/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_chl-node-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:25:47,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:25:47,910 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:25:47,917 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:25:47,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:25:47,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:25:47,918 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:25:47,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:25:47,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:25:47,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:25:47,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:25:47,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:25:47,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:25:47,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:25:47,954 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:25:47,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:25:47,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:25:47,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:25:47,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:25:47,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:25:47,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:25:47,956 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:25:47,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:25:47,956 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:25:47,957 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:25:47,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:25:47,958 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:25:47,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:25:47,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:25:47,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:25:47,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:25:47,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:25:47,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:25:47,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:25:47,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:25:47,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:25:47,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:25:47,960 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:25:47,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:25:47,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:25:47,961 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:25:47,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:25:48,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:25:48,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:25:48,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:25:48,203 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:25:48,204 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:25:48,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-subst.wvr_bound2.c [2023-08-04 08:25:49,360 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:25:49,582 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:25:49,582 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-subst.wvr_bound2.c [2023-08-04 08:25:49,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1550da5ae/febf9a63de3c4d2d887a636f4a044f30/FLAGc60482d98 [2023-08-04 08:25:49,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1550da5ae/febf9a63de3c4d2d887a636f4a044f30 [2023-08-04 08:25:49,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:25:49,604 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:25:49,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:25:49,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:25:49,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:25:49,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,609 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6597b447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49, skipping insertion in model container [2023-08-04 08:25:49,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,631 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:25:49,782 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_chl-node-subst.wvr_bound2.c[4239,4252] [2023-08-04 08:25:49,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:25:49,798 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:25:49,824 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_chl-node-subst.wvr_bound2.c[4239,4252] [2023-08-04 08:25:49,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:25:49,844 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:25:49,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49 WrapperNode [2023-08-04 08:25:49,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:25:49,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:25:49,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:25:49,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:25:49,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,860 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,892 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 479 [2023-08-04 08:25:49,892 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:25:49,893 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:25:49,893 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:25:49,893 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:25:49,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,910 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,949 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:25:49,959 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:25:49,959 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:25:49,959 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:25:49,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (1/1) ... [2023-08-04 08:25:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:25:49,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:49,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:25:49,988 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 08:25:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:25:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:25:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:25:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:25:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:25:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:25:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:25:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:25:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:25:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:25:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:25:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:25:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:25:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:25:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:25:50,020 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 08:25:50,122 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:25:50,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:25:50,638 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:25:50,648 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:25:50,648 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:25:50,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:25:50 BoogieIcfgContainer [2023-08-04 08:25:50,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:25:50,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:25:50,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:25:50,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:25:50,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:25:49" (1/3) ... [2023-08-04 08:25:50,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b13a9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:25:50, skipping insertion in model container [2023-08-04 08:25:50,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:49" (2/3) ... [2023-08-04 08:25:50,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b13a9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:25:50, skipping insertion in model container [2023-08-04 08:25:50,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:25:50" (3/3) ... [2023-08-04 08:25:50,658 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-node-subst.wvr_bound2.c [2023-08-04 08:25:50,666 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:25:50,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:25:50,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:25:50,690 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:25:50,784 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:25:50,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:25:51,198 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:25:51,199 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:25:51,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:25:51,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:25:51,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 549 transitions, 1140 flow [2023-08-04 08:25:51,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:25:51,254 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:25:51,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:25:51,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:25:51,533 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:25:51,533 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:25:51,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:25:51,587 INFO L119 LiptonReduction]: Number of co-enabled transitions 36000 [2023-08-04 08:26:07,877 INFO L134 LiptonReduction]: Checked pairs total: 57272 [2023-08-04 08:26:07,877 INFO L136 LiptonReduction]: Total number of compositions: 594 [2023-08-04 08:26:07,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:26:07,894 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;@6a4811c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:26:07,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:26:07,901 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:26:07,901 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2023-08-04 08:26:07,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:26:07,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:07,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:07,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:07,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:07,906 INFO L85 PathProgramCache]: Analyzing trace with hash -603425281, now seen corresponding path program 1 times [2023-08-04 08:26:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:07,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909779668] [2023-08-04 08:26:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:07,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:08,231 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 08:26:08,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:08,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909779668] [2023-08-04 08:26:08,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909779668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:08,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:08,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:08,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937245473] [2023-08-04 08:26:08,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:08,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:08,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:08,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:08,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:26:08,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 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 08:26:08,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:08,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:26:08,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:11,073 INFO L124 PetriNetUnfolderBase]: 23172/31744 cut-off events. [2023-08-04 08:26:11,074 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2023-08-04 08:26:11,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63742 conditions, 31744 events. 23172/31744 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 169003 event pairs, 11228 based on Foata normal form. 0/23684 useless extension candidates. Maximal degree in co-relation 57866. Up to 31027 conditions per place. [2023-08-04 08:26:11,260 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 77 selfloop transitions, 2 changer transitions 4/86 dead transitions. [2023-08-04 08:26:11,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 374 flow [2023-08-04 08:26:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1573 transitions. [2023-08-04 08:26:11,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45873432487605714 [2023-08-04 08:26:11,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1573 transitions. [2023-08-04 08:26:11,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1573 transitions. [2023-08-04 08:26:11,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:11,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1573 transitions. [2023-08-04 08:26:11,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 524.3333333333334) internal successors, (1573), 3 states have internal predecessors, (1573), 0 states have call successors, (0), 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 08:26:11,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:11,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:11,386 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 196 flow. Second operand 3 states and 1573 transitions. [2023-08-04 08:26:11,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 374 flow [2023-08-04 08:26:11,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:26:11,402 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 190 flow [2023-08-04 08:26:11,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 08:26:11,406 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:26:11,406 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 190 flow [2023-08-04 08:26:11,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 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 08:26:11,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:11,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:11,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:26:11,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:11,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 704342914, now seen corresponding path program 1 times [2023-08-04 08:26:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:11,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617405752] [2023-08-04 08:26:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:11,583 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 08:26:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617405752] [2023-08-04 08:26:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617405752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823105153] [2023-08-04 08:26:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:11,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:11,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:11,589 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 08:26:11,627 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 08:26:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:11,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:11,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:11,746 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 08:26:11,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:11,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823105153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:11,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:11,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790636592] [2023-08-04 08:26:11,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:11,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:26:11,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 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 08:26:11,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:11,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:26:11,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:13,983 INFO L124 PetriNetUnfolderBase]: 22706/30998 cut-off events. [2023-08-04 08:26:13,984 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2023-08-04 08:26:14,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62269 conditions, 30998 events. 22706/30998 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 164703 event pairs, 11139 based on Foata normal form. 0/23119 useless extension candidates. Maximal degree in co-relation 62179. Up to 30179 conditions per place. [2023-08-04 08:26:14,122 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 86 selfloop transitions, 2 changer transitions 1/92 dead transitions. [2023-08-04 08:26:14,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 92 transitions, 406 flow [2023-08-04 08:26:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1581 transitions. [2023-08-04 08:26:14,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46106736657917763 [2023-08-04 08:26:14,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1581 transitions. [2023-08-04 08:26:14,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1581 transitions. [2023-08-04 08:26:14,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:14,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1581 transitions. [2023-08-04 08:26:14,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 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 08:26:14,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:14,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:14,146 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 190 flow. Second operand 3 states and 1581 transitions. [2023-08-04 08:26:14,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 92 transitions, 406 flow [2023-08-04 08:26:14,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 92 transitions, 390 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:26:14,157 INFO L231 Difference]: Finished difference. Result has 60 places, 73 transitions, 182 flow [2023-08-04 08:26:14,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=73} [2023-08-04 08:26:14,159 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-04 08:26:14,159 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 73 transitions, 182 flow [2023-08-04 08:26:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 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 08:26:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:14,161 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 08:26:14,171 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 08:26:14,366 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 08:26:14,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:14,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1396575272, now seen corresponding path program 1 times [2023-08-04 08:26:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440359061] [2023-08-04 08:26:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:14,475 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 08:26:14,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:14,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440359061] [2023-08-04 08:26:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440359061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:14,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083228752] [2023-08-04 08:26:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:14,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:14,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:14,481 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 08:26:14,508 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 08:26:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:14,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:14,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:14,627 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 08:26:14,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:14,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083228752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:14,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:14,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590973734] [2023-08-04 08:26:14,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:14,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:14,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:26:14,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 73 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 503.3333333333333) internal successors, (1510), 3 states have internal predecessors, (1510), 0 states have call successors, (0), 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 08:26:14,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:14,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:26:14,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:16,546 INFO L124 PetriNetUnfolderBase]: 22642/30951 cut-off events. [2023-08-04 08:26:16,546 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-08-04 08:26:16,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62277 conditions, 30951 events. 22642/30951 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 165452 event pairs, 10778 based on Foata normal form. 0/23217 useless extension candidates. Maximal degree in co-relation 55290. Up to 28093 conditions per place. [2023-08-04 08:26:16,665 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 95 selfloop transitions, 2 changer transitions 1/101 dead transitions. [2023-08-04 08:26:16,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 434 flow [2023-08-04 08:26:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1590 transitions. [2023-08-04 08:26:16,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636920384951881 [2023-08-04 08:26:16,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1590 transitions. [2023-08-04 08:26:16,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1590 transitions. [2023-08-04 08:26:16,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:16,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1590 transitions. [2023-08-04 08:26:16,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 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 08:26:16,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:16,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:16,681 INFO L175 Difference]: Start difference. First operand has 60 places, 73 transitions, 182 flow. Second operand 3 states and 1590 transitions. [2023-08-04 08:26:16,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 434 flow [2023-08-04 08:26:16,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:16,687 INFO L231 Difference]: Finished difference. Result has 61 places, 73 transitions, 186 flow [2023-08-04 08:26:16,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=73} [2023-08-04 08:26:16,688 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-04 08:26:16,688 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 73 transitions, 186 flow [2023-08-04 08:26:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.3333333333333) internal successors, (1510), 3 states have internal predecessors, (1510), 0 states have call successors, (0), 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 08:26:16,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:16,689 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] [2023-08-04 08:26:16,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:16,895 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 08:26:16,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:16,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash 237583025, now seen corresponding path program 1 times [2023-08-04 08:26:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854713956] [2023-08-04 08:26:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:16,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:16,991 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 08:26:16,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854713956] [2023-08-04 08:26:16,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854713956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432275340] [2023-08-04 08:26:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:16,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:16,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:17,001 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 08:26:17,004 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 08:26:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:17,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:17,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:17,136 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 08:26:17,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:17,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432275340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:17,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:17,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:17,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405089923] [2023-08-04 08:26:17,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:17,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:17,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:17,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:26:17,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 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 08:26:17,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:17,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:26:17,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:18,156 INFO L124 PetriNetUnfolderBase]: 12754/17735 cut-off events. [2023-08-04 08:26:18,156 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2023-08-04 08:26:18,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37374 conditions, 17735 events. 12754/17735 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 87410 event pairs, 6679 based on Foata normal form. 0/14161 useless extension candidates. Maximal degree in co-relation 33250. Up to 12365 conditions per place. [2023-08-04 08:26:18,208 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 100 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-04 08:26:18,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 105 transitions, 460 flow [2023-08-04 08:26:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1594 transitions. [2023-08-04 08:26:18,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648585593467483 [2023-08-04 08:26:18,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1594 transitions. [2023-08-04 08:26:18,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1594 transitions. [2023-08-04 08:26:18,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:18,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1594 transitions. [2023-08-04 08:26:18,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 531.3333333333334) internal successors, (1594), 3 states have internal predecessors, (1594), 0 states have call successors, (0), 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 08:26:18,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:18,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:18,227 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 186 flow. Second operand 3 states and 1594 transitions. [2023-08-04 08:26:18,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 105 transitions, 460 flow [2023-08-04 08:26:18,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:18,230 INFO L231 Difference]: Finished difference. Result has 62 places, 74 transitions, 194 flow [2023-08-04 08:26:18,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=62, PETRI_TRANSITIONS=74} [2023-08-04 08:26:18,231 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-04 08:26:18,232 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 74 transitions, 194 flow [2023-08-04 08:26:18,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 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 08:26:18,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:18,233 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] [2023-08-04 08:26:18,243 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 08:26:18,438 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 08:26:18,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:18,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash 873971047, now seen corresponding path program 1 times [2023-08-04 08:26:18,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:18,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679435612] [2023-08-04 08:26:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:18,524 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 08:26:18,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:18,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679435612] [2023-08-04 08:26:18,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679435612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:18,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959414368] [2023-08-04 08:26:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:18,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:18,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:18,529 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 08:26:18,550 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 08:26:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:18,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:18,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:26:18,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:18,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959414368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:18,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:18,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:18,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566471360] [2023-08-04 08:26:18,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:18,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1143 [2023-08-04 08:26:18,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 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 08:26:18,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:18,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1143 [2023-08-04 08:26:18,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:20,099 INFO L124 PetriNetUnfolderBase]: 14107/19553 cut-off events. [2023-08-04 08:26:20,100 INFO L125 PetriNetUnfolderBase]: For 3714/3714 co-relation queries the response was YES. [2023-08-04 08:26:20,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41902 conditions, 19553 events. 14107/19553 cut-off events. For 3714/3714 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 98924 event pairs, 7434 based on Foata normal form. 0/15960 useless extension candidates. Maximal degree in co-relation 37721. Up to 13254 conditions per place. [2023-08-04 08:26:20,175 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 113 selfloop transitions, 3 changer transitions 1/120 dead transitions. [2023-08-04 08:26:20,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 120 transitions, 557 flow [2023-08-04 08:26:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1598 transitions. [2023-08-04 08:26:20,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46602508019830857 [2023-08-04 08:26:20,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1598 transitions. [2023-08-04 08:26:20,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1598 transitions. [2023-08-04 08:26:20,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:20,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1598 transitions. [2023-08-04 08:26:20,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 532.6666666666666) internal successors, (1598), 3 states have internal predecessors, (1598), 0 states have call successors, (0), 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 08:26:20,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:20,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:20,194 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 194 flow. Second operand 3 states and 1598 transitions. [2023-08-04 08:26:20,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 120 transitions, 557 flow [2023-08-04 08:26:20,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:20,227 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 210 flow [2023-08-04 08:26:20,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2023-08-04 08:26:20,228 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:26:20,228 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 210 flow [2023-08-04 08:26:20,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 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 08:26:20,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:20,229 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] [2023-08-04 08:26:20,234 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 08:26:20,434 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 08:26:20,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:20,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1810198061, now seen corresponding path program 1 times [2023-08-04 08:26:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993455494] [2023-08-04 08:26:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:20,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:20,527 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 08:26:20,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993455494] [2023-08-04 08:26:20,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993455494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358206209] [2023-08-04 08:26:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:20,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:20,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:20,533 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 08:26:20,537 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 08:26:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:20,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:20,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:26:20,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358206209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:20,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:20,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237352212] [2023-08-04 08:26:20,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:20,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:20,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1143 [2023-08-04 08:26:20,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 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 08:26:20,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:20,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1143 [2023-08-04 08:26:20,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:21,973 INFO L124 PetriNetUnfolderBase]: 15598/21612 cut-off events. [2023-08-04 08:26:21,974 INFO L125 PetriNetUnfolderBase]: For 8463/8463 co-relation queries the response was YES. [2023-08-04 08:26:22,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50546 conditions, 21612 events. 15598/21612 cut-off events. For 8463/8463 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 109876 event pairs, 8325 based on Foata normal form. 0/18883 useless extension candidates. Maximal degree in co-relation 45936. Up to 14690 conditions per place. [2023-08-04 08:26:22,066 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 111 selfloop transitions, 3 changer transitions 1/118 dead transitions. [2023-08-04 08:26:22,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 118 transitions, 571 flow [2023-08-04 08:26:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1594 transitions. [2023-08-04 08:26:22,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648585593467483 [2023-08-04 08:26:22,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1594 transitions. [2023-08-04 08:26:22,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1594 transitions. [2023-08-04 08:26:22,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:22,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1594 transitions. [2023-08-04 08:26:22,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 531.3333333333334) internal successors, (1594), 3 states have internal predecessors, (1594), 0 states have call successors, (0), 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 08:26:22,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:22,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:22,081 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 210 flow. Second operand 3 states and 1594 transitions. [2023-08-04 08:26:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 118 transitions, 571 flow [2023-08-04 08:26:22,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 118 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:22,112 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 222 flow [2023-08-04 08:26:22,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-08-04 08:26:22,113 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-04 08:26:22,113 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 222 flow [2023-08-04 08:26:22,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 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 08:26:22,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:22,114 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] [2023-08-04 08:26:22,120 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 08:26:22,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:22,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:22,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash -772128979, now seen corresponding path program 1 times [2023-08-04 08:26:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834512083] [2023-08-04 08:26:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:22,391 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 08:26:22,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834512083] [2023-08-04 08:26:22,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834512083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:22,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673940492] [2023-08-04 08:26:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:22,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:22,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:22,393 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 08:26:22,395 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 08:26:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:22,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:22,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:26:22,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:22,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673940492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:22,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:22,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:22,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714479585] [2023-08-04 08:26:22,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:22,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:22,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:22,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:22,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:22,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1143 [2023-08-04 08:26:22,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 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 08:26:22,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:22,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1143 [2023-08-04 08:26:22,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:24,033 INFO L124 PetriNetUnfolderBase]: 17141/23732 cut-off events. [2023-08-04 08:26:24,033 INFO L125 PetriNetUnfolderBase]: For 11128/11128 co-relation queries the response was YES. [2023-08-04 08:26:24,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58503 conditions, 23732 events. 17141/23732 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 119562 event pairs, 9496 based on Foata normal form. 0/21458 useless extension candidates. Maximal degree in co-relation 53006. Up to 16604 conditions per place. [2023-08-04 08:26:24,135 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 109 selfloop transitions, 3 changer transitions 1/116 dead transitions. [2023-08-04 08:26:24,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 116 transitions, 577 flow [2023-08-04 08:26:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1590 transitions. [2023-08-04 08:26:24,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636920384951881 [2023-08-04 08:26:24,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1590 transitions. [2023-08-04 08:26:24,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1590 transitions. [2023-08-04 08:26:24,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:24,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1590 transitions. [2023-08-04 08:26:24,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 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 08:26:24,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:24,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:24,149 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 222 flow. Second operand 3 states and 1590 transitions. [2023-08-04 08:26:24,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 116 transitions, 577 flow [2023-08-04 08:26:24,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 565 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:24,227 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 234 flow [2023-08-04 08:26:24,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-08-04 08:26:24,228 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-04 08:26:24,228 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 234 flow [2023-08-04 08:26:24,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 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 08:26:24,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:24,230 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] [2023-08-04 08:26:24,236 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 08:26:24,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:24,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:24,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash -349259001, now seen corresponding path program 1 times [2023-08-04 08:26:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:24,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079506665] [2023-08-04 08:26:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:24,499 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 08:26:24,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:24,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079506665] [2023-08-04 08:26:24,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079506665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:24,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970508038] [2023-08-04 08:26:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:24,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:24,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:24,501 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 08:26:24,525 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 08:26:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:24,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:24,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:26:24,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970508038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885893249] [2023-08-04 08:26:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:24,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:26:24,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 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 08:26:24,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:24,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:26:24,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:26,110 INFO L124 PetriNetUnfolderBase]: 15472/21401 cut-off events. [2023-08-04 08:26:26,111 INFO L125 PetriNetUnfolderBase]: For 9357/9357 co-relation queries the response was YES. [2023-08-04 08:26:26,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55460 conditions, 21401 events. 15472/21401 cut-off events. For 9357/9357 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 105398 event pairs, 11269 based on Foata normal form. 0/20233 useless extension candidates. Maximal degree in co-relation 50089. Up to 19332 conditions per place. [2023-08-04 08:26:26,207 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 107 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-04 08:26:26,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 564 flow [2023-08-04 08:26:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1594 transitions. [2023-08-04 08:26:26,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648585593467483 [2023-08-04 08:26:26,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1594 transitions. [2023-08-04 08:26:26,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1594 transitions. [2023-08-04 08:26:26,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:26,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1594 transitions. [2023-08-04 08:26:26,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 531.3333333333334) internal successors, (1594), 3 states have internal predecessors, (1594), 0 states have call successors, (0), 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 08:26:26,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:26,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:26,220 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 234 flow. Second operand 3 states and 1594 transitions. [2023-08-04 08:26:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 564 flow [2023-08-04 08:26:26,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 552 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:26,496 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 240 flow [2023-08-04 08:26:26,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-08-04 08:26:26,497 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 08:26:26,497 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 240 flow [2023-08-04 08:26:26,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 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 08:26:26,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:26,498 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, 1, 1, 1] [2023-08-04 08:26:26,506 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 08:26:26,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:26,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:26,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash -667864771, now seen corresponding path program 1 times [2023-08-04 08:26:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:26,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12127385] [2023-08-04 08:26:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:26:26,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:26,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12127385] [2023-08-04 08:26:26,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12127385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:26,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096902268] [2023-08-04 08:26:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:26,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:26,816 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 08:26:26,828 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 08:26:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:26,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:26,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:26:26,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:26,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096902268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:26,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:26,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:26:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427459765] [2023-08-04 08:26:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:26,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:26,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:26,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:26:26,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 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 08:26:26,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:26,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:26:26,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:28,258 INFO L124 PetriNetUnfolderBase]: 15441/21345 cut-off events. [2023-08-04 08:26:28,258 INFO L125 PetriNetUnfolderBase]: For 7561/7561 co-relation queries the response was YES. [2023-08-04 08:26:28,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54172 conditions, 21345 events. 15441/21345 cut-off events. For 7561/7561 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 105039 event pairs, 12134 based on Foata normal form. 0/19729 useless extension candidates. Maximal degree in co-relation 48932. Up to 20926 conditions per place. [2023-08-04 08:26:28,335 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 101 selfloop transitions, 2 changer transitions 3/109 dead transitions. [2023-08-04 08:26:28,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 109 transitions, 544 flow [2023-08-04 08:26:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1590 transitions. [2023-08-04 08:26:28,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636920384951881 [2023-08-04 08:26:28,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1590 transitions. [2023-08-04 08:26:28,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1590 transitions. [2023-08-04 08:26:28,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:28,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1590 transitions. [2023-08-04 08:26:28,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 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 08:26:28,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:28,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:28,347 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 240 flow. Second operand 3 states and 1590 transitions. [2023-08-04 08:26:28,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 109 transitions, 544 flow [2023-08-04 08:26:28,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 109 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:28,499 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 238 flow [2023-08-04 08:26:28,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-04 08:26:28,500 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 08:26:28,500 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 238 flow [2023-08-04 08:26:28,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 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 08:26:28,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:28,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:28,506 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 08:26:28,702 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,SelfDestructingSolverStorable8 [2023-08-04 08:26:28,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:28,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:28,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1136138250, now seen corresponding path program 1 times [2023-08-04 08:26:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777320943] [2023-08-04 08:26:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:28,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:26:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777320943] [2023-08-04 08:26:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777320943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862632020] [2023-08-04 08:26:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:28,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:28,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:28,821 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 08:26:28,832 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 08:26:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:28,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:26:28,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:26:29,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:29,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862632020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:29,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:29,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:26:29,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745495740] [2023-08-04 08:26:29,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:29,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:29,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:29,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:29,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1143 [2023-08-04 08:26:29,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 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 08:26:29,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:29,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1143 [2023-08-04 08:26:29,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:30,207 INFO L124 PetriNetUnfolderBase]: 15316/21101 cut-off events. [2023-08-04 08:26:30,208 INFO L125 PetriNetUnfolderBase]: For 7240/7240 co-relation queries the response was YES. [2023-08-04 08:26:30,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53536 conditions, 21101 events. 15316/21101 cut-off events. For 7240/7240 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19498 useless extension candidates. Maximal degree in co-relation 53190. Up to 20802 conditions per place. [2023-08-04 08:26:30,303 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 72 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 08:26:30,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 388 flow [2023-08-04 08:26:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1539 transitions. [2023-08-04 08:26:30,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44881889763779526 [2023-08-04 08:26:30,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1539 transitions. [2023-08-04 08:26:30,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1539 transitions. [2023-08-04 08:26:30,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:30,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1539 transitions. [2023-08-04 08:26:30,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.0) internal successors, (1539), 3 states have internal predecessors, (1539), 0 states have call successors, (0), 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 08:26:30,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:30,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 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 08:26:30,315 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 238 flow. Second operand 3 states and 1539 transitions. [2023-08-04 08:26:30,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 388 flow [2023-08-04 08:26:30,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:30,461 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 246 flow [2023-08-04 08:26:30,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-08-04 08:26:30,462 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-08-04 08:26:30,462 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 246 flow [2023-08-04 08:26:30,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 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 08:26:30,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:30,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:30,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 08:26:30,667 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,SelfDestructingSolverStorable9 [2023-08-04 08:26:30,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:30,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1997861025, now seen corresponding path program 1 times [2023-08-04 08:26:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:30,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423895035] [2023-08-04 08:26:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:26:30,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:30,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423895035] [2023-08-04 08:26:30,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423895035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:30,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692489923] [2023-08-04 08:26:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:30,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:30,748 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 08:26:30,776 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 08:26:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:30,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:26:30,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:26:30,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:30,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692489923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:30,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:30,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:26:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184155625] [2023-08-04 08:26:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:30,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:30,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:26:30,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 498.75) internal successors, (1995), 4 states have internal predecessors, (1995), 0 states have call successors, (0), 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 08:26:30,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:30,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:26:30,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:32,097 INFO L124 PetriNetUnfolderBase]: 15316/21102 cut-off events. [2023-08-04 08:26:32,098 INFO L125 PetriNetUnfolderBase]: For 7212/7212 co-relation queries the response was YES. [2023-08-04 08:26:32,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53516 conditions, 21102 events. 15316/21102 cut-off events. For 7212/7212 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19499 useless extension candidates. Maximal degree in co-relation 53493. Up to 20801 conditions per place. [2023-08-04 08:26:32,198 INFO L140 encePairwiseOnDemand]: 1138/1143 looper letters, 71 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-04 08:26:32,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 398 flow [2023-08-04 08:26:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2023-08-04 08:26:32,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420384951881015 [2023-08-04 08:26:32,202 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2023-08-04 08:26:32,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2023-08-04 08:26:32,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:32,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2023-08-04 08:26:32,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.25) internal successors, (2021), 4 states have internal predecessors, (2021), 0 states have call successors, (0), 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 08:26:32,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:32,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:32,212 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 246 flow. Second operand 4 states and 2021 transitions. [2023-08-04 08:26:32,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 398 flow [2023-08-04 08:26:32,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:32,355 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 260 flow [2023-08-04 08:26:32,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2023-08-04 08:26:32,355 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-08-04 08:26:32,355 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 260 flow [2023-08-04 08:26:32,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 498.75) internal successors, (1995), 4 states have internal predecessors, (1995), 0 states have call successors, (0), 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 08:26:32,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:32,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:32,370 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 08:26:32,562 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,SelfDestructingSolverStorable10 [2023-08-04 08:26:32,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:32,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1509021745, now seen corresponding path program 1 times [2023-08-04 08:26:32,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:32,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397561647] [2023-08-04 08:26:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:26:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397561647] [2023-08-04 08:26:32,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397561647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199900679] [2023-08-04 08:26:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:32,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:32,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:32,648 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 08:26:32,651 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 08:26:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:32,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:26:32,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:26:32,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:32,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199900679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:32,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:32,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:26:32,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393219807] [2023-08-04 08:26:32,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:32,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:32,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:32,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:32,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:32,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:26:32,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 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 08:26:32,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:32,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:26:32,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:34,135 INFO L124 PetriNetUnfolderBase]: 15316/21103 cut-off events. [2023-08-04 08:26:34,136 INFO L125 PetriNetUnfolderBase]: For 7212/7212 co-relation queries the response was YES. [2023-08-04 08:26:34,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53525 conditions, 21103 events. 15316/21103 cut-off events. For 7212/7212 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19501 useless extension candidates. Maximal degree in co-relation 53493. Up to 20802 conditions per place. [2023-08-04 08:26:34,210 INFO L140 encePairwiseOnDemand]: 1138/1143 looper letters, 72 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-08-04 08:26:34,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 414 flow [2023-08-04 08:26:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2023-08-04 08:26:34,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420384951881015 [2023-08-04 08:26:34,214 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2023-08-04 08:26:34,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2023-08-04 08:26:34,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:34,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2023-08-04 08:26:34,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.25) internal successors, (2021), 4 states have internal predecessors, (2021), 0 states have call successors, (0), 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 08:26:34,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:34,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:34,222 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 260 flow. Second operand 4 states and 2021 transitions. [2023-08-04 08:26:34,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 414 flow [2023-08-04 08:26:34,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:34,363 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 277 flow [2023-08-04 08:26:34,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-08-04 08:26:34,364 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2023-08-04 08:26:34,364 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 277 flow [2023-08-04 08:26:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 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 08:26:34,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:34,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:34,369 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 08:26:34,565 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,SelfDestructingSolverStorable11 [2023-08-04 08:26:34,565 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:34,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:34,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1710784652, now seen corresponding path program 1 times [2023-08-04 08:26:34,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:34,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367098127] [2023-08-04 08:26:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:34,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:34,659 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 08:26:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:34,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367098127] [2023-08-04 08:26:34,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367098127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:34,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749181913] [2023-08-04 08:26:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:34,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:34,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:34,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:34,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:26:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:34,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:26:34,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:26:34,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:34,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749181913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:34,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:34,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:26:34,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752945457] [2023-08-04 08:26:34,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:34,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:34,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:34,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:26:34,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 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 08:26:34,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:34,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:26:34,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:36,155 INFO L124 PetriNetUnfolderBase]: 15316/21104 cut-off events. [2023-08-04 08:26:36,155 INFO L125 PetriNetUnfolderBase]: For 7213/7213 co-relation queries the response was YES. [2023-08-04 08:26:36,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53536 conditions, 21104 events. 15316/21104 cut-off events. For 7213/7213 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19503 useless extension candidates. Maximal degree in co-relation 53500. Up to 20804 conditions per place. [2023-08-04 08:26:36,246 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 74 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-04 08:26:36,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 433 flow [2023-08-04 08:26:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:26:36,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:26:36,253 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:26:36,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:26:36,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:36,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:26:36,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 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 08:26:36,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:36,261 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:36,262 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 277 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:26:36,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 433 flow [2023-08-04 08:26:36,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:36,432 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 287 flow [2023-08-04 08:26:36,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2023-08-04 08:26:36,432 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2023-08-04 08:26:36,432 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 287 flow [2023-08-04 08:26:36,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 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 08:26:36,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:36,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:36,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:36,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:26:36,639 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:36,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1275390492, now seen corresponding path program 1 times [2023-08-04 08:26:36,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:36,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093811662] [2023-08-04 08:26:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:36,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:26:36,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:36,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093811662] [2023-08-04 08:26:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093811662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402231826] [2023-08-04 08:26:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:36,748 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:36,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:26:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:36,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:26:36,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:26:36,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:36,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402231826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:36,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:36,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:26:36,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208459027] [2023-08-04 08:26:36,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:36,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:36,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:37,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:26:37,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 287 flow. Second operand has 4 states, 4 states have (on average 499.5) internal successors, (1998), 4 states have internal predecessors, (1998), 0 states have call successors, (0), 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 08:26:37,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:37,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:26:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:38,221 INFO L124 PetriNetUnfolderBase]: 15316/21105 cut-off events. [2023-08-04 08:26:38,221 INFO L125 PetriNetUnfolderBase]: For 7213/7213 co-relation queries the response was YES. [2023-08-04 08:26:38,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53543 conditions, 21105 events. 15316/21105 cut-off events. For 7213/7213 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19505 useless extension candidates. Maximal degree in co-relation 53506. Up to 20805 conditions per place. [2023-08-04 08:26:38,341 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 75 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-04 08:26:38,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 445 flow [2023-08-04 08:26:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:26:38,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:26:38,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:26:38,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:26:38,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:38,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:26:38,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 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 08:26:38,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:38,350 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:38,350 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 287 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:26:38,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 445 flow [2023-08-04 08:26:38,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 439 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:38,477 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 295 flow [2023-08-04 08:26:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2023-08-04 08:26:38,478 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2023-08-04 08:26:38,478 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 295 flow [2023-08-04 08:26:38,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.5) internal successors, (1998), 4 states have internal predecessors, (1998), 0 states have call successors, (0), 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 08:26:38,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:38,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:38,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:26:38,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:26:38,679 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:38,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash -181932577, now seen corresponding path program 1 times [2023-08-04 08:26:38,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:38,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469888122] [2023-08-04 08:26:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:38,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:26:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469888122] [2023-08-04 08:26:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469888122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177871156] [2023-08-04 08:26:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:38,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:38,904 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:38,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:26:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:39,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:26:39,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:26:39,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177871156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:39,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:39,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:26:39,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747087191] [2023-08-04 08:26:39,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:39,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:39,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:26:39,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 499.75) internal successors, (1999), 4 states have internal predecessors, (1999), 0 states have call successors, (0), 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 08:26:39,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:39,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:26:39,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:40,765 INFO L124 PetriNetUnfolderBase]: 15316/21106 cut-off events. [2023-08-04 08:26:40,765 INFO L125 PetriNetUnfolderBase]: For 7215/7215 co-relation queries the response was YES. [2023-08-04 08:26:40,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53549 conditions, 21106 events. 15316/21106 cut-off events. For 7215/7215 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 1/19508 useless extension candidates. Maximal degree in co-relation 53511. Up to 20806 conditions per place. [2023-08-04 08:26:40,834 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 76 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-04 08:26:40,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 455 flow [2023-08-04 08:26:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:26:40,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:26:40,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:26:40,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:26:40,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:40,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:26:40,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 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 08:26:40,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:40,846 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:40,846 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 295 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:26:40,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 455 flow [2023-08-04 08:26:40,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 449 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:40,955 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 303 flow [2023-08-04 08:26:40,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-08-04 08:26:40,956 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2023-08-04 08:26:40,956 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 303 flow [2023-08-04 08:26:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.75) internal successors, (1999), 4 states have internal predecessors, (1999), 0 states have call successors, (0), 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 08:26:40,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:40,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:40,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:41,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:41,157 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:41,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 617528814, now seen corresponding path program 1 times [2023-08-04 08:26:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:41,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185955894] [2023-08-04 08:26:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:41,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:26:41,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:41,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185955894] [2023-08-04 08:26:41,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185955894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086116205] [2023-08-04 08:26:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:41,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:41,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:41,254 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:41,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:26:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:41,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:26:41,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:26:41,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:26:41,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086116205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:41,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:41,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:26:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350028439] [2023-08-04 08:26:41,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:41,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:41,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:41,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1143 [2023-08-04 08:26:41,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 507.2) internal successors, (2536), 5 states have internal predecessors, (2536), 0 states have call successors, (0), 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 08:26:41,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:41,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1143 [2023-08-04 08:26:41,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:41,530 INFO L124 PetriNetUnfolderBase]: 28/69 cut-off events. [2023-08-04 08:26:41,530 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:26:41,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 69 events. 28/69 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 0 based on Foata normal form. 9/75 useless extension candidates. Maximal degree in co-relation 192. Up to 38 conditions per place. [2023-08-04 08:26:41,530 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 08:26:41,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 253 flow [2023-08-04 08:26:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:26:41,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:26:41,533 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:26:41,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:26:41,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:41,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:26:41,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 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 08:26:41,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:41,539 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 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 08:26:41,539 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 303 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:26:41,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 253 flow [2023-08-04 08:26:41,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 245 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:26:41,540 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-04 08:26:41,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-04 08:26:41,541 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -17 predicate places. [2023-08-04 08:26:41,541 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-04 08:26:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 507.2) internal successors, (2536), 5 states have internal predecessors, (2536), 0 states have call successors, (0), 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 08:26:41,543 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:26:41,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:41,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:26:41,744 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:41,745 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:26:41,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:41,906 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:26:41,907 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:26:41,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:26:41,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:41,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:41,922 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:26:41,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:41,922 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:41,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:42,079 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:26:42,079 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:26:42,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:26:42,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 36000 [2023-08-04 08:26:55,906 INFO L134 LiptonReduction]: Checked pairs total: 55933 [2023-08-04 08:26:55,906 INFO L136 LiptonReduction]: Total number of compositions: 592 [2023-08-04 08:26:55,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:26:55,909 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;@6a4811c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:26:55,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:26:55,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:26:55,914 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2023-08-04 08:26:55,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:26:55,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:55,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:55,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:55,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1871504899, now seen corresponding path program 1 times [2023-08-04 08:26:55,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:55,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168439350] [2023-08-04 08:26:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:55,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:55,994 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 08:26:55,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:55,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168439350] [2023-08-04 08:26:55,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168439350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:55,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:55,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:26:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475877828] [2023-08-04 08:26:55,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:55,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:55,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:56,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1141 [2023-08-04 08:26:56,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 492.3333333333333) internal successors, (1477), 3 states have internal predecessors, (1477), 0 states have call successors, (0), 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 08:26:56,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:56,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1141 [2023-08-04 08:26:56,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:57,433 INFO L124 PetriNetUnfolderBase]: 23687/32501 cut-off events. [2023-08-04 08:26:57,433 INFO L125 PetriNetUnfolderBase]: For 1448/1448 co-relation queries the response was YES. [2023-08-04 08:26:57,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65267 conditions, 32501 events. 23687/32501 cut-off events. For 1448/1448 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 173176 event pairs, 17710 based on Foata normal form. 0/24247 useless extension candidates. Maximal degree in co-relation 57806. Up to 31814 conditions per place. [2023-08-04 08:26:57,524 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 50 selfloop transitions, 2 changer transitions 22/77 dead transitions. [2023-08-04 08:26:57,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 338 flow [2023-08-04 08:26:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1540 transitions. [2023-08-04 08:26:57,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498977505112474 [2023-08-04 08:26:57,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1540 transitions. [2023-08-04 08:26:57,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1540 transitions. [2023-08-04 08:26:57,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:57,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1540 transitions. [2023-08-04 08:26:57,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.3333333333334) internal successors, (1540), 3 states have internal predecessors, (1540), 0 states have call successors, (0), 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 08:26:57,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1141.0) internal successors, (4564), 4 states have internal predecessors, (4564), 0 states have call successors, (0), 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 08:26:57,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1141.0) internal successors, (4564), 4 states have internal predecessors, (4564), 0 states have call successors, (0), 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 08:26:57,532 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 196 flow. Second operand 3 states and 1540 transitions. [2023-08-04 08:26:57,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 338 flow [2023-08-04 08:26:57,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:26:57,538 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 135 flow [2023-08-04 08:26:57,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-04 08:26:57,539 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:26:57,539 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 135 flow [2023-08-04 08:26:57,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 492.3333333333333) internal successors, (1477), 3 states have internal predecessors, (1477), 0 states have call successors, (0), 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 08:26:57,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:57,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:57,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 08:26:57,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:57,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2034924626, now seen corresponding path program 1 times [2023-08-04 08:26:57,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:57,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893977404] [2023-08-04 08:26:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:57,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:57,611 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 08:26:57,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:57,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893977404] [2023-08-04 08:26:57,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893977404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:57,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:57,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:57,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242289930] [2023-08-04 08:26:57,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:57,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:57,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:26:57,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:26:57,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 489.75) internal successors, (1959), 4 states have internal predecessors, (1959), 0 states have call successors, (0), 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 08:26:57,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:57,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:26:57,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:58,114 INFO L124 PetriNetUnfolderBase]: 6272/8682 cut-off events. [2023-08-04 08:26:58,114 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-08-04 08:26:58,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17558 conditions, 8682 events. 6272/8682 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 38561 event pairs, 4732 based on Foata normal form. 0/7052 useless extension candidates. Maximal degree in co-relation 17544. Up to 8644 conditions per place. [2023-08-04 08:26:58,139 INFO L140 encePairwiseOnDemand]: 1136/1141 looper letters, 49 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-04 08:26:58,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 243 flow [2023-08-04 08:26:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2002 transitions. [2023-08-04 08:26:58,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386503067484663 [2023-08-04 08:26:58,142 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2002 transitions. [2023-08-04 08:26:58,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2002 transitions. [2023-08-04 08:26:58,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:58,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2002 transitions. [2023-08-04 08:26:58,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.5) internal successors, (2002), 4 states have internal predecessors, (2002), 0 states have call successors, (0), 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 08:26:58,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:26:58,149 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:26:58,149 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 135 flow. Second operand 4 states and 2002 transitions. [2023-08-04 08:26:58,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 243 flow [2023-08-04 08:26:58,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 239 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:58,150 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 149 flow [2023-08-04 08:26:58,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-04 08:26:58,151 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-08-04 08:26:58,151 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 149 flow [2023-08-04 08:26:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 489.75) internal successors, (1959), 4 states have internal predecessors, (1959), 0 states have call successors, (0), 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 08:26:58,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:58,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 08:26:58,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:58,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -503765740, now seen corresponding path program 1 times [2023-08-04 08:26:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:58,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675015515] [2023-08-04 08:26:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:26:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675015515] [2023-08-04 08:26:58,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675015515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:58,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696932389] [2023-08-04 08:26:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:58,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:26:58,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:26:58,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 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 08:26:58,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:58,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:26:58,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:58,732 INFO L124 PetriNetUnfolderBase]: 6272/8700 cut-off events. [2023-08-04 08:26:58,732 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-04 08:26:58,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17601 conditions, 8700 events. 6272/8700 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 38751 event pairs, 4732 based on Foata normal form. 0/7071 useless extension candidates. Maximal degree in co-relation 17578. Up to 8645 conditions per place. [2023-08-04 08:26:58,759 INFO L140 encePairwiseOnDemand]: 1136/1141 looper letters, 50 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-04 08:26:58,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 259 flow [2023-08-04 08:26:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2002 transitions. [2023-08-04 08:26:58,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386503067484663 [2023-08-04 08:26:58,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2002 transitions. [2023-08-04 08:26:58,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2002 transitions. [2023-08-04 08:26:58,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:58,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2002 transitions. [2023-08-04 08:26:58,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.5) internal successors, (2002), 4 states have internal predecessors, (2002), 0 states have call successors, (0), 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 08:26:58,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:26:58,770 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:26:58,770 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 149 flow. Second operand 4 states and 2002 transitions. [2023-08-04 08:26:58,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 259 flow [2023-08-04 08:26:58,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:58,771 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 166 flow [2023-08-04 08:26:58,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-04 08:26:58,771 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-08-04 08:26:58,772 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 166 flow [2023-08-04 08:26:58,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 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 08:26:58,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:58,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:58,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 08:26:58,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:58,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:58,772 INFO L85 PathProgramCache]: Analyzing trace with hash -316655413, now seen corresponding path program 1 times [2023-08-04 08:26:58,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:58,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178663203] [2023-08-04 08:26:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:58,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:26:58,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178663203] [2023-08-04 08:26:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178663203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:58,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:58,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049331153] [2023-08-04 08:26:58,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:58,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:26:58,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:26:58,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 490.25) internal successors, (1961), 4 states have internal predecessors, (1961), 0 states have call successors, (0), 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 08:26:58,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:58,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:26:58,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:59,470 INFO L124 PetriNetUnfolderBase]: 6272/8701 cut-off events. [2023-08-04 08:26:59,470 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-04 08:26:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17612 conditions, 8701 events. 6272/8701 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 38777 event pairs, 4732 based on Foata normal form. 0/7073 useless extension candidates. Maximal degree in co-relation 17585. Up to 8647 conditions per place. [2023-08-04 08:26:59,498 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 52 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-04 08:26:59,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 58 transitions, 278 flow [2023-08-04 08:26:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 08:26:59,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843120070113933 [2023-08-04 08:26:59,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 08:26:59,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 08:26:59,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:59,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 08:26:59,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 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 08:26:59,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:26:59,506 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:26:59,506 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 166 flow. Second operand 4 states and 2001 transitions. [2023-08-04 08:26:59,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 58 transitions, 278 flow [2023-08-04 08:26:59,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:59,508 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 176 flow [2023-08-04 08:26:59,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-08-04 08:26:59,509 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-04 08:26:59,509 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 176 flow [2023-08-04 08:26:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.25) internal successors, (1961), 4 states have internal predecessors, (1961), 0 states have call successors, (0), 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 08:26:59,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:59,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:59,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 08:26:59,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:59,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash 258191701, now seen corresponding path program 1 times [2023-08-04 08:26:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:59,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328840610] [2023-08-04 08:26:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:26:59,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328840610] [2023-08-04 08:26:59,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328840610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:59,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:59,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:59,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734015008] [2023-08-04 08:26:59,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:59,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:59,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:26:59,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:26:59,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 490.5) internal successors, (1962), 4 states have internal predecessors, (1962), 0 states have call successors, (0), 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 08:26:59,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:59,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:26:59,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:00,162 INFO L124 PetriNetUnfolderBase]: 6272/8702 cut-off events. [2023-08-04 08:27:00,163 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-04 08:27:00,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17619 conditions, 8702 events. 6272/8702 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 38809 event pairs, 4732 based on Foata normal form. 0/7075 useless extension candidates. Maximal degree in co-relation 17591. Up to 8648 conditions per place. [2023-08-04 08:27:00,184 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 53 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 08:27:00,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 290 flow [2023-08-04 08:27:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 08:27:00,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843120070113933 [2023-08-04 08:27:00,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 08:27:00,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 08:27:00,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:00,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 08:27:00,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 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 08:27:00,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:27:00,192 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:27:00,192 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 176 flow. Second operand 4 states and 2001 transitions. [2023-08-04 08:27:00,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 290 flow [2023-08-04 08:27:00,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 284 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:00,193 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 184 flow [2023-08-04 08:27:00,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-08-04 08:27:00,193 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-04 08:27:00,193 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 184 flow [2023-08-04 08:27:00,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.5) internal successors, (1962), 4 states have internal predecessors, (1962), 0 states have call successors, (0), 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 08:27:00,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:00,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 08:27:00,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:27:00,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1069168844, now seen corresponding path program 1 times [2023-08-04 08:27:00,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:00,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623916903] [2023-08-04 08:27:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:27:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623916903] [2023-08-04 08:27:00,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623916903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:00,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:00,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:00,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085007539] [2023-08-04 08:27:00,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:00,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:00,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:27:00,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:27:00,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 490.75) internal successors, (1963), 4 states have internal predecessors, (1963), 0 states have call successors, (0), 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 08:27:00,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:00,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:27:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:00,873 INFO L124 PetriNetUnfolderBase]: 6272/8703 cut-off events. [2023-08-04 08:27:00,873 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-04 08:27:00,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17625 conditions, 8703 events. 6272/8703 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 38809 event pairs, 4732 based on Foata normal form. 0/7077 useless extension candidates. Maximal degree in co-relation 17596. Up to 8649 conditions per place. [2023-08-04 08:27:00,902 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 54 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 08:27:00,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 300 flow [2023-08-04 08:27:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 08:27:00,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843120070113933 [2023-08-04 08:27:00,905 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 08:27:00,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 08:27:00,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:00,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 08:27:00,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 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 08:27:00,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:27:00,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 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 08:27:00,910 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 184 flow. Second operand 4 states and 2001 transitions. [2023-08-04 08:27:00,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 300 flow [2023-08-04 08:27:00,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 294 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:00,912 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 192 flow [2023-08-04 08:27:00,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2023-08-04 08:27:00,912 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-04 08:27:00,913 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 192 flow [2023-08-04 08:27:00,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.75) internal successors, (1963), 4 states have internal predecessors, (1963), 0 states have call successors, (0), 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 08:27:00,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:00,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:00,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 08:27:00,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:27:00,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:00,914 INFO L85 PathProgramCache]: Analyzing trace with hash -941918183, now seen corresponding path program 1 times [2023-08-04 08:27:00,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:00,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404524259] [2023-08-04 08:27:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:00,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:27:00,984 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:27:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:27:01,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:27:01,078 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:27:01,078 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:27:01,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:27:01,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:27:01,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 08:27:01,079 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:01,081 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:27:01,081 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:27:01,081 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:27:01,142 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:27:01,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 08:27:02,155 INFO L124 PetriNetUnfolderBase]: 966/5380 cut-off events. [2023-08-04 08:27:02,156 INFO L125 PetriNetUnfolderBase]: For 602/737 co-relation queries the response was YES. [2023-08-04 08:27:02,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 5380 events. 966/5380 cut-off events. For 602/737 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46932 event pairs, 22 based on Foata normal form. 0/4649 useless extension candidates. Maximal degree in co-relation 3352. Up to 192 conditions per place. [2023-08-04 08:27:02,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 08:27:02,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 705 transitions, 1500 flow [2023-08-04 08:27:02,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:27:02,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 705 transitions, 1500 flow [2023-08-04 08:27:02,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 705 transitions, 1500 flow [2023-08-04 08:27:02,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 08:27:03,302 INFO L124 PetriNetUnfolderBase]: 966/5380 cut-off events. [2023-08-04 08:27:03,302 INFO L125 PetriNetUnfolderBase]: For 602/737 co-relation queries the response was YES. [2023-08-04 08:27:03,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 5380 events. 966/5380 cut-off events. For 602/737 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46932 event pairs, 22 based on Foata normal form. 0/4649 useless extension candidates. Maximal degree in co-relation 3352. Up to 192 conditions per place. [2023-08-04 08:27:03,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 119520 [2023-08-04 08:27:20,366 INFO L134 LiptonReduction]: Checked pairs total: 274122 [2023-08-04 08:27:20,367 INFO L136 LiptonReduction]: Total number of compositions: 742 [2023-08-04 08:27:20,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:27:20,369 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;@6a4811c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:27:20,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:27:20,373 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:27:20,373 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-04 08:27:20,373 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:27:20,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:20,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:20,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:20,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:20,374 INFO L85 PathProgramCache]: Analyzing trace with hash 906442185, now seen corresponding path program 1 times [2023-08-04 08:27:20,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:20,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865356047] [2023-08-04 08:27:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:20,418 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 08:27:20,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:20,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865356047] [2023-08-04 08:27:20,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865356047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:20,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:20,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:20,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903972935] [2023-08-04 08:27:20,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:20,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:20,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:27:20,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1447 [2023-08-04 08:27:20,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 639.3333333333334) internal successors, (1918), 3 states have internal predecessors, (1918), 0 states have call successors, (0), 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 08:27:20,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:20,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1447 [2023-08-04 08:27:20,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand