/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_parallel-misc-1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:47:07,916 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:47:07,966 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:47:07,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:47:07,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:47:07,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:47:07,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:47:07,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:47:07,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:47:07,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:47:07,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:47:07,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:47:07,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:47:07,993 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:47:07,993 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:47:07,993 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:47:07,994 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:47:07,994 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:47:07,994 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:47:07,995 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:47:07,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:47:07,995 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:47:07,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:47:07,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:47:07,996 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:47:07,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:47:07,997 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:47:07,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:47:07,998 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:47:07,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:47:07,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:47:07,999 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:47:07,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:47:07,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:47:08,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:47:08,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:47:08,000 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:47:08,000 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:47:08,001 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:47:08,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:47:08,001 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:47:08,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:47:08,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:47:08,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:47:08,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:47:08,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:47:08,221 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:47:08,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-1.wvr_bound2.c [2023-08-04 08:47:09,414 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:47:09,630 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:47:09,630 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-1.wvr_bound2.c [2023-08-04 08:47:09,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c1d57b97/043b12a30f2e4a42b2fdca3e39150c04/FLAGe42a34084 [2023-08-04 08:47:09,656 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c1d57b97/043b12a30f2e4a42b2fdca3e39150c04 [2023-08-04 08:47:09,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:47:09,665 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:47:09,669 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:47:09,669 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:47:09,672 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:47:09,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d47c3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09, skipping insertion in model container [2023-08-04 08:47:09,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,700 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:47:09,848 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_parallel-misc-1.wvr_bound2.c[2917,2930] [2023-08-04 08:47:09,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:47:09,867 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:47:09,888 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_parallel-misc-1.wvr_bound2.c[2917,2930] [2023-08-04 08:47:09,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:47:09,905 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:47:09,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09 WrapperNode [2023-08-04 08:47:09,906 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:47:09,907 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:47:09,907 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:47:09,907 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:47:09,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,955 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 319 [2023-08-04 08:47:09,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:47:09,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:47:09,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:47:09,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:47:09,968 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:09,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:10,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:10,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:47:10,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:47:10,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:47:10,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:47:10,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (1/1) ... [2023-08-04 08:47:10,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:47:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:10,051 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 08:47:10,058 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 08:47:10,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:47:10,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:47:10,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:47:10,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:47:10,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:47:10,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:47:10,083 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 08:47:10,171 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:47:10,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:47:10,691 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:47:10,703 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:47:10,704 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 08:47:10,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:47:10 BoogieIcfgContainer [2023-08-04 08:47:10,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:47:10,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:47:10,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:47:10,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:47:10,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:47:09" (1/3) ... [2023-08-04 08:47:10,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b509fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:47:10, skipping insertion in model container [2023-08-04 08:47:10,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:47:09" (2/3) ... [2023-08-04 08:47:10,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b509fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:47:10, skipping insertion in model container [2023-08-04 08:47:10,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:47:10" (3/3) ... [2023-08-04 08:47:10,713 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-misc-1.wvr_bound2.c [2023-08-04 08:47:10,721 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:47:10,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:47:10,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:47:10,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:47:10,837 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:47:10,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:11,129 INFO L124 PetriNetUnfolderBase]: 64/612 cut-off events. [2023-08-04 08:47:11,130 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-04 08:47:11,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 612 events. 64/612 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2650 event pairs, 0 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 310. Up to 8 conditions per place. [2023-08-04 08:47:11,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:11,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:11,159 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:11,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:11,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:11,276 INFO L124 PetriNetUnfolderBase]: 64/612 cut-off events. [2023-08-04 08:47:11,276 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-04 08:47:11,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 612 events. 64/612 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2650 event pairs, 0 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 310. Up to 8 conditions per place. [2023-08-04 08:47:11,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 45792 [2023-08-04 08:47:21,133 INFO L134 LiptonReduction]: Checked pairs total: 45312 [2023-08-04 08:47:21,133 INFO L136 LiptonReduction]: Total number of compositions: 435 [2023-08-04 08:47:21,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:47:21,161 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;@35027311, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:21,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:47:21,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:21,168 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-08-04 08:47:21,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:21,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:21,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:47:21,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:21,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash -362029129, now seen corresponding path program 1 times [2023-08-04 08:47:21,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:21,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764089699] [2023-08-04 08:47:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:21,484 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 08:47:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:21,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764089699] [2023-08-04 08:47:21,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764089699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:21,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:21,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:47:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570953853] [2023-08-04 08:47:21,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:21,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:21,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:21,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 811 [2023-08-04 08:47:21,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 37 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 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 08:47:21,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:21,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 811 [2023-08-04 08:47:21,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:21,716 INFO L124 PetriNetUnfolderBase]: 416/663 cut-off events. [2023-08-04 08:47:21,716 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 08:47:21,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 663 events. 416/663 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2418 event pairs, 105 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 1144. Up to 623 conditions per place. [2023-08-04 08:47:21,721 INFO L140 encePairwiseOnDemand]: 806/811 looper letters, 34 selfloop transitions, 2 changer transitions 3/41 dead transitions. [2023-08-04 08:47:21,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 178 flow [2023-08-04 08:47:21,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1054 transitions. [2023-08-04 08:47:21,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332100287710645 [2023-08-04 08:47:21,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1054 transitions. [2023-08-04 08:47:21,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1054 transitions. [2023-08-04 08:47:21,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:21,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1054 transitions. [2023-08-04 08:47:21,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.3333333333333) internal successors, (1054), 3 states have internal predecessors, (1054), 0 states have call successors, (0), 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 08:47:21,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:21,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:21,768 INFO L175 Difference]: Start difference. First operand has 32 places, 37 transitions, 96 flow. Second operand 3 states and 1054 transitions. [2023-08-04 08:47:21,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 178 flow [2023-08-04 08:47:21,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:47:21,773 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 92 flow [2023-08-04 08:47:21,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=811, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-04 08:47:21,778 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-04 08:47:21,778 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 92 flow [2023-08-04 08:47:21,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 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 08:47:21,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:21,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:21,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:47:21,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:21,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:21,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2136580271, now seen corresponding path program 1 times [2023-08-04 08:47:21,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:21,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714397583] [2023-08-04 08:47:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:21,881 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 08:47:21,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714397583] [2023-08-04 08:47:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714397583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:21,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328730607] [2023-08-04 08:47:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:21,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:21,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:21,889 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 08:47:21,894 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 08:47:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:21,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:21,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:21,991 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 08:47:21,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:21,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328730607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:21,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:21,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:47:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743437610] [2023-08-04 08:47:21,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:21,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:22,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 811 [2023-08-04 08:47:22,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 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 08:47:22,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:22,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 811 [2023-08-04 08:47:22,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:22,141 INFO L124 PetriNetUnfolderBase]: 412/644 cut-off events. [2023-08-04 08:47:22,141 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 08:47:22,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 644 events. 412/644 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2088 event pairs, 112 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 1124. Up to 565 conditions per place. [2023-08-04 08:47:22,145 INFO L140 encePairwiseOnDemand]: 808/811 looper letters, 39 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-04 08:47:22,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 198 flow [2023-08-04 08:47:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-08-04 08:47:22,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43444307439375257 [2023-08-04 08:47:22,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-08-04 08:47:22,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-08-04 08:47:22,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:22,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-08-04 08:47:22,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 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 08:47:22,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:22,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:22,169 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 92 flow. Second operand 3 states and 1057 transitions. [2023-08-04 08:47:22,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 198 flow [2023-08-04 08:47:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 188 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:47:22,172 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 90 flow [2023-08-04 08:47:22,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=811, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-08-04 08:47:22,174 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-04 08:47:22,174 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 90 flow [2023-08-04 08:47:22,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 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 08:47:22,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:22,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:22,188 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 08:47:22,388 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 08:47:22,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:22,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1690528802, now seen corresponding path program 1 times [2023-08-04 08:47:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766659506] [2023-08-04 08:47:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:22,512 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 08:47:22,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766659506] [2023-08-04 08:47:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766659506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126875937] [2023-08-04 08:47:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:22,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:22,523 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 08:47:22,544 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 08:47:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:22,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:22,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:22,619 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 08:47:22,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:22,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126875937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:22,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:22,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:47:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15926529] [2023-08-04 08:47:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:22,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:22,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:22,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 811 [2023-08-04 08:47:22,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 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 08:47:22,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:22,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 811 [2023-08-04 08:47:22,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:22,741 INFO L124 PetriNetUnfolderBase]: 274/442 cut-off events. [2023-08-04 08:47:22,742 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 08:47:22,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 442 events. 274/442 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1280 event pairs, 102 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 255. Up to 303 conditions per place. [2023-08-04 08:47:22,744 INFO L140 encePairwiseOnDemand]: 808/811 looper letters, 43 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 08:47:22,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 212 flow [2023-08-04 08:47:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1060 transitions. [2023-08-04 08:47:22,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356761200164406 [2023-08-04 08:47:22,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1060 transitions. [2023-08-04 08:47:22,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1060 transitions. [2023-08-04 08:47:22,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:22,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1060 transitions. [2023-08-04 08:47:22,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.3333333333333) internal successors, (1060), 3 states have internal predecessors, (1060), 0 states have call successors, (0), 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 08:47:22,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:22,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:22,756 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 90 flow. Second operand 3 states and 1060 transitions. [2023-08-04 08:47:22,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 212 flow [2023-08-04 08:47:22,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:47:22,758 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 98 flow [2023-08-04 08:47:22,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=811, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-08-04 08:47:22,758 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-04 08:47:22,759 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 98 flow [2023-08-04 08:47:22,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 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 08:47:22,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:22,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:22,772 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 08:47:22,971 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 08:47:22,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:22,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2013544736, now seen corresponding path program 1 times [2023-08-04 08:47:22,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89214805] [2023-08-04 08:47:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:22,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:23,073 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 08:47:23,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:23,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89214805] [2023-08-04 08:47:23,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89214805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:23,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439014205] [2023-08-04 08:47:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:23,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:23,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:23,076 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 08:47:23,078 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 08:47:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:23,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:23,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:23,168 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 08:47:23,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439014205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:23,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:23,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:47:23,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871716990] [2023-08-04 08:47:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:23,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:23,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:23,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:23,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 811 [2023-08-04 08:47:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 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 08:47:23,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:23,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 811 [2023-08-04 08:47:23,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:23,284 INFO L124 PetriNetUnfolderBase]: 263/425 cut-off events. [2023-08-04 08:47:23,285 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 08:47:23,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 425 events. 263/425 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1204 event pairs, 139 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 433. Up to 376 conditions per place. [2023-08-04 08:47:23,287 INFO L140 encePairwiseOnDemand]: 808/811 looper letters, 39 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2023-08-04 08:47:23,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 206 flow [2023-08-04 08:47:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-08-04 08:47:23,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43444307439375257 [2023-08-04 08:47:23,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-08-04 08:47:23,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-08-04 08:47:23,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:23,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-08-04 08:47:23,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 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 08:47:23,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:23,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 811.0) internal successors, (3244), 4 states have internal predecessors, (3244), 0 states have call successors, (0), 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 08:47:23,300 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 98 flow. Second operand 3 states and 1057 transitions. [2023-08-04 08:47:23,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 206 flow [2023-08-04 08:47:23,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 45 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:23,302 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 100 flow [2023-08-04 08:47:23,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=811, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-04 08:47:23,303 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-04 08:47:23,303 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 100 flow [2023-08-04 08:47:23,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 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 08:47:23,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:23,304 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 08:47:23,312 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 08:47:23,509 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 08:47:23,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:23,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:23,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1480686121, now seen corresponding path program 1 times [2023-08-04 08:47:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:23,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481512307] [2023-08-04 08:47:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:23,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:23,594 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 08:47:23,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481512307] [2023-08-04 08:47:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481512307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94940319] [2023-08-04 08:47:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:23,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:23,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:23,600 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 08:47:23,628 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 08:47:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:23,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:23,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:23,731 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 08:47:23,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:23,753 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 08:47:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94940319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:23,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:47:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487114140] [2023-08-04 08:47:23,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:23,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:23,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 811 [2023-08-04 08:47:23,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 342.0) internal successors, (1710), 5 states have internal predecessors, (1710), 0 states have call successors, (0), 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 08:47:23,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:23,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 811 [2023-08-04 08:47:23,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:23,797 INFO L124 PetriNetUnfolderBase]: 13/28 cut-off events. [2023-08-04 08:47:23,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:23,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 28 events. 13/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 0 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 61. Up to 18 conditions per place. [2023-08-04 08:47:23,798 INFO L140 encePairwiseOnDemand]: 808/811 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-04 08:47:23,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 17 transitions, 72 flow [2023-08-04 08:47:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1366 transitions. [2023-08-04 08:47:23,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4210850801479655 [2023-08-04 08:47:23,802 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1366 transitions. [2023-08-04 08:47:23,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1366 transitions. [2023-08-04 08:47:23,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:23,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1366 transitions. [2023-08-04 08:47:23,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.5) internal successors, (1366), 4 states have internal predecessors, (1366), 0 states have call successors, (0), 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 08:47:23,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 811.0) internal successors, (4055), 5 states have internal predecessors, (4055), 0 states have call successors, (0), 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 08:47:23,813 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 811.0) internal successors, (4055), 5 states have internal predecessors, (4055), 0 states have call successors, (0), 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 08:47:23,814 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 100 flow. Second operand 4 states and 1366 transitions. [2023-08-04 08:47:23,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 17 transitions, 72 flow [2023-08-04 08:47:23,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:23,814 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:47:23,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=811, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 08:47:23,815 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -14 predicate places. [2023-08-04 08:47:23,815 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:47:23,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 342.0) internal successors, (1710), 5 states have internal predecessors, (1710), 0 states have call successors, (0), 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 08:47:23,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:47:23,828 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 08:47:24,024 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 08:47:24,025 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:47:24,027 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:47:24,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:24,135 INFO L124 PetriNetUnfolderBase]: 64/612 cut-off events. [2023-08-04 08:47:24,136 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-04 08:47:24,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 612 events. 64/612 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2650 event pairs, 0 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 310. Up to 8 conditions per place. [2023-08-04 08:47:24,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:24,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:24,146 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:24,146 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:24,147 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:24,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 08:47:24,226 INFO L124 PetriNetUnfolderBase]: 64/612 cut-off events. [2023-08-04 08:47:24,226 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-04 08:47:24,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 612 events. 64/612 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2650 event pairs, 0 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 310. Up to 8 conditions per place. [2023-08-04 08:47:24,247 INFO L119 LiptonReduction]: Number of co-enabled transitions 45792 [2023-08-04 08:47:33,435 INFO L134 LiptonReduction]: Checked pairs total: 45123 [2023-08-04 08:47:33,435 INFO L136 LiptonReduction]: Total number of compositions: 432 [2023-08-04 08:47:33,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:47:33,437 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;@35027311, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:33,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:47:33,441 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:33,441 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2023-08-04 08:47:33,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:33,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:33,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 08:47:33,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:47:33,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash -539764331, now seen corresponding path program 1 times [2023-08-04 08:47:33,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:33,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605366872] [2023-08-04 08:47:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:33,483 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:47:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:33,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:47:33,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:47:33,538 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:47:33,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:47:33,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:47:33,539 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:47:33,540 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:47:33,541 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:47:33,541 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:47:33,597 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:47:33,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 08:47:34,037 INFO L124 PetriNetUnfolderBase]: 210/1667 cut-off events. [2023-08-04 08:47:34,037 INFO L125 PetriNetUnfolderBase]: For 72/113 co-relation queries the response was YES. [2023-08-04 08:47:34,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1667 events. 210/1667 cut-off events. For 72/113 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11437 event pairs, 1 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 1040. Up to 32 conditions per place. [2023-08-04 08:47:34,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 08:47:34,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 594 transitions, 1236 flow [2023-08-04 08:47:34,102 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:34,103 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 541 places, 594 transitions, 1236 flow [2023-08-04 08:47:34,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 541 places, 594 transitions, 1236 flow [2023-08-04 08:47:34,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 08:47:34,484 INFO L124 PetriNetUnfolderBase]: 210/1667 cut-off events. [2023-08-04 08:47:34,484 INFO L125 PetriNetUnfolderBase]: For 72/113 co-relation queries the response was YES. [2023-08-04 08:47:34,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1667 events. 210/1667 cut-off events. For 72/113 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11437 event pairs, 1 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 1040. Up to 32 conditions per place. [2023-08-04 08:47:34,662 INFO L119 LiptonReduction]: Number of co-enabled transitions 185712 [2023-08-04 08:47:44,900 INFO L134 LiptonReduction]: Checked pairs total: 278722 [2023-08-04 08:47:44,900 INFO L136 LiptonReduction]: Total number of compositions: 655 [2023-08-04 08:47:44,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:47:44,903 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;@35027311, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:44,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:47:44,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:44,905 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-04 08:47:44,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:44,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:44,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:47:44,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:44,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash -64112539, now seen corresponding path program 1 times [2023-08-04 08:47:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:44,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667617287] [2023-08-04 08:47:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:44,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:44,929 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 08:47:44,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667617287] [2023-08-04 08:47:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667617287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:44,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:44,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:47:44,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593107742] [2023-08-04 08:47:44,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:44,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:44,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1249 [2023-08-04 08:47:44,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 534.0) internal successors, (1602), 3 states have internal predecessors, (1602), 0 states have call successors, (0), 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 08:47:44,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:44,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1249 [2023-08-04 08:47:44,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:48:48,644 INFO L124 PetriNetUnfolderBase]: 709167/905381 cut-off events. [2023-08-04 08:48:48,644 INFO L125 PetriNetUnfolderBase]: For 40607/40607 co-relation queries the response was YES. [2023-08-04 08:48:50,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1801286 conditions, 905381 events. 709167/905381 cut-off events. For 40607/40607 co-relation queries the response was YES. Maximal size of possible extension queue 29229. Compared 6350695 event pairs, 560900 based on Foata normal form. 59520/838815 useless extension candidates. Maximal degree in co-relation 1156912. Up to 875294 conditions per place. [2023-08-04 08:48:53,908 INFO L140 encePairwiseOnDemand]: 1239/1249 looper letters, 86 selfloop transitions, 2 changer transitions 2/111 dead transitions. [2023-08-04 08:48:53,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 446 flow [2023-08-04 08:48:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:48:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:48:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1693 transitions. [2023-08-04 08:48:53,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182812917000265 [2023-08-04 08:48:53,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1693 transitions. [2023-08-04 08:48:53,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1693 transitions. [2023-08-04 08:48:53,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:48:53,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1693 transitions. [2023-08-04 08:48:53,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 564.3333333333334) internal successors, (1693), 3 states have internal predecessors, (1693), 0 states have call successors, (0), 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 08:48:53,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:48:53,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:48:53,925 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 256 flow. Second operand 3 states and 1693 transitions. [2023-08-04 08:48:53,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 446 flow [2023-08-04 08:48:53,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:48:53,967 INFO L231 Difference]: Finished difference. Result has 92 places, 96 transitions, 242 flow [2023-08-04 08:48:53,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1249, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=92, PETRI_TRANSITIONS=96} [2023-08-04 08:48:53,968 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 08:48:53,969 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 96 transitions, 242 flow [2023-08-04 08:48:53,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 534.0) internal successors, (1602), 3 states have internal predecessors, (1602), 0 states have call successors, (0), 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 08:48:53,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:48:53,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:48:53,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:48:53,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:48:53,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:48:53,970 INFO L85 PathProgramCache]: Analyzing trace with hash 160213938, now seen corresponding path program 1 times [2023-08-04 08:48:53,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:48:53,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392701279] [2023-08-04 08:48:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:53,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:48:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:54,010 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 08:48:54,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:48:54,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392701279] [2023-08-04 08:48:54,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392701279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:48:54,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570640146] [2023-08-04 08:48:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:54,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:48:54,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:48:54,013 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 08:48:54,014 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 08:48:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:54,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:48:54,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:48:54,099 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 08:48:54,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:48:54,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570640146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:48:54,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:48:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:48:54,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614828829] [2023-08-04 08:48:54,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:48:54,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:48:54,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:48:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:48:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:48:54,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1249 [2023-08-04 08:48:54,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 96 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 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 08:48:54,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:48:54,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1249 [2023-08-04 08:48:54,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:49:57,430 INFO L124 PetriNetUnfolderBase]: 706261/904674 cut-off events. [2023-08-04 08:49:57,430 INFO L125 PetriNetUnfolderBase]: For 34886/34886 co-relation queries the response was YES. [2023-08-04 08:49:59,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1799477 conditions, 904674 events. 706261/904674 cut-off events. For 34886/34886 co-relation queries the response was YES. Maximal size of possible extension queue 29437. Compared 6412051 event pairs, 436584 based on Foata normal form. 0/776817 useless extension candidates. Maximal degree in co-relation 1234441. Up to 869741 conditions per place. [2023-08-04 08:50:03,206 INFO L140 encePairwiseOnDemand]: 1246/1249 looper letters, 110 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-08-04 08:50:03,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 540 flow [2023-08-04 08:50:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1708 transitions. [2023-08-04 08:50:03,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558313317320523 [2023-08-04 08:50:03,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1708 transitions. [2023-08-04 08:50:03,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1708 transitions. [2023-08-04 08:50:03,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:03,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1708 transitions. [2023-08-04 08:50:03,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 569.3333333333334) internal successors, (1708), 3 states have internal predecessors, (1708), 0 states have call successors, (0), 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 08:50:03,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:50:03,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:50:03,221 INFO L175 Difference]: Start difference. First operand has 92 places, 96 transitions, 242 flow. Second operand 3 states and 1708 transitions. [2023-08-04 08:50:03,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 540 flow [2023-08-04 08:50:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 532 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:50:03,351 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 246 flow [2023-08-04 08:50:03,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1249, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2023-08-04 08:50:03,352 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2023-08-04 08:50:03,352 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 246 flow [2023-08-04 08:50:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 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 08:50:03,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:03,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:03,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:50:03,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:03,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:03,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:03,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1619251452, now seen corresponding path program 1 times [2023-08-04 08:50:03,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:03,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457845134] [2023-08-04 08:50:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:03,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:03,610 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 08:50:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457845134] [2023-08-04 08:50:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457845134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552777808] [2023-08-04 08:50:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:03,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:03,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:03,612 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 08:50:03,614 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 08:50:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:03,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:03,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:03,700 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 08:50:03,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552777808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:03,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:03,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:50:03,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037732266] [2023-08-04 08:50:03,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:03,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:03,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:03,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:03,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1249 [2023-08-04 08:50:03,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 536.0) internal successors, (1608), 3 states have internal predecessors, (1608), 0 states have call successors, (0), 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 08:50:03,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:03,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1249 [2023-08-04 08:50:03,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:48,537 INFO L124 PetriNetUnfolderBase]: 492361/639109 cut-off events. [2023-08-04 08:50:48,537 INFO L125 PetriNetUnfolderBase]: For 46503/46503 co-relation queries the response was YES. [2023-08-04 08:50:50,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312969 conditions, 639109 events. 492361/639109 cut-off events. For 46503/46503 co-relation queries the response was YES. Maximal size of possible extension queue 20510. Compared 4655492 event pairs, 269487 based on Foata normal form. 0/581524 useless extension candidates. Maximal degree in co-relation 836370. Up to 406379 conditions per place. [2023-08-04 08:50:52,415 INFO L140 encePairwiseOnDemand]: 1246/1249 looper letters, 127 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2023-08-04 08:50:52,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 620 flow [2023-08-04 08:50:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1724 transitions. [2023-08-04 08:50:52,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46010141446490527 [2023-08-04 08:50:52,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1724 transitions. [2023-08-04 08:50:52,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1724 transitions. [2023-08-04 08:50:52,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:52,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1724 transitions. [2023-08-04 08:50:52,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 3 states have internal predecessors, (1724), 0 states have call successors, (0), 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 08:50:52,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:50:52,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:50:52,429 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 246 flow. Second operand 3 states and 1724 transitions. [2023-08-04 08:50:52,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 620 flow [2023-08-04 08:50:52,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 150 transitions, 618 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:50:52,442 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 256 flow [2023-08-04 08:50:52,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1249, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-08-04 08:50:52,443 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 08:50:52,443 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 256 flow [2023-08-04 08:50:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 536.0) internal successors, (1608), 3 states have internal predecessors, (1608), 0 states have call successors, (0), 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 08:50:52,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:52,444 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] [2023-08-04 08:50:52,453 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 08:50:52,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:52,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:52,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:52,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1886774433, now seen corresponding path program 1 times [2023-08-04 08:50:52,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:52,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810969898] [2023-08-04 08:50:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:52,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:52,706 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 08:50:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:52,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810969898] [2023-08-04 08:50:52,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810969898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:52,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287009352] [2023-08-04 08:50:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:52,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:52,708 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 08:50:52,710 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 08:50:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:52,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:52,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:52,812 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 08:50:52,812 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:52,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287009352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:52,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:52,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:50:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968283686] [2023-08-04 08:50:52,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:52,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:52,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:52,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:52,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1249 [2023-08-04 08:50:52,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 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 08:50:52,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:52,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1249 [2023-08-04 08:50:52,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:51:34,695 INFO L124 PetriNetUnfolderBase]: 480228/621741 cut-off events. [2023-08-04 08:51:34,713 INFO L125 PetriNetUnfolderBase]: For 150344/150344 co-relation queries the response was YES. [2023-08-04 08:51:36,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1313919 conditions, 621741 events. 480228/621741 cut-off events. For 150344/150344 co-relation queries the response was YES. Maximal size of possible extension queue 19937. Compared 4404085 event pairs, 371029 based on Foata normal form. 0/577181 useless extension candidates. Maximal degree in co-relation 837880. Up to 546871 conditions per place. [2023-08-04 08:51:39,815 INFO L140 encePairwiseOnDemand]: 1246/1249 looper letters, 128 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2023-08-04 08:51:39,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 151 transitions, 632 flow [2023-08-04 08:51:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:51:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:51:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1724 transitions. [2023-08-04 08:51:39,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46010141446490527 [2023-08-04 08:51:39,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1724 transitions. [2023-08-04 08:51:39,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1724 transitions. [2023-08-04 08:51:39,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:51:39,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1724 transitions. [2023-08-04 08:51:39,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 3 states have internal predecessors, (1724), 0 states have call successors, (0), 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 08:51:39,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:51:39,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1249.0) internal successors, (4996), 4 states have internal predecessors, (4996), 0 states have call successors, (0), 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 08:51:39,829 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 256 flow. Second operand 3 states and 1724 transitions. [2023-08-04 08:51:39,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 151 transitions, 632 flow [2023-08-04 08:52:02,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 151 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:02,804 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 266 flow [2023-08-04 08:52:02,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1249, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2023-08-04 08:52:02,805 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2023-08-04 08:52:02,805 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 266 flow [2023-08-04 08:52:02,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 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 08:52:02,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:02,806 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] [2023-08-04 08:52:02,815 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 08:52:03,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:03,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:03,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash -906906956, now seen corresponding path program 1 times [2023-08-04 08:52:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:03,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611042013] [2023-08-04 08:52:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:03,069 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 08:52:03,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:03,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611042013] [2023-08-04 08:52:03,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611042013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:03,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729517416] [2023-08-04 08:52:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:03,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:03,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:03,071 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 08:52:03,073 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 08:52:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:03,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:52:03,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:03,186 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 08:52:03,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:52:03,203 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 08:52:03,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729517416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:52:03,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:52:03,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:52:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716900569] [2023-08-04 08:52:03,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:52:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:52:03,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:52:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:03,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1249 [2023-08-04 08:52:03,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 536.2) internal successors, (2681), 5 states have internal predecessors, (2681), 0 states have call successors, (0), 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 08:52:03,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:03,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1249 [2023-08-04 08:52:03,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand