/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-12_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:05:32,380 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:05:32,453 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:05:32,458 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:05:32,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:05:32,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:05:32,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:05:32,475 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:05:32,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:05:32,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:05:32,476 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:05:32,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:05:32,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:05:32,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:05:32,478 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:05:32,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:05:32,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:05:32,479 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:05:32,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:05:32,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:05:32,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:05:32,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:05:32,485 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:05:32,485 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:05:32,485 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:05:32,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:05:32,485 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:05:32,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:05:32,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:05:32,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:05:32,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:05:32,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:05:32,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:05:32,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:05:32,487 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:05:32,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:05:32,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:05:32,488 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:05:32,488 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:05:32,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:05:32,489 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:05:32,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:05:32,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:05:32,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:05:32,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:05:32,736 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:05:32,737 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:05:32,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-12_bound2.i [2023-08-03 19:05:33,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:05:34,174 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:05:34,174 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-12_bound2.i [2023-08-03 19:05:34,188 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6c52beb/975a274b2e1240f1abede4028b96d25d/FLAG1414970ba [2023-08-03 19:05:34,200 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6c52beb/975a274b2e1240f1abede4028b96d25d [2023-08-03 19:05:34,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:05:34,203 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:05:34,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:05:34,211 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:05:34,214 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:05:34,215 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3644c064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34, skipping insertion in model container [2023-08-03 19:05:34,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,263 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:05:34,558 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-12_bound2.i[30243,30256] [2023-08-03 19:05:34,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:05:34,595 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:05:34,621 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [229] [2023-08-03 19:05:34,622 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [230] [2023-08-03 19:05:34,644 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-12_bound2.i[30243,30256] [2023-08-03 19:05:34,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:05:34,683 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 19:05:34,683 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 19:05:34,689 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:05:34,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34 WrapperNode [2023-08-03 19:05:34,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:05:34,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:05:34,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:05:34,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:05:34,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,724 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,750 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-08-03 19:05:34,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:05:34,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:05:34,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:05:34,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:05:34,758 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,778 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:05:34,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:05:34,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:05:34,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:05:34,787 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (1/1) ... [2023-08-03 19:05:34,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:05:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:34,820 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) [2023-08-03 19:05:34,827 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 [2023-08-03 19:05:34,852 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:05:34,852 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:05:34,852 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:05:34,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:05:34,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:05:34,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 19:05:34,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:05:34,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:05:34,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:05:34,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:05:34,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 19:05:34,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:05:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:05:34,857 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 19:05:35,002 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:05:35,003 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:05:35,157 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:05:35,163 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:05:35,163 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-03 19:05:35,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:05:35 BoogieIcfgContainer [2023-08-03 19:05:35,165 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:05:35,167 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:05:35,167 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:05:35,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:05:35,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:05:34" (1/3) ... [2023-08-03 19:05:35,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a729323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:05:35, skipping insertion in model container [2023-08-03 19:05:35,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:05:34" (2/3) ... [2023-08-03 19:05:35,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a729323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:05:35, skipping insertion in model container [2023-08-03 19:05:35,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:05:35" (3/3) ... [2023-08-03 19:05:35,173 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_fib_unsafe-12_bound2.i [2023-08-03 19:05:35,179 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:05:35,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:05:35,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:05:35,186 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:05:35,251 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 19:05:35,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-03 19:05:35,361 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-03 19:05:35,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:05:35,367 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. [2023-08-03 19:05:35,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-03 19:05:35,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-03 19:05:35,374 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:05:35,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-03 19:05:35,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-03 19:05:35,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-03 19:05:35,431 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-03 19:05:35,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:05:35,433 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. [2023-08-03 19:05:35,436 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-03 19:05:38,532 INFO L134 LiptonReduction]: Checked pairs total: 2006 [2023-08-03 19:05:38,532 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-03 19:05:38,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:05:38,550 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;@667ffa1e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:05:38,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:05:38,555 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:05:38,555 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-03 19:05:38,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:05:38,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:38,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 19:05:38,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:38,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 12905250, now seen corresponding path program 1 times [2023-08-03 19:05:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426679718] [2023-08-03 19:05:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:05:38,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:38,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426679718] [2023-08-03 19:05:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426679718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:05:38,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:05:38,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:05:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428520651] [2023-08-03 19:05:38,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:05:38,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:05:38,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:38,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:05:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:05:38,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-03 19:05:38,819 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) [2023-08-03 19:05:38,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:38,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-03 19:05:38,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:38,887 INFO L124 PetriNetUnfolderBase]: 136/222 cut-off events. [2023-08-03 19:05:38,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:05:38,888 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. [2023-08-03 19:05:38,890 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 19 selfloop transitions, 2 changer transitions 1/24 dead transitions. [2023-08-03 19:05:38,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 102 flow [2023-08-03 19:05:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:05:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:05:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-03 19:05:38,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864433811802233 [2023-08-03 19:05:38,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-03 19:05:38,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-03 19:05:38,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:38,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-03 19:05:38,910 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) [2023-08-03 19:05:38,914 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) [2023-08-03 19:05:38,915 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) [2023-08-03 19:05:38,916 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 50 flow. Second operand 3 states and 305 transitions. [2023-08-03 19:05:38,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 102 flow [2023-08-03 19:05:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:05:38,920 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 56 flow [2023-08-03 19:05:38,921 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=56, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-03 19:05:38,924 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-03 19:05:38,924 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 56 flow [2023-08-03 19:05:38,925 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) [2023-08-03 19:05:38,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:38,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:05:38,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:05:38,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:38,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash -465714586, now seen corresponding path program 1 times [2023-08-03 19:05:38,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:38,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210969539] [2023-08-03 19:05:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:05:38,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:05:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:05:38,989 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:05:38,990 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:05:38,991 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 19:05:38,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 19:05:38,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:05:38,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:05:38,996 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 19:05:38,998 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:05:38,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:05:39,039 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 19:05:39,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-03 19:05:39,108 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-03 19:05:39,108 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:05:39,113 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. [2023-08-03 19:05:39,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-03 19:05:39,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-03 19:05:39,117 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:05:39,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-03 19:05:39,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-03 19:05:39,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-03 19:05:39,161 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-03 19:05:39,161 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:05:39,163 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. [2023-08-03 19:05:39,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-03 19:05:41,758 INFO L134 LiptonReduction]: Checked pairs total: 12612 [2023-08-03 19:05:41,758 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-03 19:05:41,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:05:41,768 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;@667ffa1e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:05:41,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:05:41,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:05:41,771 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-03 19:05:41,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:05:41,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:41,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 19:05:41,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:41,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash 20942910, now seen corresponding path program 1 times [2023-08-03 19:05:41,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:41,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354605437] [2023-08-03 19:05:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:05:41,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:41,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354605437] [2023-08-03 19:05:41,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354605437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:05:41,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:05:41,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:05:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561687550] [2023-08-03 19:05:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:05:41,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:05:41,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:05:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:05:41,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-03 19:05:41,881 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) [2023-08-03 19:05:41,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:41,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-03 19:05:41,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:42,277 INFO L124 PetriNetUnfolderBase]: 3244/5230 cut-off events. [2023-08-03 19:05:42,278 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-03 19:05:42,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9663 conditions, 5230 events. 3244/5230 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29355 event pairs, 1386 based on Foata normal form. 0/4639 useless extension candidates. Maximal degree in co-relation 3014. Up to 4201 conditions per place. [2023-08-03 19:05:42,312 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 28 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-03 19:05:42,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 180 flow [2023-08-03 19:05:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:05:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:05:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-03 19:05:42,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260196905766527 [2023-08-03 19:05:42,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-03 19:05:42,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-03 19:05:42,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:42,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-03 19:05:42,320 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) [2023-08-03 19:05:42,323 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) [2023-08-03 19:05:42,324 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) [2023-08-03 19:05:42,324 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 3 states and 374 transitions. [2023-08-03 19:05:42,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 180 flow [2023-08-03 19:05:42,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 19:05:42,327 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2023-08-03 19:05:42,327 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=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-03 19:05:42,328 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-03 19:05:42,328 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2023-08-03 19:05:42,329 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) [2023-08-03 19:05:42,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:42,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:42,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 19:05:42,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:42,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash 659291704, now seen corresponding path program 1 times [2023-08-03 19:05:42,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:42,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238757075] [2023-08-03 19:05:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:42,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:05:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:42,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238757075] [2023-08-03 19:05:42,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238757075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:42,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075871254] [2023-08-03 19:05:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:42,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:42,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:42,437 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) [2023-08-03 19:05:42,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 19:05:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:42,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:05:42,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:05:42,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:05:42,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075871254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:05:42,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:05:42,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 19:05:42,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863134437] [2023-08-03 19:05:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:05:42,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:05:42,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:05:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:05:42,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-03 19:05:42,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 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) [2023-08-03 19:05:42,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:42,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-03 19:05:42,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:42,856 INFO L124 PetriNetUnfolderBase]: 2665/4177 cut-off events. [2023-08-03 19:05:42,857 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-03 19:05:42,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 4177 events. 2665/4177 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21236 event pairs, 1120 based on Foata normal form. 0/3827 useless extension candidates. Maximal degree in co-relation 7803. Up to 3271 conditions per place. [2023-08-03 19:05:42,882 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-03 19:05:42,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 210 flow [2023-08-03 19:05:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:05:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:05:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-03 19:05:42,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-03 19:05:42,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-03 19:05:42,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-03 19:05:42,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:42,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-03 19:05:42,886 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) [2023-08-03 19:05:42,888 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) [2023-08-03 19:05:42,888 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) [2023-08-03 19:05:42,889 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 3 states and 379 transitions. [2023-08-03 19:05:42,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 210 flow [2023-08-03 19:05:42,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:05:42,893 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 124 flow [2023-08-03 19:05:42,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=124, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-03 19:05:42,895 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-03 19:05:42,895 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 124 flow [2023-08-03 19:05:42,895 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) [2023-08-03 19:05:42,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:42,895 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:05:42,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:43,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:43,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:43,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash 479947437, now seen corresponding path program 1 times [2023-08-03 19:05:43,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:43,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273663978] [2023-08-03 19:05:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:43,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:05:43,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:43,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273663978] [2023-08-03 19:05:43,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273663978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:43,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484925838] [2023-08-03 19:05:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:43,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:43,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:43,198 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) [2023-08-03 19:05:43,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 19:05:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:43,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:05:43,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:05:43,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:05:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484925838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:05:43,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:05:43,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:05:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134342639] [2023-08-03 19:05:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:05:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:05:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:05:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:05:43,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:43,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:43,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:43,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:43,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:43,685 INFO L124 PetriNetUnfolderBase]: 2647/4168 cut-off events. [2023-08-03 19:05:43,685 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-08-03 19:05:43,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8137 conditions, 4168 events. 2647/4168 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 21528 event pairs, 744 based on Foata normal form. 9/3968 useless extension candidates. Maximal degree in co-relation 2506. Up to 3381 conditions per place. [2023-08-03 19:05:43,715 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 34 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-03 19:05:43,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 223 flow [2023-08-03 19:05:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:05:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:05:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-08-03 19:05:43,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088607594936709 [2023-08-03 19:05:43,718 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-08-03 19:05:43,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-08-03 19:05:43,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:43,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-08-03 19:05:43,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:43,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:43,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:43,722 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 124 flow. Second operand 5 states and 603 transitions. [2023-08-03 19:05:43,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 223 flow [2023-08-03 19:05:43,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 19:05:43,724 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 140 flow [2023-08-03 19:05:43,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-03 19:05:43,725 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-08-03 19:05:43,725 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 140 flow [2023-08-03 19:05:43,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:43,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:43,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:43,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:43,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:43,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1771737091, now seen corresponding path program 1 times [2023-08-03 19:05:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979573572] [2023-08-03 19:05:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:05:43,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979573572] [2023-08-03 19:05:43,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979573572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884688833] [2023-08-03 19:05:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:43,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:43,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:43,978 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) [2023-08-03 19:05:43,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 19:05:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:44,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:05:44,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:05:44,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:05:44,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884688833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:05:44,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:05:44,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-03 19:05:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146302145] [2023-08-03 19:05:44,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:05:44,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:05:44,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:44,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:05:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:05:44,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-03 19:05:44,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 140 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) [2023-08-03 19:05:44,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:44,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-03 19:05:44,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:44,417 INFO L124 PetriNetUnfolderBase]: 3151/4723 cut-off events. [2023-08-03 19:05:44,417 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-03 19:05:44,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9346 conditions, 4723 events. 3151/4723 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23183 event pairs, 1298 based on Foata normal form. 0/4480 useless extension candidates. Maximal degree in co-relation 2896. Up to 2628 conditions per place. [2023-08-03 19:05:44,446 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 39 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-03 19:05:44,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 248 flow [2023-08-03 19:05:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:05:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:05:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-03 19:05:44,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358649789029536 [2023-08-03 19:05:44,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-03 19:05:44,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-03 19:05:44,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:44,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-03 19:05:44,449 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) [2023-08-03 19:05:44,450 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) [2023-08-03 19:05:44,451 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) [2023-08-03 19:05:44,451 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 140 flow. Second operand 3 states and 381 transitions. [2023-08-03 19:05:44,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 248 flow [2023-08-03 19:05:44,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 241 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:05:44,454 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 145 flow [2023-08-03 19:05:44,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-03 19:05:44,456 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-03 19:05:44,457 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 145 flow [2023-08-03 19:05:44,457 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) [2023-08-03 19:05:44,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:44,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:44,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:44,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:44,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:44,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 910725763, now seen corresponding path program 1 times [2023-08-03 19:05:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770839763] [2023-08-03 19:05:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:05:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:44,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770839763] [2023-08-03 19:05:44,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770839763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543431747] [2023-08-03 19:05:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:44,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:44,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:44,702 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) [2023-08-03 19:05:44,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 19:05:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:44,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:05:44,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:05:44,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:05:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:05:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543431747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:05:44,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:05:44,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 19:05:44,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310211318] [2023-08-03 19:05:44,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:05:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:05:44,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:05:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:05:44,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:44,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 145 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) [2023-08-03 19:05:44,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:44,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:44,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:45,099 INFO L124 PetriNetUnfolderBase]: 2539/3799 cut-off events. [2023-08-03 19:05:45,100 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-03 19:05:45,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7886 conditions, 3799 events. 2539/3799 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17857 event pairs, 684 based on Foata normal form. 3/3617 useless extension candidates. Maximal degree in co-relation 5090. Up to 3196 conditions per place. [2023-08-03 19:05:45,123 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-03 19:05:45,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 235 flow [2023-08-03 19:05:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:05:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:05:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-03 19:05:45,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158227848101266 [2023-08-03 19:05:45,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-03 19:05:45,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-03 19:05:45,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:45,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-03 19:05:45,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:45,129 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) [2023-08-03 19:05:45,129 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) [2023-08-03 19:05:45,129 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 145 flow. Second operand 4 states and 489 transitions. [2023-08-03 19:05:45,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 235 flow [2023-08-03 19:05:45,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:05:45,132 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 141 flow [2023-08-03 19:05:45,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-03 19:05:45,133 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-03 19:05:45,133 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 141 flow [2023-08-03 19:05:45,134 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) [2023-08-03 19:05:45,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:45,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:45,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:45,343 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 [2023-08-03 19:05:45,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:45,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2021396342, now seen corresponding path program 1 times [2023-08-03 19:05:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:45,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727952617] [2023-08-03 19:05:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:05:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:45,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727952617] [2023-08-03 19:05:45,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727952617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:45,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867703328] [2023-08-03 19:05:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:45,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:45,406 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) [2023-08-03 19:05:45,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 19:05:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:45,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:05:45,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:05:45,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:05:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:05:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867703328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:05:45,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:05:45,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:05:45,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244740981] [2023-08-03 19:05:45,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:05:45,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:05:45,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:05:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:05:45,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:45,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 141 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) [2023-08-03 19:05:45,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:45,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:45,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:45,773 INFO L124 PetriNetUnfolderBase]: 2269/3166 cut-off events. [2023-08-03 19:05:45,774 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-03 19:05:45,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 3166 events. 2269/3166 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12223 event pairs, 508 based on Foata normal form. 27/3069 useless extension candidates. Maximal degree in co-relation 4658. Up to 1768 conditions per place. [2023-08-03 19:05:45,796 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 47 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-03 19:05:45,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 289 flow [2023-08-03 19:05:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:05:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:05:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-03 19:05:45,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2023-08-03 19:05:45,798 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-03 19:05:45,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-03 19:05:45,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:45,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-03 19:05:45,800 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) [2023-08-03 19:05:45,801 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) [2023-08-03 19:05:45,802 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) [2023-08-03 19:05:45,802 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 141 flow. Second operand 4 states and 502 transitions. [2023-08-03 19:05:45,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 289 flow [2023-08-03 19:05:45,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 283 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:05:45,805 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 155 flow [2023-08-03 19:05:45,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-08-03 19:05:45,806 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-08-03 19:05:45,806 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 155 flow [2023-08-03 19:05:45,806 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) [2023-08-03 19:05:45,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:45,806 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:45,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:46,015 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 [2023-08-03 19:05:46,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:46,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash 535273550, now seen corresponding path program 1 times [2023-08-03 19:05:46,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:46,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814689107] [2023-08-03 19:05:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:05:46,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:46,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814689107] [2023-08-03 19:05:46,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814689107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:46,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131229050] [2023-08-03 19:05:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:46,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:46,118 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) [2023-08-03 19:05:46,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 19:05:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:46,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:05:46,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:05:46,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:05:46,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131229050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:05:46,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:05:46,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 19:05:46,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816060073] [2023-08-03 19:05:46,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:05:46,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:05:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:05:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:05:46,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:46,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:46,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:46,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:46,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:46,442 INFO L124 PetriNetUnfolderBase]: 1945/2653 cut-off events. [2023-08-03 19:05:46,442 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-08-03 19:05:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 2653 events. 1945/2653 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9146 event pairs, 22 based on Foata normal form. 81/2610 useless extension candidates. Maximal degree in co-relation 4025. Up to 1701 conditions per place. [2023-08-03 19:05:46,458 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 53 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-03 19:05:46,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 315 flow [2023-08-03 19:05:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:05:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:05:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2023-08-03 19:05:46,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232067510548524 [2023-08-03 19:05:46,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 620 transitions. [2023-08-03 19:05:46,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 620 transitions. [2023-08-03 19:05:46,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:46,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 620 transitions. [2023-08-03 19:05:46,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:46,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:46,464 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:46,464 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 155 flow. Second operand 5 states and 620 transitions. [2023-08-03 19:05:46,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 315 flow [2023-08-03 19:05:46,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 308 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 19:05:46,467 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 144 flow [2023-08-03 19:05:46,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=5, PETRI_FLOW=144, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-08-03 19:05:46,468 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-08-03 19:05:46,468 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 144 flow [2023-08-03 19:05:46,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:46,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:46,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:46,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:46,673 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 [2023-08-03 19:05:46,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:46,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:46,674 INFO L85 PathProgramCache]: Analyzing trace with hash -586395900, now seen corresponding path program 1 times [2023-08-03 19:05:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:46,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473206971] [2023-08-03 19:05:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:46,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:46,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473206971] [2023-08-03 19:05:46,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473206971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64141216] [2023-08-03 19:05:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:46,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:46,717 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) [2023-08-03 19:05:46,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 19:05:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:46,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:05:46,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:46,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:05:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:46,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64141216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:05:46,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:05:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-03 19:05:46,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245146129] [2023-08-03 19:05:46,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:05:46,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 19:05:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 19:05:46,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 19:05:46,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:46,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 144 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) [2023-08-03 19:05:46,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:46,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:46,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:47,136 INFO L124 PetriNetUnfolderBase]: 2917/4003 cut-off events. [2023-08-03 19:05:47,137 INFO L125 PetriNetUnfolderBase]: For 955/955 co-relation queries the response was YES. [2023-08-03 19:05:47,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8819 conditions, 4003 events. 2917/4003 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15112 event pairs, 784 based on Foata normal form. 0/3858 useless extension candidates. Maximal degree in co-relation 4106. Up to 1587 conditions per place. [2023-08-03 19:05:47,163 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 74 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-08-03 19:05:47,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 93 transitions, 410 flow [2023-08-03 19:05:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:05:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:05:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-03 19:05:47,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-03 19:05:47,166 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-03 19:05:47,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-03 19:05:47,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:47,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-03 19:05:47,168 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) [2023-08-03 19:05:47,170 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) [2023-08-03 19:05:47,170 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) [2023-08-03 19:05:47,170 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 144 flow. Second operand 6 states and 758 transitions. [2023-08-03 19:05:47,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 93 transitions, 410 flow [2023-08-03 19:05:47,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 93 transitions, 405 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:05:47,173 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 175 flow [2023-08-03 19:05:47,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=175, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-08-03 19:05:47,174 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2023-08-03 19:05:47,174 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 175 flow [2023-08-03 19:05:47,174 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) [2023-08-03 19:05:47,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:47,175 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:47,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:47,379 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 [2023-08-03 19:05:47,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:47,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1687533220, now seen corresponding path program 2 times [2023-08-03 19:05:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120112448] [2023-08-03 19:05:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:47,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120112448] [2023-08-03 19:05:47,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120112448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165040030] [2023-08-03 19:05:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:05:47,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:47,463 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) [2023-08-03 19:05:47,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 19:05:47,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:05:47,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:05:47,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 19:05:47,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:47,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:05:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:47,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165040030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:05:47,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:05:47,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-03 19:05:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607358887] [2023-08-03 19:05:47,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:05:47,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 19:05:47,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 19:05:47,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-03 19:05:47,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:47,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 175 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) [2023-08-03 19:05:47,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:47,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:47,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:48,182 INFO L124 PetriNetUnfolderBase]: 4861/6433 cut-off events. [2023-08-03 19:05:48,182 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-03 19:05:48,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15510 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 22810 event pairs, 784 based on Foata normal form. 486/6855 useless extension candidates. Maximal degree in co-relation 6100. Up to 1587 conditions per place. [2023-08-03 19:05:48,223 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 146 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2023-08-03 19:05:48,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 171 transitions, 765 flow [2023-08-03 19:05:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 19:05:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 19:05:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1517 transitions. [2023-08-03 19:05:48,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334036568213784 [2023-08-03 19:05:48,228 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1517 transitions. [2023-08-03 19:05:48,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1517 transitions. [2023-08-03 19:05:48,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:48,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1517 transitions. [2023-08-03 19:05:48,231 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) [2023-08-03 19:05:48,236 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) [2023-08-03 19:05:48,237 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) [2023-08-03 19:05:48,237 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 175 flow. Second operand 12 states and 1517 transitions. [2023-08-03 19:05:48,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 171 transitions, 765 flow [2023-08-03 19:05:48,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 171 transitions, 751 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 19:05:48,248 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 245 flow [2023-08-03 19:05:48,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=245, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-08-03 19:05:48,249 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-08-03 19:05:48,249 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 245 flow [2023-08-03 19:05:48,250 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) [2023-08-03 19:05:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:48,250 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:48,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 19:05:48,455 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 [2023-08-03 19:05:48,456 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:48,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1621563300, now seen corresponding path program 3 times [2023-08-03 19:05:48,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:48,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124455046] [2023-08-03 19:05:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:48,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:48,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:48,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124455046] [2023-08-03 19:05:48,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124455046] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:48,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086369217] [2023-08-03 19:05:48,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 19:05:48,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:48,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:48,629 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) [2023-08-03 19:05:48,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 19:05:48,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-03 19:05:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:05:48,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-03 19:05:48,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:48,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:05:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086369217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:05:48,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:05:48,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-03 19:05:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118170148] [2023-08-03 19:05:48,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:05:48,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-03 19:05:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-03 19:05:48,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-03 19:05:48,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:48,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 245 flow. Second operand has 25 states, 25 states have (on average 114.44) internal successors, (2861), 25 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:48,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:48,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:48,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:50,117 INFO L124 PetriNetUnfolderBase]: 8749/11293 cut-off events. [2023-08-03 19:05:50,117 INFO L125 PetriNetUnfolderBase]: For 38347/38347 co-relation queries the response was YES. [2023-08-03 19:05:50,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29530 conditions, 11293 events. 8749/11293 cut-off events. For 38347/38347 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 38208 event pairs, 784 based on Foata normal form. 972/12201 useless extension candidates. Maximal degree in co-relation 12580. Up to 1702 conditions per place. [2023-08-03 19:05:50,182 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 290 selfloop transitions, 23 changer transitions 0/327 dead transitions. [2023-08-03 19:05:50,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 327 transitions, 1495 flow [2023-08-03 19:05:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-03 19:05:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-03 19:05:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3035 transitions. [2023-08-03 19:05:50,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335794655414908 [2023-08-03 19:05:50,190 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3035 transitions. [2023-08-03 19:05:50,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3035 transitions. [2023-08-03 19:05:50,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:50,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3035 transitions. [2023-08-03 19:05:50,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 126.45833333333333) internal successors, (3035), 24 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:50,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 237.0) internal successors, (5925), 25 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:50,207 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 237.0) internal successors, (5925), 25 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:50,207 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 245 flow. Second operand 24 states and 3035 transitions. [2023-08-03 19:05:50,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 327 transitions, 1495 flow [2023-08-03 19:05:50,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 327 transitions, 1423 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-08-03 19:05:50,237 INFO L231 Difference]: Finished difference. Result has 109 places, 63 transitions, 365 flow [2023-08-03 19:05:50,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=24, PETRI_FLOW=365, PETRI_PLACES=109, PETRI_TRANSITIONS=63} [2023-08-03 19:05:50,237 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2023-08-03 19:05:50,238 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 63 transitions, 365 flow [2023-08-03 19:05:50,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 114.44) internal successors, (2861), 25 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:50,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:50,239 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:50,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 19:05:50,445 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 [2023-08-03 19:05:50,445 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:50,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:50,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1737254492, now seen corresponding path program 4 times [2023-08-03 19:05:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014912608] [2023-08-03 19:05:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:51,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014912608] [2023-08-03 19:05:51,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014912608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554585381] [2023-08-03 19:05:51,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 19:05:51,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:51,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:51,072 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) [2023-08-03 19:05:51,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 19:05:51,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 19:05:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:05:51,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-03 19:05:51,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:51,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:05:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:51,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554585381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:05:51,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:05:51,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2023-08-03 19:05:51,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074960846] [2023-08-03 19:05:51,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:05:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-03 19:05:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-03 19:05:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-08-03 19:05:51,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-03 19:05:51,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 63 transitions, 365 flow. Second operand has 29 states, 29 states have (on average 114.41379310344827) internal successors, (3318), 29 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:51,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:05:51,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-03 19:05:51,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:05:53,051 INFO L124 PetriNetUnfolderBase]: 10045/12913 cut-off events. [2023-08-03 19:05:53,051 INFO L125 PetriNetUnfolderBase]: For 84517/84517 co-relation queries the response was YES. [2023-08-03 19:05:53,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34726 conditions, 12913 events. 10045/12913 cut-off events. For 84517/84517 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 43362 event pairs, 784 based on Foata normal form. 324/13173 useless extension candidates. Maximal degree in co-relation 25216. Up to 1704 conditions per place. [2023-08-03 19:05:53,145 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 338 selfloop transitions, 27 changer transitions 0/379 dead transitions. [2023-08-03 19:05:53,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 379 transitions, 1751 flow [2023-08-03 19:05:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-03 19:05:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-03 19:05:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3531 transitions. [2023-08-03 19:05:53,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320976491862568 [2023-08-03 19:05:53,155 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3531 transitions. [2023-08-03 19:05:53,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3531 transitions. [2023-08-03 19:05:53,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:05:53,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3531 transitions. [2023-08-03 19:05:53,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 126.10714285714286) internal successors, (3531), 28 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:53,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 237.0) internal successors, (6873), 29 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:53,177 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 237.0) internal successors, (6873), 29 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:53,178 INFO L175 Difference]: Start difference. First operand has 109 places, 63 transitions, 365 flow. Second operand 28 states and 3531 transitions. [2023-08-03 19:05:53,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 379 transitions, 1751 flow [2023-08-03 19:05:53,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 379 transitions, 1647 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-08-03 19:05:53,240 INFO L231 Difference]: Finished difference. Result has 129 places, 67 transitions, 365 flow [2023-08-03 19:05:53,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=365, PETRI_PLACES=129, PETRI_TRANSITIONS=67} [2023-08-03 19:05:53,241 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2023-08-03 19:05:53,241 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 67 transitions, 365 flow [2023-08-03 19:05:53,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.41379310344827) internal successors, (3318), 29 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:05:53,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:05:53,242 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:05:53,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-03 19:05:53,447 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 [2023-08-03 19:05:53,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:05:53,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:05:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1699975260, now seen corresponding path program 5 times [2023-08-03 19:05:53,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:05:53,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233756189] [2023-08-03 19:05:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:05:53,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:05:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:05:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:55,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:05:55,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233756189] [2023-08-03 19:05:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233756189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:05:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294420661] [2023-08-03 19:05:55,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-03 19:05:55,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:05:55,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:05:55,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:05:55,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 19:05:55,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-08-03 19:05:55,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:05:55,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-03 19:05:55,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:05:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:57,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:05:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:05:59,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294420661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:05:59,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:05:59,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2023-08-03 19:05:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073950181] [2023-08-03 19:05:59,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:05:59,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-08-03 19:05:59,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:05:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-08-03 19:05:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=5620, Unknown=0, NotChecked=0, Total=6806 [2023-08-03 19:06:01,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 237 [2023-08-03 19:06:01,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 67 transitions, 365 flow. Second operand has 83 states, 83 states have (on average 107.37349397590361) internal successors, (8912), 83 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:06:01,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:06:01,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 237 [2023-08-03 19:06:01,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand