/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-figure1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:26:58,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:26:58,493 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:26:58,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:26:58,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:26:58,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:26:58,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:26:58,521 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:26:58,522 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:26:58,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:26:58,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:26:58,525 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:26:58,525 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:26:58,526 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:26:58,526 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:26:58,526 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:26:58,527 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:26:58,527 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:26:58,527 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:26:58,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:26:58,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:26:58,527 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:26:58,527 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:26:58,528 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:26:58,528 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:26:58,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:26:58,528 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:26:58,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:26:58,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:26:58,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:26:58,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:26:58,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:26:58,530 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:26:58,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:26:58,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:26:58,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:26:58,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:26:58,730 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:26:58,730 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:26:58,731 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-figure1.wvr_bound2.c [2023-08-03 20:26:59,663 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:26:59,811 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:26:59,811 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-figure1.wvr_bound2.c [2023-08-03 20:26:59,816 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178de1f0c/84a16027e5b543938719d6154b14887e/FLAGc4ec1d4ff [2023-08-03 20:26:59,828 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178de1f0c/84a16027e5b543938719d6154b14887e [2023-08-03 20:26:59,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:26:59,833 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:26:59,835 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:26:59,835 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:26:59,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:26:59,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:26:59" (1/1) ... [2023-08-03 20:26:59,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34da0ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:26:59, skipping insertion in model container [2023-08-03 20:26:59,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:26:59" (1/1) ... [2023-08-03 20:26:59,856 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:26:59,996 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-figure1.wvr_bound2.c[2153,2166] [2023-08-03 20:26:59,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:27:00,004 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:27:00,016 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-figure1.wvr_bound2.c[2153,2166] [2023-08-03 20:27:00,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:27:00,022 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:27:00,022 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:27:00,026 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:27:00,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00 WrapperNode [2023-08-03 20:27:00,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:27:00,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:27:00,028 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:27:00,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:27:00,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,036 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,050 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 101 [2023-08-03 20:27:00,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:27:00,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:27:00,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:27:00,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:27:00,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,064 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,065 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:27:00,066 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:27:00,066 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:27:00,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:27:00,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (1/1) ... [2023-08-03 20:27:00,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:27:00,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:00,087 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 20:27:00,088 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 20:27:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:27:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:27:00,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:27:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:27:00,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:27:00,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:27:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:27:00,111 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 20:27:00,169 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:27:00,170 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:27:00,287 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:27:00,307 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:27:00,307 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 20:27:00,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:27:00 BoogieIcfgContainer [2023-08-03 20:27:00,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:27:00,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:27:00,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:27:00,312 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:27:00,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:26:59" (1/3) ... [2023-08-03 20:27:00,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1c6f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:27:00, skipping insertion in model container [2023-08-03 20:27:00,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:27:00" (2/3) ... [2023-08-03 20:27:00,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1c6f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:27:00, skipping insertion in model container [2023-08-03 20:27:00,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:27:00" (3/3) ... [2023-08-03 20:27:00,314 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-figure1.wvr_bound2.c [2023-08-03 20:27:00,319 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:27:00,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:27:00,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:27:00,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:27:00,357 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:27:00,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 103 transitions, 228 flow [2023-08-03 20:27:00,433 INFO L124 PetriNetUnfolderBase]: 32/243 cut-off events. [2023-08-03 20:27:00,433 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:27:00,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 32/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 849 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 121. Up to 8 conditions per place. [2023-08-03 20:27:00,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 103 transitions, 228 flow [2023-08-03 20:27:00,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 103 transitions, 228 flow [2023-08-03 20:27:00,443 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:27:00,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 103 transitions, 228 flow [2023-08-03 20:27:00,450 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 103 transitions, 228 flow [2023-08-03 20:27:00,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 103 transitions, 228 flow [2023-08-03 20:27:00,483 INFO L124 PetriNetUnfolderBase]: 32/243 cut-off events. [2023-08-03 20:27:00,483 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:27:00,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 32/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 849 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 121. Up to 8 conditions per place. [2023-08-03 20:27:00,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-03 20:27:02,027 INFO L134 LiptonReduction]: Checked pairs total: 2862 [2023-08-03 20:27:02,027 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-03 20:27:02,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:27:02,044 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;@62063897, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:27:02,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:27:02,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:27:02,046 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 20:27:02,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:27:02,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:02,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:27:02,047 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 20:27:02,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash 400620491, now seen corresponding path program 1 times [2023-08-03 20:27:02,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:02,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694177623] [2023-08-03 20:27:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:02,184 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 20:27:02,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:02,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694177623] [2023-08-03 20:27:02,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694177623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:02,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:02,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:27:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889531002] [2023-08-03 20:27:02,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:02,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:27:02,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:27:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:27:02,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 187 [2023-08-03 20:27:02,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 20:27:02,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:02,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 187 [2023-08-03 20:27:02,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:02,273 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-03 20:27:02,273 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 20:27:02,274 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 35. Compared 1609 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 20:27:02,276 INFO L140 encePairwiseOnDemand]: 183/187 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 20:27:02,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-03 20:27:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:27:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:27:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-03 20:27:02,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49376114081996436 [2023-08-03 20:27:02,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-03 20:27:02,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-03 20:27:02,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:02,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-03 20:27:02,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 20:27:02,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 20:27:02,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 20:27:02,295 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 277 transitions. [2023-08-03 20:27:02,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-03 20:27:02,297 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 20:27:02,298 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 88 flow [2023-08-03 20:27:02,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, 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 20:27:02,301 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 20:27:02,301 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 88 flow [2023-08-03 20:27:02,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 20:27:02,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:02,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 20:27:02,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:27:02,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:02,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash -438439530, now seen corresponding path program 1 times [2023-08-03 20:27:02,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:02,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364939312] [2023-08-03 20:27:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:27:02,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:27:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:27:02,333 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:27:02,333 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:27:02,334 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:27:02,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:27:02,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:27:02,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:27:02,336 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:27:02,337 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:27:02,337 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:27:02,359 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:27:02,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 306 flow [2023-08-03 20:27:02,408 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-03 20:27:02,408 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:27:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4225 event pairs, 1 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 476. Up to 32 conditions per place. [2023-08-03 20:27:02,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 129 transitions, 306 flow [2023-08-03 20:27:02,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 129 transitions, 306 flow [2023-08-03 20:27:02,415 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:27:02,415 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 129 transitions, 306 flow [2023-08-03 20:27:02,415 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 129 transitions, 306 flow [2023-08-03 20:27:02,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 306 flow [2023-08-03 20:27:02,458 INFO L124 PetriNetUnfolderBase]: 133/818 cut-off events. [2023-08-03 20:27:02,458 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:27:02,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 818 events. 133/818 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4225 event pairs, 1 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 476. Up to 32 conditions per place. [2023-08-03 20:27:02,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-03 20:27:04,164 INFO L134 LiptonReduction]: Checked pairs total: 8525 [2023-08-03 20:27:04,164 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-03 20:27:04,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:27:04,167 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;@62063897, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:27:04,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:27:04,169 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:27:04,169 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 20:27:04,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:27:04,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:04,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:27:04,169 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 20:27:04,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash 641902948, now seen corresponding path program 1 times [2023-08-03 20:27:04,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:04,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920077071] [2023-08-03 20:27:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:04,197 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 20:27:04,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:04,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920077071] [2023-08-03 20:27:04,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920077071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:04,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:04,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:27:04,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424543448] [2023-08-03 20:27:04,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:04,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:27:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:04,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:27:04,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:27:04,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 227 [2023-08-03 20:27:04,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 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 20:27:04,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:04,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 227 [2023-08-03 20:27:04,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:04,728 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-03 20:27:04,728 INFO L125 PetriNetUnfolderBase]: For 988/988 co-relation queries the response was YES. [2023-08-03 20:27:04,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 988/988 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 47856 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 20:27:04,774 INFO L140 encePairwiseOnDemand]: 223/227 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-03 20:27:04,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-03 20:27:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:27:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:27:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-03 20:27:04,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933920704845815 [2023-08-03 20:27:04,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-03 20:27:04,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-03 20:27:04,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:04,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-03 20:27:04,778 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 20:27:04,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:04,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:04,779 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 336 transitions. [2023-08-03 20:27:04,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-03 20:27:04,781 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 20:27:04,782 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 146 flow [2023-08-03 20:27:04,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:04,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-03 20:27:04,782 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 146 flow [2023-08-03 20:27:04,783 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 20:27:04,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:04,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:27:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:27:04,783 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 20:27:04,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1432756354, now seen corresponding path program 1 times [2023-08-03 20:27:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:04,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962749922] [2023-08-03 20:27:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:04,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:04,835 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 20:27:04,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962749922] [2023-08-03 20:27:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962749922] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972533236] [2023-08-03 20:27:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:04,843 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 20:27:04,880 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 20:27:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:04,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:27:04,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:04,926 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 20:27:04,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:27:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972533236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:04,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:27:04,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:27:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960305685] [2023-08-03 20:27:04,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:04,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:27:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:27:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:04,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 227 [2023-08-03 20:27:04,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 146 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 20:27:04,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:04,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 227 [2023-08-03 20:27:04,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:05,527 INFO L124 PetriNetUnfolderBase]: 8488/11053 cut-off events. [2023-08-03 20:27:05,529 INFO L125 PetriNetUnfolderBase]: For 871/871 co-relation queries the response was YES. [2023-08-03 20:27:05,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22377 conditions, 11053 events. 8488/11053 cut-off events. For 871/871 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49914 event pairs, 3438 based on Foata normal form. 0/6301 useless extension candidates. Maximal degree in co-relation 13501. Up to 10389 conditions per place. [2023-08-03 20:27:05,565 INFO L140 encePairwiseOnDemand]: 224/227 looper letters, 40 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 20:27:05,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 246 flow [2023-08-03 20:27:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:27:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:27:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-03 20:27:05,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4977973568281938 [2023-08-03 20:27:05,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-03 20:27:05,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-03 20:27:05,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:05,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-03 20:27:05,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 20:27:05,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:05,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:05,569 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 146 flow. Second operand 3 states and 339 transitions. [2023-08-03 20:27:05,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 246 flow [2023-08-03 20:27:05,571 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 20:27:05,571 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2023-08-03 20:27:05,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:05,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-03 20:27:05,572 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2023-08-03 20:27:05,572 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 20:27:05,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:05,572 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 20:27:05,590 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 20:27:05,777 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 20:27:05,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:05,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2005117216, now seen corresponding path program 1 times [2023-08-03 20:27:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:05,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125375126] [2023-08-03 20:27:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:05,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:05,883 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 20:27:05,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125375126] [2023-08-03 20:27:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125375126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939271282] [2023-08-03 20:27:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:05,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:05,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:05,888 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 20:27:05,888 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 20:27:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:05,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:05,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:05,970 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 20:27:05,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:27:05,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939271282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:05,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:27:05,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 20:27:05,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664578106] [2023-08-03 20:27:05,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:05,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:27:05,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 227 [2023-08-03 20:27:05,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 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 20:27:05,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:05,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 227 [2023-08-03 20:27:05,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:06,519 INFO L124 PetriNetUnfolderBase]: 8480/11030 cut-off events. [2023-08-03 20:27:06,519 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2023-08-03 20:27:06,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22615 conditions, 11030 events. 8480/11030 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 49320 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 20:27:06,562 INFO L140 encePairwiseOnDemand]: 223/227 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-03 20:27:06,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 257 flow [2023-08-03 20:27:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 533 transitions. [2023-08-03 20:27:06,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46960352422907486 [2023-08-03 20:27:06,564 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 533 transitions. [2023-08-03 20:27:06,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 533 transitions. [2023-08-03 20:27:06,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:06,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 533 transitions. [2023-08-03 20:27:06,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 20:27:06,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:06,567 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:06,567 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 5 states and 533 transitions. [2023-08-03 20:27:06,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 257 flow [2023-08-03 20:27:06,569 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 20:27:06,570 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 165 flow [2023-08-03 20:27:06,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:06,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-03 20:27:06,571 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 165 flow [2023-08-03 20:27:06,571 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 20:27:06,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:06,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:27:06,576 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 20:27:06,776 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 20:27:06,776 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 20:27:06,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2145297218, now seen corresponding path program 1 times [2023-08-03 20:27:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:06,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011266293] [2023-08-03 20:27:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:06,837 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 20:27:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:06,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011266293] [2023-08-03 20:27:06,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011266293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:06,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620996234] [2023-08-03 20:27:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:06,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:06,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:06,841 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 20:27:06,846 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 20:27:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:06,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:27:06,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:06,894 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 20:27:06,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:27:06,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620996234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:06,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:27:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:27:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940525523] [2023-08-03 20:27:06,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:06,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:27:06,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:27:06,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:06,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 227 [2023-08-03 20:27:06,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 20:27:06,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:06,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 227 [2023-08-03 20:27:06,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:07,442 INFO L124 PetriNetUnfolderBase]: 7233/9555 cut-off events. [2023-08-03 20:27:07,442 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2023-08-03 20:27:07,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19560 conditions, 9555 events. 7233/9555 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43646 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 20:27:07,471 INFO L140 encePairwiseOnDemand]: 224/227 looper letters, 48 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:27:07,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 303 flow [2023-08-03 20:27:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:27:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:27:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-03 20:27:07,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066079295154186 [2023-08-03 20:27:07,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-03 20:27:07,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-03 20:27:07,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:07,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-03 20:27:07,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 20:27:07,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:07,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:07,475 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 165 flow. Second operand 3 states and 345 transitions. [2023-08-03 20:27:07,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 303 flow [2023-08-03 20:27:07,478 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 20:27:07,479 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 170 flow [2023-08-03 20:27:07,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:07,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 20:27:07,481 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 170 flow [2023-08-03 20:27:07,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 20:27:07,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:07,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:27:07,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 20:27:07,686 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 20:27:07,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:07,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:07,689 INFO L85 PathProgramCache]: Analyzing trace with hash -813497558, now seen corresponding path program 1 times [2023-08-03 20:27:07,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:07,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320286036] [2023-08-03 20:27:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:07,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:07,749 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 20:27:07,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320286036] [2023-08-03 20:27:07,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320286036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:07,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618770069] [2023-08-03 20:27:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:07,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:07,756 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 20:27:07,757 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 20:27:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:07,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:27:07,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:07,814 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 20:27:07,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:07,828 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 20:27:07,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618770069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:07,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:27:07,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866736208] [2023-08-03 20:27:07,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:07,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:07,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 227 [2023-08-03 20:27:07,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 20:27:07,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:07,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 227 [2023-08-03 20:27:07,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:08,254 INFO L124 PetriNetUnfolderBase]: 6552/8619 cut-off events. [2023-08-03 20:27:08,255 INFO L125 PetriNetUnfolderBase]: For 1237/1237 co-relation queries the response was YES. [2023-08-03 20:27:08,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 8619 events. 6552/8619 cut-off events. For 1237/1237 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38212 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 20:27:08,280 INFO L140 encePairwiseOnDemand]: 224/227 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-03 20:27:08,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 264 flow [2023-08-03 20:27:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:27:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:27:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2023-08-03 20:27:08,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779735682819383 [2023-08-03 20:27:08,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2023-08-03 20:27:08,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2023-08-03 20:27:08,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:08,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2023-08-03 20:27:08,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 20:27:08,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:08,284 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:08,284 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 170 flow. Second operand 4 states and 434 transitions. [2023-08-03 20:27:08,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 264 flow [2023-08-03 20:27:08,287 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 20:27:08,287 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 166 flow [2023-08-03 20:27:08,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:08,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:27:08,288 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 166 flow [2023-08-03 20:27:08,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 20:27:08,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:08,288 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:27:08,293 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 20:27:08,492 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 20:27:08,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:08,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash 563520111, now seen corresponding path program 1 times [2023-08-03 20:27:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:08,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121699443] [2023-08-03 20:27:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:08,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:08,537 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 20:27:08,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:08,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121699443] [2023-08-03 20:27:08,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121699443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:08,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071593858] [2023-08-03 20:27:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:08,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:08,538 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 20:27:08,541 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 20:27:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:08,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:08,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:08,609 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 20:27:08,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:27:08,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071593858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:08,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:27:08,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:27:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52568900] [2023-08-03 20:27:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:08,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:27:08,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 227 [2023-08-03 20:27:08,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 20:27:08,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:08,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 227 [2023-08-03 20:27:08,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:08,992 INFO L124 PetriNetUnfolderBase]: 6120/8042 cut-off events. [2023-08-03 20:27:08,992 INFO L125 PetriNetUnfolderBase]: For 936/936 co-relation queries the response was YES. [2023-08-03 20:27:08,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16933 conditions, 8042 events. 6120/8042 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35248 event pairs, 400 based on Foata normal form. 81/4976 useless extension candidates. Maximal degree in co-relation 7277. Up to 6966 conditions per place. [2023-08-03 20:27:09,016 INFO L140 encePairwiseOnDemand]: 223/227 looper letters, 52 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 20:27:09,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 316 flow [2023-08-03 20:27:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 545 transitions. [2023-08-03 20:27:09,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801762114537445 [2023-08-03 20:27:09,018 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 545 transitions. [2023-08-03 20:27:09,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 545 transitions. [2023-08-03 20:27:09,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:09,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 545 transitions. [2023-08-03 20:27:09,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 20:27:09,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:09,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:09,022 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 166 flow. Second operand 5 states and 545 transitions. [2023-08-03 20:27:09,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 316 flow [2023-08-03 20:27:09,025 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 20:27:09,027 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 171 flow [2023-08-03 20:27:09,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:09,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:27:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 171 flow [2023-08-03 20:27:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 20:27:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:09,028 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 20:27:09,032 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 20:27:09,232 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 20:27:09,233 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 20:27:09,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:09,233 INFO L85 PathProgramCache]: Analyzing trace with hash -595256652, now seen corresponding path program 1 times [2023-08-03 20:27:09,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:09,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565717677] [2023-08-03 20:27:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:09,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:09,268 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 20:27:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565717677] [2023-08-03 20:27:09,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565717677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036492264] [2023-08-03 20:27:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:09,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:09,273 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 20:27:09,275 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 20:27:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:09,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:27:09,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:09,323 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 20:27:09,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:27:09,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036492264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:09,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:27:09,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:27:09,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771558813] [2023-08-03 20:27:09,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:09,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:27:09,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:27:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:09,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 227 [2023-08-03 20:27:09,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 20:27:09,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:09,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 227 [2023-08-03 20:27:09,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:09,749 INFO L124 PetriNetUnfolderBase]: 5997/8008 cut-off events. [2023-08-03 20:27:09,749 INFO L125 PetriNetUnfolderBase]: For 1419/1419 co-relation queries the response was YES. [2023-08-03 20:27:09,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17005 conditions, 8008 events. 5997/8008 cut-off events. For 1419/1419 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36446 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 20:27:09,776 INFO L140 encePairwiseOnDemand]: 224/227 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:27:09,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 309 flow [2023-08-03 20:27:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:27:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:27:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-03 20:27:09,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066079295154186 [2023-08-03 20:27:09,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-03 20:27:09,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-03 20:27:09,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:09,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-03 20:27:09,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 20:27:09,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:09,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:09,780 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 171 flow. Second operand 3 states and 345 transitions. [2023-08-03 20:27:09,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 309 flow [2023-08-03 20:27:09,783 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 20:27:09,784 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 176 flow [2023-08-03 20:27:09,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:09,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-03 20:27:09,784 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 176 flow [2023-08-03 20:27:09,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 20:27:09,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:09,785 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 20:27:09,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 20:27:09,989 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 20:27:09,989 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 20:27:09,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 780562551, now seen corresponding path program 1 times [2023-08-03 20:27:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266315974] [2023-08-03 20:27:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:10,022 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 20:27:10,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266315974] [2023-08-03 20:27:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266315974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464456147] [2023-08-03 20:27:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:10,024 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 20:27:10,026 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 20:27:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:10,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:27:10,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:10,098 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 20:27:10,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:10,113 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 20:27:10,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464456147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:10,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:10,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:27:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643605433] [2023-08-03 20:27:10,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:10,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 227 [2023-08-03 20:27:10,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 20:27:10,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:10,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 227 [2023-08-03 20:27:10,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:10,525 INFO L124 PetriNetUnfolderBase]: 5682/7585 cut-off events. [2023-08-03 20:27:10,525 INFO L125 PetriNetUnfolderBase]: For 1230/1230 co-relation queries the response was YES. [2023-08-03 20:27:10,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 7585 events. 5682/7585 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 34629 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 20:27:10,549 INFO L140 encePairwiseOnDemand]: 224/227 looper letters, 49 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 20:27:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 304 flow [2023-08-03 20:27:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:27:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:27:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 442 transitions. [2023-08-03 20:27:10,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486784140969163 [2023-08-03 20:27:10,550 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 442 transitions. [2023-08-03 20:27:10,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 442 transitions. [2023-08-03 20:27:10,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:10,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 442 transitions. [2023-08-03 20:27:10,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states 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 20:27:10,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:10,553 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:10,553 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 176 flow. Second operand 4 states and 442 transitions. [2023-08-03 20:27:10,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 304 flow [2023-08-03 20:27:10,568 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 20:27:10,568 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 172 flow [2023-08-03 20:27:10,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:10,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-03 20:27:10,569 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 172 flow [2023-08-03 20:27:10,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 20:27:10,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:10,569 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 20:27:10,579 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 20:27:10,776 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 20:27:10,777 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 20:27:10,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1385436246, now seen corresponding path program 1 times [2023-08-03 20:27:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058211062] [2023-08-03 20:27:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:10,809 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 20:27:10,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:10,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058211062] [2023-08-03 20:27:10,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058211062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:10,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079199899] [2023-08-03 20:27:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:10,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:10,811 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 20:27:10,812 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 20:27:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:10,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:27:10,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:10,875 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 20:27:10,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:10,885 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 20:27:10,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079199899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:10,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:10,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:27:10,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481364536] [2023-08-03 20:27:10,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:10,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:10,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:10,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:10,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 227 [2023-08-03 20:27:10,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 20:27:10,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:10,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 227 [2023-08-03 20:27:10,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:11,169 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-03 20:27:11,169 INFO L125 PetriNetUnfolderBase]: For 1235/1235 co-relation queries the response was YES. [2023-08-03 20:27:11,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11920 conditions, 5529 events. 4136/5529 cut-off events. For 1235/1235 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22863 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 20:27:11,182 INFO L140 encePairwiseOnDemand]: 223/227 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-03 20:27:11,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 342 flow [2023-08-03 20:27:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:27:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:27:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-08-03 20:27:11,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944933920704846 [2023-08-03 20:27:11,184 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-08-03 20:27:11,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-08-03 20:27:11,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:11,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-08-03 20:27:11,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:27:11,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:11,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:11,186 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 172 flow. Second operand 4 states and 449 transitions. [2023-08-03 20:27:11,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 342 flow [2023-08-03 20:27:11,190 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 20:27:11,191 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 186 flow [2023-08-03 20:27:11,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:11,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 20:27:11,191 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 186 flow [2023-08-03 20:27:11,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 20:27:11,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:11,192 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 20:27:11,199 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 20:27:11,395 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 20:27:11,396 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 20:27:11,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1558617288, now seen corresponding path program 1 times [2023-08-03 20:27:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:11,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705818862] [2023-08-03 20:27:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:11,438 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 20:27:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705818862] [2023-08-03 20:27:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705818862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837358392] [2023-08-03 20:27:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:11,440 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 20:27:11,442 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 20:27:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:11,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:27:11,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:11,514 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 20:27:11,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:11,524 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 20:27:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837358392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:11,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:11,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:27:11,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076689190] [2023-08-03 20:27:11,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:11,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:11,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 227 [2023-08-03 20:27:11,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 103.4) internal successors, (517), 5 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 20:27:11,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:11,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 227 [2023-08-03 20:27:11,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:11,783 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-03 20:27:11,783 INFO L125 PetriNetUnfolderBase]: For 2134/2134 co-relation queries the response was YES. [2023-08-03 20:27:11,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 5502 events. 4120/5502 cut-off events. For 2134/2134 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22696 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 20:27:11,800 INFO L140 encePairwiseOnDemand]: 223/227 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-03 20:27:11,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 358 flow [2023-08-03 20:27:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:27:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:27:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-08-03 20:27:11,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944933920704846 [2023-08-03 20:27:11,801 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-08-03 20:27:11,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-08-03 20:27:11,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:11,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-08-03 20:27:11,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:27:11,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:11,803 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:27:11,803 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 186 flow. Second operand 4 states and 449 transitions. [2023-08-03 20:27:11,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 358 flow [2023-08-03 20:27:11,811 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 20:27:11,812 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 190 flow [2023-08-03 20:27:11,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, 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 20:27:11,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 20:27:11,812 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 190 flow [2023-08-03 20:27:11,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.4) internal successors, (517), 5 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 20:27:11,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:11,813 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 20:27:11,817 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 20:27:12,014 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 20:27:12,014 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 20:27:12,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:12,015 INFO L85 PathProgramCache]: Analyzing trace with hash 577211490, now seen corresponding path program 1 times [2023-08-03 20:27:12,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:12,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379529708] [2023-08-03 20:27:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:12,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:27:12,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:12,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379529708] [2023-08-03 20:27:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379529708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:12,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:12,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 20:27:12,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154729447] [2023-08-03 20:27:12,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:27:12,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:27:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:27:12,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 227 [2023-08-03 20:27:12,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 20:27:12,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:12,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 227 [2023-08-03 20:27:12,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:12,373 INFO L124 PetriNetUnfolderBase]: 4362/5806 cut-off events. [2023-08-03 20:27:12,373 INFO L125 PetriNetUnfolderBase]: For 3141/3141 co-relation queries the response was YES. [2023-08-03 20:27:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13629 conditions, 5806 events. 4362/5806 cut-off events. For 3141/3141 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 24157 event pairs, 733 based on Foata normal form. 1/3745 useless extension candidates. Maximal degree in co-relation 13349. Up to 4855 conditions per place. [2023-08-03 20:27:12,392 INFO L140 encePairwiseOnDemand]: 221/227 looper letters, 65 selfloop transitions, 3 changer transitions 1/77 dead transitions. [2023-08-03 20:27:12,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 483 flow [2023-08-03 20:27:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:27:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:27:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-03 20:27:12,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433186490455213 [2023-08-03 20:27:12,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-03 20:27:12,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-03 20:27:12,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:12,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-03 20:27:12,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 20:27:12,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:12,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 20:27:12,395 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 190 flow. Second operand 3 states and 370 transitions. [2023-08-03 20:27:12,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 483 flow [2023-08-03 20:27:12,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 467 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 20:27:12,402 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 205 flow [2023-08-03 20:27:12,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-08-03 20:27:12,403 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 20:27:12,403 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 205 flow [2023-08-03 20:27:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 20:27:12,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:12,403 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 20:27:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 20:27:12,403 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 20:27:12,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1975266731, now seen corresponding path program 1 times [2023-08-03 20:27:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570780099] [2023-08-03 20:27:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:12,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570780099] [2023-08-03 20:27:12,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570780099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:12,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:12,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:12,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729545133] [2023-08-03 20:27:12,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:12,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:12,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:12,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:12,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 227 [2023-08-03 20:27:12,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 20:27:12,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:12,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 227 [2023-08-03 20:27:12,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:13,024 INFO L124 PetriNetUnfolderBase]: 6513/9319 cut-off events. [2023-08-03 20:27:13,024 INFO L125 PetriNetUnfolderBase]: For 5684/5684 co-relation queries the response was YES. [2023-08-03 20:27:13,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24579 conditions, 9319 events. 6513/9319 cut-off events. For 5684/5684 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 48550 event pairs, 2550 based on Foata normal form. 73/9392 useless extension candidates. Maximal degree in co-relation 24044. Up to 4579 conditions per place. [2023-08-03 20:27:13,047 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 101 selfloop transitions, 4 changer transitions 30/141 dead transitions. [2023-08-03 20:27:13,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 141 transitions, 920 flow [2023-08-03 20:27:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 593 transitions. [2023-08-03 20:27:13,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224669603524229 [2023-08-03 20:27:13,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 593 transitions. [2023-08-03 20:27:13,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 593 transitions. [2023-08-03 20:27:13,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:13,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 593 transitions. [2023-08-03 20:27:13,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 20:27:13,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:13,052 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:13,052 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 205 flow. Second operand 5 states and 593 transitions. [2023-08-03 20:27:13,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 141 transitions, 920 flow [2023-08-03 20:27:13,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 141 transitions, 915 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:27:13,072 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 229 flow [2023-08-03 20:27:13,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-08-03 20:27:13,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-03 20:27:13,073 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 229 flow [2023-08-03 20:27:13,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 20:27:13,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:13,073 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 20:27:13,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:27:13,073 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 20:27:13,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:13,074 INFO L85 PathProgramCache]: Analyzing trace with hash 242339277, now seen corresponding path program 1 times [2023-08-03 20:27:13,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:13,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501299529] [2023-08-03 20:27:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:13,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:13,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:13,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501299529] [2023-08-03 20:27:13,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501299529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:13,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623416226] [2023-08-03 20:27:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:13,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:13,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:13,159 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 20:27:13,176 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 20:27:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:13,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:13,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:13,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623416226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:13,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:27:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104190687] [2023-08-03 20:27:13,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:13,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:27:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:27:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:27:13,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:13,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 229 flow. Second operand has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 20:27:13,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:13,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:13,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:14,006 INFO L124 PetriNetUnfolderBase]: 8946/12206 cut-off events. [2023-08-03 20:27:14,006 INFO L125 PetriNetUnfolderBase]: For 12040/12040 co-relation queries the response was YES. [2023-08-03 20:27:14,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36042 conditions, 12206 events. 8946/12206 cut-off events. For 12040/12040 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 61184 event pairs, 2114 based on Foata normal form. 196/12401 useless extension candidates. Maximal degree in co-relation 35389. Up to 6105 conditions per place. [2023-08-03 20:27:14,056 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 127 selfloop transitions, 5 changer transitions 1/139 dead transitions. [2023-08-03 20:27:14,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 139 transitions, 941 flow [2023-08-03 20:27:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2023-08-03 20:27:14,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5118942731277533 [2023-08-03 20:27:14,058 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2023-08-03 20:27:14,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2023-08-03 20:27:14,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:14,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2023-08-03 20:27:14,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:27:14,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:14,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:14,060 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 229 flow. Second operand 5 states and 581 transitions. [2023-08-03 20:27:14,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 139 transitions, 941 flow [2023-08-03 20:27:14,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 139 transitions, 924 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-03 20:27:14,084 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 259 flow [2023-08-03 20:27:14,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2023-08-03 20:27:14,085 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2023-08-03 20:27:14,085 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 259 flow [2023-08-03 20:27:14,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 20:27:14,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:14,085 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 20:27:14,092 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 20:27:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 20:27:14,290 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 20:27:14,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -757169866, now seen corresponding path program 1 times [2023-08-03 20:27:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:14,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980952168] [2023-08-03 20:27:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:14,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:14,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980952168] [2023-08-03 20:27:14,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980952168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:14,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501449589] [2023-08-03 20:27:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:14,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:14,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:14,342 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 20:27:14,344 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 20:27:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:14,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:14,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:14,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:14,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501449589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:14,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:14,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:27:14,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748162493] [2023-08-03 20:27:14,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:14,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:27:14,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:27:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:27:14,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:14,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 259 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 20:27:14,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:14,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:14,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:15,272 INFO L124 PetriNetUnfolderBase]: 9524/13098 cut-off events. [2023-08-03 20:27:15,272 INFO L125 PetriNetUnfolderBase]: For 18130/18139 co-relation queries the response was YES. [2023-08-03 20:27:15,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40556 conditions, 13098 events. 9524/13098 cut-off events. For 18130/18139 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 67424 event pairs, 2880 based on Foata normal form. 205/13303 useless extension candidates. Maximal degree in co-relation 39868. Up to 6300 conditions per place. [2023-08-03 20:27:15,326 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 131 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2023-08-03 20:27:15,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 144 transitions, 999 flow [2023-08-03 20:27:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2023-08-03 20:27:15,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154185022026432 [2023-08-03 20:27:15,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2023-08-03 20:27:15,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2023-08-03 20:27:15,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:15,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2023-08-03 20:27:15,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 20:27:15,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:15,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:15,330 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 259 flow. Second operand 5 states and 585 transitions. [2023-08-03 20:27:15,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 144 transitions, 999 flow [2023-08-03 20:27:15,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 144 transitions, 996 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:27:15,368 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 299 flow [2023-08-03 20:27:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2023-08-03 20:27:15,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2023-08-03 20:27:15,368 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 299 flow [2023-08-03 20:27:15,369 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 20:27:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:15,369 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 20:27:15,373 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 20:27:15,573 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 20:27:15,573 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 20:27:15,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1790073622, now seen corresponding path program 2 times [2023-08-03 20:27:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113723278] [2023-08-03 20:27:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:27:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113723278] [2023-08-03 20:27:15,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113723278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:15,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:15,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63211463] [2023-08-03 20:27:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:15,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 227 [2023-08-03 20:27:15,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 299 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 20:27:15,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:15,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 227 [2023-08-03 20:27:15,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:16,520 INFO L124 PetriNetUnfolderBase]: 9636/13448 cut-off events. [2023-08-03 20:27:16,520 INFO L125 PetriNetUnfolderBase]: For 26265/26265 co-relation queries the response was YES. [2023-08-03 20:27:16,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44383 conditions, 13448 events. 9636/13448 cut-off events. For 26265/26265 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 72396 event pairs, 3213 based on Foata normal form. 73/13520 useless extension candidates. Maximal degree in co-relation 43584. Up to 7974 conditions per place. [2023-08-03 20:27:16,570 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 103 selfloop transitions, 6 changer transitions 28/143 dead transitions. [2023-08-03 20:27:16,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 143 transitions, 1036 flow [2023-08-03 20:27:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-08-03 20:27:16,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518942731277533 [2023-08-03 20:27:16,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-08-03 20:27:16,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-08-03 20:27:16,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:16,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-08-03 20:27:16,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 20:27:16,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:16,575 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:16,575 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 299 flow. Second operand 5 states and 589 transitions. [2023-08-03 20:27:16,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 143 transitions, 1036 flow [2023-08-03 20:27:16,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 143 transitions, 1019 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:27:16,639 INFO L231 Difference]: Finished difference. Result has 79 places, 55 transitions, 317 flow [2023-08-03 20:27:16,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=79, PETRI_TRANSITIONS=55} [2023-08-03 20:27:16,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2023-08-03 20:27:16,639 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 55 transitions, 317 flow [2023-08-03 20:27:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 20:27:16,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:16,640 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 20:27:16,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 20:27:16,640 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 20:27:16,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:16,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1194890479, now seen corresponding path program 2 times [2023-08-03 20:27:16,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159982604] [2023-08-03 20:27:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:27:16,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:16,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159982604] [2023-08-03 20:27:16,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159982604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:16,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:16,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322299698] [2023-08-03 20:27:16,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:16,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:16,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:27:16,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 55 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 20:27:16,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:16,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:27:16,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:17,861 INFO L124 PetriNetUnfolderBase]: 11696/16277 cut-off events. [2023-08-03 20:27:17,861 INFO L125 PetriNetUnfolderBase]: For 36215/36215 co-relation queries the response was YES. [2023-08-03 20:27:17,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56218 conditions, 16277 events. 11696/16277 cut-off events. For 36215/36215 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 89077 event pairs, 3974 based on Foata normal form. 196/16473 useless extension candidates. Maximal degree in co-relation 55208. Up to 8273 conditions per place. [2023-08-03 20:27:17,944 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 135 selfloop transitions, 9 changer transitions 1/151 dead transitions. [2023-08-03 20:27:17,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 151 transitions, 1123 flow [2023-08-03 20:27:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2023-08-03 20:27:17,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215859030837005 [2023-08-03 20:27:17,946 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 592 transitions. [2023-08-03 20:27:17,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 592 transitions. [2023-08-03 20:27:17,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:17,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 592 transitions. [2023-08-03 20:27:17,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 20:27:17,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:17,948 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:17,948 INFO L175 Difference]: Start difference. First operand has 79 places, 55 transitions, 317 flow. Second operand 5 states and 592 transitions. [2023-08-03 20:27:17,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 151 transitions, 1123 flow [2023-08-03 20:27:18,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 151 transitions, 1089 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-03 20:27:18,069 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 364 flow [2023-08-03 20:27:18,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-08-03 20:27:18,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2023-08-03 20:27:18,070 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 364 flow [2023-08-03 20:27:18,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 20:27:18,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:18,070 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 20:27:18,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 20:27:18,070 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 20:27:18,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -531529500, now seen corresponding path program 1 times [2023-08-03 20:27:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:18,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522130596] [2023-08-03 20:27:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:18,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:18,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522130596] [2023-08-03 20:27:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522130596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:18,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:18,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:18,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014766401] [2023-08-03 20:27:18,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:18,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:18,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:18,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:18,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 227 [2023-08-03 20:27:18,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 364 flow. Second operand has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 20:27:18,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:18,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 227 [2023-08-03 20:27:18,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:19,690 INFO L124 PetriNetUnfolderBase]: 18954/27240 cut-off events. [2023-08-03 20:27:19,690 INFO L125 PetriNetUnfolderBase]: For 68990/70593 co-relation queries the response was YES. [2023-08-03 20:27:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94689 conditions, 27240 events. 18954/27240 cut-off events. For 68990/70593 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 167243 event pairs, 5226 based on Foata normal form. 1919/29001 useless extension candidates. Maximal degree in co-relation 92597. Up to 12147 conditions per place. [2023-08-03 20:27:19,841 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 152 selfloop transitions, 4 changer transitions 2/166 dead transitions. [2023-08-03 20:27:19,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 166 transitions, 1362 flow [2023-08-03 20:27:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-08-03 20:27:19,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136563876651983 [2023-08-03 20:27:19,843 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-08-03 20:27:19,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-08-03 20:27:19,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:19,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-08-03 20:27:19,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 20:27:19,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:19,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:19,845 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 364 flow. Second operand 5 states and 583 transitions. [2023-08-03 20:27:19,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 166 transitions, 1362 flow [2023-08-03 20:27:20,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 166 transitions, 1333 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-03 20:27:20,083 INFO L231 Difference]: Finished difference. Result has 88 places, 62 transitions, 401 flow [2023-08-03 20:27:20,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=401, PETRI_PLACES=88, PETRI_TRANSITIONS=62} [2023-08-03 20:27:20,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2023-08-03 20:27:20,084 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 62 transitions, 401 flow [2023-08-03 20:27:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 20:27:20,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:20,084 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 20:27:20,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-03 20:27:20,084 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 20:27:20,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1240018838, now seen corresponding path program 1 times [2023-08-03 20:27:20,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:20,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246177357] [2023-08-03 20:27:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:20,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:27:20,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:20,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246177357] [2023-08-03 20:27:20,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246177357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:20,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169234946] [2023-08-03 20:27:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:20,125 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 20:27:20,127 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 20:27:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:20,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:20,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:27:20,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:27:20,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169234946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:20,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:20,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:27:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240288029] [2023-08-03 20:27:20,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:20,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:27:20,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:20,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:27:20,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:27:20,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:20,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 62 transitions, 401 flow. Second operand has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 20:27:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:20,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:20,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:22,044 INFO L124 PetriNetUnfolderBase]: 18918/27549 cut-off events. [2023-08-03 20:27:22,044 INFO L125 PetriNetUnfolderBase]: For 76684/78689 co-relation queries the response was YES. [2023-08-03 20:27:22,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100570 conditions, 27549 events. 18918/27549 cut-off events. For 76684/78689 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 175597 event pairs, 8472 based on Foata normal form. 2291/29804 useless extension candidates. Maximal degree in co-relation 98184. Up to 15978 conditions per place. [2023-08-03 20:27:22,219 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 140 selfloop transitions, 12 changer transitions 1/159 dead transitions. [2023-08-03 20:27:22,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1251 flow [2023-08-03 20:27:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2023-08-03 20:27:22,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154185022026432 [2023-08-03 20:27:22,221 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2023-08-03 20:27:22,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2023-08-03 20:27:22,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:22,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2023-08-03 20:27:22,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 20:27:22,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:22,223 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:22,223 INFO L175 Difference]: Start difference. First operand has 88 places, 62 transitions, 401 flow. Second operand 5 states and 585 transitions. [2023-08-03 20:27:22,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1251 flow [2023-08-03 20:27:22,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1239 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-03 20:27:22,460 INFO L231 Difference]: Finished difference. Result has 94 places, 67 transitions, 496 flow [2023-08-03 20:27:22,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=94, PETRI_TRANSITIONS=67} [2023-08-03 20:27:22,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2023-08-03 20:27:22,460 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 67 transitions, 496 flow [2023-08-03 20:27:22,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 20:27:22,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:22,461 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 20:27:22,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-03 20:27:22,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:22,661 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 20:27:22,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:22,662 INFO L85 PathProgramCache]: Analyzing trace with hash -966795012, now seen corresponding path program 3 times [2023-08-03 20:27:22,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666160917] [2023-08-03 20:27:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:22,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:27:22,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:22,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666160917] [2023-08-03 20:27:22,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666160917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:22,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:22,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:22,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282666241] [2023-08-03 20:27:22,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:22,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:22,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:22,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:22,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:27:22,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 67 transitions, 496 flow. Second operand has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 20:27:22,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:22,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:27:22,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:24,907 INFO L124 PetriNetUnfolderBase]: 17147/24762 cut-off events. [2023-08-03 20:27:24,908 INFO L125 PetriNetUnfolderBase]: For 79098/80931 co-relation queries the response was YES. [2023-08-03 20:27:24,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93483 conditions, 24762 events. 17147/24762 cut-off events. For 79098/80931 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 155176 event pairs, 6227 based on Foata normal form. 2016/26742 useless extension candidates. Maximal degree in co-relation 91454. Up to 14220 conditions per place. [2023-08-03 20:27:25,026 INFO L140 encePairwiseOnDemand]: 221/227 looper letters, 129 selfloop transitions, 13 changer transitions 34/182 dead transitions. [2023-08-03 20:27:25,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 182 transitions, 1476 flow [2023-08-03 20:27:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 20:27:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 20:27:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 702 transitions. [2023-08-03 20:27:25,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154185022026432 [2023-08-03 20:27:25,028 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 702 transitions. [2023-08-03 20:27:25,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 702 transitions. [2023-08-03 20:27:25,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:25,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 702 transitions. [2023-08-03 20:27:25,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 20:27:25,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 227.0) internal successors, (1589), 7 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 20:27:25,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 227.0) internal successors, (1589), 7 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 20:27:25,031 INFO L175 Difference]: Start difference. First operand has 94 places, 67 transitions, 496 flow. Second operand 6 states and 702 transitions. [2023-08-03 20:27:25,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 182 transitions, 1476 flow [2023-08-03 20:27:25,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 182 transitions, 1456 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-03 20:27:25,301 INFO L231 Difference]: Finished difference. Result has 99 places, 66 transitions, 494 flow [2023-08-03 20:27:25,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=99, PETRI_TRANSITIONS=66} [2023-08-03 20:27:25,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2023-08-03 20:27:25,302 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 66 transitions, 494 flow [2023-08-03 20:27:25,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 20:27:25,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:25,302 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 20:27:25,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-03 20:27:25,302 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 20:27:25,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1997162198, now seen corresponding path program 2 times [2023-08-03 20:27:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:25,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314949381] [2023-08-03 20:27:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:25,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:27:25,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:25,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314949381] [2023-08-03 20:27:25,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314949381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:25,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576266773] [2023-08-03 20:27:25,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:27:25,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:25,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:25,343 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 20:27:25,345 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 20:27:25,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:27:25,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:27:25,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:25,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:27:25,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:27:25,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576266773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:25,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:25,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:27:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477493468] [2023-08-03 20:27:25,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:25,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:27:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:27:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:27:25,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:25,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 66 transitions, 494 flow. Second operand has 10 states, 10 states have (on average 96.7) internal successors, (967), 10 states have internal predecessors, (967), 0 states have call successors, (0), 0 states 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 20:27:25,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:25,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:25,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:27,518 INFO L124 PetriNetUnfolderBase]: 15822/22277 cut-off events. [2023-08-03 20:27:27,519 INFO L125 PetriNetUnfolderBase]: For 81337/83059 co-relation queries the response was YES. [2023-08-03 20:27:27,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86244 conditions, 22277 events. 15822/22277 cut-off events. For 81337/83059 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 130579 event pairs, 5281 based on Foata normal form. 2000/24273 useless extension candidates. Maximal degree in co-relation 85515. Up to 9206 conditions per place. [2023-08-03 20:27:27,613 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 211 selfloop transitions, 17 changer transitions 1/235 dead transitions. [2023-08-03 20:27:27,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 235 transitions, 1840 flow [2023-08-03 20:27:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 20:27:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 20:27:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 931 transitions. [2023-08-03 20:27:27,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126651982378855 [2023-08-03 20:27:27,616 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 931 transitions. [2023-08-03 20:27:27,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 931 transitions. [2023-08-03 20:27:27,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:27,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 931 transitions. [2023-08-03 20:27:27,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.375) internal successors, (931), 8 states have internal predecessors, (931), 0 states have call successors, (0), 0 states 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 20:27:27,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:27:27,620 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:27:27,620 INFO L175 Difference]: Start difference. First operand has 99 places, 66 transitions, 494 flow. Second operand 8 states and 931 transitions. [2023-08-03 20:27:27,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 235 transitions, 1840 flow [2023-08-03 20:27:27,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 235 transitions, 1807 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-03 20:27:27,860 INFO L231 Difference]: Finished difference. Result has 103 places, 68 transitions, 523 flow [2023-08-03 20:27:27,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=523, PETRI_PLACES=103, PETRI_TRANSITIONS=68} [2023-08-03 20:27:27,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2023-08-03 20:27:27,861 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 68 transitions, 523 flow [2023-08-03 20:27:27,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.7) internal successors, (967), 10 states have internal predecessors, (967), 0 states have call successors, (0), 0 states 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 20:27:27,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:27,861 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 20:27:27,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-03 20:27:28,065 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,SelfDestructingSolverStorable21 [2023-08-03 20:27:28,065 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 20:27:28,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:28,066 INFO L85 PathProgramCache]: Analyzing trace with hash 691058325, now seen corresponding path program 3 times [2023-08-03 20:27:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:28,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864665216] [2023-08-03 20:27:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:27:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:28,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864665216] [2023-08-03 20:27:28,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864665216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:28,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:28,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770016550] [2023-08-03 20:27:28,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:28,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:27:28,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 68 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 20:27:28,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:28,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:27:28,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:29,747 INFO L124 PetriNetUnfolderBase]: 14101/20047 cut-off events. [2023-08-03 20:27:29,747 INFO L125 PetriNetUnfolderBase]: For 75312/76790 co-relation queries the response was YES. [2023-08-03 20:27:29,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80570 conditions, 20047 events. 14101/20047 cut-off events. For 75312/76790 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 117512 event pairs, 5602 based on Foata normal form. 1669/21681 useless extension candidates. Maximal degree in co-relation 79228. Up to 13360 conditions per place. [2023-08-03 20:27:29,832 INFO L140 encePairwiseOnDemand]: 221/227 looper letters, 93 selfloop transitions, 13 changer transitions 52/164 dead transitions. [2023-08-03 20:27:29,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 164 transitions, 1368 flow [2023-08-03 20:27:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 20:27:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 20:27:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 691 transitions. [2023-08-03 20:27:29,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073421439060205 [2023-08-03 20:27:29,834 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 691 transitions. [2023-08-03 20:27:29,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 691 transitions. [2023-08-03 20:27:29,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:29,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 691 transitions. [2023-08-03 20:27:29,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.16666666666667) internal successors, (691), 6 states have internal predecessors, (691), 0 states have call successors, (0), 0 states 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 20:27:29,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 227.0) internal successors, (1589), 7 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 20:27:29,837 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 227.0) internal successors, (1589), 7 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 20:27:29,837 INFO L175 Difference]: Start difference. First operand has 103 places, 68 transitions, 523 flow. Second operand 6 states and 691 transitions. [2023-08-03 20:27:29,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 164 transitions, 1368 flow [2023-08-03 20:27:30,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 164 transitions, 1336 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-03 20:27:30,100 INFO L231 Difference]: Finished difference. Result has 104 places, 67 transitions, 509 flow [2023-08-03 20:27:30,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=104, PETRI_TRANSITIONS=67} [2023-08-03 20:27:30,100 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2023-08-03 20:27:30,100 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 67 transitions, 509 flow [2023-08-03 20:27:30,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 20:27:30,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:30,101 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 20:27:30,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-03 20:27:30,101 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:30,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1613536965, now seen corresponding path program 4 times [2023-08-03 20:27:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:30,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342480946] [2023-08-03 20:27:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:30,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:27:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342480946] [2023-08-03 20:27:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342480946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:30,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:30,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:30,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491991915] [2023-08-03 20:27:30,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:30,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:30,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:30,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:27:30,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 67 transitions, 509 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 20:27:30,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:30,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:27:30,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:31,436 INFO L124 PetriNetUnfolderBase]: 11448/15863 cut-off events. [2023-08-03 20:27:31,437 INFO L125 PetriNetUnfolderBase]: For 59935/61132 co-relation queries the response was YES. [2023-08-03 20:27:31,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64190 conditions, 15863 events. 11448/15863 cut-off events. For 59935/61132 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 85076 event pairs, 3985 based on Foata normal form. 1573/17411 useless extension candidates. Maximal degree in co-relation 63463. Up to 9525 conditions per place. [2023-08-03 20:27:31,505 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 119 selfloop transitions, 13 changer transitions 2/140 dead transitions. [2023-08-03 20:27:31,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1158 flow [2023-08-03 20:27:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 574 transitions. [2023-08-03 20:27:31,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505726872246696 [2023-08-03 20:27:31,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 574 transitions. [2023-08-03 20:27:31,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 574 transitions. [2023-08-03 20:27:31,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:31,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 574 transitions. [2023-08-03 20:27:31,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 20:27:31,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:31,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:31,509 INFO L175 Difference]: Start difference. First operand has 104 places, 67 transitions, 509 flow. Second operand 5 states and 574 transitions. [2023-08-03 20:27:31,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1158 flow [2023-08-03 20:27:31,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 1106 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-03 20:27:31,763 INFO L231 Difference]: Finished difference. Result has 96 places, 65 transitions, 456 flow [2023-08-03 20:27:31,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=96, PETRI_TRANSITIONS=65} [2023-08-03 20:27:31,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2023-08-03 20:27:31,764 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 65 transitions, 456 flow [2023-08-03 20:27:31,764 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 20:27:31,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:31,764 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 20:27:31,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-03 20:27:31,764 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:31,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1439590749, now seen corresponding path program 1 times [2023-08-03 20:27:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:31,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67281566] [2023-08-03 20:27:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:27:31,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67281566] [2023-08-03 20:27:31,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67281566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073423679] [2023-08-03 20:27:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:31,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:31,807 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 20:27:31,809 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 20:27:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:31,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:31,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:27:31,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:27:31,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073423679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:31,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:31,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:27:31,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739924250] [2023-08-03 20:27:31,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:27:31,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:27:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:27:32,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:32,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 65 transitions, 456 flow. Second operand has 8 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 20:27:32,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:32,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:32,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:33,519 INFO L124 PetriNetUnfolderBase]: 13533/18260 cut-off events. [2023-08-03 20:27:33,520 INFO L125 PetriNetUnfolderBase]: For 54033/54913 co-relation queries the response was YES. [2023-08-03 20:27:33,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72720 conditions, 18260 events. 13533/18260 cut-off events. For 54033/54913 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 94037 event pairs, 2728 based on Foata normal form. 994/19194 useless extension candidates. Maximal degree in co-relation 72188. Up to 11017 conditions per place. [2023-08-03 20:27:33,597 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 138 selfloop transitions, 11 changer transitions 1/158 dead transitions. [2023-08-03 20:27:33,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 1251 flow [2023-08-03 20:27:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 578 transitions. [2023-08-03 20:27:33,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092511013215859 [2023-08-03 20:27:33,598 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 578 transitions. [2023-08-03 20:27:33,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 578 transitions. [2023-08-03 20:27:33,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:33,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 578 transitions. [2023-08-03 20:27:33,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:27:33,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:33,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:33,600 INFO L175 Difference]: Start difference. First operand has 96 places, 65 transitions, 456 flow. Second operand 5 states and 578 transitions. [2023-08-03 20:27:33,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 1251 flow [2023-08-03 20:27:33,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 158 transitions, 1194 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-03 20:27:33,771 INFO L231 Difference]: Finished difference. Result has 91 places, 67 transitions, 453 flow [2023-08-03 20:27:33,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=91, PETRI_TRANSITIONS=67} [2023-08-03 20:27:33,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2023-08-03 20:27:33,771 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 67 transitions, 453 flow [2023-08-03 20:27:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 20:27:33,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:33,772 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 20:27:33,776 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 20:27:33,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:33,972 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:33,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1211906489, now seen corresponding path program 1 times [2023-08-03 20:27:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953690633] [2023-08-03 20:27:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:27:34,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:34,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953690633] [2023-08-03 20:27:34,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953690633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:34,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:34,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609950968] [2023-08-03 20:27:34,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:34,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:34,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 227 [2023-08-03 20:27:34,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 67 transitions, 453 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 20:27:34,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:34,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 227 [2023-08-03 20:27:34,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:35,947 INFO L124 PetriNetUnfolderBase]: 18644/26015 cut-off events. [2023-08-03 20:27:35,947 INFO L125 PetriNetUnfolderBase]: For 100393/104735 co-relation queries the response was YES. [2023-08-03 20:27:36,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103346 conditions, 26015 events. 18644/26015 cut-off events. For 100393/104735 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 148646 event pairs, 5101 based on Foata normal form. 4738/30464 useless extension candidates. Maximal degree in co-relation 102082. Up to 14271 conditions per place. [2023-08-03 20:27:36,074 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 137 selfloop transitions, 3 changer transitions 26/175 dead transitions. [2023-08-03 20:27:36,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 175 transitions, 1563 flow [2023-08-03 20:27:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-03 20:27:36,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048458149779735 [2023-08-03 20:27:36,076 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-03 20:27:36,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-03 20:27:36,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:36,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-03 20:27:36,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:27:36,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:36,078 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:36,078 INFO L175 Difference]: Start difference. First operand has 91 places, 67 transitions, 453 flow. Second operand 5 states and 573 transitions. [2023-08-03 20:27:36,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 175 transitions, 1563 flow [2023-08-03 20:27:36,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 175 transitions, 1527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 20:27:36,234 INFO L231 Difference]: Finished difference. Result has 96 places, 69 transitions, 479 flow [2023-08-03 20:27:36,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=96, PETRI_TRANSITIONS=69} [2023-08-03 20:27:36,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2023-08-03 20:27:36,235 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 69 transitions, 479 flow [2023-08-03 20:27:36,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 20:27:36,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:36,235 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 20:27:36,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-03 20:27:36,235 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:36,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash -580810757, now seen corresponding path program 1 times [2023-08-03 20:27:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66525559] [2023-08-03 20:27:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:36,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:36,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66525559] [2023-08-03 20:27:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66525559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:36,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87954043] [2023-08-03 20:27:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:36,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:36,275 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 20:27:36,276 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 20:27:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:36,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:36,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:36,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:27:36,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87954043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:36,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:36,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:27:36,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983951686] [2023-08-03 20:27:36,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:36,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:27:36,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:36,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:27:36,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:27:36,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:36,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 69 transitions, 479 flow. Second operand has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 20:27:36,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:36,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:36,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:39,276 INFO L124 PetriNetUnfolderBase]: 24909/34649 cut-off events. [2023-08-03 20:27:39,277 INFO L125 PetriNetUnfolderBase]: For 122720/127079 co-relation queries the response was YES. [2023-08-03 20:27:39,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149829 conditions, 34649 events. 24909/34649 cut-off events. For 122720/127079 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 206473 event pairs, 5304 based on Foata normal form. 4645/39239 useless extension candidates. Maximal degree in co-relation 149304. Up to 15878 conditions per place. [2023-08-03 20:27:39,457 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 232 selfloop transitions, 23 changer transitions 2/265 dead transitions. [2023-08-03 20:27:39,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 265 transitions, 2157 flow [2023-08-03 20:27:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 20:27:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 20:27:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 926 transitions. [2023-08-03 20:27:39,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099118942731278 [2023-08-03 20:27:39,459 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 926 transitions. [2023-08-03 20:27:39,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 926 transitions. [2023-08-03 20:27:39,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:39,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 926 transitions. [2023-08-03 20:27:39,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.75) internal successors, (926), 8 states have internal predecessors, (926), 0 states have call successors, (0), 0 states 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 20:27:39,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:27:39,461 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:27:39,461 INFO L175 Difference]: Start difference. First operand has 96 places, 69 transitions, 479 flow. Second operand 8 states and 926 transitions. [2023-08-03 20:27:39,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 265 transitions, 2157 flow [2023-08-03 20:27:39,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 2111 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-03 20:27:39,829 INFO L231 Difference]: Finished difference. Result has 104 places, 81 transitions, 656 flow [2023-08-03 20:27:39,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=656, PETRI_PLACES=104, PETRI_TRANSITIONS=81} [2023-08-03 20:27:39,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2023-08-03 20:27:39,829 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 81 transitions, 656 flow [2023-08-03 20:27:39,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 20:27:39,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:39,830 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 20:27:39,836 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 20:27:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-03 20:27:40,034 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:40,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash 970155001, now seen corresponding path program 2 times [2023-08-03 20:27:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:40,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113172847] [2023-08-03 20:27:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:27:40,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:40,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113172847] [2023-08-03 20:27:40,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113172847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:40,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850225826] [2023-08-03 20:27:40,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:27:40,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:40,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:40,076 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 20:27:40,078 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 20:27:40,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:27:40,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:27:40,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:40,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:27:40,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:27:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850225826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:40,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:40,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:27:40,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996750160] [2023-08-03 20:27:40,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:27:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:27:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:27:40,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:40,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 81 transitions, 656 flow. Second operand has 10 states, 10 states have (on average 98.1) internal successors, (981), 10 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 20:27:40,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:40,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:40,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:43,505 INFO L124 PetriNetUnfolderBase]: 26166/36936 cut-off events. [2023-08-03 20:27:43,505 INFO L125 PetriNetUnfolderBase]: For 174055/178980 co-relation queries the response was YES. [2023-08-03 20:27:43,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164802 conditions, 36936 events. 26166/36936 cut-off events. For 174055/178980 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 230965 event pairs, 3847 based on Foata normal form. 5714/42622 useless extension candidates. Maximal degree in co-relation 162608. Up to 16075 conditions per place. [2023-08-03 20:27:43,738 INFO L140 encePairwiseOnDemand]: 221/227 looper letters, 297 selfloop transitions, 30 changer transitions 26/361 dead transitions. [2023-08-03 20:27:43,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 361 transitions, 3117 flow [2023-08-03 20:27:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 20:27:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 20:27:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1256 transitions. [2023-08-03 20:27:43,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030036043251902 [2023-08-03 20:27:43,740 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1256 transitions. [2023-08-03 20:27:43,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1256 transitions. [2023-08-03 20:27:43,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:43,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1256 transitions. [2023-08-03 20:27:43,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 114.18181818181819) internal successors, (1256), 11 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 20:27:43,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states 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 20:27:43,743 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states 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 20:27:43,743 INFO L175 Difference]: Start difference. First operand has 104 places, 81 transitions, 656 flow. Second operand 11 states and 1256 transitions. [2023-08-03 20:27:43,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 361 transitions, 3117 flow [2023-08-03 20:27:44,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 361 transitions, 3075 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-03 20:27:44,082 INFO L231 Difference]: Finished difference. Result has 116 places, 103 transitions, 977 flow [2023-08-03 20:27:44,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=977, PETRI_PLACES=116, PETRI_TRANSITIONS=103} [2023-08-03 20:27:44,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2023-08-03 20:27:44,082 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 103 transitions, 977 flow [2023-08-03 20:27:44,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.1) internal successors, (981), 10 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 20:27:44,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:44,082 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 20:27:44,088 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 20:27:44,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-03 20:27:44,285 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:44,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash 451349659, now seen corresponding path program 2 times [2023-08-03 20:27:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:44,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034205252] [2023-08-03 20:27:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:44,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:27:44,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034205252] [2023-08-03 20:27:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034205252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990897051] [2023-08-03 20:27:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:27:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:44,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:44,324 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 20:27:44,327 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 20:27:44,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:27:44,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:27:44,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:44,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:27:44,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:27:44,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990897051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:44,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:44,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:27:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549127646] [2023-08-03 20:27:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:44,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:27:44,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:27:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:27:44,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:44,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 103 transitions, 977 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 20:27:44,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:44,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:44,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:48,230 INFO L124 PetriNetUnfolderBase]: 30467/42732 cut-off events. [2023-08-03 20:27:48,230 INFO L125 PetriNetUnfolderBase]: For 217685/221534 co-relation queries the response was YES. [2023-08-03 20:27:48,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202562 conditions, 42732 events. 30467/42732 cut-off events. For 217685/221534 co-relation queries the response was YES. Maximal size of possible extension queue 1265. Compared 267060 event pairs, 5318 based on Foata normal form. 4173/46816 useless extension candidates. Maximal degree in co-relation 200103. Up to 21916 conditions per place. [2023-08-03 20:27:48,500 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 204 selfloop transitions, 25 changer transitions 0/240 dead transitions. [2023-08-03 20:27:48,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 240 transitions, 2494 flow [2023-08-03 20:27:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 574 transitions. [2023-08-03 20:27:48,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505726872246696 [2023-08-03 20:27:48,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 574 transitions. [2023-08-03 20:27:48,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 574 transitions. [2023-08-03 20:27:48,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:48,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 574 transitions. [2023-08-03 20:27:48,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 20:27:48,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:48,504 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:48,504 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 977 flow. Second operand 5 states and 574 transitions. [2023-08-03 20:27:48,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 240 transitions, 2494 flow [2023-08-03 20:27:50,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 240 transitions, 2392 flow, removed 51 selfloop flow, removed 1 redundant places. [2023-08-03 20:27:50,142 INFO L231 Difference]: Finished difference. Result has 120 places, 118 transitions, 1214 flow [2023-08-03 20:27:50,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1214, PETRI_PLACES=120, PETRI_TRANSITIONS=118} [2023-08-03 20:27:50,142 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2023-08-03 20:27:50,142 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 118 transitions, 1214 flow [2023-08-03 20:27:50,143 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 20:27:50,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:50,143 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 20:27:50,146 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 20:27:50,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-03 20:27:50,346 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:50,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2055855697, now seen corresponding path program 3 times [2023-08-03 20:27:50,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:50,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533558951] [2023-08-03 20:27:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:27:50,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533558951] [2023-08-03 20:27:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533558951] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:27:50,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:27:50,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:27:50,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468297626] [2023-08-03 20:27:50,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:27:50,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:27:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:27:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:27:50,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 227 [2023-08-03 20:27:50,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 118 transitions, 1214 flow. Second operand has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 20:27:50,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:50,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 227 [2023-08-03 20:27:50,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:27:54,237 INFO L124 PetriNetUnfolderBase]: 30526/43666 cut-off events. [2023-08-03 20:27:54,237 INFO L125 PetriNetUnfolderBase]: For 298331/302212 co-relation queries the response was YES. [2023-08-03 20:27:54,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209047 conditions, 43666 events. 30526/43666 cut-off events. For 298331/302212 co-relation queries the response was YES. Maximal size of possible extension queue 1339. Compared 278696 event pairs, 10112 based on Foata normal form. 4248/47801 useless extension candidates. Maximal degree in co-relation 206554. Up to 19535 conditions per place. [2023-08-03 20:27:54,538 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 148 selfloop transitions, 33 changer transitions 31/223 dead transitions. [2023-08-03 20:27:54,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 223 transitions, 2414 flow [2023-08-03 20:27:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:27:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:27:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-08-03 20:27:54,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101321585903084 [2023-08-03 20:27:54,539 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-08-03 20:27:54,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-08-03 20:27:54,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:27:54,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-08-03 20:27:54,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 20:27:54,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:54,541 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:27:54,541 INFO L175 Difference]: Start difference. First operand has 120 places, 118 transitions, 1214 flow. Second operand 5 states and 579 transitions. [2023-08-03 20:27:54,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 223 transitions, 2414 flow [2023-08-03 20:27:55,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 223 transitions, 2375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 20:27:55,348 INFO L231 Difference]: Finished difference. Result has 124 places, 118 transitions, 1286 flow [2023-08-03 20:27:55,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1286, PETRI_PLACES=124, PETRI_TRANSITIONS=118} [2023-08-03 20:27:55,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2023-08-03 20:27:55,349 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 118 transitions, 1286 flow [2023-08-03 20:27:55,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 20:27:55,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:27:55,349 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 20:27:55,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-03 20:27:55,349 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:27:55,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:27:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -689735799, now seen corresponding path program 4 times [2023-08-03 20:27:55,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:27:55,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421048652] [2023-08-03 20:27:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:27:55,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:27:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:27:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:27:55,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:27:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421048652] [2023-08-03 20:27:55,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421048652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:27:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116922996] [2023-08-03 20:27:55,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 20:27:55,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:27:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:27:55,386 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 20:27:55,389 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 20:27:55,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 20:27:55,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:27:55,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:27:55,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:27:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:27:55,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:27:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:27:55,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116922996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:27:55,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:27:55,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:27:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373367625] [2023-08-03 20:27:55,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:27:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:27:55,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:27:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:27:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:27:55,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:27:55,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 118 transitions, 1286 flow. Second operand has 8 states, 8 states have (on average 98.375) internal successors, (787), 8 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 20:27:55,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:27:55,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:27:55,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:00,235 INFO L124 PetriNetUnfolderBase]: 35971/50359 cut-off events. [2023-08-03 20:28:00,235 INFO L125 PetriNetUnfolderBase]: For 378734/385285 co-relation queries the response was YES. [2023-08-03 20:28:00,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252766 conditions, 50359 events. 35971/50359 cut-off events. For 378734/385285 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 309824 event pairs, 7909 based on Foata normal form. 4603/54189 useless extension candidates. Maximal degree in co-relation 250173. Up to 28389 conditions per place. [2023-08-03 20:28:00,773 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 234 selfloop transitions, 12 changer transitions 4/268 dead transitions. [2023-08-03 20:28:00,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 268 transitions, 3146 flow [2023-08-03 20:28:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:28:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:28:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 572 transitions. [2023-08-03 20:28:00,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039647577092511 [2023-08-03 20:28:00,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 572 transitions. [2023-08-03 20:28:00,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 572 transitions. [2023-08-03 20:28:00,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:00,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 572 transitions. [2023-08-03 20:28:00,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 20:28:00,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:00,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:00,777 INFO L175 Difference]: Start difference. First operand has 124 places, 118 transitions, 1286 flow. Second operand 5 states and 572 transitions. [2023-08-03 20:28:00,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 268 transitions, 3146 flow [2023-08-03 20:28:01,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 268 transitions, 2988 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-03 20:28:01,762 INFO L231 Difference]: Finished difference. Result has 126 places, 120 transitions, 1262 flow [2023-08-03 20:28:01,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1262, PETRI_PLACES=126, PETRI_TRANSITIONS=120} [2023-08-03 20:28:01,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2023-08-03 20:28:01,762 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 120 transitions, 1262 flow [2023-08-03 20:28:01,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.375) internal successors, (787), 8 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 20:28:01,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:01,763 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 20:28:01,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-03 20:28:01,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:28:01,967 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:01,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1604748235, now seen corresponding path program 1 times [2023-08-03 20:28:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830667870] [2023-08-03 20:28:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:01,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:28:02,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:02,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830667870] [2023-08-03 20:28:02,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830667870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:28:02,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:28:02,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:28:02,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141746403] [2023-08-03 20:28:02,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:28:02,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:28:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:28:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:28:02,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 227 [2023-08-03 20:28:02,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 120 transitions, 1262 flow. Second operand has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 20:28:02,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:02,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 227 [2023-08-03 20:28:02,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:06,795 INFO L124 PetriNetUnfolderBase]: 37238/52483 cut-off events. [2023-08-03 20:28:06,795 INFO L125 PetriNetUnfolderBase]: For 433649/442640 co-relation queries the response was YES. [2023-08-03 20:28:07,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266275 conditions, 52483 events. 37238/52483 cut-off events. For 433649/442640 co-relation queries the response was YES. Maximal size of possible extension queue 1473. Compared 331553 event pairs, 8289 based on Foata normal form. 5929/57910 useless extension candidates. Maximal degree in co-relation 263575. Up to 27567 conditions per place. [2023-08-03 20:28:07,200 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 252 selfloop transitions, 5 changer transitions 48/323 dead transitions. [2023-08-03 20:28:07,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 323 transitions, 4045 flow [2023-08-03 20:28:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:28:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:28:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-03 20:28:07,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048458149779735 [2023-08-03 20:28:07,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-03 20:28:07,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-03 20:28:07,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:07,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-03 20:28:07,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:28:07,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:07,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:07,204 INFO L175 Difference]: Start difference. First operand has 126 places, 120 transitions, 1262 flow. Second operand 5 states and 573 transitions. [2023-08-03 20:28:07,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 323 transitions, 4045 flow [2023-08-03 20:28:08,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 323 transitions, 4006 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 20:28:08,223 INFO L231 Difference]: Finished difference. Result has 130 places, 120 transitions, 1276 flow [2023-08-03 20:28:08,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1276, PETRI_PLACES=130, PETRI_TRANSITIONS=120} [2023-08-03 20:28:08,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2023-08-03 20:28:08,224 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 120 transitions, 1276 flow [2023-08-03 20:28:08,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 20:28:08,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:08,224 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 20:28:08,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-03 20:28:08,224 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:08,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash -585960145, now seen corresponding path program 5 times [2023-08-03 20:28:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536846574] [2023-08-03 20:28:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:08,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:28:08,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536846574] [2023-08-03 20:28:08,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536846574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:28:08,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:28:08,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:28:08,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107956482] [2023-08-03 20:28:08,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:28:08,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:28:08,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:08,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:28:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:28:08,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:28:08,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 120 transitions, 1276 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 20:28:08,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:08,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:28:08,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:12,190 INFO L124 PetriNetUnfolderBase]: 29681/41995 cut-off events. [2023-08-03 20:28:12,190 INFO L125 PetriNetUnfolderBase]: For 340299/345330 co-relation queries the response was YES. [2023-08-03 20:28:12,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220405 conditions, 41995 events. 29681/41995 cut-off events. For 340299/345330 co-relation queries the response was YES. Maximal size of possible extension queue 1209. Compared 257630 event pairs, 11807 based on Foata normal form. 5344/46557 useless extension candidates. Maximal degree in co-relation 218276. Up to 32791 conditions per place. [2023-08-03 20:28:12,690 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 135 selfloop transitions, 28 changer transitions 28/200 dead transitions. [2023-08-03 20:28:12,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 200 transitions, 2163 flow [2023-08-03 20:28:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:28:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:28:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-08-03 20:28:12,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022026431718062 [2023-08-03 20:28:12,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-08-03 20:28:12,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-08-03 20:28:12,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:12,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-08-03 20:28:12,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states 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 20:28:12,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:12,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:12,693 INFO L175 Difference]: Start difference. First operand has 130 places, 120 transitions, 1276 flow. Second operand 5 states and 570 transitions. [2023-08-03 20:28:12,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 200 transitions, 2163 flow [2023-08-03 20:28:13,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 200 transitions, 2125 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-03 20:28:13,619 INFO L231 Difference]: Finished difference. Result has 130 places, 119 transitions, 1297 flow [2023-08-03 20:28:13,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1297, PETRI_PLACES=130, PETRI_TRANSITIONS=119} [2023-08-03 20:28:13,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2023-08-03 20:28:13,620 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 119 transitions, 1297 flow [2023-08-03 20:28:13,620 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 20:28:13,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:13,620 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 20:28:13,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-03 20:28:13,620 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:13,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:13,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1523632573, now seen corresponding path program 6 times [2023-08-03 20:28:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147026904] [2023-08-03 20:28:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:28:13,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:13,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147026904] [2023-08-03 20:28:13,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147026904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:28:13,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515403738] [2023-08-03 20:28:13,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-03 20:28:13,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:28:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:28:13,669 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:28:13,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-03 20:28:13,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-03 20:28:13,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:28:13,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:28:13,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:28:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:28:13,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:28:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:28:13,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515403738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:28:13,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:28:13,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:28:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481834029] [2023-08-03 20:28:13,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:28:13,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:28:13,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:13,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:28:13,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:28:13,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:28:13,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 119 transitions, 1297 flow. Second operand has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 20:28:13,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:13,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:28:13,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:19,020 INFO L124 PetriNetUnfolderBase]: 39354/54835 cut-off events. [2023-08-03 20:28:19,021 INFO L125 PetriNetUnfolderBase]: For 393165/399055 co-relation queries the response was YES. [2023-08-03 20:28:19,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286381 conditions, 54835 events. 39354/54835 cut-off events. For 393165/399055 co-relation queries the response was YES. Maximal size of possible extension queue 1526. Compared 343040 event pairs, 6870 based on Foata normal form. 5819/59748 useless extension candidates. Maximal degree in co-relation 283674. Up to 25925 conditions per place. [2023-08-03 20:28:19,455 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 292 selfloop transitions, 67 changer transitions 4/375 dead transitions. [2023-08-03 20:28:19,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 375 transitions, 4095 flow [2023-08-03 20:28:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 20:28:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 20:28:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 922 transitions. [2023-08-03 20:28:19,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077092511013216 [2023-08-03 20:28:19,457 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 922 transitions. [2023-08-03 20:28:19,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 922 transitions. [2023-08-03 20:28:19,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:19,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 922 transitions. [2023-08-03 20:28:19,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.25) internal successors, (922), 8 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 20:28:19,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:28:19,459 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:28:19,459 INFO L175 Difference]: Start difference. First operand has 130 places, 119 transitions, 1297 flow. Second operand 8 states and 922 transitions. [2023-08-03 20:28:19,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 375 transitions, 4095 flow [2023-08-03 20:28:20,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 375 transitions, 3891 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-03 20:28:20,853 INFO L231 Difference]: Finished difference. Result has 135 places, 161 transitions, 1943 flow [2023-08-03 20:28:20,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1943, PETRI_PLACES=135, PETRI_TRANSITIONS=161} [2023-08-03 20:28:20,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2023-08-03 20:28:20,853 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 161 transitions, 1943 flow [2023-08-03 20:28:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 20:28:20,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:20,854 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 20:28:20,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-03 20:28:21,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:28:21,054 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:21,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1606424651, now seen corresponding path program 1 times [2023-08-03 20:28:21,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:21,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673711727] [2023-08-03 20:28:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:21,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:28:21,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673711727] [2023-08-03 20:28:21,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673711727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:28:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228867315] [2023-08-03 20:28:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:21,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:28:21,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:28:21,109 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:28:21,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-03 20:28:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:21,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:28:21,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:28:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:28:21,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:28:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:28:21,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228867315] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:28:21,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:28:21,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:28:21,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580830648] [2023-08-03 20:28:21,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:28:21,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:28:21,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:28:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:28:21,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:28:21,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 161 transitions, 1943 flow. Second operand has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 20:28:21,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:21,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:28:21,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:26,674 INFO L124 PetriNetUnfolderBase]: 39276/55127 cut-off events. [2023-08-03 20:28:26,674 INFO L125 PetriNetUnfolderBase]: For 467049/473636 co-relation queries the response was YES. [2023-08-03 20:28:26,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306940 conditions, 55127 events. 39276/55127 cut-off events. For 467049/473636 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 344695 event pairs, 12442 based on Foata normal form. 6517/60812 useless extension candidates. Maximal degree in co-relation 304036. Up to 26035 conditions per place. [2023-08-03 20:28:27,127 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 181 selfloop transitions, 90 changer transitions 0/283 dead transitions. [2023-08-03 20:28:27,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 283 transitions, 3513 flow [2023-08-03 20:28:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:28:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:28:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-08-03 20:28:27,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066079295154186 [2023-08-03 20:28:27,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-08-03 20:28:27,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-08-03 20:28:27,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:27,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-08-03 20:28:27,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 20:28:27,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:27,130 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:27,130 INFO L175 Difference]: Start difference. First operand has 135 places, 161 transitions, 1943 flow. Second operand 5 states and 575 transitions. [2023-08-03 20:28:27,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 283 transitions, 3513 flow [2023-08-03 20:28:28,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 283 transitions, 3402 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-03 20:28:28,600 INFO L231 Difference]: Finished difference. Result has 139 places, 187 transitions, 2534 flow [2023-08-03 20:28:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2534, PETRI_PLACES=139, PETRI_TRANSITIONS=187} [2023-08-03 20:28:28,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2023-08-03 20:28:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 187 transitions, 2534 flow [2023-08-03 20:28:28,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 20:28:28,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:28,601 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 20:28:28,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-03 20:28:28,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-03 20:28:28,803 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:28,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:28,803 INFO L85 PathProgramCache]: Analyzing trace with hash 166732771, now seen corresponding path program 2 times [2023-08-03 20:28:28,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:28,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751376958] [2023-08-03 20:28:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:28,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:28:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751376958] [2023-08-03 20:28:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751376958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:28:28,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:28:28,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:28:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451805653] [2023-08-03 20:28:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:28:28,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:28:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:28:28,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:28:28,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:28:28,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 187 transitions, 2534 flow. Second operand has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 20:28:28,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:28,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:28:28,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:33,823 INFO L124 PetriNetUnfolderBase]: 35995/49622 cut-off events. [2023-08-03 20:28:33,823 INFO L125 PetriNetUnfolderBase]: For 436735/442395 co-relation queries the response was YES. [2023-08-03 20:28:34,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293345 conditions, 49622 events. 35995/49622 cut-off events. For 436735/442395 co-relation queries the response was YES. Maximal size of possible extension queue 1349. Compared 299350 event pairs, 8586 based on Foata normal form. 5851/54709 useless extension candidates. Maximal degree in co-relation 291098. Up to 24666 conditions per place. [2023-08-03 20:28:34,451 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 162 selfloop transitions, 89 changer transitions 0/263 dead transitions. [2023-08-03 20:28:34,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 263 transitions, 3554 flow [2023-08-03 20:28:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:28:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:28:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-03 20:28:34,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4995594713656388 [2023-08-03 20:28:34,452 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-03 20:28:34,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-03 20:28:34,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:34,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-03 20:28:34,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 20:28:34,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:34,454 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:34,454 INFO L175 Difference]: Start difference. First operand has 139 places, 187 transitions, 2534 flow. Second operand 5 states and 567 transitions. [2023-08-03 20:28:34,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 263 transitions, 3554 flow [2023-08-03 20:28:37,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 263 transitions, 3308 flow, removed 72 selfloop flow, removed 4 redundant places. [2023-08-03 20:28:37,111 INFO L231 Difference]: Finished difference. Result has 136 places, 184 transitions, 2444 flow [2023-08-03 20:28:37,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2444, PETRI_PLACES=136, PETRI_TRANSITIONS=184} [2023-08-03 20:28:37,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2023-08-03 20:28:37,112 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 184 transitions, 2444 flow [2023-08-03 20:28:37,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 20:28:37,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:37,112 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 20:28:37,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-03 20:28:37,112 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:37,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1297805357, now seen corresponding path program 1 times [2023-08-03 20:28:37,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:37,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536377418] [2023-08-03 20:28:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:37,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:28:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:37,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536377418] [2023-08-03 20:28:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536377418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:28:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980926296] [2023-08-03 20:28:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:37,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:28:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:28:37,251 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:28:37,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-03 20:28:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:37,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:28:37,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:28:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:28:37,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:28:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:28:37,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980926296] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:28:37,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:28:37,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 20:28:37,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370889768] [2023-08-03 20:28:37,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:28:37,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:28:37,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:28:37,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:28:37,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:28:37,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 184 transitions, 2444 flow. Second operand has 8 states, 8 states have (on average 98.75) internal successors, (790), 8 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 20:28:37,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:37,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:28:37,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:43,388 INFO L124 PetriNetUnfolderBase]: 44658/61118 cut-off events. [2023-08-03 20:28:43,389 INFO L125 PetriNetUnfolderBase]: For 523428/529776 co-relation queries the response was YES. [2023-08-03 20:28:43,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350000 conditions, 61118 events. 44658/61118 cut-off events. For 523428/529776 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 369409 event pairs, 8562 based on Foata normal form. 4996/65814 useless extension candidates. Maximal degree in co-relation 349364. Up to 41176 conditions per place. [2023-08-03 20:28:43,921 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 300 selfloop transitions, 28 changer transitions 1/351 dead transitions. [2023-08-03 20:28:43,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 351 transitions, 4770 flow [2023-08-03 20:28:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:28:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:28:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2023-08-03 20:28:43,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.507488986784141 [2023-08-03 20:28:43,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2023-08-03 20:28:43,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2023-08-03 20:28:43,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:43,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2023-08-03 20:28:43,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 20:28:43,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:43,924 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:43,924 INFO L175 Difference]: Start difference. First operand has 136 places, 184 transitions, 2444 flow. Second operand 5 states and 576 transitions. [2023-08-03 20:28:43,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 351 transitions, 4770 flow [2023-08-03 20:28:45,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 351 transitions, 4480 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 20:28:45,992 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 2386 flow [2023-08-03 20:28:45,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2386, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2023-08-03 20:28:45,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2023-08-03 20:28:45,992 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 2386 flow [2023-08-03 20:28:45,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.75) internal successors, (790), 8 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 20:28:45,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:45,993 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 20:28:45,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-03 20:28:46,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-03 20:28:46,193 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:46,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash 614369019, now seen corresponding path program 2 times [2023-08-03 20:28:46,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:46,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590442535] [2023-08-03 20:28:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:46,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:28:46,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:46,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590442535] [2023-08-03 20:28:46,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590442535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:28:46,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107423895] [2023-08-03 20:28:46,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:28:46,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:28:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:28:46,231 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:28:46,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-03 20:28:46,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:28:46,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:28:46,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:28:46,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:28:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:28:46,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:28:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:28:46,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107423895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:28:46,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:28:46,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:28:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521913835] [2023-08-03 20:28:46,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:28:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:28:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:28:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:28:46,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:28:46,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 2386 flow. Second operand has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 20:28:46,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:46,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:28:46,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:28:54,299 INFO L124 PetriNetUnfolderBase]: 56152/77576 cut-off events. [2023-08-03 20:28:54,299 INFO L125 PetriNetUnfolderBase]: For 694627/702274 co-relation queries the response was YES. [2023-08-03 20:28:54,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442148 conditions, 77576 events. 56152/77576 cut-off events. For 694627/702274 co-relation queries the response was YES. Maximal size of possible extension queue 2066. Compared 488917 event pairs, 13220 based on Foata normal form. 5529/82916 useless extension candidates. Maximal degree in co-relation 439168. Up to 40111 conditions per place. [2023-08-03 20:28:55,017 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 429 selfloop transitions, 36 changer transitions 0/487 dead transitions. [2023-08-03 20:28:55,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 487 transitions, 7063 flow [2023-08-03 20:28:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:28:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:28:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-03 20:28:55,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013215859030837 [2023-08-03 20:28:55,018 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-03 20:28:55,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-03 20:28:55,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:28:55,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-03 20:28:55,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 20:28:55,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:55,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:28:55,020 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 2386 flow. Second operand 5 states and 569 transitions. [2023-08-03 20:28:55,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 487 transitions, 7063 flow [2023-08-03 20:28:57,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 487 transitions, 6985 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 20:28:57,844 INFO L231 Difference]: Finished difference. Result has 143 places, 216 transitions, 2962 flow [2023-08-03 20:28:57,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2962, PETRI_PLACES=143, PETRI_TRANSITIONS=216} [2023-08-03 20:28:57,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2023-08-03 20:28:57,845 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 216 transitions, 2962 flow [2023-08-03 20:28:57,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 20:28:57,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:28:57,845 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 20:28:57,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-03 20:28:58,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-03 20:28:58,049 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:28:58,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:28:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash 137012825, now seen corresponding path program 3 times [2023-08-03 20:28:58,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:28:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699414768] [2023-08-03 20:28:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:28:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:28:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:28:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:28:58,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:28:58,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699414768] [2023-08-03 20:28:58,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699414768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:28:58,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:28:58,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:28:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512004610] [2023-08-03 20:28:58,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:28:58,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:28:58,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:28:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:28:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:28:58,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:28:58,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 216 transitions, 2962 flow. Second operand has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:28:58,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:28:58,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:28:58,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:29:06,448 INFO L124 PetriNetUnfolderBase]: 56201/78077 cut-off events. [2023-08-03 20:29:06,448 INFO L125 PetriNetUnfolderBase]: For 765424/774456 co-relation queries the response was YES. [2023-08-03 20:29:06,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463415 conditions, 78077 events. 56201/78077 cut-off events. For 765424/774456 co-relation queries the response was YES. Maximal size of possible extension queue 2155. Compared 499696 event pairs, 18721 based on Foata normal form. 5898/83700 useless extension candidates. Maximal degree in co-relation 460348. Up to 63923 conditions per place. [2023-08-03 20:29:07,198 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 205 selfloop transitions, 70 changer transitions 32/329 dead transitions. [2023-08-03 20:29:07,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 329 transitions, 4722 flow [2023-08-03 20:29:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:29:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:29:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 566 transitions. [2023-08-03 20:29:07,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986784140969163 [2023-08-03 20:29:07,200 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 566 transitions. [2023-08-03 20:29:07,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 566 transitions. [2023-08-03 20:29:07,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:29:07,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 566 transitions. [2023-08-03 20:29:07,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 20:29:07,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:29:07,201 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:29:07,201 INFO L175 Difference]: Start difference. First operand has 143 places, 216 transitions, 2962 flow. Second operand 5 states and 566 transitions. [2023-08-03 20:29:07,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 329 transitions, 4722 flow [2023-08-03 20:29:10,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 329 transitions, 4702 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 20:29:10,589 INFO L231 Difference]: Finished difference. Result has 148 places, 238 transitions, 3544 flow [2023-08-03 20:29:10,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3544, PETRI_PLACES=148, PETRI_TRANSITIONS=238} [2023-08-03 20:29:10,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2023-08-03 20:29:10,590 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 238 transitions, 3544 flow [2023-08-03 20:29:10,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:29:10,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:29:10,590 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 20:29:10,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-03 20:29:10,590 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:29:10,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:29:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash -248819217, now seen corresponding path program 4 times [2023-08-03 20:29:10,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:29:10,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645413228] [2023-08-03 20:29:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:29:10,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:29:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:29:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:29:10,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:29:10,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645413228] [2023-08-03 20:29:10,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645413228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:29:10,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443719413] [2023-08-03 20:29:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 20:29:10,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:29:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:29:10,628 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:29:10,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-03 20:29:10,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 20:29:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:29:10,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:29:10,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:29:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:29:10,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:29:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:29:10,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443719413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:29:10,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:29:10,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:29:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010742139] [2023-08-03 20:29:10,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:29:10,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:29:10,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:29:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:29:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:29:10,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:29:10,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 238 transitions, 3544 flow. Second operand has 10 states, 10 states have (on average 97.7) internal successors, (977), 10 states have internal predecessors, (977), 0 states have call successors, (0), 0 states 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 20:29:10,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:29:10,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:29:10,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:29:18,794 INFO L124 PetriNetUnfolderBase]: 53291/73005 cut-off events. [2023-08-03 20:29:18,794 INFO L125 PetriNetUnfolderBase]: For 712555/719199 co-relation queries the response was YES. [2023-08-03 20:29:19,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441290 conditions, 73005 events. 53291/73005 cut-off events. For 712555/719199 co-relation queries the response was YES. Maximal size of possible extension queue 1919. Compared 451686 event pairs, 6751 based on Foata normal form. 5231/78045 useless extension candidates. Maximal degree in co-relation 440585. Up to 40581 conditions per place. [2023-08-03 20:29:19,511 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 511 selfloop transitions, 82 changer transitions 1/616 dead transitions. [2023-08-03 20:29:19,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 616 transitions, 8846 flow [2023-08-03 20:29:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 20:29:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 20:29:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2023-08-03 20:29:19,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005506607929515 [2023-08-03 20:29:19,513 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2023-08-03 20:29:19,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2023-08-03 20:29:19,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:29:19,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2023-08-03 20:29:19,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 states 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 20:29:19,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:29:19,515 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 20:29:19,515 INFO L175 Difference]: Start difference. First operand has 148 places, 238 transitions, 3544 flow. Second operand 8 states and 909 transitions. [2023-08-03 20:29:19,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 616 transitions, 8846 flow [2023-08-03 20:29:22,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 616 transitions, 8736 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-03 20:29:22,573 INFO L231 Difference]: Finished difference. Result has 155 places, 246 transitions, 3736 flow [2023-08-03 20:29:22,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3736, PETRI_PLACES=155, PETRI_TRANSITIONS=246} [2023-08-03 20:29:22,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2023-08-03 20:29:22,573 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 246 transitions, 3736 flow [2023-08-03 20:29:22,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.7) internal successors, (977), 10 states have internal predecessors, (977), 0 states have call successors, (0), 0 states 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 20:29:22,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:29:22,574 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 20:29:22,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-03 20:29:22,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:29:22,778 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:29:22,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:29:22,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1724772007, now seen corresponding path program 1 times [2023-08-03 20:29:22,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:29:22,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233607907] [2023-08-03 20:29:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:29:22,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:29:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:29:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:29:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:29:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233607907] [2023-08-03 20:29:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233607907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:29:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716798095] [2023-08-03 20:29:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:29:22,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:29:22,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:29:22,819 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:29:22,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-03 20:29:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:29:22,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:29:22,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:29:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:29:23,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:29:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:29:23,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716798095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:29:23,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:29:23,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:29:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575361721] [2023-08-03 20:29:23,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:29:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:29:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:29:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:29:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:29:23,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:29:23,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 246 transitions, 3736 flow. Second operand has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 20:29:23,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:29:23,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:29:23,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:29:33,512 INFO L124 PetriNetUnfolderBase]: 67080/92650 cut-off events. [2023-08-03 20:29:33,513 INFO L125 PetriNetUnfolderBase]: For 993849/1000650 co-relation queries the response was YES. [2023-08-03 20:29:34,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569623 conditions, 92650 events. 67080/92650 cut-off events. For 993849/1000650 co-relation queries the response was YES. Maximal size of possible extension queue 2438. Compared 595550 event pairs, 13394 based on Foata normal form. 4414/96804 useless extension candidates. Maximal degree in co-relation 566545. Up to 49803 conditions per place. [2023-08-03 20:29:34,440 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 449 selfloop transitions, 58 changer transitions 0/535 dead transitions. [2023-08-03 20:29:34,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 535 transitions, 8400 flow [2023-08-03 20:29:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:29:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:29:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-03 20:29:34,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013215859030837 [2023-08-03 20:29:34,442 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-03 20:29:34,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-03 20:29:34,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:29:34,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-03 20:29:34,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 20:29:34,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:29:34,443 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:29:34,443 INFO L175 Difference]: Start difference. First operand has 155 places, 246 transitions, 3736 flow. Second operand 5 states and 569 transitions. [2023-08-03 20:29:34,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 535 transitions, 8400 flow [2023-08-03 20:29:38,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 535 transitions, 8192 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-03 20:29:38,833 INFO L231 Difference]: Finished difference. Result has 157 places, 284 transitions, 4437 flow [2023-08-03 20:29:38,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4437, PETRI_PLACES=157, PETRI_TRANSITIONS=284} [2023-08-03 20:29:38,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2023-08-03 20:29:38,834 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 284 transitions, 4437 flow [2023-08-03 20:29:38,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 20:29:38,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:29:38,834 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 20:29:38,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-03 20:29:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:29:39,034 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:29:39,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:29:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 20953111, now seen corresponding path program 5 times [2023-08-03 20:29:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:29:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113638694] [2023-08-03 20:29:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:29:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:29:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:29:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:29:39,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:29:39,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113638694] [2023-08-03 20:29:39,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113638694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:29:39,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:29:39,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:29:39,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717210726] [2023-08-03 20:29:39,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:29:39,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:29:39,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:29:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:29:39,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:29:39,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-08-03 20:29:39,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 284 transitions, 4437 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 20:29:39,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:29:39,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-08-03 20:29:39,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:29:50,049 INFO L124 PetriNetUnfolderBase]: 66645/92470 cut-off events. [2023-08-03 20:29:50,049 INFO L125 PetriNetUnfolderBase]: For 1089397/1097768 co-relation queries the response was YES. [2023-08-03 20:29:50,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583127 conditions, 92470 events. 66645/92470 cut-off events. For 1089397/1097768 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 601772 event pairs, 18708 based on Foata normal form. 5829/97819 useless extension candidates. Maximal degree in co-relation 580020. Up to 71233 conditions per place. [2023-08-03 20:29:51,012 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 276 selfloop transitions, 82 changer transitions 36/422 dead transitions. [2023-08-03 20:29:51,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 422 transitions, 6813 flow [2023-08-03 20:29:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:29:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:29:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-08-03 20:29:51,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691629955947136 [2023-08-03 20:29:51,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-08-03 20:29:51,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-08-03 20:29:51,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:29:51,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-08-03 20:29:51,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 20:29:51,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:29:51,015 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:29:51,015 INFO L175 Difference]: Start difference. First operand has 157 places, 284 transitions, 4437 flow. Second operand 5 states and 564 transitions. [2023-08-03 20:29:51,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 422 transitions, 6813 flow [2023-08-03 20:29:55,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 422 transitions, 6761 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-03 20:29:55,430 INFO L231 Difference]: Finished difference. Result has 162 places, 312 transitions, 5176 flow [2023-08-03 20:29:55,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5176, PETRI_PLACES=162, PETRI_TRANSITIONS=312} [2023-08-03 20:29:55,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2023-08-03 20:29:55,431 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 312 transitions, 5176 flow [2023-08-03 20:29:55,431 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 20:29:55,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:29:55,431 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 20:29:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-03 20:29:55,431 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:29:55,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:29:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1664455669, now seen corresponding path program 6 times [2023-08-03 20:29:55,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:29:55,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096130990] [2023-08-03 20:29:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:29:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:29:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:29:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:29:55,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:29:55,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096130990] [2023-08-03 20:29:55,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096130990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:29:55,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703068161] [2023-08-03 20:29:55,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-03 20:29:55,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:29:55,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:29:55,466 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:29:55,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-03 20:29:55,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-03 20:29:55,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:29:55,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:29:55,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:29:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:29:55,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:29:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:29:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703068161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:29:55,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:29:55,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-03 20:29:55,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230584136] [2023-08-03 20:29:55,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:29:55,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:29:55,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:29:55,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:29:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:29:55,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 227 [2023-08-03 20:29:55,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 312 transitions, 5176 flow. Second operand has 10 states, 10 states have (on average 94.9) internal successors, (949), 10 states have internal predecessors, (949), 0 states have call successors, (0), 0 states 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 20:29:55,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:29:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 227 [2023-08-03 20:29:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:30:07,304 INFO L124 PetriNetUnfolderBase]: 66471/91045 cut-off events. [2023-08-03 20:30:07,304 INFO L125 PetriNetUnfolderBase]: For 1037826/1041121 co-relation queries the response was YES. [2023-08-03 20:30:07,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579031 conditions, 91045 events. 66471/91045 cut-off events. For 1037826/1041121 co-relation queries the response was YES. Maximal size of possible extension queue 2334. Compared 573785 event pairs, 4858 based on Foata normal form. 3349/94387 useless extension candidates. Maximal degree in co-relation 576151. Up to 48934 conditions per place. [2023-08-03 20:30:08,285 INFO L140 encePairwiseOnDemand]: 219/227 looper letters, 772 selfloop transitions, 282 changer transitions 20/1090 dead transitions. [2023-08-03 20:30:08,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1090 transitions, 16169 flow [2023-08-03 20:30:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-03 20:30:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-03 20:30:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2645 transitions. [2023-08-03 20:30:08,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466079295154185 [2023-08-03 20:30:08,288 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2645 transitions. [2023-08-03 20:30:08,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2645 transitions. [2023-08-03 20:30:08,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:30:08,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2645 transitions. [2023-08-03 20:30:08,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 105.8) internal successors, (2645), 25 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states 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 20:30:08,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 227.0) internal successors, (5902), 26 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states 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 20:30:08,294 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 227.0) internal successors, (5902), 26 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states 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 20:30:08,294 INFO L175 Difference]: Start difference. First operand has 162 places, 312 transitions, 5176 flow. Second operand 25 states and 2645 transitions. [2023-08-03 20:30:08,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1090 transitions, 16169 flow [2023-08-03 20:30:15,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1090 transitions, 15868 flow, removed 68 selfloop flow, removed 1 redundant places. [2023-08-03 20:30:15,871 INFO L231 Difference]: Finished difference. Result has 189 places, 471 transitions, 8475 flow [2023-08-03 20:30:15,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=5037, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8475, PETRI_PLACES=189, PETRI_TRANSITIONS=471} [2023-08-03 20:30:15,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2023-08-03 20:30:15,872 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 471 transitions, 8475 flow [2023-08-03 20:30:15,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 94.9) internal successors, (949), 10 states have internal predecessors, (949), 0 states have call successors, (0), 0 states 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 20:30:15,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:30:15,872 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 20:30:15,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-03 20:30:16,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-03 20:30:16,072 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:30:16,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:30:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1345870493, now seen corresponding path program 1 times [2023-08-03 20:30:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:30:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694681300] [2023-08-03 20:30:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:30:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:30:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:30:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:30:16,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:30:16,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694681300] [2023-08-03 20:30:16,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694681300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:30:16,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562216639] [2023-08-03 20:30:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:30:16,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:30:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:30:16,138 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:30:16,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-03 20:30:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:30:16,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 20:30:16,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:30:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:30:16,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:30:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:30:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562216639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:30:16,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:30:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-08-03 20:30:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110794066] [2023-08-03 20:30:16,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:30:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:30:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:30:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:30:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:30:16,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 227 [2023-08-03 20:30:16,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 471 transitions, 8475 flow. Second operand has 5 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 20:30:16,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:30:16,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 227 [2023-08-03 20:30:16,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:30:40,299 INFO L124 PetriNetUnfolderBase]: 114233/163161 cut-off events. [2023-08-03 20:30:40,300 INFO L125 PetriNetUnfolderBase]: For 2327705/2378146 co-relation queries the response was YES. [2023-08-03 20:30:41,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036192 conditions, 163161 events. 114233/163161 cut-off events. For 2327705/2378146 co-relation queries the response was YES. Maximal size of possible extension queue 4654. Compared 1218447 event pairs, 16645 based on Foata normal form. 27385/188484 useless extension candidates. Maximal degree in co-relation 1035168. Up to 91487 conditions per place. [2023-08-03 20:30:42,567 INFO L140 encePairwiseOnDemand]: 221/227 looper letters, 437 selfloop transitions, 401 changer transitions 1/907 dead transitions. [2023-08-03 20:30:42,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 907 transitions, 17319 flow [2023-08-03 20:30:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:30:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:30:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2023-08-03 20:30:42,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539647577092511 [2023-08-03 20:30:42,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2023-08-03 20:30:42,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2023-08-03 20:30:42,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:30:42,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2023-08-03 20:30:42,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 20:30:42,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:30:42,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 20:30:42,570 INFO L175 Difference]: Start difference. First operand has 189 places, 471 transitions, 8475 flow. Second operand 4 states and 503 transitions. [2023-08-03 20:30:42,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 907 transitions, 17319 flow [2023-08-03 20:31:21,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 907 transitions, 15360 flow, removed 232 selfloop flow, removed 15 redundant places. [2023-08-03 20:31:21,555 INFO L231 Difference]: Finished difference. Result has 175 places, 808 transitions, 15300 flow [2023-08-03 20:31:21,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=7373, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=15300, PETRI_PLACES=175, PETRI_TRANSITIONS=808} [2023-08-03 20:31:21,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2023-08-03 20:31:21,556 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 808 transitions, 15300 flow [2023-08-03 20:31:21,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 20:31:21,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:31:21,556 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 20:31:21,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-03 20:31:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-03 20:31:21,756 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:31:21,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:31:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash 489309317, now seen corresponding path program 2 times [2023-08-03 20:31:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:31:21,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542415790] [2023-08-03 20:31:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:31:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:31:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:31:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:31:21,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:31:21,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542415790] [2023-08-03 20:31:21,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542415790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:31:21,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270189981] [2023-08-03 20:31:21,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:31:21,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:31:21,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:31:21,864 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:31:21,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-03 20:31:21,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:31:21,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:31:21,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 20:31:21,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:31:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:31:22,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:31:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:31:22,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270189981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:31:22,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:31:22,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 20:31:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420209173] [2023-08-03 20:31:22,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:31:22,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:31:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:31:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:31:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:31:22,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 227 [2023-08-03 20:31:22,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 808 transitions, 15300 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 20:31:22,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:31:22,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 227 [2023-08-03 20:31:22,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:32:14,196 INFO L124 PetriNetUnfolderBase]: 211695/303615 cut-off events. [2023-08-03 20:32:14,196 INFO L125 PetriNetUnfolderBase]: For 4502492/4579137 co-relation queries the response was YES. [2023-08-03 20:32:16,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044157 conditions, 303615 events. 211695/303615 cut-off events. For 4502492/4579137 co-relation queries the response was YES. Maximal size of possible extension queue 8846. Compared 2460622 event pairs, 28313 based on Foata normal form. 39767/340138 useless extension candidates. Maximal degree in co-relation 2042628. Up to 152501 conditions per place. [2023-08-03 20:32:18,031 INFO L140 encePairwiseOnDemand]: 221/227 looper letters, 497 selfloop transitions, 966 changer transitions 1/1532 dead transitions. [2023-08-03 20:32:18,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1532 transitions, 30116 flow [2023-08-03 20:32:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:32:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:32:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 636 transitions. [2023-08-03 20:32:18,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560352422907489 [2023-08-03 20:32:18,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 636 transitions. [2023-08-03 20:32:18,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 636 transitions. [2023-08-03 20:32:18,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:32:18,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 636 transitions. [2023-08-03 20:32:18,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 20:32:18,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:32:18,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 20:32:18,034 INFO L175 Difference]: Start difference. First operand has 175 places, 808 transitions, 15300 flow. Second operand 5 states and 636 transitions. [2023-08-03 20:32:18,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 1532 transitions, 30116 flow [2023-08-03 20:34:54,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 1532 transitions, 30116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:34:54,530 INFO L231 Difference]: Finished difference. Result has 181 places, 1373 transitions, 29555 flow [2023-08-03 20:34:54,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=15300, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=29555, PETRI_PLACES=181, PETRI_TRANSITIONS=1373} [2023-08-03 20:34:54,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2023-08-03 20:34:54,531 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 1373 transitions, 29555 flow [2023-08-03 20:34:54,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 20:34:54,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:34:54,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 20:34:54,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-03 20:34:54,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:34:54,735 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:34:54,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:34:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1785763491, now seen corresponding path program 1 times [2023-08-03 20:34:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:34:54,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748897860] [2023-08-03 20:34:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:34:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:34:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:34:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 20:34:54,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:34:54,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748897860] [2023-08-03 20:34:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748897860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:34:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737663823] [2023-08-03 20:34:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:34:54,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:34:54,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:34:54,799 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:34:54,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-03 20:34:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:34:54,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 20:34:54,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:34:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 20:34:54,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:34:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 20:34:54,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737663823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:34:54,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:34:54,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-03 20:34:54,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498766547] [2023-08-03 20:34:54,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:34:54,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 20:34:54,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:34:54,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 20:34:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-03 20:34:55,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-03 20:34:55,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 1373 transitions, 29555 flow. Second operand has 12 states, 12 states have (on average 97.91666666666667) internal successors, (1175), 12 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states 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 20:34:55,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:34:55,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-03 20:34:55,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:36:51,386 INFO L124 PetriNetUnfolderBase]: 361467/522471 cut-off events. [2023-08-03 20:36:51,386 INFO L125 PetriNetUnfolderBase]: For 8847165/8884139 co-relation queries the response was YES. [2023-08-03 20:36:55,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3657085 conditions, 522471 events. 361467/522471 cut-off events. For 8847165/8884139 co-relation queries the response was YES. Maximal size of possible extension queue 14372. Compared 4530569 event pairs, 31955 based on Foata normal form. 32237/553450 useless extension candidates. Maximal degree in co-relation 3655252. Up to 237029 conditions per place. [2023-08-03 20:36:58,920 INFO L140 encePairwiseOnDemand]: 221/227 looper letters, 3964 selfloop transitions, 551 changer transitions 0/4555 dead transitions. [2023-08-03 20:36:58,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 4555 transitions, 97408 flow [2023-08-03 20:36:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-03 20:36:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-03 20:36:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2281 transitions. [2023-08-03 20:36:58,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024229074889868 [2023-08-03 20:36:58,928 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2281 transitions. [2023-08-03 20:36:58,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2281 transitions. [2023-08-03 20:36:58,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:36:58,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2281 transitions. [2023-08-03 20:36:58,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 114.05) internal successors, (2281), 20 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states 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 20:36:58,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 227.0) internal successors, (4767), 21 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states 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 20:36:58,937 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 227.0) internal successors, (4767), 21 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states 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 20:36:58,937 INFO L175 Difference]: Start difference. First operand has 181 places, 1373 transitions, 29555 flow. Second operand 20 states and 2281 transitions. [2023-08-03 20:36:58,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 4555 transitions, 97408 flow Received shutdown request... [2023-08-03 20:39:00,441 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 20:39:00,441 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 20:39:01,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-03 20:39:01,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown