairs, 8767 based on Foata normal form. 125/29011 useless extension candidates. Maximal degree in co-relation 47125. Up to 20841 conditions per place. [2023-08-04 09:53:17,929 INFO L140 encePairwiseOnDemand]: 243/247 looper letters, 71 selfloop transitions, 3 changer transitions 1/95 dead transitions. [2023-08-04 09:53:17,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 420 flow [2023-08-04 09:53:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:53:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:53:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 589 transitions. [2023-08-04 09:53:17,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2023-08-04 09:53:17,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 589 transitions. [2023-08-04 09:53:17,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 589 transitions. [2023-08-04 09:53:17,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:17,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 589 transitions. [2023-08-04 09:53:17,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 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) [2023-08-04 09:53:17,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:17,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:17,936 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 210 flow. Second operand 4 states and 589 transitions. [2023-08-04 09:53:17,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 420 flow [2023-08-04 09:53:18,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 411 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:53:18,143 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 215 flow [2023-08-04 09:53:18,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-04 09:53:18,144 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 13 predicate places. [2023-08-04 09:53:18,144 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 215 flow [2023-08-04 09:53:18,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 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) [2023-08-04 09:53:18,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:18,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:18,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:18,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:53:18,353 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:18,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1726399838, now seen corresponding path program 1 times [2023-08-04 09:53:18,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:18,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78693260] [2023-08-04 09:53:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:18,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:53:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78693260] [2023-08-04 09:53:18,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78693260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746112634] [2023-08-04 09:53:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:18,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:18,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:18,415 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) [2023-08-04 09:53:18,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:53:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:18,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:53:18,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:53:18,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:53:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:53:18,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746112634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:53:18,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:53:18,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:53:18,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517361576] [2023-08-04 09:53:18,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:53:18,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:53:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:53:18,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:18,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 247 [2023-08-04 09:53:18,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 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) [2023-08-04 09:53:18,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:18,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 247 [2023-08-04 09:53:18,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:20,101 INFO L124 PetriNetUnfolderBase]: 13632/20817 cut-off events. [2023-08-04 09:53:20,101 INFO L125 PetriNetUnfolderBase]: For 9251/9251 co-relation queries the response was YES. [2023-08-04 09:53:20,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46278 conditions, 20817 events. 13632/20817 cut-off events. For 9251/9251 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 148213 event pairs, 5303 based on Foata normal form. 500/21049 useless extension candidates. Maximal degree in co-relation 43708. Up to 7668 conditions per place. [2023-08-04 09:53:20,197 INFO L140 encePairwiseOnDemand]: 243/247 looper letters, 79 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2023-08-04 09:53:20,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 466 flow [2023-08-04 09:53:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:53:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:53:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 597 transitions. [2023-08-04 09:53:20,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604251012145749 [2023-08-04 09:53:20,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 597 transitions. [2023-08-04 09:53:20,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 597 transitions. [2023-08-04 09:53:20,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:20,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 597 transitions. [2023-08-04 09:53:20,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 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) [2023-08-04 09:53:20,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:20,203 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:20,203 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 215 flow. Second operand 4 states and 597 transitions. [2023-08-04 09:53:20,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 466 flow [2023-08-04 09:53:20,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 456 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:53:20,270 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 226 flow [2023-08-04 09:53:20,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2023-08-04 09:53:20,271 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 15 predicate places. [2023-08-04 09:53:20,271 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 226 flow [2023-08-04 09:53:20,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 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) [2023-08-04 09:53:20,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:20,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:20,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:20,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:53:20,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:20,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash -358743069, now seen corresponding path program 1 times [2023-08-04 09:53:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873796478] [2023-08-04 09:53:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:53:20,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:20,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873796478] [2023-08-04 09:53:20,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873796478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:20,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575947047] [2023-08-04 09:53:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:20,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:20,572 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) [2023-08-04 09:53:20,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:53:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:20,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:53:20,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:53:20,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:53:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:53:20,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575947047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:53:20,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:53:20,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:53:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876915344] [2023-08-04 09:53:20,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:53:20,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:53:20,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:53:20,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:20,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 247 [2023-08-04 09:53:20,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 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) [2023-08-04 09:53:20,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:20,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 247 [2023-08-04 09:53:20,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:22,003 INFO L124 PetriNetUnfolderBase]: 13616/21252 cut-off events. [2023-08-04 09:53:22,003 INFO L125 PetriNetUnfolderBase]: For 13056/13056 co-relation queries the response was YES. [2023-08-04 09:53:22,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48880 conditions, 21252 events. 13616/21252 cut-off events. For 13056/13056 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 155121 event pairs, 13009 based on Foata normal form. 21/21020 useless extension candidates. Maximal degree in co-relation 46246. Up to 18017 conditions per place. [2023-08-04 09:53:22,110 INFO L140 encePairwiseOnDemand]: 243/247 looper letters, 79 selfloop transitions, 3 changer transitions 2/104 dead transitions. [2023-08-04 09:53:22,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 478 flow [2023-08-04 09:53:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:53:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:53:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 597 transitions. [2023-08-04 09:53:22,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604251012145749 [2023-08-04 09:53:22,112 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 597 transitions. [2023-08-04 09:53:22,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 597 transitions. [2023-08-04 09:53:22,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:22,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 597 transitions. [2023-08-04 09:53:22,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 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) [2023-08-04 09:53:22,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:22,115 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 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) [2023-08-04 09:53:22,116 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 226 flow. Second operand 4 states and 597 transitions. [2023-08-04 09:53:22,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 478 flow [2023-08-04 09:53:22,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 474 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:53:22,230 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 230 flow [2023-08-04 09:53:22,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-08-04 09:53:22,231 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-08-04 09:53:22,231 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 230 flow [2023-08-04 09:53:22,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 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) [2023-08-04 09:53:22,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:22,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:22,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:22,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:53:22,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:22,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1346011390, now seen corresponding path program 1 times [2023-08-04 09:53:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026290617] [2023-08-04 09:53:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:53:22,700 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:53:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:53:22,797 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:53:22,797 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:53:22,797 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:53:22,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 09:53:22,798 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:22,798 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2023-08-04 09:53:22,801 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 09:53:22,801 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 09:53:22,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:53:22 BasicIcfg [2023-08-04 09:53:22,880 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 09:53:22,880 INFO L158 Benchmark]: Toolchain (without parser) took 32392.28ms. Allocated memory was 583.0MB in the beginning and 12.3GB in the end (delta: 11.7GB). Free memory was 534.1MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-08-04 09:53:22,883 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 354.4MB. Free memory was 303.2MB in the beginning and 303.1MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 09:53:22,883 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.95ms. Allocated memory is still 583.0MB. Free memory was 534.1MB in the beginning and 523.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 09:53:22,883 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.73ms. Allocated memory is still 583.0MB. Free memory was 523.2MB in the beginning and 521.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:53:22,884 INFO L158 Benchmark]: Boogie Preprocessor took 22.59ms. Allocated memory is still 583.0MB. Free memory was 521.5MB in the beginning and 520.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:53:22,884 INFO L158 Benchmark]: RCFGBuilder took 393.61ms. Allocated memory is still 583.0MB. Free memory was 520.1MB in the beginning and 506.3MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 09:53:22,884 INFO L158 Benchmark]: TraceAbstraction took 31754.30ms. Allocated memory was 583.0MB in the beginning and 12.3GB in the end (delta: 11.7GB). Free memory was 505.7MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-08-04 09:53:22,886 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 354.4MB. Free memory was 303.2MB in the beginning and 303.1MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 185.95ms. Allocated memory is still 583.0MB. Free memory was 534.1MB in the beginning and 523.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.73ms. Allocated memory is still 583.0MB. Free memory was 523.2MB in the beginning and 521.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.59ms. Allocated memory is still 583.0MB. Free memory was 521.5MB in the beginning and 520.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 393.61ms. Allocated memory is still 583.0MB. Free memory was 520.1MB in the beginning and 506.3MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 31754.30ms. Allocated memory was 583.0MB in the beginning and 12.3GB in the end (delta: 11.7GB). Free memory was 505.7MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 104 PlacesBefore, 30 PlacesAfterwards, 109 TransitionsBefore, 29 TransitionsAfterwards, 2940 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 92 TotalNumberOfCompositions, 4457 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3396, independent: 3313, independent conditional: 0, independent unconditional: 3313, dependent: 83, dependent conditional: 0, dependent unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1568, independent: 1545, independent conditional: 0, independent unconditional: 1545, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3396, independent: 1768, independent conditional: 0, independent unconditional: 1768, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 1568, unknown conditional: 0, unknown unconditional: 1568] , Statistics on independence cache: Total cache size (in pairs): 98, Positive cache size: 90, Positive conditional cache size: 0, Positive unconditional cache size: 90, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 82 PlacesBefore, 16 PlacesAfterwards, 79 TransitionsBefore, 11 TransitionsAfterwards, 1344 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 5 ConcurrentYvCompositions, 2 ChoiceCompositions, 74 TotalNumberOfCompositions, 980 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 980, independent: 980, independent conditional: 0, independent unconditional: 980, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 695, independent: 695, independent conditional: 0, independent unconditional: 695, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 980, independent: 285, independent conditional: 0, independent unconditional: 285, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 695, unknown conditional: 0, unknown unconditional: 695] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 138 PlacesBefore, 62 PlacesAfterwards, 143 TransitionsBefore, 61 TransitionsAfterwards, 8008 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 94 TotalNumberOfCompositions, 31216 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14625, independent: 14222, independent conditional: 0, independent unconditional: 14222, dependent: 403, dependent conditional: 0, dependent unconditional: 403, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3957, independent: 3904, independent conditional: 0, independent unconditional: 3904, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 14625, independent: 10318, independent conditional: 0, independent unconditional: 10318, dependent: 350, dependent conditional: 0, dependent unconditional: 350, unknown: 3957, unknown conditional: 0, unknown unconditional: 3957] , Statistics on independence cache: Total cache size (in pairs): 676, Positive cache size: 647, Positive conditional cache size: 0, Positive unconditional cache size: 647, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] 0 unsigned int x1, x2; [L59] 0 pthread_t t1[2], t2[2]; [L61] 0 x1 = __VERIFIER_nondet_uint() [L62] 0 x2 = __VERIFIER_nondet_uint() [L63] CALL 0 assume_abort_if_not(x1 == x2) [L35] COND FALSE 0 !(!cond) [L63] RET 0 assume_abort_if_not(x1 == x2) [L66] 0 int asdf=0; VAL [asdf=0, t1={5:0}, t2={3:0}, x1=4294967290, x2=4294967290] [L66] COND TRUE 0 asdf<2 [L66] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [asdf=0, pthread_create(&t1[asdf], 0, thread1, 0)=-4, t1={5:0}, t2={3:0}, x1=4294967290, x2=4294967290] [L41] 1 x2++ [L42] 1 x2++ VAL [x1=4294967290, x2++=4294967291, x2=4294967291] [L66] 0 asdf++ VAL [asdf=1, t1={5:0}, t2={3:0}, x1=4294967290, x2++=4294967291, x2=4294967291] [L66] COND TRUE 0 asdf<2 [L66] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [asdf=1, pthread_create(&t1[asdf], 0, thread1, 0)=-3, t1={5:0}, t2={3:0}, x1=4294967290, x2++=4294967291, x2=4294967291] [L41] 2 x2++ [L42] 2 x2++ [L43] 2 x2++ VAL [x1=4294967290, x2++=4294967291, x2++=4294967293, x2=4294967293] [L42] 1 x2++ VAL [x1=4294967290, x2++=4294967293, x2=4294967292] [L43] 1 x2++ [L44] 1 x2++ VAL [x1=4294967290, x2++=4294967293, x2++=4294967293, x2=4294967293] [L66] 0 asdf++ VAL [asdf=2, t1={5:0}, t2={3:0}, x1=4294967290, x2++=4294967293, x2++=4294967293, x2=4294967293] [L66] COND FALSE 0 !(asdf<2) [L67] 0 int asdf=0; VAL [asdf=0, asdf=2, t1={5:0}, t2={3:0}, x1=4294967290, x2++=4294967293, x2++=4294967293, x2=4294967293] [L67] COND TRUE 0 asdf<2 [L44] 1 x2++ [L46] 1 return 0; [L67] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [\result={0:0}, asdf=0, asdf=2, pthread_create(&t2[asdf], 0, thread2, 0)=-2, t1={5:0}, t2={3:0}, x1=4294967290, x2++=4294967293, x2=4294967294] [L50] 3 x1++ VAL [\result={0:0}, x1=4294967291, x2++=4294967293, x2=4294967294] [L51] 3 x1++ [L52] 3 x1++ VAL [\result={0:0}, x1++=4294967292, x1=4294967292, x2++=4294967293, x2=4294967294] [L43] 2 x2++ VAL [\result={0:0}, x1++=4294967292, x1=4294967292, x2=4294967294] [L44] 2 x2++ [L46] 2 return 0; [L67] 0 asdf++ VAL [\result={0:0}, asdf=1, asdf=2, t1={5:0}, t2={3:0}, x1++=4294967292, x1=4294967292, x2=4294967295] [L67] COND TRUE 0 asdf<2 [L67] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [\result={0:0}, asdf=1, asdf=2, pthread_create(&t2[asdf], 0, thread2, 0)=-1, t1={5:0}, t2={3:0}, x1++=4294967292, x1=4294967292, x2=4294967295] [L50] 4 x1++ [L51] 4 x1++ VAL [\result={0:0}, x1++=4294967292, x1++=4294967293, x1=4294967293, x2=4294967295] [L67] 0 asdf++ VAL [\result={0:0}, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1++=4294967292, x1++=4294967293, x1=4294967293, x2=4294967295] [L52] 3 x1++ VAL [\result={0:0}, x1++=4294967293, x1=4294967293, x2=4294967295] [L53] 3 x1++ [L55] 3 return 0; [L67] COND FALSE 0 !(asdf<2) [L68] 0 int asdf=0; VAL [\result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1++=4294967293, x1=4294967294, x2=4294967295] [L68] COND TRUE 0 asdf<2 [L68] 0 t1[asdf] VAL [\result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, t1={5:0}, t1[asdf]=-4, t2={3:0}, x1++=4294967293, x1=4294967294, x2=4294967295] [L51] 4 x1++ VAL [\result={0:0}, \result={0:0}, x1=4294967294, x2=4294967295] [L52] 4 x1++ [L53] 4 x1++ [L55] 4 return 0; [L68] FCALL, JOIN 1 pthread_join(t1[asdf], 0) VAL [\result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, t1={5:0}, t1[asdf]=-4, t2={3:0}, x1=4294967296, x2=4294967295] [L68] 0 asdf++ VAL [\result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1=4294967296, x2=4294967295] [L68] COND TRUE 0 asdf<2 [L68] 0 t1[asdf] VAL [\result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, t1={5:0}, t1[asdf]=-3, t2={3:0}, x1=4294967296, x2=4294967295] [L68] FCALL, JOIN 2 pthread_join(t1[asdf], 0) VAL [\result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, t1={5:0}, t1[asdf]=-3, t2={3:0}, x1=4294967296, x2=4294967295] [L68] 0 asdf++ VAL [\result={0:0}, \result={0:0}, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1=4294967296, x2=4294967295] [L68] COND FALSE 0 !(asdf<2) [L69] 0 int asdf=0; VAL [\result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1=4294967296, x2=4294967295] [L69] COND TRUE 0 asdf<2 [L69] 0 t2[asdf] VAL [\result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=-2, x1=4294967296, x2=4294967295] [L69] FCALL, JOIN 3 pthread_join(t2[asdf], 0) VAL [\result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=-2, x1=4294967296, x2=4294967295] [L69] 0 asdf++ VAL [\result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1=4294967296, x2=4294967295] [L69] COND TRUE 0 asdf<2 [L69] 0 t2[asdf] VAL [\result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=-1, x1=4294967296, x2=4294967295] [L69] FCALL, JOIN 4 pthread_join(t2[asdf], 0) VAL [\result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=-1, x1=4294967296, x2=4294967295] [L69] 0 asdf++ VAL [\result={0:0}, \result={0:0}, asdf=2, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1=4294967296, x2=4294967295] [L69] COND FALSE 0 !(asdf<2) [L71] CALL 0 assume_abort_if_not(x1 != x2) [L35] COND FALSE 0 !(!cond) [L71] RET 0 assume_abort_if_not(x1 != x2) [L72] 0 reach_error() VAL [\result={0:0}, \result={0:0}, asdf=2, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x1=4294967296, x2=4294967295] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 140 locations, 3 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: 4.7s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 123 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 293 IncrementalHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 9 mSDtfsCounter, 293 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=4, InterpolantAutomatonStates: 16, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 427 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/24 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 170 locations, 3 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: 24.8s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 20.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 332 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 257 mSDsluCounter, 18 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1021 IncrementalHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 18 mSDtfsCounter, 1021 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 421 GetRequests, 391 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=8, InterpolantAutomatonStates: 28, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 528 NumberOfCodeBlocks, 528 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 620 ConstructedInterpolants, 0 QuantifiedInterpolants, 838 SizeOfPredicates, 0 NumberOfNonLiveVariables, 987 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 132/147 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 140 locations, 3 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: 2.0s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27 IncrementalHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 27 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=1, InterpolantAutomatonStates: 3, 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-04 09:53:22,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...