/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/weaver_popl20-nonblocking-cntr.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:48:13,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:48:13,634 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:48:13,638 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:48:13,639 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:48:13,639 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:48:13,639 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:48:13,658 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:48:13,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:48:13,659 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:48:13,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:48:13,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:48:13,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:48:13,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:48:13,661 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:48:13,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:48:13,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:48:13,662 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:48:13,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:48:13,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:48:13,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:48:13,663 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:48:13,664 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:48:13,664 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:48:13,664 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:48:13,665 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:48:13,665 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:48:13,665 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:48:13,666 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:48:13,666 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:48:13,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:48:13,667 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:48:13,667 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:48:13,667 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:48:13,668 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:48:13,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:48:13,668 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:48:13,668 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:48:13,669 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:48:13,669 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:48:13,669 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:48:13,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:48:13,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:48:13,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:48:13,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:48:13,870 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:48:13,871 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:48:13,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c [2023-08-03 20:48:15,041 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:48:15,233 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:48:15,233 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c [2023-08-03 20:48:15,240 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2038e1c69/a313cc223e004bd2a23c8ffb896c0381/FLAG7817aa069 [2023-08-03 20:48:15,252 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2038e1c69/a313cc223e004bd2a23c8ffb896c0381 [2023-08-03 20:48:15,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:48:15,256 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:48:15,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:48:15,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:48:15,262 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:48:15,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1ca679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15, skipping insertion in model container [2023-08-03 20:48:15,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,288 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:48:15,432 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c[2199,2212] [2023-08-03 20:48:15,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:48:15,441 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:48:15,460 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c[2199,2212] [2023-08-03 20:48:15,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:48:15,467 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:48:15,467 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:48:15,472 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:48:15,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15 WrapperNode [2023-08-03 20:48:15,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:48:15,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:48:15,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:48:15,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:48:15,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,485 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,501 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2023-08-03 20:48:15,502 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:48:15,502 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:48:15,502 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:48:15,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:48:15,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,510 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,511 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,516 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,519 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,523 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:48:15,524 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:48:15,524 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:48:15,524 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:48:15,525 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (1/1) ... [2023-08-03 20:48:15,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:48:15,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:15,558 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 20:48:15,578 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 20:48:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:48:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:48:15,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:48:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:48:15,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:48:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:48:15,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:48:15,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:48:15,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:48:15,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:48:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:48:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:48:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:48:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:48:15,598 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 20:48:15,699 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:48:15,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:48:15,889 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:48:15,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:48:15,927 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 20:48:15,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:48:15 BoogieIcfgContainer [2023-08-03 20:48:15,929 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:48:15,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:48:15,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:48:15,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:48:15,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:48:15" (1/3) ... [2023-08-03 20:48:15,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b495e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:48:15, skipping insertion in model container [2023-08-03 20:48:15,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:15" (2/3) ... [2023-08-03 20:48:15,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b495e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:48:15, skipping insertion in model container [2023-08-03 20:48:15,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:48:15" (3/3) ... [2023-08-03 20:48:15,937 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-nonblocking-cntr.wvr_bound2.c [2023-08-03 20:48:15,944 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:48:15,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:48:15,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:48:15,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:48:16,017 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:48:16,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 234 flow [2023-08-03 20:48:16,146 INFO L124 PetriNetUnfolderBase]: 33/243 cut-off events. [2023-08-03 20:48:16,146 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:48:16,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 33/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-03 20:48:16,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 106 transitions, 234 flow [2023-08-03 20:48:16,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 106 transitions, 234 flow [2023-08-03 20:48:16,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:48:16,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 106 transitions, 234 flow [2023-08-03 20:48:16,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 106 transitions, 234 flow [2023-08-03 20:48:16,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 234 flow [2023-08-03 20:48:16,260 INFO L124 PetriNetUnfolderBase]: 33/243 cut-off events. [2023-08-03 20:48:16,261 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:48:16,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 33/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-03 20:48:16,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 2052 [2023-08-03 20:48:18,553 INFO L134 LiptonReduction]: Checked pairs total: 2590 [2023-08-03 20:48:18,553 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 20:48:18,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:48:18,569 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;@5f1d6ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:48:18,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:48:18,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:48:18,573 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 20:48:18,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:48:18,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:18,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:48:18,574 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 20:48:18,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash 411801921, now seen corresponding path program 1 times [2023-08-03 20:48:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416403186] [2023-08-03 20:48:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:18,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:18,727 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 20:48:18,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416403186] [2023-08-03 20:48:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416403186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:18,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:18,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:48:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40633042] [2023-08-03 20:48:18,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:18,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:18,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:18,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:48:18,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 195 [2023-08-03 20:48:18,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 20:48:18,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:18,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 195 [2023-08-03 20:48:18,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:18,855 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-03 20:48:18,856 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 20:48:18,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 420 events. 260/420 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1620 event pairs, 86 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 692. Up to 390 conditions per place. [2023-08-03 20:48:18,860 INFO L140 encePairwiseOnDemand]: 191/195 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 20:48:18,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-03 20:48:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-03 20:48:18,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48376068376068376 [2023-08-03 20:48:18,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-03 20:48:18,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-03 20:48:18,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:18,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-03 20:48:18,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 20:48:18,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 20:48:18,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 20:48:18,885 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 283 transitions. [2023-08-03 20:48:18,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-03 20:48:18,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:48:18,890 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 88 flow [2023-08-03 20:48:18,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-03 20:48:18,895 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 20:48:18,895 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 88 flow [2023-08-03 20:48:18,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 20:48:18,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:18,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 20:48:18,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:48:18,896 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 20:48:18,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash -105819538, now seen corresponding path program 1 times [2023-08-03 20:48:18,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:18,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856021595] [2023-08-03 20:48:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:18,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:48:18,919 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:48:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:48:18,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:48:18,950 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:48:18,951 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:48:18,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:48:18,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:48:18,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:48:18,954 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:48:18,956 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:48:18,956 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:48:18,987 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:48:18,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 129 transitions, 306 flow [2023-08-03 20:48:19,064 INFO L124 PetriNetUnfolderBase]: 134/806 cut-off events. [2023-08-03 20:48:19,064 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:48:19,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 806 events. 134/806 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4073 event pairs, 1 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 476. Up to 32 conditions per place. [2023-08-03 20:48:19,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 129 transitions, 306 flow [2023-08-03 20:48:19,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 129 transitions, 306 flow [2023-08-03 20:48:19,075 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:48:19,075 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 129 transitions, 306 flow [2023-08-03 20:48:19,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 129 transitions, 306 flow [2023-08-03 20:48:19,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 129 transitions, 306 flow [2023-08-03 20:48:19,155 INFO L124 PetriNetUnfolderBase]: 134/806 cut-off events. [2023-08-03 20:48:19,155 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:48:19,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 806 events. 134/806 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4073 event pairs, 1 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 476. Up to 32 conditions per place. [2023-08-03 20:48:19,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 5028 [2023-08-03 20:48:21,627 INFO L134 LiptonReduction]: Checked pairs total: 7587 [2023-08-03 20:48:21,628 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-03 20:48:21,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:48:21,630 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;@5f1d6ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:48:21,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:48:21,633 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:48:21,633 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 20:48:21,633 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:48:21,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:21,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:48:21,633 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 20:48:21,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash 654123068, now seen corresponding path program 1 times [2023-08-03 20:48:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:21,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941144127] [2023-08-03 20:48:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:21,696 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 20:48:21,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:21,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941144127] [2023-08-03 20:48:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941144127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:21,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:21,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:48:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066298638] [2023-08-03 20:48:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:48:21,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 233 [2023-08-03 20:48:21,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 20:48:21,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:21,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 233 [2023-08-03 20:48:21,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:22,501 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-03 20:48:22,501 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-08-03 20:48:22,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 47618 event pairs, 3472 based on Foata normal form. 0/6248 useless extension candidates. Maximal degree in co-relation 6836. Up to 10600 conditions per place. [2023-08-03 20:48:22,580 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-03 20:48:22,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-03 20:48:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-03 20:48:22,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47639484978540775 [2023-08-03 20:48:22,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-03 20:48:22,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-03 20:48:22,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:22,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-03 20:48:22,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 20:48:22,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:22,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:22,588 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 333 transitions. [2023-08-03 20:48:22,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-03 20:48:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:48:22,593 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 146 flow [2023-08-03 20:48:22,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-03 20:48:22,594 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-03 20:48:22,594 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 146 flow [2023-08-03 20:48:22,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 20:48:22,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:22,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:22,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:48:22,595 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 20:48:22,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:22,595 INFO L85 PathProgramCache]: Analyzing trace with hash 527050754, now seen corresponding path program 1 times [2023-08-03 20:48:22,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:22,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770321257] [2023-08-03 20:48:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:22,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:22,687 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 20:48:22,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:22,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770321257] [2023-08-03 20:48:22,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770321257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:22,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823867661] [2023-08-03 20:48:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:22,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:22,697 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 20:48:22,731 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 20:48:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:22,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:48:22,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:22,806 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 20:48:22,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:22,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823867661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:22,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:22,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:48:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29939819] [2023-08-03 20:48:22,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:22,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:22,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 233 [2023-08-03 20:48:22,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 20:48:22,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:22,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 233 [2023-08-03 20:48:22,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:23,538 INFO L124 PetriNetUnfolderBase]: 8488/11053 cut-off events. [2023-08-03 20:48:23,539 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-08-03 20:48:23,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22377 conditions, 11053 events. 8488/11053 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49999 event pairs, 3438 based on Foata normal form. 0/6301 useless extension candidates. Maximal degree in co-relation 22347. Up to 10389 conditions per place. [2023-08-03 20:48:23,627 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 40 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 20:48:23,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 246 flow [2023-08-03 20:48:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-03 20:48:23,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48068669527896996 [2023-08-03 20:48:23,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-03 20:48:23,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-03 20:48:23,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:23,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-03 20:48:23,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 20:48:23,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:23,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:23,634 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 146 flow. Second operand 3 states and 336 transitions. [2023-08-03 20:48:23,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 246 flow [2023-08-03 20:48:23,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:23,637 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2023-08-03 20:48:23,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-03 20:48:23,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-03 20:48:23,639 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2023-08-03 20:48:23,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 20:48:23,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:23,639 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 20:48:23,650 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 20:48:23,853 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 20:48:23,853 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 20:48:23,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:23,854 INFO L85 PathProgramCache]: Analyzing trace with hash 115010471, now seen corresponding path program 1 times [2023-08-03 20:48:23,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:23,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690956970] [2023-08-03 20:48:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:23,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:23,905 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 20:48:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690956970] [2023-08-03 20:48:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690956970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215433694] [2023-08-03 20:48:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:23,908 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 20:48:23,910 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 20:48:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:23,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:23,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:23,991 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 20:48:23,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215433694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:23,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:23,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 20:48:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895139183] [2023-08-03 20:48:23,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:23,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:48:24,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 233 [2023-08-03 20:48:24,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states 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 20:48:24,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:24,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 233 [2023-08-03 20:48:24,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:24,724 INFO L124 PetriNetUnfolderBase]: 8480/11030 cut-off events. [2023-08-03 20:48:24,725 INFO L125 PetriNetUnfolderBase]: For 1146/1146 co-relation queries the response was YES. [2023-08-03 20:48:24,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22615 conditions, 11030 events. 8480/11030 cut-off events. For 1146/1146 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 49356 event pairs, 2430 based on Foata normal form. 9/6435 useless extension candidates. Maximal degree in co-relation 6924. Up to 10511 conditions per place. [2023-08-03 20:48:24,808 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-03 20:48:24,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 257 flow [2023-08-03 20:48:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-08-03 20:48:24,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532188841201717 [2023-08-03 20:48:24,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-08-03 20:48:24,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-08-03 20:48:24,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:24,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-08-03 20:48:24,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 20:48:24,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:24,814 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:24,814 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 5 states and 528 transitions. [2023-08-03 20:48:24,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 257 flow [2023-08-03 20:48:24,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 248 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:24,821 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 165 flow [2023-08-03 20:48:24,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-03 20:48:24,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-03 20:48:24,823 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 165 flow [2023-08-03 20:48:24,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states 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 20:48:24,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:24,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:24,834 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 20:48:25,034 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 20:48:25,035 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 20:48:25,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:25,035 INFO L85 PathProgramCache]: Analyzing trace with hash 772462778, now seen corresponding path program 1 times [2023-08-03 20:48:25,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:25,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480135744] [2023-08-03 20:48:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:25,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:25,069 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 20:48:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480135744] [2023-08-03 20:48:25,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480135744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939175039] [2023-08-03 20:48:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:25,071 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 20:48:25,096 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 20:48:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:25,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:48:25,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:48:25,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:25,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939175039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:25,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:25,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:48:25,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767234190] [2023-08-03 20:48:25,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:25,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:25,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:25,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 233 [2023-08-03 20:48:25,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:48:25,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:25,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 233 [2023-08-03 20:48:25,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:25,721 INFO L124 PetriNetUnfolderBase]: 7233/9555 cut-off events. [2023-08-03 20:48:25,721 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2023-08-03 20:48:25,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19560 conditions, 9555 events. 7233/9555 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43667 event pairs, 2468 based on Foata normal form. 0/5681 useless extension candidates. Maximal degree in co-relation 6706. Up to 6763 conditions per place. [2023-08-03 20:48:25,799 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 48 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:48:25,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 303 flow [2023-08-03 20:48:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-03 20:48:25,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892703862660944 [2023-08-03 20:48:25,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-03 20:48:25,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-03 20:48:25,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:25,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-03 20:48:25,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 20:48:25,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:25,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:25,804 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 165 flow. Second operand 3 states and 342 transitions. [2023-08-03 20:48:25,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 303 flow [2023-08-03 20:48:25,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:25,806 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 170 flow [2023-08-03 20:48:25,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-03 20:48:25,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 20:48:25,807 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 170 flow [2023-08-03 20:48:25,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:48:25,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:25,808 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:25,819 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 20:48:26,019 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 20:48:26,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:26,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1061111994, now seen corresponding path program 1 times [2023-08-03 20:48:26,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:26,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634479514] [2023-08-03 20:48:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:26,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:48:26,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:26,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634479514] [2023-08-03 20:48:26,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634479514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:26,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819857656] [2023-08-03 20:48:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:26,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:26,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:26,101 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 20:48:26,104 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 20:48:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:26,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:26,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:48:26,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:48:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819857656] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:26,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:26,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 20:48:26,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915168958] [2023-08-03 20:48:26,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:26,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:48:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:48:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:48:26,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 233 [2023-08-03 20:48:26,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 170 flow. Second operand has 4 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 20:48:26,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:26,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 233 [2023-08-03 20:48:26,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:26,737 INFO L124 PetriNetUnfolderBase]: 6552/8619 cut-off events. [2023-08-03 20:48:26,737 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2023-08-03 20:48:26,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 8619 events. 6552/8619 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38358 event pairs, 1930 based on Foata normal form. 3/5259 useless extension candidates. Maximal degree in co-relation 5227. Up to 8209 conditions per place. [2023-08-03 20:48:26,802 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-03 20:48:26,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 264 flow [2023-08-03 20:48:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 430 transitions. [2023-08-03 20:48:26,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613733905579399 [2023-08-03 20:48:26,804 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 430 transitions. [2023-08-03 20:48:26,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 430 transitions. [2023-08-03 20:48:26,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:26,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 430 transitions. [2023-08-03 20:48:26,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 20:48:26,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:26,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:26,808 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 170 flow. Second operand 4 states and 430 transitions. [2023-08-03 20:48:26,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 264 flow [2023-08-03 20:48:26,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:26,815 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 166 flow [2023-08-03 20:48:26,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 20:48:26,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:48:26,817 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 166 flow [2023-08-03 20:48:26,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 20:48:26,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:26,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:26,825 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 20:48:27,022 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 20:48:27,023 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 20:48:27,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1635488467, now seen corresponding path program 1 times [2023-08-03 20:48:27,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:27,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837617286] [2023-08-03 20:48:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:27,121 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 20:48:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837617286] [2023-08-03 20:48:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837617286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646661578] [2023-08-03 20:48:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:27,123 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 20:48:27,127 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 20:48:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:27,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:27,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:27,204 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 20:48:27,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646661578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:27,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:27,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:48:27,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864022235] [2023-08-03 20:48:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:27,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:48:27,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 233 [2023-08-03 20:48:27,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 20:48:27,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:27,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 233 [2023-08-03 20:48:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:27,682 INFO L124 PetriNetUnfolderBase]: 6120/8058 cut-off events. [2023-08-03 20:48:27,682 INFO L125 PetriNetUnfolderBase]: For 928/928 co-relation queries the response was YES. [2023-08-03 20:48:27,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16949 conditions, 8058 events. 6120/8058 cut-off events. For 928/928 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35817 event pairs, 400 based on Foata normal form. 81/4992 useless extension candidates. Maximal degree in co-relation 7285. Up to 6966 conditions per place. [2023-08-03 20:48:27,735 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 52 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 20:48:27,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 316 flow [2023-08-03 20:48:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2023-08-03 20:48:27,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463519313304721 [2023-08-03 20:48:27,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2023-08-03 20:48:27,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2023-08-03 20:48:27,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:27,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2023-08-03 20:48:27,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 20:48:27,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:27,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:27,740 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 166 flow. Second operand 5 states and 540 transitions. [2023-08-03 20:48:27,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 316 flow [2023-08-03 20:48:27,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:48:27,745 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 171 flow [2023-08-03 20:48:27,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 20:48:27,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:48:27,746 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 171 flow [2023-08-03 20:48:27,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 20:48:27,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:27,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:27,751 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 20:48:27,951 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 20:48:27,951 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 20:48:27,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:27,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1709458360, now seen corresponding path program 1 times [2023-08-03 20:48:27,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:27,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322366920] [2023-08-03 20:48:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:27,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:48:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:28,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322366920] [2023-08-03 20:48:28,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322366920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:28,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568014901] [2023-08-03 20:48:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:28,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:28,013 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 20:48:28,015 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 20:48:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:28,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:48:28,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:48:28,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568014901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:28,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:28,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:48:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442367509] [2023-08-03 20:48:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:28,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:28,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:28,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 233 [2023-08-03 20:48:28,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 20:48:28,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:28,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 233 [2023-08-03 20:48:28,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:28,515 INFO L124 PetriNetUnfolderBase]: 5997/8008 cut-off events. [2023-08-03 20:48:28,515 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-03 20:48:28,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17005 conditions, 8008 events. 5997/8008 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36554 event pairs, 2243 based on Foata normal form. 0/5017 useless extension candidates. Maximal degree in co-relation 7491. Up to 5805 conditions per place. [2023-08-03 20:48:28,568 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:48:28,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 309 flow [2023-08-03 20:48:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-03 20:48:28,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892703862660944 [2023-08-03 20:48:28,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-03 20:48:28,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-03 20:48:28,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:28,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-03 20:48:28,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 20:48:28,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:28,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 20:48:28,573 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 171 flow. Second operand 3 states and 342 transitions. [2023-08-03 20:48:28,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 309 flow [2023-08-03 20:48:28,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 302 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:28,577 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 176 flow [2023-08-03 20:48:28,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-03 20:48:28,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-03 20:48:28,577 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 176 flow [2023-08-03 20:48:28,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 20:48:28,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:28,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:28,583 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 20:48:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:28,783 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 20:48:28,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash 935552544, now seen corresponding path program 1 times [2023-08-03 20:48:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124326022] [2023-08-03 20:48:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:48:28,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:28,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124326022] [2023-08-03 20:48:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124326022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:28,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823259042] [2023-08-03 20:48:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:28,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:28,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:28,856 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 20:48:28,858 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 20:48:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:28,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:28,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:48:28,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:48:28,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823259042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:28,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:28,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:48:28,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928840302] [2023-08-03 20:48:28,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:28,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:28,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 233 [2023-08-03 20:48:28,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 20:48:28,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:28,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 233 [2023-08-03 20:48:28,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:29,407 INFO L124 PetriNetUnfolderBase]: 5682/7585 cut-off events. [2023-08-03 20:48:29,407 INFO L125 PetriNetUnfolderBase]: For 1232/1232 co-relation queries the response was YES. [2023-08-03 20:48:29,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 7585 events. 5682/7585 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 34877 event pairs, 1645 based on Foata normal form. 27/4832 useless extension candidates. Maximal degree in co-relation 10425. Up to 6552 conditions per place. [2023-08-03 20:48:29,445 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 49 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 20:48:29,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 304 flow [2023-08-03 20:48:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-08-03 20:48:29,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699570815450644 [2023-08-03 20:48:29,447 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-08-03 20:48:29,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-08-03 20:48:29,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:29,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-08-03 20:48:29,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states 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 20:48:29,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:29,450 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:29,450 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 176 flow. Second operand 4 states and 438 transitions. [2023-08-03 20:48:29,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 304 flow [2023-08-03 20:48:29,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:29,470 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 172 flow [2023-08-03 20:48:29,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-03 20:48:29,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-03 20:48:29,471 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 172 flow [2023-08-03 20:48:29,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 20:48:29,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:29,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:29,476 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 20:48:29,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:29,676 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 20:48:29,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:29,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1319589363, now seen corresponding path program 1 times [2023-08-03 20:48:29,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:29,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757162876] [2023-08-03 20:48:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:29,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:29,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:29,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757162876] [2023-08-03 20:48:29,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757162876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:29,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701656490] [2023-08-03 20:48:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:29,726 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 20:48:29,728 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 20:48:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:29,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:29,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:29,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:29,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701656490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:29,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:29,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:48:29,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030327641] [2023-08-03 20:48:29,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:29,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:29,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:29,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 233 [2023-08-03 20:48:29,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 20:48:29,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:29,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 233 [2023-08-03 20:48:29,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:30,192 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-03 20:48:30,192 INFO L125 PetriNetUnfolderBase]: For 1255/1255 co-relation queries the response was YES. [2023-08-03 20:48:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11920 conditions, 5529 events. 4136/5529 cut-off events. For 1255/1255 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22931 event pairs, 747 based on Foata normal form. 108/3585 useless extension candidates. Maximal degree in co-relation 10506. Up to 2080 conditions per place. [2023-08-03 20:48:30,216 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-03 20:48:30,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 342 flow [2023-08-03 20:48:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2023-08-03 20:48:30,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47746781115879827 [2023-08-03 20:48:30,219 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2023-08-03 20:48:30,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2023-08-03 20:48:30,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:30,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2023-08-03 20:48:30,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 20:48:30,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:30,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:30,222 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 172 flow. Second operand 4 states and 445 transitions. [2023-08-03 20:48:30,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 342 flow [2023-08-03 20:48:30,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:30,229 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 186 flow [2023-08-03 20:48:30,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-03 20:48:30,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 20:48:30,230 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 186 flow [2023-08-03 20:48:30,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 20:48:30,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:30,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:30,238 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 20:48:30,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 20:48:30,434 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 20:48:30,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:30,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1562046229, now seen corresponding path program 1 times [2023-08-03 20:48:30,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:30,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865426118] [2023-08-03 20:48:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:30,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:30,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:30,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865426118] [2023-08-03 20:48:30,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865426118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:30,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247061069] [2023-08-03 20:48:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:30,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:30,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:30,494 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 20:48:30,497 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 20:48:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:30,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:30,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:30,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:30,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247061069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:30,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:30,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:48:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582449393] [2023-08-03 20:48:30,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:30,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:30,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:30,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 233 [2023-08-03 20:48:30,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 20:48:30,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:30,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 233 [2023-08-03 20:48:30,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:30,953 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-03 20:48:30,953 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-03 20:48:30,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 5502 events. 4120/5502 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22747 event pairs, 1861 based on Foata normal form. 13/3471 useless extension candidates. Maximal degree in co-relation 11152. Up to 4661 conditions per place. [2023-08-03 20:48:30,983 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-03 20:48:30,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 358 flow [2023-08-03 20:48:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2023-08-03 20:48:30,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47746781115879827 [2023-08-03 20:48:30,986 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2023-08-03 20:48:30,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2023-08-03 20:48:30,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:30,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2023-08-03 20:48:30,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 20:48:30,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:30,989 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:30,989 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 186 flow. Second operand 4 states and 445 transitions. [2023-08-03 20:48:30,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 358 flow [2023-08-03 20:48:30,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:31,000 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 190 flow [2023-08-03 20:48:31,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-03 20:48:31,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 20:48:31,000 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 190 flow [2023-08-03 20:48:31,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 20:48:31,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:31,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:31,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:31,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:31,206 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 20:48:31,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:31,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1814677515, now seen corresponding path program 1 times [2023-08-03 20:48:31,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:31,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519708886] [2023-08-03 20:48:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:31,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519708886] [2023-08-03 20:48:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519708886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:31,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:31,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:48:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946654075] [2023-08-03 20:48:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:48:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:48:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:48:31,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 233 [2023-08-03 20:48:31,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 20:48:31,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:31,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 233 [2023-08-03 20:48:31,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:31,741 INFO L124 PetriNetUnfolderBase]: 4648/6164 cut-off events. [2023-08-03 20:48:31,742 INFO L125 PetriNetUnfolderBase]: For 2579/2579 co-relation queries the response was YES. [2023-08-03 20:48:31,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14165 conditions, 6164 events. 4648/6164 cut-off events. For 2579/2579 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26566 event pairs, 1908 based on Foata normal form. 0/4096 useless extension candidates. Maximal degree in co-relation 13974. Up to 4615 conditions per place. [2023-08-03 20:48:31,767 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 65 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-03 20:48:31,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 465 flow [2023-08-03 20:48:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-08-03 20:48:31,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48283261802575106 [2023-08-03 20:48:31,769 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-08-03 20:48:31,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-08-03 20:48:31,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:31,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-08-03 20:48:31,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 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 20:48:31,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:31,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 20:48:31,772 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 190 flow. Second operand 4 states and 450 transitions. [2023-08-03 20:48:31,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 465 flow [2023-08-03 20:48:31,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 452 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:31,785 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 196 flow [2023-08-03 20:48:31,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2023-08-03 20:48:31,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-08-03 20:48:31,786 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 196 flow [2023-08-03 20:48:31,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 20:48:31,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:31,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:31,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 20:48:31,787 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 20:48:31,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:31,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1877905905, now seen corresponding path program 1 times [2023-08-03 20:48:31,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:31,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119005544] [2023-08-03 20:48:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:31,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:31,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:31,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119005544] [2023-08-03 20:48:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119005544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86602228] [2023-08-03 20:48:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:31,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:31,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:31,859 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 20:48:31,883 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 20:48:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:31,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:31,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:31,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:32,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86602228] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:32,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:32,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:48:32,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908640261] [2023-08-03 20:48:32,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:32,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:48:32,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:32,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:48:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:48:32,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 233 [2023-08-03 20:48:32,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 20:48:32,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:32,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 233 [2023-08-03 20:48:32,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:32,740 INFO L124 PetriNetUnfolderBase]: 5681/7442 cut-off events. [2023-08-03 20:48:32,741 INFO L125 PetriNetUnfolderBase]: For 4482/4482 co-relation queries the response was YES. [2023-08-03 20:48:32,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19003 conditions, 7442 events. 5681/7442 cut-off events. For 4482/4482 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 33303 event pairs, 251 based on Foata normal form. 0/5253 useless extension candidates. Maximal degree in co-relation 18797. Up to 3605 conditions per place. [2023-08-03 20:48:32,772 INFO L140 encePairwiseOnDemand]: 227/233 looper letters, 158 selfloop transitions, 11 changer transitions 0/175 dead transitions. [2023-08-03 20:48:32,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 175 transitions, 1129 flow [2023-08-03 20:48:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 20:48:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 20:48:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 892 transitions. [2023-08-03 20:48:32,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47854077253218885 [2023-08-03 20:48:32,775 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 892 transitions. [2023-08-03 20:48:32,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 892 transitions. [2023-08-03 20:48:32,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:32,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 892 transitions. [2023-08-03 20:48:32,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.5) internal successors, (892), 8 states have internal predecessors, (892), 0 states have call successors, (0), 0 states 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 20:48:32,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 233.0) internal successors, (2097), 9 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states 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 20:48:32,781 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 233.0) internal successors, (2097), 9 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states 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 20:48:32,781 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 196 flow. Second operand 8 states and 892 transitions. [2023-08-03 20:48:32,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 175 transitions, 1129 flow [2023-08-03 20:48:32,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 175 transitions, 1119 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:32,791 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 250 flow [2023-08-03 20:48:32,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-03 20:48:32,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2023-08-03 20:48:32,792 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 250 flow [2023-08-03 20:48:32,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 20:48:32,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:32,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:32,801 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 20:48:33,001 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,SelfDestructingSolverStorable13 [2023-08-03 20:48:33,002 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 20:48:33,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash 96588557, now seen corresponding path program 1 times [2023-08-03 20:48:33,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:33,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296485405] [2023-08-03 20:48:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:33,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:48:33,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:33,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296485405] [2023-08-03 20:48:33,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296485405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:33,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:33,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:48:33,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920537712] [2023-08-03 20:48:33,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:33,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:33,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:33,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 233 [2023-08-03 20:48:33,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 20:48:33,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:33,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 233 [2023-08-03 20:48:33,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:33,665 INFO L124 PetriNetUnfolderBase]: 5400/7476 cut-off events. [2023-08-03 20:48:33,666 INFO L125 PetriNetUnfolderBase]: For 7217/7287 co-relation queries the response was YES. [2023-08-03 20:48:33,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21953 conditions, 7476 events. 5400/7476 cut-off events. For 7217/7287 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 34481 event pairs, 2044 based on Foata normal form. 222/5765 useless extension candidates. Maximal degree in co-relation 21731. Up to 4943 conditions per place. [2023-08-03 20:48:33,764 INFO L140 encePairwiseOnDemand]: 228/233 looper letters, 97 selfloop transitions, 12 changer transitions 8/124 dead transitions. [2023-08-03 20:48:33,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 124 transitions, 822 flow [2023-08-03 20:48:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 568 transitions. [2023-08-03 20:48:33,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875536480686695 [2023-08-03 20:48:33,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 568 transitions. [2023-08-03 20:48:33,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 568 transitions. [2023-08-03 20:48:33,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:33,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 568 transitions. [2023-08-03 20:48:33,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 20:48:33,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:33,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:33,770 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 250 flow. Second operand 5 states and 568 transitions. [2023-08-03 20:48:33,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 124 transitions, 822 flow [2023-08-03 20:48:33,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 124 transitions, 803 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:33,808 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 298 flow [2023-08-03 20:48:33,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2023-08-03 20:48:33,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2023-08-03 20:48:33,809 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 298 flow [2023-08-03 20:48:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 20:48:33,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:33,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:33,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 20:48:33,809 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 20:48:33,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1350417735, now seen corresponding path program 2 times [2023-08-03 20:48:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:33,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668852717] [2023-08-03 20:48:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:33,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668852717] [2023-08-03 20:48:33,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668852717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072331413] [2023-08-03 20:48:33,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:48:33,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:33,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:33,892 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 20:48:33,917 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 20:48:33,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:48:33,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:48:33,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:33,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:34,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:34,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072331413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:34,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:34,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:48:34,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852708315] [2023-08-03 20:48:34,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:48:34,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:48:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:48:34,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 233 [2023-08-03 20:48:34,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 97.5) internal successors, (780), 8 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 20:48:34,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:34,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 233 [2023-08-03 20:48:34,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:34,947 INFO L124 PetriNetUnfolderBase]: 6341/8539 cut-off events. [2023-08-03 20:48:34,947 INFO L125 PetriNetUnfolderBase]: For 10874/11145 co-relation queries the response was YES. [2023-08-03 20:48:34,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27770 conditions, 8539 events. 6341/8539 cut-off events. For 10874/11145 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 39283 event pairs, 468 based on Foata normal form. 356/6873 useless extension candidates. Maximal degree in co-relation 27524. Up to 3902 conditions per place. [2023-08-03 20:48:34,987 INFO L140 encePairwiseOnDemand]: 227/233 looper letters, 149 selfloop transitions, 23 changer transitions 0/179 dead transitions. [2023-08-03 20:48:34,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 179 transitions, 1237 flow [2023-08-03 20:48:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 20:48:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 20:48:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 887 transitions. [2023-08-03 20:48:34,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47585836909871243 [2023-08-03 20:48:34,990 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 887 transitions. [2023-08-03 20:48:34,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 887 transitions. [2023-08-03 20:48:34,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:34,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 887 transitions. [2023-08-03 20:48:34,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 0 states have call successors, (0), 0 states 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 20:48:34,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 233.0) internal successors, (2097), 9 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states 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 20:48:34,996 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 233.0) internal successors, (2097), 9 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states 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 20:48:34,996 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 298 flow. Second operand 8 states and 887 transitions. [2023-08-03 20:48:34,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 179 transitions, 1237 flow [2023-08-03 20:48:35,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 179 transitions, 1220 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:35,025 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 417 flow [2023-08-03 20:48:35,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=417, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2023-08-03 20:48:35,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2023-08-03 20:48:35,026 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 417 flow [2023-08-03 20:48:35,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 97.5) internal successors, (780), 8 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 20:48:35,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:35,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:35,034 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 20:48:35,231 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 20:48:35,232 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 20:48:35,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1222444949, now seen corresponding path program 1 times [2023-08-03 20:48:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180762863] [2023-08-03 20:48:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:35,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:35,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:35,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180762863] [2023-08-03 20:48:35,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180762863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:35,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183952569] [2023-08-03 20:48:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:35,348 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:35,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 20:48:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:35,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:35,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:35,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:35,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183952569] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:35,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:35,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:48:35,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511337136] [2023-08-03 20:48:35,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:35,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:48:35,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:48:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:48:35,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 233 [2023-08-03 20:48:35,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 417 flow. Second operand has 8 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 20:48:35,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:35,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 233 [2023-08-03 20:48:35,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:36,386 INFO L124 PetriNetUnfolderBase]: 7274/9814 cut-off events. [2023-08-03 20:48:36,387 INFO L125 PetriNetUnfolderBase]: For 21958/23203 co-relation queries the response was YES. [2023-08-03 20:48:36,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37999 conditions, 9814 events. 7274/9814 cut-off events. For 21958/23203 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 45749 event pairs, 584 based on Foata normal form. 554/8347 useless extension candidates. Maximal degree in co-relation 37731. Up to 4782 conditions per place. [2023-08-03 20:48:36,533 INFO L140 encePairwiseOnDemand]: 227/233 looper letters, 182 selfloop transitions, 15 changer transitions 0/210 dead transitions. [2023-08-03 20:48:36,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 210 transitions, 1669 flow [2023-08-03 20:48:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 20:48:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 20:48:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 885 transitions. [2023-08-03 20:48:36,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4747854077253219 [2023-08-03 20:48:36,536 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 885 transitions. [2023-08-03 20:48:36,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 885 transitions. [2023-08-03 20:48:36,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:36,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 885 transitions. [2023-08-03 20:48:36,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 110.625) internal successors, (885), 8 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 20:48:36,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 233.0) internal successors, (2097), 9 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states 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 20:48:36,541 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 233.0) internal successors, (2097), 9 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states 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 20:48:36,541 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 417 flow. Second operand 8 states and 885 transitions. [2023-08-03 20:48:36,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 210 transitions, 1669 flow [2023-08-03 20:48:36,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 210 transitions, 1579 flow, removed 32 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:36,590 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 474 flow [2023-08-03 20:48:36,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=474, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2023-08-03 20:48:36,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2023-08-03 20:48:36,591 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 474 flow [2023-08-03 20:48:36,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 20:48:36,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:36,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:36,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-03 20:48:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 20:48:36,794 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:36,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash -955459101, now seen corresponding path program 1 times [2023-08-03 20:48:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:36,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978949138] [2023-08-03 20:48:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:48:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:36,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978949138] [2023-08-03 20:48:36,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978949138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:36,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609993409] [2023-08-03 20:48:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:36,882 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:36,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 20:48:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:36,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:36,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:48:37,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:48:37,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609993409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:37,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:37,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 20:48:37,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644807152] [2023-08-03 20:48:37,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:37,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:48:37,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:48:37,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:48:37,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 233 [2023-08-03 20:48:37,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 474 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 20:48:37,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:37,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 233 [2023-08-03 20:48:37,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:37,922 INFO L124 PetriNetUnfolderBase]: 7697/10546 cut-off events. [2023-08-03 20:48:37,922 INFO L125 PetriNetUnfolderBase]: For 25736/27013 co-relation queries the response was YES. [2023-08-03 20:48:37,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43473 conditions, 10546 events. 7697/10546 cut-off events. For 25736/27013 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 51080 event pairs, 1629 based on Foata normal form. 885/9313 useless extension candidates. Maximal degree in co-relation 43245. Up to 8343 conditions per place. [2023-08-03 20:48:37,989 INFO L140 encePairwiseOnDemand]: 228/233 looper letters, 113 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2023-08-03 20:48:37,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 1172 flow [2023-08-03 20:48:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 568 transitions. [2023-08-03 20:48:37,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875536480686695 [2023-08-03 20:48:37,990 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 568 transitions. [2023-08-03 20:48:37,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 568 transitions. [2023-08-03 20:48:37,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:37,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 568 transitions. [2023-08-03 20:48:37,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 20:48:37,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:37,993 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states 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 20:48:37,994 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 474 flow. Second operand 5 states and 568 transitions. [2023-08-03 20:48:37,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 1172 flow [2023-08-03 20:48:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 1143 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:38,043 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 629 flow [2023-08-03 20:48:38,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=629, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2023-08-03 20:48:38,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2023-08-03 20:48:38,044 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 629 flow [2023-08-03 20:48:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 20:48:38,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:38,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:38,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:38,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-03 20:48:38,245 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:38,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1220022299, now seen corresponding path program 1 times [2023-08-03 20:48:38,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:38,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235433955] [2023-08-03 20:48:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:38,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-03 20:48:38,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235433955] [2023-08-03 20:48:38,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235433955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:38,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821158541] [2023-08-03 20:48:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:38,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:38,347 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 20:48:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:38,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:38,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-03 20:48:38,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-03 20:48:38,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821158541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:38,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:38,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2023-08-03 20:48:38,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238836462] [2023-08-03 20:48:38,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:38,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 20:48:38,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:38,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 20:48:38,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:48:38,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 233 [2023-08-03 20:48:38,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 629 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 20:48:38,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:38,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 233 [2023-08-03 20:48:38,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:39,508 INFO L124 PetriNetUnfolderBase]: 8425/11630 cut-off events. [2023-08-03 20:48:39,508 INFO L125 PetriNetUnfolderBase]: For 41841/44486 co-relation queries the response was YES. [2023-08-03 20:48:39,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50214 conditions, 11630 events. 8425/11630 cut-off events. For 41841/44486 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 56641 event pairs, 2644 based on Foata normal form. 1194/10984 useless extension candidates. Maximal degree in co-relation 49964. Up to 9500 conditions per place. [2023-08-03 20:48:39,594 INFO L140 encePairwiseOnDemand]: 227/233 looper letters, 112 selfloop transitions, 42 changer transitions 0/171 dead transitions. [2023-08-03 20:48:39,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 171 transitions, 1550 flow [2023-08-03 20:48:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 20:48:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 20:48:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 660 transitions. [2023-08-03 20:48:39,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721030042918455 [2023-08-03 20:48:39,596 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 660 transitions. [2023-08-03 20:48:39,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 660 transitions. [2023-08-03 20:48:39,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:39,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 660 transitions. [2023-08-03 20:48:39,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 20:48:39,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states 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 20:48:39,600 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states 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 20:48:39,600 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 629 flow. Second operand 6 states and 660 transitions. [2023-08-03 20:48:39,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 171 transitions, 1550 flow [2023-08-03 20:48:39,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1507 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:39,709 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 981 flow [2023-08-03 20:48:39,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=981, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2023-08-03 20:48:39,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2023-08-03 20:48:39,709 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 981 flow [2023-08-03 20:48:39,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 20:48:39,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:39,709 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:39,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:39,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:39,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:39,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:39,911 INFO L85 PathProgramCache]: Analyzing trace with hash 684198557, now seen corresponding path program 2 times [2023-08-03 20:48:39,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:39,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929640603] [2023-08-03 20:48:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:39,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-03 20:48:40,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929640603] [2023-08-03 20:48:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929640603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154651586] [2023-08-03 20:48:40,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:48:40,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:40,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:40,097 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:40,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-03 20:48:40,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:48:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:48:40,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-03 20:48:40,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-03 20:48:40,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:48:40,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154651586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:40,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:40,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 6, 8] total 14 [2023-08-03 20:48:40,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870417245] [2023-08-03 20:48:40,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:40,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 20:48:40,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 20:48:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2023-08-03 20:48:40,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 233 [2023-08-03 20:48:40,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 981 flow. Second operand has 16 states, 16 states have (on average 95.9375) internal successors, (1535), 16 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states 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 20:48:40,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:40,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 233 [2023-08-03 20:48:40,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:51,650 INFO L124 PetriNetUnfolderBase]: 68040/93484 cut-off events. [2023-08-03 20:48:51,650 INFO L125 PetriNetUnfolderBase]: For 372785/383741 co-relation queries the response was YES. [2023-08-03 20:48:52,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403006 conditions, 93484 events. 68040/93484 cut-off events. For 372785/383741 co-relation queries the response was YES. Maximal size of possible extension queue 2381. Compared 599366 event pairs, 5180 based on Foata normal form. 4855/85718 useless extension candidates. Maximal degree in co-relation 402295. Up to 16790 conditions per place. [2023-08-03 20:48:52,723 INFO L140 encePairwiseOnDemand]: 223/233 looper letters, 703 selfloop transitions, 232 changer transitions 13/961 dead transitions. [2023-08-03 20:48:52,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 961 transitions, 8000 flow [2023-08-03 20:48:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-03 20:48:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-03 20:48:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3035 transitions. [2023-08-03 20:48:52,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009904258831297 [2023-08-03 20:48:52,729 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3035 transitions. [2023-08-03 20:48:52,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3035 transitions. [2023-08-03 20:48:52,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:52,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3035 transitions. [2023-08-03 20:48:52,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 116.73076923076923) internal successors, (3035), 26 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:48:52,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 233.0) internal successors, (6291), 27 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states 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 20:48:52,745 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 233.0) internal successors, (6291), 27 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states 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 20:48:52,745 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 981 flow. Second operand 26 states and 3035 transitions. [2023-08-03 20:48:52,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 961 transitions, 8000 flow [2023-08-03 20:48:54,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 961 transitions, 7867 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:54,798 INFO L231 Difference]: Finished difference. Result has 145 places, 318 transitions, 3278 flow [2023-08-03 20:48:54,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3278, PETRI_PLACES=145, PETRI_TRANSITIONS=318} [2023-08-03 20:48:54,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2023-08-03 20:48:54,799 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 318 transitions, 3278 flow [2023-08-03 20:48:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 95.9375) internal successors, (1535), 16 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states 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 20:48:54,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:54,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:54,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:55,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:55,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:55,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1754400519, now seen corresponding path program 3 times [2023-08-03 20:48:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216087796] [2023-08-03 20:48:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:55,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:48:55,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:55,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216087796] [2023-08-03 20:48:55,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216087796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:55,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199763870] [2023-08-03 20:48:55,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 20:48:55,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:55,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:55,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:55,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-03 20:48:55,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-03 20:48:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:48:55,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 20:48:55,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:48:55,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:48:55,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199763870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:55,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:55,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-03 20:48:55,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921709424] [2023-08-03 20:48:55,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:55,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-03 20:48:55,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:55,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-03 20:48:55,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-03 20:48:55,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 233 [2023-08-03 20:48:55,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 318 transitions, 3278 flow. Second operand has 18 states, 18 states have (on average 95.83333333333333) internal successors, (1725), 18 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states 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 20:48:55,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:55,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 233 [2023-08-03 20:48:55,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:49:20,717 INFO L124 PetriNetUnfolderBase]: 118302/162738 cut-off events. [2023-08-03 20:49:20,717 INFO L125 PetriNetUnfolderBase]: For 2385271/2402067 co-relation queries the response was YES. [2023-08-03 20:49:22,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045172 conditions, 162738 events. 118302/162738 cut-off events. For 2385271/2402067 co-relation queries the response was YES. Maximal size of possible extension queue 4037. Compared 1113999 event pairs, 9284 based on Foata normal form. 15184/177741 useless extension candidates. Maximal degree in co-relation 1044064. Up to 38586 conditions per place. [2023-08-03 20:49:23,777 INFO L140 encePairwiseOnDemand]: 224/233 looper letters, 791 selfloop transitions, 542 changer transitions 34/1380 dead transitions. [2023-08-03 20:49:23,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 1380 transitions, 15465 flow [2023-08-03 20:49:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-03 20:49:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-03 20:49:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3917 transitions. [2023-08-03 20:49:23,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944458470083312 [2023-08-03 20:49:23,784 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3917 transitions. [2023-08-03 20:49:23,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3917 transitions. [2023-08-03 20:49:23,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:49:23,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3917 transitions. [2023-08-03 20:49:23,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 115.20588235294117) internal successors, (3917), 34 states have internal predecessors, (3917), 0 states have call successors, (0), 0 states 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 20:49:23,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 233.0) internal successors, (8155), 35 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states 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 20:49:23,804 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 233.0) internal successors, (8155), 35 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states 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 20:49:23,804 INFO L175 Difference]: Start difference. First operand has 145 places, 318 transitions, 3278 flow. Second operand 34 states and 3917 transitions. [2023-08-03 20:49:23,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 1380 transitions, 15465 flow [2023-08-03 20:50:10,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 1380 transitions, 15229 flow, removed 118 selfloop flow, removed 0 redundant places. [2023-08-03 20:50:11,011 INFO L231 Difference]: Finished difference. Result has 203 places, 657 transitions, 9039 flow [2023-08-03 20:50:11,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9039, PETRI_PLACES=203, PETRI_TRANSITIONS=657} [2023-08-03 20:50:11,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2023-08-03 20:50:11,012 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 657 transitions, 9039 flow [2023-08-03 20:50:11,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.83333333333333) internal successors, (1725), 18 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states 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 20:50:11,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:50:11,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:50:11,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-03 20:50:11,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:50:11,219 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:50:11,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:50:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1302042009, now seen corresponding path program 4 times [2023-08-03 20:50:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:50:11,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680116593] [2023-08-03 20:50:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:50:11,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:50:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:50:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:50:11,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:50:11,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680116593] [2023-08-03 20:50:11,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680116593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:50:11,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051327688] [2023-08-03 20:50:11,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 20:50:11,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:50:11,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:50:11,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:50:11,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-03 20:50:11,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 20:50:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:50:11,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 20:50:11,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:50:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:50:11,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:50:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:50:11,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051327688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:50:11,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:50:11,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-03 20:50:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866120475] [2023-08-03 20:50:11,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:50:11,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 20:50:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:50:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 20:50:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-03 20:50:11,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 233 [2023-08-03 20:50:11,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 657 transitions, 9039 flow. Second operand has 17 states, 17 states have (on average 95.52941176470588) internal successors, (1624), 17 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 20:50:11,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:50:11,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 233 [2023-08-03 20:50:11,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:51:00,821 INFO L124 PetriNetUnfolderBase]: 166707/227926 cut-off events. [2023-08-03 20:51:00,821 INFO L125 PetriNetUnfolderBase]: For 9145662/9167830 co-relation queries the response was YES. [2023-08-03 20:51:04,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984770 conditions, 227926 events. 166707/227926 cut-off events. For 9145662/9167830 co-relation queries the response was YES. Maximal size of possible extension queue 5524. Compared 1602587 event pairs, 11338 based on Foata normal form. 26797/252935 useless extension candidates. Maximal degree in co-relation 1983383. Up to 56962 conditions per place. [2023-08-03 20:51:06,630 INFO L140 encePairwiseOnDemand]: 224/233 looper letters, 1038 selfloop transitions, 1025 changer transitions 42/2142 dead transitions. [2023-08-03 20:51:06,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 2142 transitions, 30952 flow [2023-08-03 20:51:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-03 20:51:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-03 20:51:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4289 transitions. [2023-08-03 20:51:06,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975060897807679 [2023-08-03 20:51:06,636 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4289 transitions. [2023-08-03 20:51:06,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4289 transitions. [2023-08-03 20:51:06,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:51:06,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4289 transitions. [2023-08-03 20:51:06,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 115.91891891891892) internal successors, (4289), 37 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states 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 20:51:06,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 233.0) internal successors, (8854), 38 states have internal predecessors, (8854), 0 states have call successors, (0), 0 states 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 20:51:06,657 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 233.0) internal successors, (8854), 38 states have internal predecessors, (8854), 0 states have call successors, (0), 0 states 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 20:51:06,657 INFO L175 Difference]: Start difference. First operand has 203 places, 657 transitions, 9039 flow. Second operand 37 states and 4289 transitions. [2023-08-03 20:51:06,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 2142 transitions, 30952 flow [2023-08-03 20:56:49,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 2142 transitions, 29604 flow, removed 674 selfloop flow, removed 0 redundant places. [2023-08-03 20:56:49,289 INFO L231 Difference]: Finished difference. Result has 268 places, 1206 transitions, 19634 flow [2023-08-03 20:56:49,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=8435, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=19634, PETRI_PLACES=268, PETRI_TRANSITIONS=1206} [2023-08-03 20:56:49,289 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2023-08-03 20:56:49,290 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 1206 transitions, 19634 flow [2023-08-03 20:56:49,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 95.52941176470588) internal successors, (1624), 17 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 20:56:49,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:56:49,290 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:56:49,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-03 20:56:49,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:56:49,496 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:56:49,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:56:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2130408349, now seen corresponding path program 5 times [2023-08-03 20:56:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:56:49,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782721128] [2023-08-03 20:56:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:56:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:56:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:56:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:56:49,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:56:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782721128] [2023-08-03 20:56:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782721128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:56:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215756798] [2023-08-03 20:56:49,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-03 20:56:49,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:56:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:56:49,757 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:56:49,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-03 20:56:49,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-03 20:56:49,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:56:49,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 20:56:49,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:56:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:56:50,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:56:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:56:50,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215756798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:56:50,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:56:50,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 15 [2023-08-03 20:56:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739638605] [2023-08-03 20:56:50,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:56:50,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 20:56:50,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:56:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 20:56:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-03 20:56:50,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 233 [2023-08-03 20:56:50,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 1206 transitions, 19634 flow. Second operand has 17 states, 17 states have (on average 95.52941176470588) internal successors, (1624), 17 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 20:56:50,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:56:50,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 233 [2023-08-03 20:56:50,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand