/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_triangular-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:17:23,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:17:23,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:17:23,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:17:23,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:17:23,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:17:23,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:17:23,457 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:17:23,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:17:23,462 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:17:23,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:17:23,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:17:23,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:17:23,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:17:23,465 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:17:23,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:17:23,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:17:23,466 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:17:23,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:17:23,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:17:23,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:17:23,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:17:23,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:17:23,468 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:17:23,468 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:17:23,468 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:17:23,468 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:17:23,469 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:17:23,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:17:23,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:17:23,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:17:23,470 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:17:23,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:17:23,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:17:23,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:17:23,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:17:23,471 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:17:23,471 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:17:23,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:17:23,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:17:23,472 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:17:23,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:17:23,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:17:23,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:17:23,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:17:23,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:17:23,711 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:17:23,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_triangular-2_bound2.i [2023-08-03 19:17:24,952 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:17:25,172 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:17:25,173 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_triangular-2_bound2.i [2023-08-03 19:17:25,184 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5654c997e/a34bced6f9f54f7ca1e18197bc353d20/FLAG757c3ee3c [2023-08-03 19:17:25,196 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5654c997e/a34bced6f9f54f7ca1e18197bc353d20 [2023-08-03 19:17:25,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:17:25,199 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:17:25,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:17:25,201 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:17:25,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:17:25,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@401eb1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25, skipping insertion in model container [2023-08-03 19:17:25,205 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,249 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:17:25,559 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_triangular-2_bound2.i[31036,31049] [2023-08-03 19:17:25,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:17:25,571 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:17:25,600 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-03 19:17:25,601 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-03 19:17:25,620 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_triangular-2_bound2.i[31036,31049] [2023-08-03 19:17:25,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:17:25,649 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 19:17:25,650 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 19:17:25,656 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:17:25,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25 WrapperNode [2023-08-03 19:17:25,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:17:25,658 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:17:25,658 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:17:25,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:17:25,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,694 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,713 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2023-08-03 19:17:25,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:17:25,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:17:25,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:17:25,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:17:25,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,746 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,747 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,748 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,750 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:17:25,751 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:17:25,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:17:25,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:17:25,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (1/1) ... [2023-08-03 19:17:25,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:17:25,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:25,775 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 19:17:25,776 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 19:17:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:17:25,803 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:17:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:17:25,804 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:17:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:17:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 19:17:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:17:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:17:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:17:25,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:17:25,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 19:17:25,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:17:25,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:17:25,808 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 19:17:25,916 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:17:25,918 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:17:26,092 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:17:26,098 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:17:26,098 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 19:17:26,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:17:26 BoogieIcfgContainer [2023-08-03 19:17:26,100 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:17:26,102 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:17:26,102 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:17:26,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:17:26,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:17:25" (1/3) ... [2023-08-03 19:17:26,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d55ba47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:17:26, skipping insertion in model container [2023-08-03 19:17:26,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:17:25" (2/3) ... [2023-08-03 19:17:26,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d55ba47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:17:26, skipping insertion in model container [2023-08-03 19:17:26,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:17:26" (3/3) ... [2023-08-03 19:17:26,107 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_triangular-2_bound2.i [2023-08-03 19:17:26,115 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:17:26,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:17:26,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:17:26,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:17:26,178 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 19:17:26,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 80 transitions, 170 flow [2023-08-03 19:17:26,255 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-08-03 19:17:26,255 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:17:26,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 16/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2023-08-03 19:17:26,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 80 transitions, 170 flow [2023-08-03 19:17:26,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 80 transitions, 170 flow [2023-08-03 19:17:26,268 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:17:26,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 80 transitions, 170 flow [2023-08-03 19:17:26,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 80 transitions, 170 flow [2023-08-03 19:17:26,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 80 transitions, 170 flow [2023-08-03 19:17:26,326 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-08-03 19:17:26,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:17:26,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 16/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2023-08-03 19:17:26,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 1694 [2023-08-03 19:17:28,142 INFO L134 LiptonReduction]: Checked pairs total: 1481 [2023-08-03 19:17:28,142 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-03 19:17:28,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:17:28,159 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;@26f79009, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:17:28,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:17:28,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:17:28,162 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-03 19:17:28,162 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:17:28,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:28,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 19:17:28,163 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 19:17:28,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 9912496, now seen corresponding path program 1 times [2023-08-03 19:17:28,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:28,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985264364] [2023-08-03 19:17:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:28,409 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 19:17:28,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:28,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985264364] [2023-08-03 19:17:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985264364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:28,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:28,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:17:28,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277783341] [2023-08-03 19:17:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:28,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:28,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:17:28,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 150 [2023-08-03 19:17:28,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 19:17:28,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:28,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 150 [2023-08-03 19:17:28,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:28,545 INFO L124 PetriNetUnfolderBase]: 124/210 cut-off events. [2023-08-03 19:17:28,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:17:28,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 210 events. 124/210 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 414. Up to 199 conditions per place. [2023-08-03 19:17:28,549 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 18 selfloop transitions, 2 changer transitions 1/23 dead transitions. [2023-08-03 19:17:28,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 98 flow [2023-08-03 19:17:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-08-03 19:17:28,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2023-08-03 19:17:28,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-08-03 19:17:28,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-08-03 19:17:28,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:28,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-08-03 19:17:28,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 19:17:28,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states 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 19:17:28,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states 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 19:17:28,585 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 50 flow. Second operand 3 states and 227 transitions. [2023-08-03 19:17:28,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 98 flow [2023-08-03 19:17:28,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:17:28,590 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 54 flow [2023-08-03 19:17:28,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-03 19:17:28,595 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-03 19:17:28,595 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 54 flow [2023-08-03 19:17:28,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 19:17:28,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:28,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:17:28,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:17:28,596 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 19:17:28,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash 958838678, now seen corresponding path program 1 times [2023-08-03 19:17:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:28,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825870130] [2023-08-03 19:17:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:28,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:17:28,642 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:17:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:17:28,670 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:17:28,671 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:17:28,672 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 19:17:28,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 19:17:28,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:17:28,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:17:28,674 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 19:17:28,676 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:17:28,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:17:28,695 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 19:17:28,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 232 flow [2023-08-03 19:17:28,734 INFO L124 PetriNetUnfolderBase]: 37/358 cut-off events. [2023-08-03 19:17:28,734 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:17:28,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 358 events. 37/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1423 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 257. Up to 18 conditions per place. [2023-08-03 19:17:28,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 104 transitions, 232 flow [2023-08-03 19:17:28,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 104 transitions, 232 flow [2023-08-03 19:17:28,738 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:17:28,739 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 104 transitions, 232 flow [2023-08-03 19:17:28,739 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 104 transitions, 232 flow [2023-08-03 19:17:28,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 232 flow [2023-08-03 19:17:28,783 INFO L124 PetriNetUnfolderBase]: 37/358 cut-off events. [2023-08-03 19:17:28,783 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:17:28,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 358 events. 37/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1423 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 257. Up to 18 conditions per place. [2023-08-03 19:17:28,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 4444 [2023-08-03 19:17:30,571 INFO L134 LiptonReduction]: Checked pairs total: 4064 [2023-08-03 19:17:30,571 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-03 19:17:30,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:17:30,574 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;@26f79009, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:17:30,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:17:30,576 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:17:30,576 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-03 19:17:30,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:17:30,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:30,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 19:17:30,577 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 19:17:30,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash 16496236, now seen corresponding path program 1 times [2023-08-03 19:17:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:30,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3413770] [2023-08-03 19:17:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:30,614 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 19:17:30,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:30,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3413770] [2023-08-03 19:17:30,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3413770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:30,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:30,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:17:30,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493261217] [2023-08-03 19:17:30,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:30,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:30,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:17:30,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 190 [2023-08-03 19:17:30,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 19:17:30,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:30,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 190 [2023-08-03 19:17:30,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:30,957 INFO L124 PetriNetUnfolderBase]: 3088/4138 cut-off events. [2023-08-03 19:17:30,957 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-03 19:17:30,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8415 conditions, 4138 events. 3088/4138 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15433 event pairs, 1386 based on Foata normal form. 0/2737 useless extension candidates. Maximal degree in co-relation 2694. Up to 4045 conditions per place. [2023-08-03 19:17:30,977 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 27 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-08-03 19:17:30,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 152 flow [2023-08-03 19:17:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-03 19:17:30,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519298245614035 [2023-08-03 19:17:30,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-03 19:17:30,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-03 19:17:30,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:30,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-03 19:17:30,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 19:17:30,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 19:17:30,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 19:17:30,987 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 84 flow. Second operand 3 states and 296 transitions. [2023-08-03 19:17:30,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 152 flow [2023-08-03 19:17:30,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 148 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 19:17:30,991 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 88 flow [2023-08-03 19:17:30,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-03 19:17:30,992 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 19:17:30,992 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 88 flow [2023-08-03 19:17:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 19:17:30,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:30,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:30,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 19:17:30,993 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 19:17:30,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash -305782320, now seen corresponding path program 1 times [2023-08-03 19:17:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:30,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092521689] [2023-08-03 19:17:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:30,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:31,082 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 19:17:31,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:31,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092521689] [2023-08-03 19:17:31,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092521689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:31,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304826135] [2023-08-03 19:17:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:31,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:31,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:31,097 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 19:17:31,122 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 19:17:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:31,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:17:31,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:31,194 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 19:17:31,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:31,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304826135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:31,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:31,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 19:17:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436939422] [2023-08-03 19:17:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:31,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:17:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:17:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:31,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 190 [2023-08-03 19:17:31,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 19:17:31,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:31,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 190 [2023-08-03 19:17:31,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:31,436 INFO L124 PetriNetUnfolderBase]: 2521/3394 cut-off events. [2023-08-03 19:17:31,436 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-03 19:17:31,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6915 conditions, 3394 events. 2521/3394 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12202 event pairs, 1120 based on Foata normal form. 0/2362 useless extension candidates. Maximal degree in co-relation 6879. Up to 3127 conditions per place. [2023-08-03 19:17:31,456 INFO L140 encePairwiseOnDemand]: 187/190 looper letters, 34 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-03 19:17:31,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 182 flow [2023-08-03 19:17:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:17:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:17:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-03 19:17:31,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-08-03 19:17:31,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-03 19:17:31,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-03 19:17:31,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:31,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-03 19:17:31,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 19:17:31,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 19:17:31,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 19:17:31,461 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 88 flow. Second operand 3 states and 300 transitions. [2023-08-03 19:17:31,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 182 flow [2023-08-03 19:17:31,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:31,463 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 98 flow [2023-08-03 19:17:31,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-03 19:17:31,464 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-03 19:17:31,464 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 98 flow [2023-08-03 19:17:31,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 19:17:31,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:31,464 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:17:31,473 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 19:17:31,670 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 19:17:31,671 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:31,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash 874904513, now seen corresponding path program 1 times [2023-08-03 19:17:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403227091] [2023-08-03 19:17:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:31,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:31,726 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 19:17:31,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403227091] [2023-08-03 19:17:31,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403227091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292366517] [2023-08-03 19:17:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:31,728 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 19:17:31,750 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 19:17:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:31,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:17:31,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:31,864 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 19:17:31,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:31,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292366517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:31,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:31,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:17:31,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262323637] [2023-08-03 19:17:31,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:31,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:31,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:31,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:31,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:17:31,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 190 [2023-08-03 19:17:31,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 19:17:31,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:31,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 190 [2023-08-03 19:17:31,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:32,171 INFO L124 PetriNetUnfolderBase]: 2503/3364 cut-off events. [2023-08-03 19:17:32,171 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-08-03 19:17:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7189 conditions, 3364 events. 2503/3364 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12136 event pairs, 744 based on Foata normal form. 9/2491 useless extension candidates. Maximal degree in co-relation 2266. Up to 3237 conditions per place. [2023-08-03 19:17:32,190 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 33 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-03 19:17:32,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 195 flow [2023-08-03 19:17:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:17:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:17:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2023-08-03 19:17:32,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968421052631579 [2023-08-03 19:17:32,193 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2023-08-03 19:17:32,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2023-08-03 19:17:32,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:32,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2023-08-03 19:17:32,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 19:17:32,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 19:17:32,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 19:17:32,197 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 98 flow. Second operand 5 states and 472 transitions. [2023-08-03 19:17:32,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 195 flow [2023-08-03 19:17:32,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 19:17:32,201 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 114 flow [2023-08-03 19:17:32,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-03 19:17:32,203 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-03 19:17:32,203 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 114 flow [2023-08-03 19:17:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 19:17:32,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:32,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:32,215 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 19:17:32,410 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 19:17:32,410 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 19:17:32,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1886690364, now seen corresponding path program 1 times [2023-08-03 19:17:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:32,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151063059] [2023-08-03 19:17:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:32,460 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 19:17:32,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151063059] [2023-08-03 19:17:32,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151063059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557941738] [2023-08-03 19:17:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:32,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:32,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:32,463 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 19:17:32,466 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 19:17:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:32,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:17:32,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:32,541 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 19:17:32,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:17:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557941738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:32,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:32,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 19:17:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048627130] [2023-08-03 19:17:32,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:32,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:32,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:32,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 190 [2023-08-03 19:17:32,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 19:17:32,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:32,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 190 [2023-08-03 19:17:32,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:32,802 INFO L124 PetriNetUnfolderBase]: 2026/2680 cut-off events. [2023-08-03 19:17:32,802 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-08-03 19:17:32,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 2680 events. 2026/2680 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8942 event pairs, 558 based on Foata normal form. 3/1971 useless extension candidates. Maximal degree in co-relation 2266. Up to 2575 conditions per place. [2023-08-03 19:17:32,820 INFO L140 encePairwiseOnDemand]: 187/190 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-03 19:17:32,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 198 flow [2023-08-03 19:17:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:17:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:17:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 384 transitions. [2023-08-03 19:17:32,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2023-08-03 19:17:32,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 384 transitions. [2023-08-03 19:17:32,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 384 transitions. [2023-08-03 19:17:32,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:32,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 384 transitions. [2023-08-03 19:17:32,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:17:32,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 19:17:32,825 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 19:17:32,826 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 114 flow. Second operand 4 states and 384 transitions. [2023-08-03 19:17:32,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 198 flow [2023-08-03 19:17:32,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 193 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 19:17:32,828 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 105 flow [2023-08-03 19:17:32,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2023-08-03 19:17:32,830 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-08-03 19:17:32,830 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 105 flow [2023-08-03 19:17:32,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 19:17:32,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:32,832 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:32,839 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 19:17:33,036 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 19:17:33,037 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 19:17:33,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1950376889, now seen corresponding path program 1 times [2023-08-03 19:17:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325799928] [2023-08-03 19:17:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:33,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:17:33,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:33,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325799928] [2023-08-03 19:17:33,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325799928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092805981] [2023-08-03 19:17:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:33,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:33,081 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 19:17:33,084 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 19:17:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:33,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:17:33,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:17:33,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:17:33,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092805981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:33,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:33,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:17:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59626937] [2023-08-03 19:17:33,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:33,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:33,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:33,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 190 [2023-08-03 19:17:33,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 19:17:33,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:33,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 190 [2023-08-03 19:17:33,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:33,410 INFO L124 PetriNetUnfolderBase]: 1864/2464 cut-off events. [2023-08-03 19:17:33,410 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-03 19:17:33,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5266 conditions, 2464 events. 1864/2464 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7995 event pairs, 400 based on Foata normal form. 27/1833 useless extension candidates. Maximal degree in co-relation 2077. Up to 1282 conditions per place. [2023-08-03 19:17:33,425 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-03 19:17:33,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 249 flow [2023-08-03 19:17:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:17:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:17:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 397 transitions. [2023-08-03 19:17:33,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223684210526316 [2023-08-03 19:17:33,430 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 397 transitions. [2023-08-03 19:17:33,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 397 transitions. [2023-08-03 19:17:33,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:33,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 397 transitions. [2023-08-03 19:17:33,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states 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 19:17:33,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 19:17:33,433 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 19:17:33,433 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 105 flow. Second operand 4 states and 397 transitions. [2023-08-03 19:17:33,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 249 flow [2023-08-03 19:17:33,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 243 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:17:33,436 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 119 flow [2023-08-03 19:17:33,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2023-08-03 19:17:33,437 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-08-03 19:17:33,438 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 119 flow [2023-08-03 19:17:33,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 19:17:33,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:33,439 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:33,447 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 19:17:33,645 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 19:17:33,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:33,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:33,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1188226024, now seen corresponding path program 1 times [2023-08-03 19:17:33,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:33,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599211715] [2023-08-03 19:17:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:33,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:33,760 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 19:17:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:33,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599211715] [2023-08-03 19:17:33,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599211715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:33,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063766868] [2023-08-03 19:17:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:33,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:33,774 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 19:17:33,781 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 19:17:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:33,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:17:33,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:33,863 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 19:17:33,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063766868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 19:17:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119363582] [2023-08-03 19:17:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:17:33,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 190 [2023-08-03 19:17:33,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 19:17:33,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:33,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 190 [2023-08-03 19:17:33,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:34,061 INFO L124 PetriNetUnfolderBase]: 1540/2032 cut-off events. [2023-08-03 19:17:34,062 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-08-03 19:17:34,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 2032 events. 1540/2032 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6145 event pairs, 22 based on Foata normal form. 81/1563 useless extension candidates. Maximal degree in co-relation 1840. Up to 1215 conditions per place. [2023-08-03 19:17:34,071 INFO L140 encePairwiseOnDemand]: 187/190 looper letters, 51 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-03 19:17:34,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 275 flow [2023-08-03 19:17:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:17:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:17:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 489 transitions. [2023-08-03 19:17:34,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147368421052632 [2023-08-03 19:17:34,074 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 489 transitions. [2023-08-03 19:17:34,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 489 transitions. [2023-08-03 19:17:34,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:34,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 489 transitions. [2023-08-03 19:17:34,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.8) internal successors, (489), 5 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 19:17:34,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 19:17:34,077 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 19:17:34,077 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 119 flow. Second operand 5 states and 489 transitions. [2023-08-03 19:17:34,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 275 flow [2023-08-03 19:17:34,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 268 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 19:17:34,079 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 108 flow [2023-08-03 19:17:34,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2023-08-03 19:17:34,080 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-08-03 19:17:34,080 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 108 flow [2023-08-03 19:17:34,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 19:17:34,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:34,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:34,088 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 19:17:34,285 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 19:17:34,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:34,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1188225596, now seen corresponding path program 1 times [2023-08-03 19:17:34,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:34,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490162021] [2023-08-03 19:17:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:17:34,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:34,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490162021] [2023-08-03 19:17:34,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490162021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:34,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:34,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:17:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658919322] [2023-08-03 19:17:34,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:34,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:17:34,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:17:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 19:17:34,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 190 [2023-08-03 19:17:34,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 19:17:34,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:34,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 190 [2023-08-03 19:17:34,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:34,677 INFO L124 PetriNetUnfolderBase]: 2458/3211 cut-off events. [2023-08-03 19:17:34,677 INFO L125 PetriNetUnfolderBase]: For 1747/1747 co-relation queries the response was YES. [2023-08-03 19:17:34,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7431 conditions, 3211 events. 2458/3211 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11140 event pairs, 640 based on Foata normal form. 81/2379 useless extension candidates. Maximal degree in co-relation 2920. Up to 1774 conditions per place. [2023-08-03 19:17:34,694 INFO L140 encePairwiseOnDemand]: 185/190 looper letters, 49 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-08-03 19:17:34,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 297 flow [2023-08-03 19:17:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:17:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:17:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 389 transitions. [2023-08-03 19:17:34,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5118421052631579 [2023-08-03 19:17:34,696 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 389 transitions. [2023-08-03 19:17:34,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 389 transitions. [2023-08-03 19:17:34,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:34,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 389 transitions. [2023-08-03 19:17:34,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 19:17:34,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 19:17:34,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 19:17:34,699 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 108 flow. Second operand 4 states and 389 transitions. [2023-08-03 19:17:34,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 297 flow [2023-08-03 19:17:34,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 289 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:17:34,701 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 144 flow [2023-08-03 19:17:34,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-08-03 19:17:34,702 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-03 19:17:34,702 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 144 flow [2023-08-03 19:17:34,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 19:17:34,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:34,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:34,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 19:17:34,703 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 19:17:34,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash -489153497, now seen corresponding path program 1 times [2023-08-03 19:17:34,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:34,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582788486] [2023-08-03 19:17:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:34,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:34,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:34,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582788486] [2023-08-03 19:17:34,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582788486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:34,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088012175] [2023-08-03 19:17:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:34,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:34,812 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 19:17:34,822 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 19:17:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:34,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 19:17:34,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:34,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:17:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088012175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:34,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:17:34,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-03 19:17:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874622287] [2023-08-03 19:17:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:34,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:17:34,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-03 19:17:34,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 19:17:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-03 19:17:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:35,425 INFO L124 PetriNetUnfolderBase]: 5048/6567 cut-off events. [2023-08-03 19:17:35,425 INFO L125 PetriNetUnfolderBase]: For 3918/3918 co-relation queries the response was YES. [2023-08-03 19:17:35,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 6567 events. 5048/6567 cut-off events. For 3918/3918 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26265 event pairs, 957 based on Foata normal form. 136/5655 useless extension candidates. Maximal degree in co-relation 11987. Up to 3332 conditions per place. [2023-08-03 19:17:35,467 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 84 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2023-08-03 19:17:35,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 100 transitions, 566 flow [2023-08-03 19:17:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:17:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:17:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 586 transitions. [2023-08-03 19:17:35,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140350877192983 [2023-08-03 19:17:35,470 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 586 transitions. [2023-08-03 19:17:35,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 586 transitions. [2023-08-03 19:17:35,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:35,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 586 transitions. [2023-08-03 19:17:35,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 19:17:35,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states 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 19:17:35,473 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states 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 19:17:35,473 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 144 flow. Second operand 6 states and 586 transitions. [2023-08-03 19:17:35,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 100 transitions, 566 flow [2023-08-03 19:17:35,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 566 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:17:35,479 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 271 flow [2023-08-03 19:17:35,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-03 19:17:35,481 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2023-08-03 19:17:35,481 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 271 flow [2023-08-03 19:17:35,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 19:17:35,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:35,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:35,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 19:17:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:35,687 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 19:17:35,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash -489179537, now seen corresponding path program 2 times [2023-08-03 19:17:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:35,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030993266] [2023-08-03 19:17:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:17:35,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:35,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030993266] [2023-08-03 19:17:35,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030993266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:17:35,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:17:35,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 19:17:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827006184] [2023-08-03 19:17:35,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:17:35,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:17:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:35,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:17:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:17:35,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-03 19:17:35,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 19:17:35,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:35,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-03 19:17:35,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:36,372 INFO L124 PetriNetUnfolderBase]: 5360/7025 cut-off events. [2023-08-03 19:17:36,372 INFO L125 PetriNetUnfolderBase]: For 7626/7626 co-relation queries the response was YES. [2023-08-03 19:17:36,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21029 conditions, 7025 events. 5360/7025 cut-off events. For 7626/7626 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28518 event pairs, 1219 based on Foata normal form. 136/7151 useless extension candidates. Maximal degree in co-relation 16564. Up to 3588 conditions per place. [2023-08-03 19:17:36,412 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 86 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2023-08-03 19:17:36,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 111 transitions, 731 flow [2023-08-03 19:17:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:17:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:17:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 581 transitions. [2023-08-03 19:17:36,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096491228070176 [2023-08-03 19:17:36,415 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 581 transitions. [2023-08-03 19:17:36,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 581 transitions. [2023-08-03 19:17:36,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:36,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 581 transitions. [2023-08-03 19:17:36,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.83333333333333) internal successors, (581), 6 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 19:17:36,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states 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 19:17:36,419 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states 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 19:17:36,419 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 271 flow. Second operand 6 states and 581 transitions. [2023-08-03 19:17:36,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 111 transitions, 731 flow [2023-08-03 19:17:36,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 111 transitions, 721 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-03 19:17:36,442 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 438 flow [2023-08-03 19:17:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-03 19:17:36,443 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2023-08-03 19:17:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 438 flow [2023-08-03 19:17:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 19:17:36,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:36,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:36,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 19:17:36,444 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 19:17:36,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash -79811097, now seen corresponding path program 1 times [2023-08-03 19:17:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:36,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710029484] [2023-08-03 19:17:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:36,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:36,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:36,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710029484] [2023-08-03 19:17:36,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710029484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:36,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018149905] [2023-08-03 19:17:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:36,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:36,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:36,572 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 19:17:36,596 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 19:17:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:36,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:17:36,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:36,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:36,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018149905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:36,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:36,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-03 19:17:36,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070904293] [2023-08-03 19:17:36,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:36,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-03 19:17:36,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-03 19:17:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-03 19:17:36,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-03 19:17:36,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 438 flow. Second operand has 11 states, 11 states have (on average 86.0909090909091) internal successors, (947), 11 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 19:17:36,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:36,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-03 19:17:36,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:37,827 INFO L124 PetriNetUnfolderBase]: 8096/10527 cut-off events. [2023-08-03 19:17:37,827 INFO L125 PetriNetUnfolderBase]: For 21192/21192 co-relation queries the response was YES. [2023-08-03 19:17:37,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35043 conditions, 10527 events. 8096/10527 cut-off events. For 21192/21192 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 45325 event pairs, 616 based on Foata normal form. 256/10773 useless extension candidates. Maximal degree in co-relation 29821. Up to 1627 conditions per place. [2023-08-03 19:17:37,911 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 161 selfloop transitions, 47 changer transitions 0/210 dead transitions. [2023-08-03 19:17:37,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 210 transitions, 1418 flow [2023-08-03 19:17:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-03 19:17:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-03 19:17:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1264 transitions. [2023-08-03 19:17:37,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117408906882591 [2023-08-03 19:17:37,915 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1264 transitions. [2023-08-03 19:17:37,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1264 transitions. [2023-08-03 19:17:37,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:37,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1264 transitions. [2023-08-03 19:17:37,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 97.23076923076923) internal successors, (1264), 13 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 19:17:37,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 190.0) internal successors, (2660), 14 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states 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 19:17:37,922 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 190.0) internal successors, (2660), 14 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states 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 19:17:37,922 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 438 flow. Second operand 13 states and 1264 transitions. [2023-08-03 19:17:37,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 210 transitions, 1418 flow [2023-08-03 19:17:37,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 210 transitions, 1397 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-03 19:17:37,989 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 739 flow [2023-08-03 19:17:37,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=739, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-03 19:17:37,990 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 48 predicate places. [2023-08-03 19:17:37,990 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 739 flow [2023-08-03 19:17:37,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.0909090909091) internal successors, (947), 11 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 19:17:37,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:37,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:37,998 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 19:17:38,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:38,196 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 19:17:38,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash 556400461, now seen corresponding path program 2 times [2023-08-03 19:17:38,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:38,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794318070] [2023-08-03 19:17:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:38,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:38,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:38,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794318070] [2023-08-03 19:17:38,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794318070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:38,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821756870] [2023-08-03 19:17:38,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:17:38,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:38,321 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 19:17:38,343 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 19:17:38,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:17:38,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:17:38,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 19:17:38,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:38,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:38,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821756870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:38,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:38,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-03 19:17:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516173694] [2023-08-03 19:17:38,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 19:17:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 19:17:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-03 19:17:38,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-03 19:17:38,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 739 flow. Second operand has 15 states, 15 states have (on average 85.53333333333333) internal successors, (1283), 15 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states 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 19:17:38,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:38,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-03 19:17:38,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:40,527 INFO L124 PetriNetUnfolderBase]: 14224/18399 cut-off events. [2023-08-03 19:17:40,528 INFO L125 PetriNetUnfolderBase]: For 94681/94681 co-relation queries the response was YES. [2023-08-03 19:17:40,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77608 conditions, 18399 events. 14224/18399 cut-off events. For 94681/94681 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 84722 event pairs, 643 based on Foata normal form. 320/18709 useless extension candidates. Maximal degree in co-relation 71247. Up to 2935 conditions per place. [2023-08-03 19:17:40,650 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 247 selfloop transitions, 84 changer transitions 0/333 dead transitions. [2023-08-03 19:17:40,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 333 transitions, 2859 flow [2023-08-03 19:17:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-03 19:17:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-03 19:17:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1946 transitions. [2023-08-03 19:17:40,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121052631578947 [2023-08-03 19:17:40,655 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1946 transitions. [2023-08-03 19:17:40,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1946 transitions. [2023-08-03 19:17:40,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:40,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1946 transitions. [2023-08-03 19:17:40,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 97.3) internal successors, (1946), 20 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states 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 19:17:40,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 19:17:40,666 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 19:17:40,666 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 739 flow. Second operand 20 states and 1946 transitions. [2023-08-03 19:17:40,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 333 transitions, 2859 flow [2023-08-03 19:17:41,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 333 transitions, 2649 flow, removed 76 selfloop flow, removed 8 redundant places. [2023-08-03 19:17:41,290 INFO L231 Difference]: Finished difference. Result has 103 places, 115 transitions, 1337 flow [2023-08-03 19:17:41,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1337, PETRI_PLACES=103, PETRI_TRANSITIONS=115} [2023-08-03 19:17:41,291 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 69 predicate places. [2023-08-03 19:17:41,291 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 115 transitions, 1337 flow [2023-08-03 19:17:41,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.53333333333333) internal successors, (1283), 15 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states 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 19:17:41,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:41,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:41,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:41,497 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,SelfDestructingSolverStorable12 [2023-08-03 19:17:41,497 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 19:17:41,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash -403122141, now seen corresponding path program 3 times [2023-08-03 19:17:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764964795] [2023-08-03 19:17:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:41,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764964795] [2023-08-03 19:17:41,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764964795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:41,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939390674] [2023-08-03 19:17:41,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 19:17:41,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:41,690 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 19:17:41,693 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 19:17:41,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-03 19:17:41,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:17:41,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-03 19:17:41,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:41,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:41,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939390674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:41,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:41,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-03 19:17:41,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445605795] [2023-08-03 19:17:41,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:41,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-03 19:17:41,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-03 19:17:41,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-03 19:17:42,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-03 19:17:42,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 115 transitions, 1337 flow. Second operand has 19 states, 19 states have (on average 85.21052631578948) internal successors, (1619), 19 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states 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 19:17:42,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:42,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-03 19:17:42,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:44,768 INFO L124 PetriNetUnfolderBase]: 18000/23263 cut-off events. [2023-08-03 19:17:44,768 INFO L125 PetriNetUnfolderBase]: For 252936/252936 co-relation queries the response was YES. [2023-08-03 19:17:44,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120721 conditions, 23263 events. 18000/23263 cut-off events. For 252936/252936 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 108565 event pairs, 640 based on Foata normal form. 256/23509 useless extension candidates. Maximal degree in co-relation 111857. Up to 3391 conditions per place. [2023-08-03 19:17:45,056 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 262 selfloop transitions, 103 changer transitions 0/367 dead transitions. [2023-08-03 19:17:45,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 367 transitions, 3897 flow [2023-08-03 19:17:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-03 19:17:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-03 19:17:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2040 transitions. [2023-08-03 19:17:45,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112781954887218 [2023-08-03 19:17:45,066 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2040 transitions. [2023-08-03 19:17:45,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2040 transitions. [2023-08-03 19:17:45,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:45,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2040 transitions. [2023-08-03 19:17:45,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 97.14285714285714) internal successors, (2040), 21 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states 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 19:17:45,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 190.0) internal successors, (4180), 22 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states 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 19:17:45,084 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 190.0) internal successors, (4180), 22 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states 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 19:17:45,084 INFO L175 Difference]: Start difference. First operand has 103 places, 115 transitions, 1337 flow. Second operand 21 states and 2040 transitions. [2023-08-03 19:17:45,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 367 transitions, 3897 flow [2023-08-03 19:17:47,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 367 transitions, 3447 flow, removed 207 selfloop flow, removed 5 redundant places. [2023-08-03 19:17:47,108 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 1771 flow [2023-08-03 19:17:47,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1771, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2023-08-03 19:17:47,108 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2023-08-03 19:17:47,109 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 1771 flow [2023-08-03 19:17:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.21052631578948) internal successors, (1619), 19 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states 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 19:17:47,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:47,109 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:47,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 19:17:47,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 19:17:47,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:47,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash -654523664, now seen corresponding path program 4 times [2023-08-03 19:17:47,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683758044] [2023-08-03 19:17:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:47,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683758044] [2023-08-03 19:17:47,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683758044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53372720] [2023-08-03 19:17:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 19:17:47,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:47,573 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 19:17:47,600 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 19:17:47,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 19:17:47,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:17:47,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 19:17:47,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:47,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53372720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:47,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:47,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-08-03 19:17:47,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854153065] [2023-08-03 19:17:47,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:47,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 19:17:47,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:47,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 19:17:47,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-08-03 19:17:47,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-03 19:17:47,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 1771 flow. Second operand has 15 states, 15 states have (on average 84.73333333333333) internal successors, (1271), 15 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states 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 19:17:47,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:47,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-03 19:17:47,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:50,666 INFO L124 PetriNetUnfolderBase]: 18848/24385 cut-off events. [2023-08-03 19:17:50,667 INFO L125 PetriNetUnfolderBase]: For 359912/359912 co-relation queries the response was YES. [2023-08-03 19:17:50,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136927 conditions, 24385 events. 18848/24385 cut-off events. For 359912/359912 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 113952 event pairs, 1162 based on Foata normal form. 64/24431 useless extension candidates. Maximal degree in co-relation 133556. Up to 3445 conditions per place. [2023-08-03 19:17:50,848 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 249 selfloop transitions, 109 changer transitions 0/360 dead transitions. [2023-08-03 19:17:50,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 360 transitions, 4143 flow [2023-08-03 19:17:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-03 19:17:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-03 19:17:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1937 transitions. [2023-08-03 19:17:50,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097368421052632 [2023-08-03 19:17:50,853 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1937 transitions. [2023-08-03 19:17:50,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1937 transitions. [2023-08-03 19:17:50,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:50,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1937 transitions. [2023-08-03 19:17:50,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.85) internal successors, (1937), 20 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states 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 19:17:50,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 19:17:50,865 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 190.0) internal successors, (3990), 21 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 19:17:50,865 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 1771 flow. Second operand 20 states and 1937 transitions. [2023-08-03 19:17:50,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 360 transitions, 4143 flow [2023-08-03 19:17:54,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 360 transitions, 3741 flow, removed 146 selfloop flow, removed 11 redundant places. [2023-08-03 19:17:54,930 INFO L231 Difference]: Finished difference. Result has 136 places, 144 transitions, 1753 flow [2023-08-03 19:17:54,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1753, PETRI_PLACES=136, PETRI_TRANSITIONS=144} [2023-08-03 19:17:54,931 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 102 predicate places. [2023-08-03 19:17:54,931 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 144 transitions, 1753 flow [2023-08-03 19:17:54,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.73333333333333) internal successors, (1271), 15 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states 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 19:17:54,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:17:54,932 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:17:54,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 19:17:55,133 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,SelfDestructingSolverStorable14 [2023-08-03 19:17:55,133 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:17:55,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:17:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash -662591394, now seen corresponding path program 5 times [2023-08-03 19:17:55,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:17:55,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584467020] [2023-08-03 19:17:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:17:55,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:17:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:17:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:55,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:17:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584467020] [2023-08-03 19:17:55,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584467020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:17:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41441723] [2023-08-03 19:17:55,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-03 19:17:55,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:17:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:17:55,335 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 19:17:55,338 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 19:17:55,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-03 19:17:55,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:17:55,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 19:17:55,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:17:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:55,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:17:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:17:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41441723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:17:55,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:17:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-03 19:17:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27170538] [2023-08-03 19:17:55,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:17:55,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-03 19:17:55,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:17:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-03 19:17:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-08-03 19:17:55,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 190 [2023-08-03 19:17:55,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 144 transitions, 1753 flow. Second operand has 24 states, 24 states have (on average 84.95833333333333) internal successors, (2039), 24 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states 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 19:17:55,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:17:55,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 190 [2023-08-03 19:17:55,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:17:59,161 INFO L124 PetriNetUnfolderBase]: 21968/28383 cut-off events. [2023-08-03 19:17:59,161 INFO L125 PetriNetUnfolderBase]: For 514397/514397 co-relation queries the response was YES. [2023-08-03 19:17:59,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165510 conditions, 28383 events. 21968/28383 cut-off events. For 514397/514397 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 134107 event pairs, 781 based on Foata normal form. 320/28693 useless extension candidates. Maximal degree in co-relation 162137. Up to 4015 conditions per place. [2023-08-03 19:17:59,565 INFO L140 encePairwiseOnDemand]: 183/190 looper letters, 344 selfloop transitions, 129 changer transitions 0/475 dead transitions. [2023-08-03 19:17:59,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 475 transitions, 5455 flow [2023-08-03 19:17:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-03 19:17:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-03 19:17:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2718 transitions. [2023-08-03 19:17:59,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109022556390977 [2023-08-03 19:17:59,570 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2718 transitions. [2023-08-03 19:17:59,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2718 transitions. [2023-08-03 19:17:59,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:17:59,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2718 transitions. [2023-08-03 19:17:59,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.07142857142857) internal successors, (2718), 28 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states 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 19:17:59,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 190.0) internal successors, (5510), 29 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states 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 19:17:59,600 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 190.0) internal successors, (5510), 29 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states 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 19:17:59,600 INFO L175 Difference]: Start difference. First operand has 136 places, 144 transitions, 1753 flow. Second operand 28 states and 2718 transitions. [2023-08-03 19:17:59,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 475 transitions, 5455 flow [2023-08-03 19:18:03,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 475 transitions, 5135 flow, removed 56 selfloop flow, removed 18 redundant places. [2023-08-03 19:18:03,392 INFO L231 Difference]: Finished difference. Result has 153 places, 165 transitions, 2367 flow [2023-08-03 19:18:03,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2367, PETRI_PLACES=153, PETRI_TRANSITIONS=165} [2023-08-03 19:18:03,393 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 119 predicate places. [2023-08-03 19:18:03,393 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 165 transitions, 2367 flow [2023-08-03 19:18:03,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.95833333333333) internal successors, (2039), 24 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states 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 19:18:03,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:18:03,394 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:18:03,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 19:18:03,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 19:18:03,596 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:18:03,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:18:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1184629855, now seen corresponding path program 6 times [2023-08-03 19:18:03,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:18:03,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550955285] [2023-08-03 19:18:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:18:03,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:18:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:18:03,616 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:18:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:18:03,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:18:03,671 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:18:03,671 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 19:18:03,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 19:18:03,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:18:03,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 19:18:03,672 INFO L445 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:18:03,675 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 19:18:03,675 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 19:18:03,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 07:18:03 BasicIcfg [2023-08-03 19:18:03,758 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 19:18:03,758 INFO L158 Benchmark]: Toolchain (without parser) took 38558.92ms. Allocated memory was 352.3MB in the beginning and 8.8GB in the end (delta: 8.5GB). Free memory was 296.1MB in the beginning and 7.9GB in the end (delta: -7.6GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-03 19:18:03,758 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 302.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 19:18:03,758 INFO L158 Benchmark]: CACSL2BoogieTranslator took 456.76ms. Allocated memory is still 352.3MB. Free memory was 295.8MB in the beginning and 276.5MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 19:18:03,759 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.71ms. Allocated memory is still 352.3MB. Free memory was 276.2MB in the beginning and 274.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 19:18:03,759 INFO L158 Benchmark]: Boogie Preprocessor took 36.00ms. Allocated memory is still 352.3MB. Free memory was 274.4MB in the beginning and 272.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 19:18:03,759 INFO L158 Benchmark]: RCFGBuilder took 349.52ms. Allocated memory was 352.3MB in the beginning and 528.5MB in the end (delta: 176.2MB). Free memory was 272.8MB in the beginning and 490.7MB in the end (delta: -217.9MB). Peak memory consumption was 17.8MB. Max. memory is 16.0GB. [2023-08-03 19:18:03,759 INFO L158 Benchmark]: TraceAbstraction took 37655.51ms. Allocated memory was 528.5MB in the beginning and 8.8GB in the end (delta: 8.3GB). Free memory was 489.9MB in the beginning and 7.9GB in the end (delta: -7.4GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-03 19:18:03,764 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 302.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 456.76ms. Allocated memory is still 352.3MB. Free memory was 295.8MB in the beginning and 276.5MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.71ms. Allocated memory is still 352.3MB. Free memory was 276.2MB in the beginning and 274.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 36.00ms. Allocated memory is still 352.3MB. Free memory was 274.4MB in the beginning and 272.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 349.52ms. Allocated memory was 352.3MB in the beginning and 528.5MB in the end (delta: 176.2MB). Free memory was 272.8MB in the beginning and 490.7MB in the end (delta: -217.9MB). Peak memory consumption was 17.8MB. Max. memory is 16.0GB. * TraceAbstraction took 37655.51ms. Allocated memory was 528.5MB in the beginning and 8.8GB in the end (delta: 8.3GB). Free memory was 489.9MB in the beginning and 7.9GB in the end (delta: -7.4GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 78 PlacesBefore, 22 PlacesAfterwards, 80 TransitionsBefore, 20 TransitionsAfterwards, 1694 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 4 ChoiceCompositions, 70 TotalNumberOfCompositions, 1481 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1302, independent: 1275, independent conditional: 0, independent unconditional: 1275, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 895, independent: 881, independent conditional: 0, independent unconditional: 881, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1302, independent: 394, independent conditional: 0, independent unconditional: 394, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 895, unknown conditional: 0, unknown unconditional: 895] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 102 PlacesBefore, 34 PlacesAfterwards, 104 TransitionsBefore, 30 TransitionsAfterwards, 4444 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 6 ChoiceCompositions, 86 TotalNumberOfCompositions, 4064 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3532, independent: 3496, independent conditional: 0, independent unconditional: 3496, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2267, independent: 2249, independent conditional: 0, independent unconditional: 2249, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3532, independent: 1247, independent conditional: 0, independent unconditional: 1247, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 2267, unknown conditional: 0, unknown unconditional: 2267] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1[2], id2[2]; [L713] 0 int asdf=0; VAL [\old(argc)=51, argc=51, argv={50:49}, argv={50:49}, asdf=0, i=3, id1={5:0}, id2={3:0}, j=6] [L713] COND TRUE 0 asdf<2 [L713] FCALL, FORK 0 pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=0, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0))=9] [L713] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, i=3, id1={5:0}, id2={3:0}, j=6] [L713] COND TRUE 0 asdf<2 [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L713] FCALL, FORK 0 pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id1[asdf], ((void *)0), t1, ((void *)0))=10] [L713] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, i=3, id1={5:0}, id2={3:0}, j=6, k=0] [L713] COND FALSE 0 !(asdf<2) [L714] 0 int asdf=0; VAL [\old(argc)=51, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=0, asdf=2, i=3, id1={5:0}, id2={3:0}, j=6, k=0] [L714] COND TRUE 0 asdf<2 [L714] FCALL, FORK 0 pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=0, asdf=2, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0))=11] [L714] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, asdf=2, i=3, id1={5:0}, id2={3:0}, j=6, k=0] [L714] COND TRUE 0 asdf<2 [L704] 3 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L714] FCALL, FORK 0 pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=1, asdf=2, i=3, id1={5:0}, id2={3:0}, j=6, k=0, k=0, pthread_create(&id2[asdf], ((void *)0), t2, ((void *)0))=12] [L714] 0 asdf++ VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, asdf=2, i=3, id1={5:0}, id2={3:0}, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 3 k < 5 [L706] 3 j = i + 1 [L704] 3 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L714] COND FALSE 0 !(asdf<2) [L716] 0 int condI = i >= (2*5 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, asdf=2, condI=0, i=15, id1={5:0}, id2={3:0}, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={50:49}, argv={50:49}, asdf=2, asdf=2, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=5, k=5] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.5s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40 IncrementalHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 40 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 114 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 35.0s, OverallIterations: 15, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 27.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3590 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3494 mSDsluCounter, 303 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 292 mSDsCounter, 452 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3761 IncrementalHoareTripleChecker+Invalid, 4213 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 452 mSolverCounterUnsat, 11 mSDtfsCounter, 3761 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 535 GetRequests, 334 SyntacticMatches, 13 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2367occurred in iteration=14, InterpolantAutomatonStates: 142, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 536 NumberOfCodeBlocks, 536 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 640 ConstructedInterpolants, 0 QuantifiedInterpolants, 1992 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1644 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 32 InterpolantComputations, 7 PerfectInterpolantSequences, 252/421 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 19:18:03,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...