/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/pthread_fib_unsafe-5_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:47:23,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:47:23,755 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:47:23,759 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:47:23,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:47:23,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:47:23,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:47:23,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:47:23,780 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:47:23,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:47:23,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:47:23,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:47:23,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:47:23,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:47:23,783 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:47:23,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:47:23,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:47:23,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:47:23,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:47:23,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:47:23,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:47:23,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:47:23,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:47:23,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:47:23,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:47:23,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:47:23,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:47:23,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:47:23,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:47:23,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:47:23,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:47:23,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:47:23,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:47:23,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:47:23,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:47:23,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:47:23,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:47:23,790 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:47:23,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:47:23,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:47:23,791 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:47:23,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:47:23,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:47:23,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:47:24,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:47:24,002 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:47:24,002 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:47:24,003 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-5_bound2.i [2023-08-04 07:47:25,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:47:25,377 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:47:25,378 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-5_bound2.i [2023-08-04 07:47:25,395 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de2b3b458/a5fad627e9ab4ed0b3f4ce75d43cda85/FLAG2ca5c0372 [2023-08-04 07:47:25,409 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de2b3b458/a5fad627e9ab4ed0b3f4ce75d43cda85 [2023-08-04 07:47:25,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:47:25,415 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:47:25,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:47:25,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:47:25,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:47:25,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b41d51f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25, skipping insertion in model container [2023-08-04 07:47:25,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,474 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:47:25,781 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-5_bound2.i[30243,30256] [2023-08-04 07:47:25,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:47:25,817 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:47:25,832 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [229] [2023-08-04 07:47:25,834 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [230] [2023-08-04 07:47:25,845 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-5_bound2.i[30243,30256] [2023-08-04 07:47:25,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:47:25,880 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:47:25,880 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:47:25,886 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:47:25,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25 WrapperNode [2023-08-04 07:47:25,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:47:25,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:47:25,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:47:25,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:47:25,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,951 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-08-04 07:47:25,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:47:25,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:47:25,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:47:25,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:47:25,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,967 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,983 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,986 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:25,997 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:47:25,998 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:47:25,998 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:47:25,998 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:47:25,999 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (1/1) ... [2023-08-04 07:47:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:47:26,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:26,027 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 07:47:26,050 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 07:47:26,064 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 07:47:26,064 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 07:47:26,064 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 07:47:26,064 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 07:47:26,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:47:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:47:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:47:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:47:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:47:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:47:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:47:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:47:26,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:47:26,069 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 07:47:26,216 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:47:26,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:47:26,370 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:47:26,376 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:47:26,377 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-04 07:47:26,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:47:26 BoogieIcfgContainer [2023-08-04 07:47:26,379 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:47:26,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:47:26,381 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:47:26,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:47:26,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:47:25" (1/3) ... [2023-08-04 07:47:26,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d15596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:47:26, skipping insertion in model container [2023-08-04 07:47:26,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:47:25" (2/3) ... [2023-08-04 07:47:26,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d15596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:47:26, skipping insertion in model container [2023-08-04 07:47:26,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:47:26" (3/3) ... [2023-08-04 07:47:26,386 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_fib_unsafe-5_bound2.i [2023-08-04 07:47:26,395 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:47:26,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:47:26,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:47:26,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:47:26,455 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:47:26,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:26,572 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:47:26,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:26,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:47:26,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:26,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:26,592 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:47:26,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:26,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:26,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:26,655 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:47:26,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:26,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:47:26,660 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-04 07:47:29,877 INFO L134 LiptonReduction]: Checked pairs total: 2006 [2023-08-04 07:47:29,877 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 07:47:29,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:47:29,894 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2e456fce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:47:29,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:47:29,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:47:29,898 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-04 07:47:29,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:29,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:29,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:47:29,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:29,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash 12905250, now seen corresponding path program 1 times [2023-08-04 07:47:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:29,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384989553] [2023-08-04 07:47:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:30,128 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 07:47:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:30,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384989553] [2023-08-04 07:47:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384989553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:47:30,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:47:30,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:47:30,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029111842] [2023-08-04 07:47:30,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:47:30,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:47:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:47:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:47:30,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-04 07:47:30,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 07:47:30,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:30,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-04 07:47:30,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:30,254 INFO L124 PetriNetUnfolderBase]: 136/222 cut-off events. [2023-08-04 07:47:30,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:30,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 222 events. 136/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 587 event pairs, 30 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 438. Up to 211 conditions per place. [2023-08-04 07:47:30,257 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 18 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-04 07:47:30,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 102 flow [2023-08-04 07:47:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:47:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:47:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-04 07:47:30,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864433811802233 [2023-08-04 07:47:30,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-04 07:47:30,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-04 07:47:30,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:30,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-04 07:47:30,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 07:47:30,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:47:30,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:47:30,284 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 50 flow. Second operand 3 states and 305 transitions. [2023-08-04 07:47:30,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 102 flow [2023-08-04 07:47:30,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:47:30,287 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 48 flow [2023-08-04 07:47:30,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-04 07:47:30,292 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-04 07:47:30,292 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 48 flow [2023-08-04 07:47:30,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 07:47:30,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:30,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:30,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:47:30,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:30,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:30,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1552267812, now seen corresponding path program 1 times [2023-08-04 07:47:30,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:30,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502763979] [2023-08-04 07:47:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:30,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:30,399 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 07:47:30,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:30,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502763979] [2023-08-04 07:47:30,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502763979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:30,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467030956] [2023-08-04 07:47:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:30,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:30,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:30,403 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 07:47:30,407 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 07:47:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:30,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:47:30,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:30,494 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 07:47:30,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:47:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467030956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:47:30,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:47:30,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:47:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087907292] [2023-08-04 07:47:30,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:47:30,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:47:30,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:30,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:47:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:47:30,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-04 07:47:30,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 07:47:30,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:30,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-04 07:47:30,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:30,583 INFO L124 PetriNetUnfolderBase]: 106/168 cut-off events. [2023-08-04 07:47:30,583 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:47:30,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 168 events. 106/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 410 event pairs, 28 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 345. Up to 136 conditions per place. [2023-08-04 07:47:30,585 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 21 selfloop transitions, 2 changer transitions 1/24 dead transitions. [2023-08-04 07:47:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 110 flow [2023-08-04 07:47:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:47:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:47:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 07:47:30,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48963317384370014 [2023-08-04 07:47:30,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 07:47:30,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 07:47:30,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:30,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 07:47:30,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 07:47:30,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:47:30,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:47:30,592 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 48 flow. Second operand 3 states and 307 transitions. [2023-08-04 07:47:30,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 110 flow [2023-08-04 07:47:30,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 24 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:47:30,593 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 52 flow [2023-08-04 07:47:30,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-04 07:47:30,594 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-04 07:47:30,594 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 52 flow [2023-08-04 07:47:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 07:47:30,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:30,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:30,604 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 07:47:30,800 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 07:47:30,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:30,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash 313871766, now seen corresponding path program 1 times [2023-08-04 07:47:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904241892] [2023-08-04 07:47:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:30,905 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 07:47:30,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904241892] [2023-08-04 07:47:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904241892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204451918] [2023-08-04 07:47:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:30,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:30,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:30,913 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 07:47:30,939 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 07:47:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:30,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:47:30,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:31,002 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 07:47:31,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:47:31,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204451918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:47:31,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:47:31,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:47:31,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101426472] [2023-08-04 07:47:31,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:47:31,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:47:31,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:47:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:47:31,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-04 07:47:31,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 07:47:31,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:31,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-04 07:47:31,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:31,077 INFO L124 PetriNetUnfolderBase]: 124/195 cut-off events. [2023-08-04 07:47:31,077 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 07:47:31,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 195 events. 124/195 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 448 event pairs, 50 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 426. Up to 132 conditions per place. [2023-08-04 07:47:31,080 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 22 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-04 07:47:31,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 114 flow [2023-08-04 07:47:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:47:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:47:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 07:47:31,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48963317384370014 [2023-08-04 07:47:31,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 07:47:31,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 07:47:31,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:31,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 07:47:31,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 07:47:31,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:47:31,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:47:31,094 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 52 flow. Second operand 3 states and 307 transitions. [2023-08-04 07:47:31,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 114 flow [2023-08-04 07:47:31,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:47:31,096 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 60 flow [2023-08-04 07:47:31,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-08-04 07:47:31,097 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2023-08-04 07:47:31,097 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 60 flow [2023-08-04 07:47:31,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 07:47:31,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:31,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:31,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 07:47:31,303 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 07:47:31,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:31,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1140090476, now seen corresponding path program 1 times [2023-08-04 07:47:31,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:31,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121460850] [2023-08-04 07:47:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:31,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:31,380 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 07:47:31,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:31,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121460850] [2023-08-04 07:47:31,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121460850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099768285] [2023-08-04 07:47:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:31,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:31,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:31,383 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 07:47:31,385 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 07:47:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:31,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:47:31,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:31,495 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 07:47:31,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:47:31,522 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 07:47:31,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099768285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:47:31,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:47:31,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:47:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063753843] [2023-08-04 07:47:31,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:47:31,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:47:31,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:31,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:47:31,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:47:31,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 209 [2023-08-04 07:47:31,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 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 07:47:31,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:31,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 209 [2023-08-04 07:47:31,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:31,563 INFO L124 PetriNetUnfolderBase]: 7/18 cut-off events. [2023-08-04 07:47:31,564 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:31,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 18 events. 7/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 42. Up to 12 conditions per place. [2023-08-04 07:47:31,568 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:47:31,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 11 transitions, 52 flow [2023-08-04 07:47:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:47:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:47:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 384 transitions. [2023-08-04 07:47:31,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45933014354066987 [2023-08-04 07:47:31,574 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 384 transitions. [2023-08-04 07:47:31,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 384 transitions. [2023-08-04 07:47:31,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:31,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 384 transitions. [2023-08-04 07:47:31,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 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 07:47:31,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 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 07:47:31,578 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 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 07:47:31,578 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 60 flow. Second operand 4 states and 384 transitions. [2023-08-04 07:47:31,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 11 transitions, 52 flow [2023-08-04 07:47:31,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 48 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:47:31,579 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 07:47:31,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 07:47:31,581 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -7 predicate places. [2023-08-04 07:47:31,581 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 07:47:31,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 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 07:47:31,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:47:31,592 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 07:47:31,793 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 07:47:31,793 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:47:31,795 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:47:31,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:31,818 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:47:31,819 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:31,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:47:31,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:31,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:31,821 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:47:31,821 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:31,822 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:31,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:47:31,843 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:47:31,843 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:31,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:47:31,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-04 07:47:34,877 INFO L134 LiptonReduction]: Checked pairs total: 2000 [2023-08-04 07:47:34,877 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 07:47:34,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:47:34,879 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;@2e456fce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:47:34,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:47:34,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:47:34,884 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-08-04 07:47:34,884 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:34,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:34,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:47:34,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:47:34,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1773916636, now seen corresponding path program 1 times [2023-08-04 07:47:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836098146] [2023-08-04 07:47:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:47:34,902 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:47:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:47:34,923 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:47:34,923 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:47:34,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:47:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:47:34,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:47:34,924 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:47:34,925 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:47:34,925 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:47:34,926 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:47:34,941 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:47:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 07:47:34,982 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 07:47:34,983 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:47:34,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 07:47:34,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 07:47:34,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-04 07:47:34,987 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:47:34,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 07:47:34,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 07:47:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 07:47:35,026 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 07:47:35,026 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:47:35,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 07:47:35,037 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-04 07:47:37,458 INFO L134 LiptonReduction]: Checked pairs total: 12666 [2023-08-04 07:47:37,458 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-04 07:47:37,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:47:37,460 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;@2e456fce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:47:37,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:47:37,462 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:47:37,462 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-04 07:47:37,462 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:47:37,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:37,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:47:37,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:37,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 24021282, now seen corresponding path program 1 times [2023-08-04 07:47:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:37,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663775801] [2023-08-04 07:47:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:37,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:37,513 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 07:47:37,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663775801] [2023-08-04 07:47:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663775801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:47:37,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:47:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:47:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388858100] [2023-08-04 07:47:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:47:37,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:47:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:47:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:47:37,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 07:47:37,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:47:37,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:37,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 07:47:37,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:37,909 INFO L124 PetriNetUnfolderBase]: 3244/5215 cut-off events. [2023-08-04 07:47:37,910 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-04 07:47:37,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 5215 events. 3244/5215 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 29125 event pairs, 1386 based on Foata normal form. 0/4666 useless extension candidates. Maximal degree in co-relation 3009. Up to 4201 conditions per place. [2023-08-04 07:47:37,944 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 28 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2023-08-04 07:47:37,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 180 flow [2023-08-04 07:47:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:47:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:47:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 07:47:37,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260196905766527 [2023-08-04 07:47:37,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 07:47:37,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 07:47:37,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:37,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 07:47:37,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 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 07:47:37,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:47:37,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:47:37,953 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 3 states and 374 transitions. [2023-08-04 07:47:37,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 180 flow [2023-08-04 07:47:37,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 07:47:37,958 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 106 flow [2023-08-04 07:47:37,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-04 07:47:37,960 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 07:47:37,960 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 106 flow [2023-08-04 07:47:37,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:47:37,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:37,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:37,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:47:37,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:37,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1241956221, now seen corresponding path program 1 times [2023-08-04 07:47:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:37,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565762337] [2023-08-04 07:47:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:37,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:38,015 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 07:47:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565762337] [2023-08-04 07:47:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565762337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347334763] [2023-08-04 07:47:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:38,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:38,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:38,021 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 07:47:38,043 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 07:47:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:38,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:47:38,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:38,100 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 07:47:38,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:47:38,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347334763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:47:38,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:47:38,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:47:38,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572881810] [2023-08-04 07:47:38,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:47:38,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:47:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:47:38,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:47:38,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 07:47:38,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 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 07:47:38,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:38,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 07:47:38,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:38,395 INFO L124 PetriNetUnfolderBase]: 2665/4138 cut-off events. [2023-08-04 07:47:38,396 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 07:47:38,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7764 conditions, 4138 events. 2665/4138 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20672 event pairs, 1120 based on Foata normal form. 0/3776 useless extension candidates. Maximal degree in co-relation 7725. Up to 3271 conditions per place. [2023-08-04 07:47:38,428 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 07:47:38,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 202 flow [2023-08-04 07:47:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:47:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:47:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 07:47:38,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 07:47:38,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 07:47:38,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 07:47:38,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:38,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 07:47:38,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 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 07:47:38,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:47:38,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:47:38,435 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 106 flow. Second operand 3 states and 379 transitions. [2023-08-04 07:47:38,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 202 flow [2023-08-04 07:47:38,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:47:38,438 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 116 flow [2023-08-04 07:47:38,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-04 07:47:38,440 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 07:47:38,440 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 116 flow [2023-08-04 07:47:38,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 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 07:47:38,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:38,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:38,446 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 07:47:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:38,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:38,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1509788594, now seen corresponding path program 1 times [2023-08-04 07:47:38,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:38,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760021551] [2023-08-04 07:47:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:38,693 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 07:47:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760021551] [2023-08-04 07:47:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760021551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:38,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782815246] [2023-08-04 07:47:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:38,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:38,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:38,695 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 07:47:38,698 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 07:47:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:38,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:47:38,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:38,771 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 07:47:38,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:47:38,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782815246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:47:38,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:47:38,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:47:38,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758668114] [2023-08-04 07:47:38,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:47:38,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:47:38,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:47:38,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:47:38,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 07:47:38,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 07:47:38,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:38,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 07:47:38,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:39,081 INFO L124 PetriNetUnfolderBase]: 3169/4738 cut-off events. [2023-08-04 07:47:39,081 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-08-04 07:47:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9346 conditions, 4738 events. 3169/4738 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23033 event pairs, 1310 based on Foata normal form. 0/4480 useless extension candidates. Maximal degree in co-relation 2910. Up to 2655 conditions per place. [2023-08-04 07:47:39,115 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 38 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 07:47:39,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 222 flow [2023-08-04 07:47:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:47:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:47:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-04 07:47:39,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358649789029536 [2023-08-04 07:47:39,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-04 07:47:39,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-04 07:47:39,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:39,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-04 07:47:39,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 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 07:47:39,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:47:39,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:47:39,120 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 116 flow. Second operand 3 states and 381 transitions. [2023-08-04 07:47:39,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 222 flow [2023-08-04 07:47:39,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:47:39,124 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 126 flow [2023-08-04 07:47:39,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-04 07:47:39,125 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-04 07:47:39,125 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 126 flow [2023-08-04 07:47:39,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 07:47:39,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:39,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:39,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:47:39,333 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 07:47:39,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:39,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash 441194526, now seen corresponding path program 1 times [2023-08-04 07:47:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663093914] [2023-08-04 07:47:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:39,387 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 07:47:39,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:39,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663093914] [2023-08-04 07:47:39,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663093914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256435152] [2023-08-04 07:47:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:39,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:39,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:39,392 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 07:47:39,394 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 07:47:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:39,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:47:39,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:39,476 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 07:47:39,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:47:39,488 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 07:47:39,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256435152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:47:39,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:47:39,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:47:39,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423977559] [2023-08-04 07:47:39,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:47:39,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:47:39,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:47:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:47:39,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:47:39,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 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 07:47:39,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:39,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:47:39,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:39,766 INFO L124 PetriNetUnfolderBase]: 2557/3808 cut-off events. [2023-08-04 07:47:39,767 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2023-08-04 07:47:39,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7869 conditions, 3808 events. 2557/3808 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17627 event pairs, 690 based on Foata normal form. 3/3617 useless extension candidates. Maximal degree in co-relation 5074. Up to 3196 conditions per place. [2023-08-04 07:47:39,797 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 35 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 07:47:39,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 226 flow [2023-08-04 07:47:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:47:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:47:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-04 07:47:39,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168776371308017 [2023-08-04 07:47:39,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-04 07:47:39,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-04 07:47:39,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:39,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-04 07:47:39,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 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 07:47:39,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 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 07:47:39,803 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 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 07:47:39,803 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 126 flow. Second operand 4 states and 490 transitions. [2023-08-04 07:47:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 226 flow [2023-08-04 07:47:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:47:39,805 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 138 flow [2023-08-04 07:47:39,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-04 07:47:39,807 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-04 07:47:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 138 flow [2023-08-04 07:47:39,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 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 07:47:39,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:39,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:39,816 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 07:47:40,013 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 07:47:40,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:40,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2053648226, now seen corresponding path program 1 times [2023-08-04 07:47:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253400714] [2023-08-04 07:47:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:47:40,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253400714] [2023-08-04 07:47:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253400714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868686116] [2023-08-04 07:47:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:40,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:40,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:40,084 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 07:47:40,087 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 07:47:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:40,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:47:40,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:47:40,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:47:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:47:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868686116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:47:40,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:47:40,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:47:40,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265147689] [2023-08-04 07:47:40,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:47:40,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:47:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:47:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:47:40,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:47:40,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 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 07:47:40,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:40,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:47:40,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:40,457 INFO L124 PetriNetUnfolderBase]: 2269/3139 cut-off events. [2023-08-04 07:47:40,457 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 07:47:40,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6643 conditions, 3139 events. 2269/3139 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11856 event pairs, 508 based on Foata normal form. 27/3033 useless extension candidates. Maximal degree in co-relation 4601. Up to 1768 conditions per place. [2023-08-04 07:47:40,474 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 47 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 07:47:40,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 286 flow [2023-08-04 07:47:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:47:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:47:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-04 07:47:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2023-08-04 07:47:40,476 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-04 07:47:40,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-04 07:47:40,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:40,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-04 07:47:40,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 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 07:47:40,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 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 07:47:40,479 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 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 07:47:40,480 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 138 flow. Second operand 4 states and 502 transitions. [2023-08-04 07:47:40,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 286 flow [2023-08-04 07:47:40,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 279 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:47:40,481 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 145 flow [2023-08-04 07:47:40,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-04 07:47:40,482 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-04 07:47:40,483 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 145 flow [2023-08-04 07:47:40,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 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 07:47:40,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:40,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:40,489 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 07:47:40,689 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 07:47:40,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:40,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash 551738450, now seen corresponding path program 1 times [2023-08-04 07:47:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:40,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083404986] [2023-08-04 07:47:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:40,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083404986] [2023-08-04 07:47:40,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083404986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416383675] [2023-08-04 07:47:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:40,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:40,747 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 07:47:40,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 07:47:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:40,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:47:40,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:40,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:47:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:40,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416383675] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:47:40,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:47:40,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-04 07:47:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028707044] [2023-08-04 07:47:40,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:47:40,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 07:47:40,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 07:47:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 07:47:40,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:47:40,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 145 flow. Second operand has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 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 07:47:40,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:40,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:47:40,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:41,188 INFO L124 PetriNetUnfolderBase]: 2917/4003 cut-off events. [2023-08-04 07:47:41,188 INFO L125 PetriNetUnfolderBase]: For 1000/1000 co-relation queries the response was YES. [2023-08-04 07:47:41,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8865 conditions, 4003 events. 2917/4003 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15111 event pairs, 784 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 4151. Up to 1587 conditions per place. [2023-08-04 07:47:41,215 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 74 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-08-04 07:47:41,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 411 flow [2023-08-04 07:47:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 07:47:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 07:47:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-04 07:47:41,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 07:47:41,219 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-04 07:47:41,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-04 07:47:41,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:41,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-04 07:47:41,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 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 07:47:41,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 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 07:47:41,229 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 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 07:47:41,229 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 145 flow. Second operand 6 states and 758 transitions. [2023-08-04 07:47:41,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 411 flow [2023-08-04 07:47:41,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 404 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:47:41,236 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 174 flow [2023-08-04 07:47:41,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 07:47:41,237 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-08-04 07:47:41,237 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 174 flow [2023-08-04 07:47:41,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 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 07:47:41,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:41,238 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:41,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 07:47:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 07:47:41,444 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:41,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1001370, now seen corresponding path program 2 times [2023-08-04 07:47:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:41,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967658763] [2023-08-04 07:47:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:41,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:41,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967658763] [2023-08-04 07:47:41,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967658763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:41,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294878135] [2023-08-04 07:47:41,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:47:41,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:41,520 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:47:41,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 07:47:41,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:47:41,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:47:41,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 07:47:41,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:41,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:47:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:41,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294878135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:47:41,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:47:41,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-04 07:47:41,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806587933] [2023-08-04 07:47:41,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:47:41,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 07:47:41,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 07:47:41,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-04 07:47:41,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:47:41,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 174 flow. Second operand has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 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 07:47:41,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:41,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:47:41,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:42,260 INFO L124 PetriNetUnfolderBase]: 4861/6433 cut-off events. [2023-08-04 07:47:42,261 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-04 07:47:42,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15420 conditions, 6433 events. 4861/6433 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 22804 event pairs, 784 based on Foata normal form. 486/6846 useless extension candidates. Maximal degree in co-relation 6011. Up to 1587 conditions per place. [2023-08-04 07:47:42,300 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 146 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2023-08-04 07:47:42,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 171 transitions, 764 flow [2023-08-04 07:47:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 07:47:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 07:47:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1517 transitions. [2023-08-04 07:47:42,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334036568213784 [2023-08-04 07:47:42,305 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1517 transitions. [2023-08-04 07:47:42,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1517 transitions. [2023-08-04 07:47:42,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:42,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1517 transitions. [2023-08-04 07:47:42,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.41666666666667) internal successors, (1517), 12 states have internal predecessors, (1517), 0 states have call successors, (0), 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 07:47:42,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 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 07:47:42,316 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 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 07:47:42,317 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 174 flow. Second operand 12 states and 1517 transitions. [2023-08-04 07:47:42,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 171 transitions, 764 flow [2023-08-04 07:47:42,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 171 transitions, 750 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 07:47:42,325 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 244 flow [2023-08-04 07:47:42,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2023-08-04 07:47:42,326 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 07:47:42,327 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 244 flow [2023-08-04 07:47:42,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 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 07:47:42,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:42,327 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:42,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 07:47:42,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:42,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:42,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -606565222, now seen corresponding path program 3 times [2023-08-04 07:47:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175747172] [2023-08-04 07:47:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:42,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:42,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175747172] [2023-08-04 07:47:42,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175747172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:42,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100041470] [2023-08-04 07:47:42,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:47:42,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:42,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:47:42,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 07:47:42,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-04 07:47:42,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:47:42,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 07:47:42,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:42,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:47:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:42,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100041470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:47:42,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:47:42,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-08-04 07:47:42,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191255385] [2023-08-04 07:47:42,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:47:42,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:47:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:47:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:47:42,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:47:42,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 244 flow. Second operand has 15 states, 15 states have (on average 114.8) internal successors, (1722), 15 states have internal predecessors, (1722), 0 states have call successors, (0), 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 07:47:42,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:42,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:47:42,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:43,739 INFO L124 PetriNetUnfolderBase]: 5509/7243 cut-off events. [2023-08-04 07:47:43,741 INFO L125 PetriNetUnfolderBase]: For 9187/9187 co-relation queries the response was YES. [2023-08-04 07:47:43,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18910 conditions, 7243 events. 5509/7243 cut-off events. For 9187/9187 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 25388 event pairs, 784 based on Foata normal form. 162/7332 useless extension candidates. Maximal degree in co-relation 12491. Up to 1587 conditions per place. [2023-08-04 07:47:43,793 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 170 selfloop transitions, 13 changer transitions 0/197 dead transitions. [2023-08-04 07:47:43,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 197 transitions, 914 flow [2023-08-04 07:47:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 07:47:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 07:47:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1765 transitions. [2023-08-04 07:47:43,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319469559975889 [2023-08-04 07:47:43,798 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1765 transitions. [2023-08-04 07:47:43,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1765 transitions. [2023-08-04 07:47:43,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:43,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1765 transitions. [2023-08-04 07:47:43,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.07142857142857) internal successors, (1765), 14 states have internal predecessors, (1765), 0 states have call successors, (0), 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 07:47:43,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 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 07:47:43,809 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 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 07:47:43,809 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 244 flow. Second operand 14 states and 1765 transitions. [2023-08-04 07:47:43,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 197 transitions, 914 flow [2023-08-04 07:47:43,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 197 transitions, 862 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-08-04 07:47:43,830 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 244 flow [2023-08-04 07:47:43,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=244, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2023-08-04 07:47:43,831 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2023-08-04 07:47:43,831 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 244 flow [2023-08-04 07:47:43,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.8) internal successors, (1722), 15 states have internal predecessors, (1722), 0 states have call successors, (0), 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 07:47:43,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:47:43,832 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:47:43,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 07:47:44,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 07:47:44,039 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:47:44,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:47:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1206395802, now seen corresponding path program 4 times [2023-08-04 07:47:44,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:47:44,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599461017] [2023-08-04 07:47:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:47:44,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:47:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:47:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:44,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:47:44,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599461017] [2023-08-04 07:47:44,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599461017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:47:44,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584389222] [2023-08-04 07:47:44,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 07:47:44,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:47:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:47:44,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:47:44,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 07:47:44,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 07:47:44,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:47:44,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 07:47:44,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:47:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:45,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:47:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:47:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584389222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:47:46,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:47:46,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-04 07:47:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642426641] [2023-08-04 07:47:46,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:47:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-04 07:47:46,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:47:46,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-04 07:47:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2023-08-04 07:47:46,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 237 [2023-08-04 07:47:46,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 244 flow. Second operand has 41 states, 41 states have (on average 107.7560975609756) internal successors, (4418), 41 states have internal predecessors, (4418), 0 states have call successors, (0), 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 07:47:46,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:47:46,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 237 [2023-08-04 07:47:46,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:49:55,993 INFO L124 PetriNetUnfolderBase]: 913808/1231453 cut-off events. [2023-08-04 07:49:55,993 INFO L125 PetriNetUnfolderBase]: For 2166946/2166946 co-relation queries the response was YES. [2023-08-04 07:50:04,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185708 conditions, 1231453 events. 913808/1231453 cut-off events. For 2166946/2166946 co-relation queries the response was YES. Maximal size of possible extension queue 27477. Compared 9823374 event pairs, 3390 based on Foata normal form. 4084/1235527 useless extension candidates. Maximal degree in co-relation 2249100. Up to 111512 conditions per place. [2023-08-04 07:50:12,959 INFO L140 encePairwiseOnDemand]: 230/237 looper letters, 1953 selfloop transitions, 1537 changer transitions 0/3500 dead transitions. [2023-08-04 07:50:12,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 3500 transitions, 21406 flow [2023-08-04 07:50:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-08-04 07:50:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2023-08-04 07:50:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 19809 transitions. [2023-08-04 07:50:13,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191445868385879 [2023-08-04 07:50:13,027 INFO L72 ComplementDD]: Start complementDD. Operand 161 states and 19809 transitions. [2023-08-04 07:50:13,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 161 states and 19809 transitions. [2023-08-04 07:50:13,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:13,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 161 states and 19809 transitions. [2023-08-04 07:50:13,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 162 states, 161 states have (on average 123.03726708074534) internal successors, (19809), 161 states have internal predecessors, (19809), 0 states have call successors, (0), 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 07:50:13,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 162 states, 162 states have (on average 237.0) internal successors, (38394), 162 states have internal predecessors, (38394), 0 states have call successors, (0), 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 07:50:13,176 INFO L81 ComplementDD]: Finished complementDD. Result has 162 states, 162 states have (on average 237.0) internal successors, (38394), 162 states have internal predecessors, (38394), 0 states have call successors, (0), 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 07:50:13,176 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 244 flow. Second operand 161 states and 19809 transitions. [2023-08-04 07:50:13,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 3500 transitions, 21406 flow