/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-more-min-array.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:40:22,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:40:22,764 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:40:22,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:40:22,770 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:40:22,770 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:40:22,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:40:22,799 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:40:22,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:40:22,803 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:40:22,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:40:22,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:40:22,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:40:22,806 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:40:22,806 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:40:22,806 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:40:22,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:40:22,807 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:40:22,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:40:22,807 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:40:22,807 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:40:22,808 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:40:22,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:40:22,808 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:40:22,808 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:40:22,809 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:40:22,810 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:40:22,810 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:40:22,810 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:40:22,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:40:22,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:40:22,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:40:22,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:40:22,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:40:22,812 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:40:22,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:40:22,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:40:22,812 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:40:22,812 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:40:22,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:40:22,813 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:40:22,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:40:23,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:40:23,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:40:23,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:40:23,041 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:40:23,041 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:40:23,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array.wvr_bound2.c [2023-08-03 20:40:24,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:40:24,397 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:40:24,398 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array.wvr_bound2.c [2023-08-03 20:40:24,406 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e7286eeb/76af0db0e8614035b69fc05450e136d3/FLAG326ba56f4 [2023-08-03 20:40:24,424 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e7286eeb/76af0db0e8614035b69fc05450e136d3 [2023-08-03 20:40:24,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:40:24,431 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:40:24,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:40:24,434 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:40:24,437 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:40:24,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201a86dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24, skipping insertion in model container [2023-08-03 20:40:24,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,464 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:40:24,604 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-more-min-array.wvr_bound2.c[2796,2809] [2023-08-03 20:40:24,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:40:24,616 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:40:24,640 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-more-min-array.wvr_bound2.c[2796,2809] [2023-08-03 20:40:24,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:40:24,650 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:40:24,650 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:40:24,656 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:40:24,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24 WrapperNode [2023-08-03 20:40:24,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:40:24,658 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:40:24,658 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:40:24,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:40:24,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,691 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 152 [2023-08-03 20:40:24,691 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:40:24,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:40:24,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:40:24,692 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:40:24,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,715 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,720 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,721 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,723 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:40:24,726 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:40:24,726 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:40:24,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:40:24,727 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (1/1) ... [2023-08-03 20:40:24,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:40:24,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:40:24,758 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 20:40:24,780 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 20:40:24,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:40:24,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:40:24,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:40:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:40:24,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:40:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 20:40:24,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 20:40:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:40:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:40:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:40:24,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:40:24,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:40:24,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:40:24,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:40:24,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:40:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:40:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:40:24,798 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 20:40:24,920 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:40:24,922 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:40:25,158 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:40:25,250 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:40:25,250 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-03 20:40:25,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:40:25 BoogieIcfgContainer [2023-08-03 20:40:25,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:40:25,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:40:25,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:40:25,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:40:25,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:40:24" (1/3) ... [2023-08-03 20:40:25,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5dbdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:40:25, skipping insertion in model container [2023-08-03 20:40:25,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:40:24" (2/3) ... [2023-08-03 20:40:25,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5dbdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:40:25, skipping insertion in model container [2023-08-03 20:40:25,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:40:25" (3/3) ... [2023-08-03 20:40:25,263 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-min-array.wvr_bound2.c [2023-08-03 20:40:25,269 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:40:25,278 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:40:25,278 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:40:25,278 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:40:25,383 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 20:40:25,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-03 20:40:25,595 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-03 20:40:25,595 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:40:25,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3241 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2023-08-03 20:40:25,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 192 transitions, 426 flow [2023-08-03 20:40:25,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 192 transitions, 426 flow [2023-08-03 20:40:25,619 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:40:25,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-03 20:40:25,636 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-03 20:40:25,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-03 20:40:25,705 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-03 20:40:25,705 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:40:25,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3241 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2023-08-03 20:40:25,716 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-03 20:40:30,117 INFO L134 LiptonReduction]: Checked pairs total: 9109 [2023-08-03 20:40:30,117 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-03 20:40:30,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:40:30,143 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;@49f82213, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:40:30,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:40:30,149 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:40:30,149 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-03 20:40:30,149 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:40:30,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:40:30,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:40:30,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:40:30,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:40:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash -281942865, now seen corresponding path program 1 times [2023-08-03 20:40:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:40:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984127352] [2023-08-03 20:40:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:40:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:30,506 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 20:40:30,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:40:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984127352] [2023-08-03 20:40:30,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984127352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:40:30,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:40:30,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:40:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561351323] [2023-08-03 20:40:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:40:30,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:40:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:40:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:40:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:40:30,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 362 [2023-08-03 20:40:30,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:30,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:40:30,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 362 [2023-08-03 20:40:30,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:40:30,926 INFO L124 PetriNetUnfolderBase]: 2293/3230 cut-off events. [2023-08-03 20:40:30,927 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-03 20:40:30,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6524 conditions, 3230 events. 2293/3230 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14905 event pairs, 1048 based on Foata normal form. 0/1846 useless extension candidates. Maximal degree in co-relation 4977. Up to 3069 conditions per place. [2023-08-03 20:40:30,950 INFO L140 encePairwiseOnDemand]: 358/362 looper letters, 38 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-03 20:40:30,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 220 flow [2023-08-03 20:40:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:40:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:40:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-03 20:40:30,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723756906077348 [2023-08-03 20:40:30,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-03 20:40:30,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-03 20:40:30,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:40:30,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-03 20:40:30,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:30,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:30,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:30,980 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 513 transitions. [2023-08-03 20:40:30,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 220 flow [2023-08-03 20:40:30,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:40:30,986 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 150 flow [2023-08-03 20:40:30,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-03 20:40:30,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-03 20:40:30,991 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 150 flow [2023-08-03 20:40:30,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:30,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:40:30,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 20:40:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:40:30,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:40:30,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:40:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2015478006, now seen corresponding path program 1 times [2023-08-03 20:40:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:40:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949417043] [2023-08-03 20:40:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:40:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:40:31,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:40:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:40:31,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:40:31,129 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:40:31,130 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 20:40:31,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 20:40:31,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 20:40:31,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 20:40:31,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:40:31,132 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:40:31,134 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:40:31,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:40:31,162 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 20:40:31,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-03 20:40:31,700 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-03 20:40:31,701 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:40:31,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33195 event pairs, 11 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-03 20:40:31,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 558 flow [2023-08-03 20:40:31,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 558 flow [2023-08-03 20:40:31,745 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:40:31,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-03 20:40:31,746 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-03 20:40:31,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-03 20:40:32,229 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-03 20:40:32,229 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:40:32,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33195 event pairs, 11 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-03 20:40:32,338 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-03 20:40:37,653 INFO L134 LiptonReduction]: Checked pairs total: 27035 [2023-08-03 20:40:37,653 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-03 20:40:37,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:40:37,656 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;@49f82213, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:40:37,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:40:37,659 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:40:37,659 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-03 20:40:37,660 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 20:40:37,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:40:37,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:40:37,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:40:37,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:40:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2005627499, now seen corresponding path program 1 times [2023-08-03 20:40:37,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:40:37,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42834403] [2023-08-03 20:40:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:37,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:40:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:37,694 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 20:40:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:40:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42834403] [2023-08-03 20:40:37,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42834403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:40:37,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:40:37,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:40:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338625773] [2023-08-03 20:40:37,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:40:37,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:40:37,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:40:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:40:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:40:37,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-03 20:40:37,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:37,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:40:37,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-03 20:40:37,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:40:59,176 INFO L124 PetriNetUnfolderBase]: 282559/337065 cut-off events. [2023-08-03 20:40:59,177 INFO L125 PetriNetUnfolderBase]: For 35184/35184 co-relation queries the response was YES. [2023-08-03 20:40:59,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685343 conditions, 337065 events. 282559/337065 cut-off events. For 35184/35184 co-relation queries the response was YES. Maximal size of possible extension queue 6293. Compared 1588640 event pairs, 121223 based on Foata normal form. 0/188807 useless extension candidates. Maximal degree in co-relation 224681. Up to 327393 conditions per place. [2023-08-03 20:41:01,208 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 59 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-03 20:41:01,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-03 20:41:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:41:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:41:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-03 20:41:01,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-03 20:41:01,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-03 20:41:01,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-03 20:41:01,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:41:01,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-03 20:41:01,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:01,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:01,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:01,221 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 609 transitions. [2023-08-03 20:41:01,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-03 20:41:01,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:41:01,248 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 246 flow [2023-08-03 20:41:01,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-03 20:41:01,249 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-03 20:41:01,249 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 246 flow [2023-08-03 20:41:01,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:01,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:41:01,250 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:41:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:41:01,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:41:01,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:41:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2026015434, now seen corresponding path program 1 times [2023-08-03 20:41:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:41:01,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350892495] [2023-08-03 20:41:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:41:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:01,335 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 20:41:01,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:41:01,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350892495] [2023-08-03 20:41:01,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350892495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:41:01,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720405200] [2023-08-03 20:41:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:01,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:01,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:41:01,340 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 20:41:01,343 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 20:41:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:01,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:41:01,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:41:01,490 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 20:41:01,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:41:01,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720405200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:41:01,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:41:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:41:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509655127] [2023-08-03 20:41:01,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:41:01,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:41:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:41:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:41:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:41:01,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-03 20:41:01,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 182.8) internal successors, (914), 5 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:01,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:41:01,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-03 20:41:01,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:41:21,751 INFO L124 PetriNetUnfolderBase]: 282509/337009 cut-off events. [2023-08-03 20:41:21,751 INFO L125 PetriNetUnfolderBase]: For 35164/35164 co-relation queries the response was YES. [2023-08-03 20:41:22,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685241 conditions, 337009 events. 282509/337009 cut-off events. For 35164/35164 co-relation queries the response was YES. Maximal size of possible extension queue 6409. Compared 1589746 event pairs, 98664 based on Foata normal form. 9/188798 useless extension candidates. Maximal degree in co-relation 392073. Up to 327295 conditions per place. [2023-08-03 20:41:23,554 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 62 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-08-03 20:41:23,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 390 flow [2023-08-03 20:41:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:41:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:41:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 972 transitions. [2023-08-03 20:41:23,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46285714285714286 [2023-08-03 20:41:23,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 972 transitions. [2023-08-03 20:41:23,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 972 transitions. [2023-08-03 20:41:23,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:41:23,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 972 transitions. [2023-08-03 20:41:23,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.4) internal successors, (972), 5 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:23,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:23,569 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:23,570 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 246 flow. Second operand 5 states and 972 transitions. [2023-08-03 20:41:23,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 390 flow [2023-08-03 20:41:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 380 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:41:23,605 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 251 flow [2023-08-03 20:41:23,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-03 20:41:23,607 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-03 20:41:23,608 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 251 flow [2023-08-03 20:41:23,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.8) internal successors, (914), 5 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:23,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:41:23,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:41:23,618 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 20:41:23,813 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 20:41:23,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:41:23,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:41:23,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1635938419, now seen corresponding path program 1 times [2023-08-03 20:41:23,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:41:23,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304896903] [2023-08-03 20:41:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:23,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:41:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:23,875 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 20:41:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:41:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304896903] [2023-08-03 20:41:23,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304896903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:41:23,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600991703] [2023-08-03 20:41:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:23,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:41:23,883 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 20:41:24,084 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 20:41:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:24,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:41:24,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:41:24,148 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 20:41:24,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:41:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600991703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:41:24,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:41:24,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:41:24,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202714547] [2023-08-03 20:41:24,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:41:24,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:41:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:41:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:41:24,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:41:24,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-03 20:41:24,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:24,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:41:24,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-03 20:41:24,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:41:44,126 INFO L124 PetriNetUnfolderBase]: 278777/332617 cut-off events. [2023-08-03 20:41:44,126 INFO L125 PetriNetUnfolderBase]: For 28847/28847 co-relation queries the response was YES. [2023-08-03 20:41:44,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673655 conditions, 332617 events. 278777/332617 cut-off events. For 28847/28847 co-relation queries the response was YES. Maximal size of possible extension queue 6522. Compared 1588844 event pairs, 119869 based on Foata normal form. 0/186401 useless extension candidates. Maximal degree in co-relation 231660. Up to 322781 conditions per place. [2023-08-03 20:41:45,801 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 64 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-03 20:41:45,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 401 flow [2023-08-03 20:41:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:41:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:41:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-03 20:41:45,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-03 20:41:45,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-03 20:41:45,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-03 20:41:45,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:41:45,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-03 20:41:45,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:45,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:45,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:45,811 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 251 flow. Second operand 3 states and 612 transitions. [2023-08-03 20:41:45,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 401 flow [2023-08-03 20:41:45,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 394 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:41:45,829 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 259 flow [2023-08-03 20:41:45,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-08-03 20:41:45,830 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-08-03 20:41:45,830 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 259 flow [2023-08-03 20:41:45,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:45,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:41:45,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:41:45,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 20:41:46,031 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 20:41:46,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:41:46,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:41:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash 930284318, now seen corresponding path program 1 times [2023-08-03 20:41:46,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:41:46,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564595910] [2023-08-03 20:41:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:46,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:41:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:46,106 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 20:41:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:41:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564595910] [2023-08-03 20:41:46,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564595910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:41:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486413408] [2023-08-03 20:41:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:46,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:41:46,109 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 20:41:46,114 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 20:41:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:46,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:41:46,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:41:46,214 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 20:41:46,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:41:46,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486413408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:41:46,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:41:46,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:41:46,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366464296] [2023-08-03 20:41:46,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:41:46,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:41:46,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:41:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:41:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:41:46,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-03 20:41:46,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:46,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:41:46,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-03 20:41:46,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:42:09,108 INFO L124 PetriNetUnfolderBase]: 278153/334081 cut-off events. [2023-08-03 20:42:09,133 INFO L125 PetriNetUnfolderBase]: For 21696/21696 co-relation queries the response was YES. [2023-08-03 20:42:10,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674690 conditions, 334081 events. 278153/334081 cut-off events. For 21696/21696 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 1675953 event pairs, 118825 based on Foata normal form. 0/188393 useless extension candidates. Maximal degree in co-relation 232257. Up to 318849 conditions per place. [2023-08-03 20:42:11,182 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 70 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-03 20:42:11,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 427 flow [2023-08-03 20:42:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:42:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:42:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-03 20:42:11,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-08-03 20:42:11,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-03 20:42:11,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-03 20:42:11,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:42:11,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-03 20:42:11,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:11,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:11,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:11,190 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 259 flow. Second operand 3 states and 616 transitions. [2023-08-03 20:42:11,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 427 flow [2023-08-03 20:42:11,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:42:11,200 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 268 flow [2023-08-03 20:42:11,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-08-03 20:42:11,200 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-03 20:42:11,201 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 268 flow [2023-08-03 20:42:11,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:11,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:42:11,201 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:42:11,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 20:42:11,402 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 20:42:11,403 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 (and 1 more)] === [2023-08-03 20:42:11,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:42:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash -395015766, now seen corresponding path program 1 times [2023-08-03 20:42:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:42:11,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454570273] [2023-08-03 20:42:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:11,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:42:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:11,455 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 20:42:11,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:42:11,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454570273] [2023-08-03 20:42:11,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454570273] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:42:11,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906435397] [2023-08-03 20:42:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:11,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:42:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:42:11,457 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 20:42:11,460 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 20:42:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:11,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:42:11,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:42:11,558 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 20:42:11,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:42:11,579 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 20:42:11,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906435397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:42:11,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:42:11,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:42:11,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419655517] [2023-08-03 20:42:11,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:42:11,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:42:11,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:42:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:42:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:42:11,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-03 20:42:11,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:11,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:42:11,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-03 20:42:11,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:42:31,610 INFO L124 PetriNetUnfolderBase]: 270979/325098 cut-off events. [2023-08-03 20:42:31,610 INFO L125 PetriNetUnfolderBase]: For 22473/22473 co-relation queries the response was YES. [2023-08-03 20:42:32,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659098 conditions, 325098 events. 270979/325098 cut-off events. For 22473/22473 co-relation queries the response was YES. Maximal size of possible extension queue 7112. Compared 1620287 event pairs, 95892 based on Foata normal form. 3/184668 useless extension candidates. Maximal degree in co-relation 186197. Up to 313776 conditions per place. [2023-08-03 20:42:33,590 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 64 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-03 20:42:33,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 410 flow [2023-08-03 20:42:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:42:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:42:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 790 transitions. [2023-08-03 20:42:33,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2023-08-03 20:42:33,593 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 790 transitions. [2023-08-03 20:42:33,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 790 transitions. [2023-08-03 20:42:33,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:42:33,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 790 transitions. [2023-08-03 20:42:33,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.5) internal successors, (790), 4 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 20:42:33,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:33,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:33,599 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 268 flow. Second operand 4 states and 790 transitions. [2023-08-03 20:42:33,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 410 flow [2023-08-03 20:42:33,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 408 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:42:33,611 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 264 flow [2023-08-03 20:42:33,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2023-08-03 20:42:33,612 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 20:42:33,612 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 264 flow [2023-08-03 20:42:33,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:33,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:42:33,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:42:33,622 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 20:42:33,823 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 20:42:33,823 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 (and 1 more)] === [2023-08-03 20:42:33,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:42:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash 899980865, now seen corresponding path program 1 times [2023-08-03 20:42:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:42:33,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540734321] [2023-08-03 20:42:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:33,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:42:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:33,883 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 20:42:33,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:42:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540734321] [2023-08-03 20:42:33,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540734321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:42:33,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530448215] [2023-08-03 20:42:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:33,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:42:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:42:33,886 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 20:42:33,889 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 20:42:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:33,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:42:33,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:42:34,002 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 20:42:34,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:42:34,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530448215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:42:34,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:42:34,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:42:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365590733] [2023-08-03 20:42:34,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:42:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:42:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:42:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:42:34,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:42:34,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-03 20:42:34,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:34,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:42:34,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-03 20:42:34,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:42:53,562 INFO L124 PetriNetUnfolderBase]: 270385/324423 cut-off events. [2023-08-03 20:42:53,562 INFO L125 PetriNetUnfolderBase]: For 21950/21950 co-relation queries the response was YES. [2023-08-03 20:42:54,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657379 conditions, 324423 events. 270385/324423 cut-off events. For 21950/21950 co-relation queries the response was YES. Maximal size of possible extension queue 7094. Compared 1615542 event pairs, 52863 based on Foata normal form. 81/184368 useless extension candidates. Maximal degree in co-relation 286135. Up to 312342 conditions per place. [2023-08-03 20:42:55,478 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 76 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2023-08-03 20:42:55,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 462 flow [2023-08-03 20:42:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:42:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:42:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 984 transitions. [2023-08-03 20:42:55,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2023-08-03 20:42:55,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 984 transitions. [2023-08-03 20:42:55,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 984 transitions. [2023-08-03 20:42:55,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:42:55,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 984 transitions. [2023-08-03 20:42:55,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:55,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:55,488 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:55,488 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 264 flow. Second operand 5 states and 984 transitions. [2023-08-03 20:42:55,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 462 flow [2023-08-03 20:42:55,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 448 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:42:55,503 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 267 flow [2023-08-03 20:42:55,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2023-08-03 20:42:55,504 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 20:42:55,504 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 267 flow [2023-08-03 20:42:55,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:55,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:42:55,505 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] [2023-08-03 20:42:55,509 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 20:42:55,705 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 20:42:55,705 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:42:55,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:42:55,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1374446388, now seen corresponding path program 1 times [2023-08-03 20:42:55,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:42:55,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564957664] [2023-08-03 20:42:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:55,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:42:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:55,750 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 20:42:55,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:42:55,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564957664] [2023-08-03 20:42:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564957664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:42:55,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920722442] [2023-08-03 20:42:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:55,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:42:55,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:42:55,752 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 20:42:55,754 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 20:42:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:55,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:42:55,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:42:55,843 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 20:42:55,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:42:55,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920722442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:42:55,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:42:55,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:42:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898926836] [2023-08-03 20:42:55,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:42:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:42:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:42:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:42:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:42:55,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-03 20:42:55,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 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 20:42:55,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:42:55,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-03 20:42:55,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:43:14,708 INFO L124 PetriNetUnfolderBase]: 230668/278064 cut-off events. [2023-08-03 20:43:14,708 INFO L125 PetriNetUnfolderBase]: For 14554/14554 co-relation queries the response was YES. [2023-08-03 20:43:15,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562562 conditions, 278064 events. 230668/278064 cut-off events. For 14554/14554 co-relation queries the response was YES. Maximal size of possible extension queue 6404. Compared 1394577 event pairs, 92028 based on Foata normal form. 0/158691 useless extension candidates. Maximal degree in co-relation 253648. Up to 230759 conditions per place. [2023-08-03 20:43:16,506 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 79 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-03 20:43:16,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 483 flow [2023-08-03 20:43:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:43:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:43:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-03 20:43:16,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-03 20:43:16,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-03 20:43:16,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-03 20:43:16,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:43:16,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-03 20:43:16,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:16,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:16,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:16,514 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 267 flow. Second operand 3 states and 624 transitions. [2023-08-03 20:43:16,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 483 flow [2023-08-03 20:43:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 476 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:43:16,529 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 272 flow [2023-08-03 20:43:16,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-03 20:43:16,530 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 20:43:16,530 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 272 flow [2023-08-03 20:43:16,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 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 20:43:16,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:43:16,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:43:16,537 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 20:43:16,735 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 20:43:16,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:43:16,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:43:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash -913534003, now seen corresponding path program 1 times [2023-08-03 20:43:16,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:43:16,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454243538] [2023-08-03 20:43:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:16,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:43:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:43:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:43:16,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454243538] [2023-08-03 20:43:16,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454243538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:43:16,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489107152] [2023-08-03 20:43:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:16,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:43:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:43:16,799 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 20:43:16,805 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 20:43:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:16,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:43:16,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:43:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:43:16,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:43:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:43:16,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489107152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:43:16,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:43:16,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:43:16,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408129983] [2023-08-03 20:43:16,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:43:16,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:43:16,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:43:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:43:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:43:16,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-03 20:43:16,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:16,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:43:16,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-03 20:43:16,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:43:33,684 INFO L124 PetriNetUnfolderBase]: 218491/263160 cut-off events. [2023-08-03 20:43:33,684 INFO L125 PetriNetUnfolderBase]: For 21347/21347 co-relation queries the response was YES. [2023-08-03 20:43:34,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541883 conditions, 263160 events. 218491/263160 cut-off events. For 21347/21347 co-relation queries the response was YES. Maximal size of possible extension queue 6440. Compared 1319298 event pairs, 78674 based on Foata normal form. 27/153121 useless extension candidates. Maximal degree in co-relation 248918. Up to 253901 conditions per place. [2023-08-03 20:43:35,091 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 73 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-03 20:43:35,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 448 flow [2023-08-03 20:43:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:43:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:43:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 798 transitions. [2023-08-03 20:43:35,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-03 20:43:35,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 798 transitions. [2023-08-03 20:43:35,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 798 transitions. [2023-08-03 20:43:35,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:43:35,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 798 transitions. [2023-08-03 20:43:35,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:35,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:35,098 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:35,098 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 272 flow. Second operand 4 states and 798 transitions. [2023-08-03 20:43:35,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 448 flow [2023-08-03 20:43:35,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:43:35,409 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 268 flow [2023-08-03 20:43:35,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-08-03 20:43:35,409 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-03 20:43:35,410 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 268 flow [2023-08-03 20:43:35,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:35,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:43:35,410 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:43:35,416 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 20:43:35,615 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 20:43:35,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:43:35,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:43:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2120234537, now seen corresponding path program 1 times [2023-08-03 20:43:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:43:35,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584134743] [2023-08-03 20:43:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:35,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:43:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:43:35,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:43:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584134743] [2023-08-03 20:43:35,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584134743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:43:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209148647] [2023-08-03 20:43:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:35,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:43:35,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:43:35,704 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 20:43:35,709 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 20:43:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:35,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:43:35,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:43:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:43:35,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:43:35,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209148647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:43:35,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:43:35,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:43:35,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198496265] [2023-08-03 20:43:35,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:43:35,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:43:35,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:43:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:43:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:43:35,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-03 20:43:35,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:35,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:43:35,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-03 20:43:35,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:43:51,382 INFO L124 PetriNetUnfolderBase]: 212659/255575 cut-off events. [2023-08-03 20:43:51,382 INFO L125 PetriNetUnfolderBase]: For 20129/20129 co-relation queries the response was YES. [2023-08-03 20:43:52,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525469 conditions, 255575 events. 212659/255575 cut-off events. For 20129/20129 co-relation queries the response was YES. Maximal size of possible extension queue 6299. Compared 1257576 event pairs, 10590 based on Foata normal form. 729/149154 useless extension candidates. Maximal degree in co-relation 243708. Up to 237039 conditions per place. [2023-08-03 20:43:53,057 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 89 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2023-08-03 20:43:53,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 516 flow [2023-08-03 20:43:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:43:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:43:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 996 transitions. [2023-08-03 20:43:53,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2023-08-03 20:43:53,060 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 996 transitions. [2023-08-03 20:43:53,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 996 transitions. [2023-08-03 20:43:53,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:43:53,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 996 transitions. [2023-08-03 20:43:53,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.2) internal successors, (996), 5 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:53,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:53,065 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:53,065 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 268 flow. Second operand 5 states and 996 transitions. [2023-08-03 20:43:53,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 516 flow [2023-08-03 20:43:53,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 502 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:43:53,181 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 271 flow [2023-08-03 20:43:53,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-08-03 20:43:53,181 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-03 20:43:53,181 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 271 flow [2023-08-03 20:43:53,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:53,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:43:53,182 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, 1] [2023-08-03 20:43:53,190 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 20:43:53,390 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 20:43:53,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:43:53,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:43:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1691348527, now seen corresponding path program 1 times [2023-08-03 20:43:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:43:53,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310921084] [2023-08-03 20:43:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:53,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:43:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:53,462 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 20:43:53,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:43:53,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310921084] [2023-08-03 20:43:53,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310921084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:43:53,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017028520] [2023-08-03 20:43:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:53,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:43:53,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:43:53,464 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 20:43:53,467 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 20:43:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:53,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:43:53,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:43:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:43:53,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:43:53,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017028520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:43:53,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:43:53,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:43:53,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82188709] [2023-08-03 20:43:53,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:43:53,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:43:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:43:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:43:53,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:43:53,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-03 20:43:53,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 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 20:43:53,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:43:53,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-03 20:43:53,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:44:08,597 INFO L124 PetriNetUnfolderBase]: 195528/237627 cut-off events. [2023-08-03 20:44:08,598 INFO L125 PetriNetUnfolderBase]: For 20564/20564 co-relation queries the response was YES. [2023-08-03 20:44:09,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489071 conditions, 237627 events. 195528/237627 cut-off events. For 20564/20564 co-relation queries the response was YES. Maximal size of possible extension queue 5066. Compared 1212442 event pairs, 71309 based on Foata normal form. 0/140917 useless extension candidates. Maximal degree in co-relation 235371. Up to 171899 conditions per place. [2023-08-03 20:44:10,171 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-03 20:44:10,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 487 flow [2023-08-03 20:44:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:44:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:44:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-03 20:44:10,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-03 20:44:10,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-03 20:44:10,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-03 20:44:10,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:44:10,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-03 20:44:10,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:10,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:10,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:10,176 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 271 flow. Second operand 3 states and 624 transitions. [2023-08-03 20:44:10,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 487 flow [2023-08-03 20:44:10,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 480 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:44:10,275 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 276 flow [2023-08-03 20:44:10,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-03 20:44:10,276 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 13 predicate places. [2023-08-03 20:44:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 276 flow [2023-08-03 20:44:10,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 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 20:44:10,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:44:10,277 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:44:10,282 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 20:44:10,479 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 20:44:10,480 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:44:10,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:44:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2123665476, now seen corresponding path program 1 times [2023-08-03 20:44:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:44:10,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418775091] [2023-08-03 20:44:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:44:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:44:10,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:44:10,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418775091] [2023-08-03 20:44:10,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418775091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:44:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381387189] [2023-08-03 20:44:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:10,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:10,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:44:10,566 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 20:44:10,569 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 20:44:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:10,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:44:10,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:44:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:44:10,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:44:10,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381387189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:44:10,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:44:10,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:44:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116579040] [2023-08-03 20:44:10,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:44:10,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:44:10,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:44:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:44:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:44:10,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-03 20:44:10,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 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 20:44:10,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:44:10,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-03 20:44:10,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:44:28,034 INFO L124 PetriNetUnfolderBase]: 194462/237042 cut-off events. [2023-08-03 20:44:28,034 INFO L125 PetriNetUnfolderBase]: For 24557/24557 co-relation queries the response was YES. [2023-08-03 20:44:28,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497044 conditions, 237042 events. 194462/237042 cut-off events. For 24557/24557 co-relation queries the response was YES. Maximal size of possible extension queue 4793. Compared 1216965 event pairs, 84459 based on Foata normal form. 0/143960 useless extension candidates. Maximal degree in co-relation 242597. Up to 202426 conditions per place. [2023-08-03 20:44:29,373 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 81 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-03 20:44:29,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 494 flow [2023-08-03 20:44:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:44:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:44:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-03 20:44:29,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-03 20:44:29,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-03 20:44:29,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-03 20:44:29,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:44:29,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-03 20:44:29,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:29,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:29,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:29,379 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 276 flow. Second operand 3 states and 624 transitions. [2023-08-03 20:44:29,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 494 flow [2023-08-03 20:44:31,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:44:31,690 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 286 flow [2023-08-03 20:44:31,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2023-08-03 20:44:31,690 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2023-08-03 20:44:31,691 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 286 flow [2023-08-03 20:44:31,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 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 20:44:31,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:44:31,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:44:31,696 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 20:44:31,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 20:44:31,892 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:44:31,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:44:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1977235426, now seen corresponding path program 1 times [2023-08-03 20:44:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:44:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477478647] [2023-08-03 20:44:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:44:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:44:31,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:44:31,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477478647] [2023-08-03 20:44:31,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477478647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:44:31,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667297174] [2023-08-03 20:44:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:31,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:31,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:44:31,951 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 20:44:31,973 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 20:44:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:32,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:44:32,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:44:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:44:32,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:44:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:44:32,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667297174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:44:32,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:44:32,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:44:32,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887120154] [2023-08-03 20:44:32,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:44:32,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:44:32,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:44:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:44:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:44:32,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-03 20:44:32,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:32,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:44:32,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-03 20:44:32,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:44:47,523 INFO L124 PetriNetUnfolderBase]: 188657/229941 cut-off events. [2023-08-03 20:44:47,524 INFO L125 PetriNetUnfolderBase]: For 22084/22084 co-relation queries the response was YES. [2023-08-03 20:44:48,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484107 conditions, 229941 events. 188657/229941 cut-off events. For 22084/22084 co-relation queries the response was YES. Maximal size of possible extension queue 5054. Compared 1202043 event pairs, 67625 based on Foata normal form. 243/140496 useless extension candidates. Maximal degree in co-relation 400633. Up to 212649 conditions per place. [2023-08-03 20:44:49,039 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 83 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-03 20:44:49,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 498 flow [2023-08-03 20:44:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:44:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:44:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2023-08-03 20:44:49,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797619047619048 [2023-08-03 20:44:49,041 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2023-08-03 20:44:49,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2023-08-03 20:44:49,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:44:49,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2023-08-03 20:44:49,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:49,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:49,045 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:49,046 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 286 flow. Second operand 4 states and 806 transitions. [2023-08-03 20:44:49,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 498 flow [2023-08-03 20:44:53,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:44:53,756 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 282 flow [2023-08-03 20:44:53,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-08-03 20:44:53,757 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2023-08-03 20:44:53,757 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 282 flow [2023-08-03 20:44:53,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:53,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:44:53,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:44:53,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-03 20:44:53,958 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,SelfDestructingSolverStorable13 [2023-08-03 20:44:53,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:44:53,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:44:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1472343446, now seen corresponding path program 1 times [2023-08-03 20:44:53,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:44:53,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079782006] [2023-08-03 20:44:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:53,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:44:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:44:54,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:44:54,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079782006] [2023-08-03 20:44:54,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079782006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:44:54,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054155147] [2023-08-03 20:44:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:54,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:54,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:44:54,060 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 20:44:54,065 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 20:44:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:54,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:44:54,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:44:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:44:54,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:44:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:44:54,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054155147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:44:54,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:44:54,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:44:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044246271] [2023-08-03 20:44:54,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:44:54,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:44:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:44:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:44:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:44:54,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-03 20:44:54,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 188.2) internal successors, (941), 5 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:44:54,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:44:54,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-03 20:44:54,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:45:02,625 INFO L124 PetriNetUnfolderBase]: 121202/148230 cut-off events. [2023-08-03 20:45:02,625 INFO L125 PetriNetUnfolderBase]: For 17421/17421 co-relation queries the response was YES. [2023-08-03 20:45:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311729 conditions, 148230 events. 121202/148230 cut-off events. For 17421/17421 co-relation queries the response was YES. Maximal size of possible extension queue 2635. Compared 719603 event pairs, 29065 based on Foata normal form. 1458/91500 useless extension candidates. Maximal degree in co-relation 290959. Up to 71816 conditions per place. [2023-08-03 20:45:03,835 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-03 20:45:03,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 107 transitions, 548 flow [2023-08-03 20:45:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:45:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:45:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 815 transitions. [2023-08-03 20:45:03,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2023-08-03 20:45:03,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 815 transitions. [2023-08-03 20:45:03,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 815 transitions. [2023-08-03 20:45:03,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:45:03,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 815 transitions. [2023-08-03 20:45:03,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:45:03,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:45:03,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:45:03,842 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 282 flow. Second operand 4 states and 815 transitions. [2023-08-03 20:45:03,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 107 transitions, 548 flow