/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:06:54,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:06:54,813 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:06:54,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:06:54,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:06:54,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:06:54,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:06:54,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:06:54,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:06:54,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:06:54,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:06:54,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:06:54,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:06:54,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:06:54,856 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:06:54,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:06:54,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:06:54,857 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:06:54,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:06:54,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:06:54,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:06:54,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:06:54,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:06:54,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:06:54,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:06:54,860 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:06:54,860 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:06:54,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:06:54,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:06:54,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:06:54,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:54,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:06:54,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:06:54,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:06:54,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:06:54,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:06:54,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:06:54,863 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:06:54,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:06:54,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:06:54,863 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:06:54,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:06:55,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:06:55,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:06:55,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:06:55,110 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:06:55,110 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:06:55,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-subst.wvr_bound2.c [2023-08-04 02:06:56,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:06:56,424 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:06:56,425 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-subst.wvr_bound2.c [2023-08-04 02:06:56,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f5362251/e725cf84564949f5ac7520b8c3faaba5/FLAG2492028f8 [2023-08-04 02:06:56,451 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f5362251/e725cf84564949f5ac7520b8c3faaba5 [2023-08-04 02:06:56,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:06:56,458 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:06:56,461 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:56,461 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:06:56,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:06:56,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f7a5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56, skipping insertion in model container [2023-08-04 02:06:56,466 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,501 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:06:56,674 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_chl-node-subst.wvr_bound2.c[4239,4252] [2023-08-04 02:06:56,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:56,690 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:06:56,728 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_chl-node-subst.wvr_bound2.c[4239,4252] [2023-08-04 02:06:56,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:56,755 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:06:56,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56 WrapperNode [2023-08-04 02:06:56,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:56,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:56,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:06:56,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:06:56,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,813 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 479 [2023-08-04 02:06:56,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:56,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:06:56,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:06:56,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:06:56,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:06:56,863 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:06:56,863 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:06:56,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:06:56,864 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (1/1) ... [2023-08-04 02:06:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:56,894 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) [2023-08-04 02:06:56,919 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 [2023-08-04 02:06:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:06:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:06:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:06:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:06:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:06:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:06:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:06:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:06:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:06:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:06:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:06:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:06:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:06:56,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:06:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:06:56,951 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:06:57,107 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:06:57,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:06:57,640 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:06:57,658 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:06:57,658 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 02:06:57,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:57 BoogieIcfgContainer [2023-08-04 02:06:57,661 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:06:57,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:06:57,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:06:57,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:06:57,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:06:56" (1/3) ... [2023-08-04 02:06:57,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f7252d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:57, skipping insertion in model container [2023-08-04 02:06:57,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:56" (2/3) ... [2023-08-04 02:06:57,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f7252d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:57, skipping insertion in model container [2023-08-04 02:06:57,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:57" (3/3) ... [2023-08-04 02:06:57,671 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-node-subst.wvr_bound2.c [2023-08-04 02:06:57,679 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:06:57,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:06:57,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:06:57,700 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:06:57,826 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:06:57,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 02:06:58,272 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 02:06:58,272 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 02:06:58,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 02:06:58,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 02:06:58,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 549 transitions, 1140 flow [2023-08-04 02:06:58,313 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:58,326 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 02:06:58,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 02:06:58,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 02:06:58,577 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 02:06:58,578 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 02:06:58,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 02:06:58,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 36000 [2023-08-04 02:07:14,726 INFO L134 LiptonReduction]: Checked pairs total: 57272 [2023-08-04 02:07:14,727 INFO L136 LiptonReduction]: Total number of compositions: 594 [2023-08-04 02:07:14,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:07:14,742 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;@757780b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:07:14,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:07:14,749 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:07:14,749 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2023-08-04 02:07:14,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:07:14,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:14,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:14,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:14,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508096, now seen corresponding path program 1 times [2023-08-04 02:07:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:14,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202156741] [2023-08-04 02:07:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:07:15,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:15,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202156741] [2023-08-04 02:07:15,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202156741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:15,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:15,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:07:15,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274562406] [2023-08-04 02:07:15,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:15,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:07:15,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:07:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:07:15,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1143 [2023-08-04 02:07:15,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 492.3333333333333) internal successors, (1477), 3 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:15,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:15,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1143 [2023-08-04 02:07:15,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:18,179 INFO L124 PetriNetUnfolderBase]: 23687/32506 cut-off events. [2023-08-04 02:07:18,179 INFO L125 PetriNetUnfolderBase]: For 1432/1432 co-relation queries the response was YES. [2023-08-04 02:07:18,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65277 conditions, 32506 events. 23687/32506 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 173012 event pairs, 17710 based on Foata normal form. 0/24252 useless extension candidates. Maximal degree in co-relation 57820. Up to 31814 conditions per place. [2023-08-04 02:07:18,280 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 50 selfloop transitions, 2 changer transitions 22/77 dead transitions. [2023-08-04 02:07:18,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 338 flow [2023-08-04 02:07:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:07:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:07:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1540 transitions. [2023-08-04 02:07:18,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44911052785068534 [2023-08-04 02:07:18,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1540 transitions. [2023-08-04 02:07:18,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1540 transitions. [2023-08-04 02:07:18,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:18,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1540 transitions. [2023-08-04 02:07:18,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.3333333333334) internal successors, (1540), 3 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:18,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:18,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:18,321 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 196 flow. Second operand 3 states and 1540 transitions. [2023-08-04 02:07:18,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 338 flow [2023-08-04 02:07:18,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:07:18,355 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 135 flow [2023-08-04 02:07:18,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-04 02:07:18,360 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 02:07:18,360 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 135 flow [2023-08-04 02:07:18,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 492.3333333333333) internal successors, (1477), 3 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:18,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:18,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:18,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:07:18,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:18,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash 469510583, now seen corresponding path program 1 times [2023-08-04 02:07:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888908015] [2023-08-04 02:07:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:07:18,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888908015] [2023-08-04 02:07:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888908015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:18,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:18,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519368607] [2023-08-04 02:07:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:07:18,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 02:07:18,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 489.75) internal successors, (1959), 4 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:18,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:18,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 02:07:18,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:19,326 INFO L124 PetriNetUnfolderBase]: 6272/8687 cut-off events. [2023-08-04 02:07:19,327 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-04 02:07:19,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17568 conditions, 8687 events. 6272/8687 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 38590 event pairs, 4732 based on Foata normal form. 0/7057 useless extension candidates. Maximal degree in co-relation 17554. Up to 8644 conditions per place. [2023-08-04 02:07:19,370 INFO L140 encePairwiseOnDemand]: 1138/1143 looper letters, 49 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-04 02:07:19,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 243 flow [2023-08-04 02:07:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2002 transitions. [2023-08-04 02:07:19,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378827646544182 [2023-08-04 02:07:19,376 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2002 transitions. [2023-08-04 02:07:19,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2002 transitions. [2023-08-04 02:07:19,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:19,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2002 transitions. [2023-08-04 02:07:19,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.5) internal successors, (2002), 4 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:19,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:19,392 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:19,393 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 135 flow. Second operand 4 states and 2002 transitions. [2023-08-04 02:07:19,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 243 flow [2023-08-04 02:07:19,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 239 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:07:19,397 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 149 flow [2023-08-04 02:07:19,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-04 02:07:19,400 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-08-04 02:07:19,404 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 149 flow [2023-08-04 02:07:19,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 489.75) internal successors, (1959), 4 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:19,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:19,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:19,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:07:19,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:19,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash -688796857, now seen corresponding path program 1 times [2023-08-04 02:07:19,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:19,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530057046] [2023-08-04 02:07:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:19,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:07:19,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530057046] [2023-08-04 02:07:19,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530057046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:19,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:19,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353603042] [2023-08-04 02:07:19,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:19,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:19,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:07:19,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 02:07:19,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:19,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:19,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 02:07:19,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:20,263 INFO L124 PetriNetUnfolderBase]: 6272/8675 cut-off events. [2023-08-04 02:07:20,263 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-08-04 02:07:20,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17551 conditions, 8675 events. 6272/8675 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 38433 event pairs, 4732 based on Foata normal form. 0/7046 useless extension candidates. Maximal degree in co-relation 17528. Up to 8646 conditions per place. [2023-08-04 02:07:20,298 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 51 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-04 02:07:20,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 259 flow [2023-08-04 02:07:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 02:07:20,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376640419947507 [2023-08-04 02:07:20,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 02:07:20,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 02:07:20,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:20,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 02:07:20,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:20,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:20,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:20,321 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 149 flow. Second operand 4 states and 2001 transitions. [2023-08-04 02:07:20,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 259 flow [2023-08-04 02:07:20,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:07:20,323 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 162 flow [2023-08-04 02:07:20,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-04 02:07:20,324 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-08-04 02:07:20,324 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 162 flow [2023-08-04 02:07:20,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:20,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:20,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:20,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:07:20,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:20,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1074058110, now seen corresponding path program 1 times [2023-08-04 02:07:20,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:20,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909669251] [2023-08-04 02:07:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:20,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:07:20,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:20,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909669251] [2023-08-04 02:07:20,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909669251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:20,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:20,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081903959] [2023-08-04 02:07:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:20,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:07:20,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 02:07:20,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 490.25) internal successors, (1961), 4 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:20,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:20,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 02:07:20,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:21,094 INFO L124 PetriNetUnfolderBase]: 6272/8676 cut-off events. [2023-08-04 02:07:21,094 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-04 02:07:21,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17560 conditions, 8676 events. 6272/8676 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 38422 event pairs, 4732 based on Foata normal form. 0/7048 useless extension candidates. Maximal degree in co-relation 17535. Up to 8647 conditions per place. [2023-08-04 02:07:21,131 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 52 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-04 02:07:21,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 58 transitions, 274 flow [2023-08-04 02:07:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 02:07:21,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376640419947507 [2023-08-04 02:07:21,137 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 02:07:21,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 02:07:21,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:21,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 02:07:21,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,151 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,151 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 162 flow. Second operand 4 states and 2001 transitions. [2023-08-04 02:07:21,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 58 transitions, 274 flow [2023-08-04 02:07:21,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 268 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:07:21,153 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 170 flow [2023-08-04 02:07:21,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-08-04 02:07:21,154 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-04 02:07:21,154 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 170 flow [2023-08-04 02:07:21,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.25) internal successors, (1961), 4 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:21,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:07:21,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:21,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash -374925094, now seen corresponding path program 1 times [2023-08-04 02:07:21,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:21,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590354066] [2023-08-04 02:07:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:07:21,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:21,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590354066] [2023-08-04 02:07:21,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590354066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:21,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:21,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835461852] [2023-08-04 02:07:21,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:21,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:07:21,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 02:07:21,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 490.5) internal successors, (1962), 4 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:21,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 02:07:21,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:21,895 INFO L124 PetriNetUnfolderBase]: 6272/8677 cut-off events. [2023-08-04 02:07:21,895 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-08-04 02:07:21,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17566 conditions, 8677 events. 6272/8677 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 38459 event pairs, 4732 based on Foata normal form. 0/7050 useless extension candidates. Maximal degree in co-relation 17540. Up to 8648 conditions per place. [2023-08-04 02:07:21,937 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 53 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 02:07:21,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 284 flow [2023-08-04 02:07:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 02:07:21,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376640419947507 [2023-08-04 02:07:21,943 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 02:07:21,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 02:07:21,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:21,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 02:07:21,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,955 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,955 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 170 flow. Second operand 4 states and 2001 transitions. [2023-08-04 02:07:21,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 284 flow [2023-08-04 02:07:21,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 278 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:07:21,958 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 178 flow [2023-08-04 02:07:21,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-08-04 02:07:21,960 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-04 02:07:21,960 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 178 flow [2023-08-04 02:07:21,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.5) internal successors, (1962), 4 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:21,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:21,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:21,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 02:07:21,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:21,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1066124489, now seen corresponding path program 1 times [2023-08-04 02:07:21,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:21,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062191827] [2023-08-04 02:07:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:21,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:07:22,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:22,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062191827] [2023-08-04 02:07:22,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062191827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:07:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529650512] [2023-08-04 02:07:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:22,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:07:22,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:07:22,162 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) [2023-08-04 02:07:22,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:07:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:22,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:07:22,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:07:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 02:07:22,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:07:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529650512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:22,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:07:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-08-04 02:07:22,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136932611] [2023-08-04 02:07:22,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:22,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:22,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:22,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:22,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 02:07:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 02:07:22,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 490.75) internal successors, (1963), 4 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:22,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:22,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 02:07:22,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:23,069 INFO L124 PetriNetUnfolderBase]: 6272/8678 cut-off events. [2023-08-04 02:07:23,069 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-04 02:07:23,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17572 conditions, 8678 events. 6272/8678 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 38427 event pairs, 4732 based on Foata normal form. 0/7052 useless extension candidates. Maximal degree in co-relation 17545. Up to 8649 conditions per place. [2023-08-04 02:07:23,111 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 54 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 02:07:23,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 294 flow [2023-08-04 02:07:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 02:07:23,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376640419947507 [2023-08-04 02:07:23,116 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 02:07:23,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 02:07:23,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:23,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 02:07:23,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:23,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:23,128 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:23,128 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 178 flow. Second operand 4 states and 2001 transitions. [2023-08-04 02:07:23,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 294 flow [2023-08-04 02:07:23,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 288 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:07:23,131 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 186 flow [2023-08-04 02:07:23,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2023-08-04 02:07:23,131 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-04 02:07:23,132 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 186 flow [2023-08-04 02:07:23,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.75) internal successors, (1963), 4 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:23,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:23,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:23,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:07:23,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-04 02:07:23,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:23,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash -771235384, now seen corresponding path program 1 times [2023-08-04 02:07:23,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:23,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663950036] [2023-08-04 02:07:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:07:23,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:07:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:07:23,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:07:23,500 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:07:23,501 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:07:23,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:07:23,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:07:23,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 02:07:23,503 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:23,504 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:07:23,505 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:07:23,505 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:07:23,581 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:07:23,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 02:07:25,124 INFO L124 PetriNetUnfolderBase]: 966/5380 cut-off events. [2023-08-04 02:07:25,125 INFO L125 PetriNetUnfolderBase]: For 602/737 co-relation queries the response was YES. [2023-08-04 02:07:25,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 5380 events. 966/5380 cut-off events. For 602/737 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46932 event pairs, 22 based on Foata normal form. 0/4649 useless extension candidates. Maximal degree in co-relation 3352. Up to 192 conditions per place. [2023-08-04 02:07:25,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 02:07:25,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 705 transitions, 1500 flow [2023-08-04 02:07:25,297 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:07:25,297 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 705 transitions, 1500 flow [2023-08-04 02:07:25,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 705 transitions, 1500 flow [2023-08-04 02:07:25,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 02:07:26,328 INFO L124 PetriNetUnfolderBase]: 966/5380 cut-off events. [2023-08-04 02:07:26,328 INFO L125 PetriNetUnfolderBase]: For 602/737 co-relation queries the response was YES. [2023-08-04 02:07:26,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 5380 events. 966/5380 cut-off events. For 602/737 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46932 event pairs, 22 based on Foata normal form. 0/4649 useless extension candidates. Maximal degree in co-relation 3352. Up to 192 conditions per place. [2023-08-04 02:07:26,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 119520 [2023-08-04 02:07:42,585 INFO L134 LiptonReduction]: Checked pairs total: 261996 [2023-08-04 02:07:42,586 INFO L136 LiptonReduction]: Total number of compositions: 732 [2023-08-04 02:07:42,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:07:42,588 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;@757780b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:07:42,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:07:42,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:07:42,603 INFO L124 PetriNetUnfolderBase]: 15/146 cut-off events. [2023-08-04 02:07:42,603 INFO L125 PetriNetUnfolderBase]: For 12/16 co-relation queries the response was YES. [2023-08-04 02:07:42,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:42,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:42,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:07:42,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1462940495, now seen corresponding path program 1 times [2023-08-04 02:07:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:42,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238462947] [2023-08-04 02:07:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:07:42,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:42,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238462947] [2023-08-04 02:07:42,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238462947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:42,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:42,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:07:42,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086305103] [2023-08-04 02:07:42,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:42,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:07:42,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:07:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:07:42,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 627 out of 1437 [2023-08-04 02:07:42,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 630.6666666666666) internal successors, (1892), 3 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:42,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:42,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 627 of 1437 [2023-08-04 02:07:42,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand