/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:31:15,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:31:15,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:31:15,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:31:15,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:31:15,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:31:15,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:31:15,369 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:31:15,370 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:31:15,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:31:15,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:31:15,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:31:15,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:31:15,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:31:15,374 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:31:15,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:31:15,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:31:15,375 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:31:15,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:31:15,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:31:15,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:31:15,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:31:15,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:31:15,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:31:15,376 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:31:15,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:31:15,376 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:31:15,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:31:15,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:31:15,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:31:15,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:31:15,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:31:15,378 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:31:15,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:31:15,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:31:15,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:31:15,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:31:15,590 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:31:15,592 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:31:15,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-trans.wvr_bound2.c [2023-08-04 08:31:16,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:31:16,779 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:31:16,780 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-trans.wvr_bound2.c [2023-08-04 08:31:16,785 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c6b6ff3/b65f9eb8655f4b7d9d7eb38507189620/FLAGd4b2a99af [2023-08-04 08:31:16,800 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c6b6ff3/b65f9eb8655f4b7d9d7eb38507189620 [2023-08-04 08:31:16,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:31:16,806 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:31:16,807 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:31:16,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:31:16,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:31:16,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:31:16" (1/1) ... [2023-08-04 08:31:16,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa931f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:16, skipping insertion in model container [2023-08-04 08:31:16,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:31:16" (1/1) ... [2023-08-04 08:31:16,834 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:31:16,994 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-simpl-str-trans.wvr_bound2.c[2757,2770] [2023-08-04 08:31:17,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:31:17,010 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:31:17,046 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-simpl-str-trans.wvr_bound2.c[2757,2770] [2023-08-04 08:31:17,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:31:17,058 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:31:17,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17 WrapperNode [2023-08-04 08:31:17,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:31:17,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:31:17,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:31:17,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:31:17,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,071 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,102 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 217 [2023-08-04 08:31:17,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:31:17,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:31:17,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:31:17,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:31:17,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,112 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,119 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,120 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,123 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:31:17,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:31:17,124 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:31:17,124 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:31:17,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (1/1) ... [2023-08-04 08:31:17,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:31:17,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:17,169 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 08:31:17,174 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 08:31:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:31:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:31:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:31:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:31:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:31:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:31:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:31:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:31:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:31:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:31:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:31:17,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:31:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:31:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:31:17,196 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 08:31:17,279 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:31:17,281 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:31:17,552 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:31:17,558 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:31:17,559 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:31:17,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:31:17 BoogieIcfgContainer [2023-08-04 08:31:17,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:31:17,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:31:17,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:31:17,564 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:31:17,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:31:16" (1/3) ... [2023-08-04 08:31:17,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b06dab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:31:17, skipping insertion in model container [2023-08-04 08:31:17,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:17" (2/3) ... [2023-08-04 08:31:17,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b06dab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:31:17, skipping insertion in model container [2023-08-04 08:31:17,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:31:17" (3/3) ... [2023-08-04 08:31:17,566 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-simpl-str-trans.wvr_bound2.c [2023-08-04 08:31:17,571 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:31:17,577 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:31:17,577 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:31:17,577 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:31:17,700 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:31:17,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:17,927 INFO L124 PetriNetUnfolderBase]: 110/807 cut-off events. [2023-08-04 08:31:17,928 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:31:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 807 events. 110/807 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4853 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-04 08:31:17,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:17,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:17,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:17,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:17,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:17,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:18,072 INFO L124 PetriNetUnfolderBase]: 110/807 cut-off events. [2023-08-04 08:31:18,073 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:31:18,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 807 events. 110/807 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4853 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-04 08:31:18,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 22644 [2023-08-04 08:31:23,398 INFO L134 LiptonReduction]: Checked pairs total: 24633 [2023-08-04 08:31:23,398 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-04 08:31:23,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:31:23,413 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;@78d65cb1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:23,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:31:23,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:23,417 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 08:31:23,417 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:23,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:23,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:23,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:23,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1755041389, now seen corresponding path program 1 times [2023-08-04 08:31:23,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:23,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477729005] [2023-08-04 08:31:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:23,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:23,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:23,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477729005] [2023-08-04 08:31:23,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477729005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:23,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:23,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:31:23,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209578231] [2023-08-04 08:31:23,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:23,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-08-04 08:31:23,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states 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 08:31:23,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:23,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-08-04 08:31:23,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:23,722 INFO L124 PetriNetUnfolderBase]: 372/757 cut-off events. [2023-08-04 08:31:23,722 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-04 08:31:23,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 757 events. 372/757 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3633 event pairs, 188 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 1100. Up to 687 conditions per place. [2023-08-04 08:31:23,725 INFO L140 encePairwiseOnDemand]: 494/498 looper letters, 33 selfloop transitions, 2 changer transitions 4/42 dead transitions. [2023-08-04 08:31:23,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 198 flow [2023-08-04 08:31:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-08-04 08:31:23,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45314591700133866 [2023-08-04 08:31:23,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-08-04 08:31:23,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-08-04 08:31:23,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:23,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-08-04 08:31:23,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 08:31:23,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:23,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:23,759 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 124 flow. Second operand 3 states and 677 transitions. [2023-08-04 08:31:23,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 198 flow [2023-08-04 08:31:23,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:31:23,764 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 118 flow [2023-08-04 08:31:23,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-04 08:31:23,768 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 08:31:23,768 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 118 flow [2023-08-04 08:31:23,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states 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 08:31:23,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:23,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:23,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:31:23,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:23,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:23,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1535789625, now seen corresponding path program 1 times [2023-08-04 08:31:23,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786446137] [2023-08-04 08:31:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786446137] [2023-08-04 08:31:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786446137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026662764] [2023-08-04 08:31:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:23,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:23,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:23,876 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 08:31:23,885 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 08:31:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:23,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:23,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:23,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:23,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026662764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:23,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:23,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:23,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675487015] [2023-08-04 08:31:23,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:23,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:23,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:23,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-08-04 08:31:23,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 08:31:23,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:23,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-08-04 08:31:23,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:24,117 INFO L124 PetriNetUnfolderBase]: 354/713 cut-off events. [2023-08-04 08:31:24,117 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-04 08:31:24,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 713 events. 354/713 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3242 event pairs, 189 based on Foata normal form. 0/616 useless extension candidates. Maximal degree in co-relation 1018. Up to 645 conditions per place. [2023-08-04 08:31:24,120 INFO L140 encePairwiseOnDemand]: 495/498 looper letters, 34 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 08:31:24,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 198 flow [2023-08-04 08:31:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-08-04 08:31:24,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45314591700133866 [2023-08-04 08:31:24,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-08-04 08:31:24,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-08-04 08:31:24,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:24,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-08-04 08:31:24,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 08:31:24,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:24,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:24,126 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 118 flow. Second operand 3 states and 677 transitions. [2023-08-04 08:31:24,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 198 flow [2023-08-04 08:31:24,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:31:24,127 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 110 flow [2023-08-04 08:31:24,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2023-08-04 08:31:24,128 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-08-04 08:31:24,128 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 110 flow [2023-08-04 08:31:24,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 08:31:24,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:24,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:24,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:24,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:24,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:24,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:24,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1547630245, now seen corresponding path program 1 times [2023-08-04 08:31:24,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:24,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415832105] [2023-08-04 08:31:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:24,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:24,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:24,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415832105] [2023-08-04 08:31:24,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415832105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:24,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082747037] [2023-08-04 08:31:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:24,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:24,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:24,416 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) [2023-08-04 08:31:24,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:31:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:24,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:24,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:24,503 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 08:31:24,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082747037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:24,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:24,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:24,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947640268] [2023-08-04 08:31:24,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:24,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:24,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:24,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-08-04 08:31:24,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states 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 08:31:24,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:24,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-08-04 08:31:24,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:24,608 INFO L124 PetriNetUnfolderBase]: 350/709 cut-off events. [2023-08-04 08:31:24,608 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 08:31:24,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 709 events. 350/709 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3049 event pairs, 194 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 838. Up to 621 conditions per place. [2023-08-04 08:31:24,610 INFO L140 encePairwiseOnDemand]: 495/498 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 08:31:24,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 194 flow [2023-08-04 08:31:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2023-08-04 08:31:24,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538152610441767 [2023-08-04 08:31:24,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2023-08-04 08:31:24,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2023-08-04 08:31:24,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:24,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2023-08-04 08:31:24,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 08:31:24,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:24,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:24,616 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 110 flow. Second operand 3 states and 678 transitions. [2023-08-04 08:31:24,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 194 flow [2023-08-04 08:31:24,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:24,617 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 114 flow [2023-08-04 08:31:24,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-04 08:31:24,618 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-04 08:31:24,618 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 114 flow [2023-08-04 08:31:24,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states 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 08:31:24,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:24,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:24,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:24,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:31:24,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:24,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1162274042, now seen corresponding path program 1 times [2023-08-04 08:31:24,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:24,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886338091] [2023-08-04 08:31:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:24,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:24,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:24,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886338091] [2023-08-04 08:31:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886338091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:24,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754738052] [2023-08-04 08:31:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:24,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:24,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:24,893 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) [2023-08-04 08:31:24,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:31:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:24,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:24,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:24,963 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 08:31:24,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:24,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754738052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:24,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:24,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:24,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107323062] [2023-08-04 08:31:24,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:24,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:24,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:24,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:24,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:24,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-08-04 08:31:24,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states 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 08:31:24,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:24,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-08-04 08:31:24,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:25,065 INFO L124 PetriNetUnfolderBase]: 242/513 cut-off events. [2023-08-04 08:31:25,065 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 08:31:25,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 513 events. 242/513 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1981 event pairs, 169 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 650. Up to 417 conditions per place. [2023-08-04 08:31:25,067 INFO L140 encePairwiseOnDemand]: 495/498 looper letters, 40 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 08:31:25,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 220 flow [2023-08-04 08:31:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-04 08:31:25,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564926372155288 [2023-08-04 08:31:25,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-04 08:31:25,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-04 08:31:25,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:25,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-04 08:31:25,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states 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 08:31:25,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:25,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:25,073 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 114 flow. Second operand 3 states and 682 transitions. [2023-08-04 08:31:25,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 220 flow [2023-08-04 08:31:25,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:25,074 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 122 flow [2023-08-04 08:31:25,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-04 08:31:25,075 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-04 08:31:25,075 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 122 flow [2023-08-04 08:31:25,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states 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 08:31:25,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:25,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:25,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:25,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:25,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:25,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1097336012, now seen corresponding path program 1 times [2023-08-04 08:31:25,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:25,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418396702] [2023-08-04 08:31:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:25,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:25,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418396702] [2023-08-04 08:31:25,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418396702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:25,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357787704] [2023-08-04 08:31:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:25,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:25,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:25,370 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) [2023-08-04 08:31:25,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:31:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:25,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:25,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:25,446 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 08:31:25,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:25,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357787704] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:25,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:25,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:25,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659874257] [2023-08-04 08:31:25,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:25,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:25,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:25,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:25,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-08-04 08:31:25,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 08:31:25,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:25,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-08-04 08:31:25,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:25,547 INFO L124 PetriNetUnfolderBase]: 193/432 cut-off events. [2023-08-04 08:31:25,547 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-04 08:31:25,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 432 events. 193/432 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1562 event pairs, 146 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 583. Up to 319 conditions per place. [2023-08-04 08:31:25,549 INFO L140 encePairwiseOnDemand]: 495/498 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 08:31:25,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 230 flow [2023-08-04 08:31:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-04 08:31:25,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564926372155288 [2023-08-04 08:31:25,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-04 08:31:25,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-04 08:31:25,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:25,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-04 08:31:25,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states 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 08:31:25,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:25,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:25,555 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 122 flow. Second operand 3 states and 682 transitions. [2023-08-04 08:31:25,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 230 flow [2023-08-04 08:31:25,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:25,557 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 132 flow [2023-08-04 08:31:25,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-04 08:31:25,559 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-04 08:31:25,559 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 132 flow [2023-08-04 08:31:25,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 08:31:25,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:25,559 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 08:31:25,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:25,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:25,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:25,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1124566039, now seen corresponding path program 1 times [2023-08-04 08:31:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560729562] [2023-08-04 08:31:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:25,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:31:25,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:25,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560729562] [2023-08-04 08:31:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560729562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355076039] [2023-08-04 08:31:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:25,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:25,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:25,828 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) [2023-08-04 08:31:25,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:31:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:25,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:25,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:25,908 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 08:31:25,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:25,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355076039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:25,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:25,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:31:25,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491304915] [2023-08-04 08:31:25,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:25,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:25,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:25,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-08-04 08:31:25,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 08:31:25,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:25,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-08-04 08:31:25,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:26,014 INFO L124 PetriNetUnfolderBase]: 189/424 cut-off events. [2023-08-04 08:31:26,014 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-04 08:31:26,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 424 events. 189/424 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1514 event pairs, 171 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 628. Up to 374 conditions per place. [2023-08-04 08:31:26,015 INFO L140 encePairwiseOnDemand]: 495/498 looper letters, 35 selfloop transitions, 2 changer transitions 3/43 dead transitions. [2023-08-04 08:31:26,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 220 flow [2023-08-04 08:31:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2023-08-04 08:31:26,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538152610441767 [2023-08-04 08:31:26,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2023-08-04 08:31:26,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2023-08-04 08:31:26,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:26,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2023-08-04 08:31:26,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 08:31:26,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:26,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 08:31:26,021 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 132 flow. Second operand 3 states and 678 transitions. [2023-08-04 08:31:26,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 220 flow [2023-08-04 08:31:26,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:26,022 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 130 flow [2023-08-04 08:31:26,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 08:31:26,023 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 08:31:26,023 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 130 flow [2023-08-04 08:31:26,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 08:31:26,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:26,023 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 08:31:26,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:26,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:26,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:26,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1237550067, now seen corresponding path program 1 times [2023-08-04 08:31:26,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:26,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767017618] [2023-08-04 08:31:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:26,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767017618] [2023-08-04 08:31:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767017618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118032151] [2023-08-04 08:31:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:26,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:26,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:26,272 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) [2023-08-04 08:31:26,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:31:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:26,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:26,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:26,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118032151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:26,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:26,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:31:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433652992] [2023-08-04 08:31:26,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:26,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:26,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:26,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 498 [2023-08-04 08:31:26,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 218.6) internal successors, (1093), 5 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states 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 08:31:26,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:26,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 498 [2023-08-04 08:31:26,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:26,413 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:31:26,414 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:26,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 08:31:26,414 INFO L140 encePairwiseOnDemand]: 495/498 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:31:26,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 32 flow [2023-08-04 08:31:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 856 transitions. [2023-08-04 08:31:26,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42971887550200805 [2023-08-04 08:31:26,416 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 856 transitions. [2023-08-04 08:31:26,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 856 transitions. [2023-08-04 08:31:26,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:26,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 856 transitions. [2023-08-04 08:31:26,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 08:31:26,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 498.0) internal successors, (2490), 5 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states 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 08:31:26,419 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 498.0) internal successors, (2490), 5 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states 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 08:31:26,419 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 130 flow. Second operand 4 states and 856 transitions. [2023-08-04 08:31:26,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 32 flow [2023-08-04 08:31:26,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:26,420 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:31:26,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 08:31:26,420 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -21 predicate places. [2023-08-04 08:31:26,420 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:31:26,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.6) internal successors, (1093), 5 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states 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 08:31:26,423 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:31:26,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:26,630 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:26,632 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:31:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:26,684 INFO L124 PetriNetUnfolderBase]: 110/807 cut-off events. [2023-08-04 08:31:26,684 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:31:26,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 807 events. 110/807 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4853 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-04 08:31:26,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:26,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:26,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:26,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:26,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:26,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 08:31:26,735 INFO L124 PetriNetUnfolderBase]: 110/807 cut-off events. [2023-08-04 08:31:26,735 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:31:26,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 807 events. 110/807 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4853 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-04 08:31:26,747 INFO L119 LiptonReduction]: Number of co-enabled transitions 22644 [2023-08-04 08:31:31,525 INFO L134 LiptonReduction]: Checked pairs total: 24714 [2023-08-04 08:31:31,525 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-08-04 08:31:31,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:31:31,530 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;@78d65cb1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:31,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:31:31,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:31,534 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 08:31:31,534 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:31,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:31,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:31:31,534 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 08:31:31,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2070590996, now seen corresponding path program 1 times [2023-08-04 08:31:31,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:31,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109909666] [2023-08-04 08:31:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:31,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:31,549 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:31:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:31,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:31:31,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:31:31,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:31:31,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:31:31,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:31:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:31:31,580 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:31:31,581 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:31:31,581 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:31:31,581 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:31:31,630 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:31:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 08:31:32,253 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 08:31:32,253 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:31:32,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 08:31:32,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 08:31:32,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 357 transitions, 804 flow [2023-08-04 08:31:32,333 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:32,333 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 08:31:32,333 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 08:31:32,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 08:31:32,840 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 08:31:32,840 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:31:32,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 08:31:33,028 INFO L119 LiptonReduction]: Number of co-enabled transitions 70380 [2023-08-04 08:31:39,886 INFO L134 LiptonReduction]: Checked pairs total: 87822 [2023-08-04 08:31:39,886 INFO L136 LiptonReduction]: Total number of compositions: 395 [2023-08-04 08:31:39,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:31:39,888 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;@78d65cb1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:39,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:31:39,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:39,890 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 08:31:39,890 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:31:39,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:39,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:39,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:39,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1502979377, now seen corresponding path program 1 times [2023-08-04 08:31:39,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:39,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335747870] [2023-08-04 08:31:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:39,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:39,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335747870] [2023-08-04 08:31:39,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335747870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:39,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:39,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:31:39,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859490147] [2023-08-04 08:31:39,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:39,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:39,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:39,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:39,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:39,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 752 [2023-08-04 08:31:39,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 08:31:39,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:39,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 752 [2023-08-04 08:31:39,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:42,884 INFO L124 PetriNetUnfolderBase]: 19931/29965 cut-off events. [2023-08-04 08:31:42,884 INFO L125 PetriNetUnfolderBase]: For 7068/7068 co-relation queries the response was YES. [2023-08-04 08:31:42,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62896 conditions, 29965 events. 19931/29965 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 187954 event pairs, 13302 based on Foata normal form. 0/27393 useless extension candidates. Maximal degree in co-relation 25306. Up to 28006 conditions per place. [2023-08-04 08:31:42,987 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 50 selfloop transitions, 2 changer transitions 3/61 dead transitions. [2023-08-04 08:31:42,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 316 flow [2023-08-04 08:31:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2023-08-04 08:31:42,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4348404255319149 [2023-08-04 08:31:42,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2023-08-04 08:31:42,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2023-08-04 08:31:42,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:42,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2023-08-04 08:31:42,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:42,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:42,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:42,995 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 3 states and 981 transitions. [2023-08-04 08:31:42,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 316 flow [2023-08-04 08:31:43,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:31:43,005 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 200 flow [2023-08-04 08:31:43,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-04 08:31:43,006 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 08:31:43,006 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 200 flow [2023-08-04 08:31:43,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 08:31:43,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:43,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:43,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:31:43,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:43,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash 502704022, now seen corresponding path program 1 times [2023-08-04 08:31:43,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:43,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321276241] [2023-08-04 08:31:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321276241] [2023-08-04 08:31:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321276241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049145823] [2023-08-04 08:31:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:43,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:43,035 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) [2023-08-04 08:31:43,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:31:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:43,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:43,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:43,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:43,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049145823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:43,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:43,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995173968] [2023-08-04 08:31:43,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:43,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:43,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 752 [2023-08-04 08:31:43,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states 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 08:31:43,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:43,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 752 [2023-08-04 08:31:43,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:46,198 INFO L124 PetriNetUnfolderBase]: 19717/29517 cut-off events. [2023-08-04 08:31:46,199 INFO L125 PetriNetUnfolderBase]: For 6545/6545 co-relation queries the response was YES. [2023-08-04 08:31:46,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61935 conditions, 29517 events. 19717/29517 cut-off events. For 6545/6545 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 183973 event pairs, 13229 based on Foata normal form. 0/27023 useless extension candidates. Maximal degree in co-relation 61905. Up to 27632 conditions per place. [2023-08-04 08:31:46,294 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 53 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 08:31:46,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 320 flow [2023-08-04 08:31:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 982 transitions. [2023-08-04 08:31:46,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4352836879432624 [2023-08-04 08:31:46,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 982 transitions. [2023-08-04 08:31:46,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 982 transitions. [2023-08-04 08:31:46,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:46,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 982 transitions. [2023-08-04 08:31:46,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 08:31:46,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:46,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:46,301 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 200 flow. Second operand 3 states and 982 transitions. [2023-08-04 08:31:46,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 320 flow [2023-08-04 08:31:46,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 306 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:31:46,314 INFO L231 Difference]: Finished difference. Result has 52 places, 57 transitions, 198 flow [2023-08-04 08:31:46,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=57} [2023-08-04 08:31:46,315 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-04 08:31:46,315 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 57 transitions, 198 flow [2023-08-04 08:31:46,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states 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 08:31:46,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:46,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:46,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 08:31:46,522 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 [2023-08-04 08:31:46,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:46,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1835089180, now seen corresponding path program 1 times [2023-08-04 08:31:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:46,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561512272] [2023-08-04 08:31:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:46,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561512272] [2023-08-04 08:31:46,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561512272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667573116] [2023-08-04 08:31:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:46,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:46,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:46,548 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) [2023-08-04 08:31:46,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:31:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:46,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:46,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:46,618 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 08:31:46,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:46,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667573116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:46,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:46,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:46,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255982334] [2023-08-04 08:31:46,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:46,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:46,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:46,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:46,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 752 [2023-08-04 08:31:46,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 57 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 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) [2023-08-04 08:31:46,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:46,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 752 [2023-08-04 08:31:46,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:49,866 INFO L124 PetriNetUnfolderBase]: 19681/29763 cut-off events. [2023-08-04 08:31:49,867 INFO L125 PetriNetUnfolderBase]: For 2634/2634 co-relation queries the response was YES. [2023-08-04 08:31:49,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62148 conditions, 29763 events. 19681/29763 cut-off events. For 2634/2634 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 188827 event pairs, 13174 based on Foata normal form. 0/27353 useless extension candidates. Maximal degree in co-relation 27274. Up to 27256 conditions per place. [2023-08-04 08:31:49,959 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 56 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 08:31:49,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 328 flow [2023-08-04 08:31:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2023-08-04 08:31:49,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43617021276595747 [2023-08-04 08:31:49,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2023-08-04 08:31:49,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2023-08-04 08:31:49,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:49,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2023-08-04 08:31:49,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 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) [2023-08-04 08:31:49,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:49,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:49,967 INFO L175 Difference]: Start difference. First operand has 52 places, 57 transitions, 198 flow. Second operand 3 states and 984 transitions. [2023-08-04 08:31:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 328 flow [2023-08-04 08:31:49,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:49,969 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 208 flow [2023-08-04 08:31:49,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-08-04 08:31:49,970 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-04 08:31:49,970 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 208 flow [2023-08-04 08:31:49,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 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) [2023-08-04 08:31:49,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:49,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:49,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 08:31:50,174 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 [2023-08-04 08:31:50,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:50,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash 70608008, now seen corresponding path program 1 times [2023-08-04 08:31:50,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:50,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972633031] [2023-08-04 08:31:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:50,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972633031] [2023-08-04 08:31:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972633031] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119358069] [2023-08-04 08:31:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:50,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:50,207 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) [2023-08-04 08:31:50,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:31:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:50,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:50,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:50,301 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 08:31:50,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:50,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119358069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:50,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155933131] [2023-08-04 08:31:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:50,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:50,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:50,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 752 [2023-08-04 08:31:50,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 08:31:50,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:50,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 752 [2023-08-04 08:31:50,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:53,094 INFO L124 PetriNetUnfolderBase]: 18785/28651 cut-off events. [2023-08-04 08:31:53,095 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 08:31:53,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60517 conditions, 28651 events. 18785/28651 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 183926 event pairs, 13063 based on Foata normal form. 0/26649 useless extension candidates. Maximal degree in co-relation 28822. Up to 23580 conditions per place. [2023-08-04 08:31:53,245 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 08:31:53,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 383 flow [2023-08-04 08:31:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-08-04 08:31:53,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43927304964539005 [2023-08-04 08:31:53,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-08-04 08:31:53,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-08-04 08:31:53,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:53,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-08-04 08:31:53,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 08:31:53,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:53,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:53,252 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 208 flow. Second operand 3 states and 991 transitions. [2023-08-04 08:31:53,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 383 flow [2023-08-04 08:31:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:53,257 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 218 flow [2023-08-04 08:31:53,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2023-08-04 08:31:53,257 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 08:31:53,257 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 218 flow [2023-08-04 08:31:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 08:31:53,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:53,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:53,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:53,462 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 [2023-08-04 08:31:53,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:53,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:53,463 INFO L85 PathProgramCache]: Analyzing trace with hash 807792360, now seen corresponding path program 1 times [2023-08-04 08:31:53,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:53,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562560411] [2023-08-04 08:31:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:53,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:53,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:53,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562560411] [2023-08-04 08:31:53,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562560411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:53,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624678540] [2023-08-04 08:31:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:53,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:53,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:53,501 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) [2023-08-04 08:31:53,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:31:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:53,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:53,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:53,582 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 08:31:53,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:53,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624678540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:53,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:53,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:53,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492946956] [2023-08-04 08:31:53,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:53,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:53,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 752 [2023-08-04 08:31:53,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:53,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:53,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 752 [2023-08-04 08:31:53,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:56,172 INFO L124 PetriNetUnfolderBase]: 18576/28798 cut-off events. [2023-08-04 08:31:56,172 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 08:31:56,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63359 conditions, 28798 events. 18576/28798 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 186611 event pairs, 12252 based on Foata normal form. 0/27845 useless extension candidates. Maximal degree in co-relation 32424. Up to 20868 conditions per place. [2023-08-04 08:31:56,272 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:31:56,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 395 flow [2023-08-04 08:31:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-08-04 08:31:56,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43927304964539005 [2023-08-04 08:31:56,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-08-04 08:31:56,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-08-04 08:31:56,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:56,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-08-04 08:31:56,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 08:31:56,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:56,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:56,279 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 218 flow. Second operand 3 states and 991 transitions. [2023-08-04 08:31:56,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 395 flow [2023-08-04 08:31:56,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:56,291 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 228 flow [2023-08-04 08:31:56,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-04 08:31:56,292 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-04 08:31:56,292 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 228 flow [2023-08-04 08:31:56,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:56,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:56,293 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 08:31:56,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 08:31:56,496 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 [2023-08-04 08:31:56,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:56,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:56,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1618111785, now seen corresponding path program 1 times [2023-08-04 08:31:56,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:56,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843524920] [2023-08-04 08:31:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:56,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:31:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:56,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843524920] [2023-08-04 08:31:56,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843524920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:56,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820250470] [2023-08-04 08:31:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:56,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:56,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:56,537 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) [2023-08-04 08:31:56,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:31:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:56,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:56,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:56,620 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 08:31:56,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820250470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:56,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:56,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:31:56,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161130186] [2023-08-04 08:31:56,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:56,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:56,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:56,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 752 [2023-08-04 08:31:56,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 08:31:56,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:56,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 752 [2023-08-04 08:31:56,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:59,805 INFO L124 PetriNetUnfolderBase]: 18847/29441 cut-off events. [2023-08-04 08:31:59,806 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 08:31:59,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66720 conditions, 29441 events. 18847/29441 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 191013 event pairs, 14123 based on Foata normal form. 0/29201 useless extension candidates. Maximal degree in co-relation 35088. Up to 23742 conditions per place. [2023-08-04 08:31:59,943 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 08:31:59,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 407 flow [2023-08-04 08:31:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-08-04 08:31:59,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43927304964539005 [2023-08-04 08:31:59,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-08-04 08:31:59,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-08-04 08:31:59,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:59,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-08-04 08:31:59,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 08:31:59,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:59,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 08:31:59,951 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 228 flow. Second operand 3 states and 991 transitions. [2023-08-04 08:31:59,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 407 flow [2023-08-04 08:32:00,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:00,120 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 238 flow [2023-08-04 08:32:00,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-04 08:32:00,121 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2023-08-04 08:32:00,121 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 238 flow [2023-08-04 08:32:00,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 08:32:00,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:00,121 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 08:32:00,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:00,326 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 [2023-08-04 08:32:00,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:00,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash -396426863, now seen corresponding path program 1 times [2023-08-04 08:32:00,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:00,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307845271] [2023-08-04 08:32:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:32:00,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:00,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307845271] [2023-08-04 08:32:00,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307845271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83380205] [2023-08-04 08:32:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:00,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:00,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:00,371 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) [2023-08-04 08:32:00,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:32:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:00,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:00,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:32:00,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:32:00,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83380205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:00,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:00,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:32:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491794498] [2023-08-04 08:32:00,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:00,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:00,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:00,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 752 [2023-08-04 08:32:00,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 08:32:00,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:00,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 752 [2023-08-04 08:32:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:03,100 INFO L124 PetriNetUnfolderBase]: 17691/27603 cut-off events. [2023-08-04 08:32:03,100 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 08:32:03,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63363 conditions, 27603 events. 17691/27603 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 179963 event pairs, 10191 based on Foata normal form. 2/27600 useless extension candidates. Maximal degree in co-relation 48888. Up to 25640 conditions per place. [2023-08-04 08:32:03,219 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 56 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 08:32:03,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 368 flow [2023-08-04 08:32:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1288 transitions. [2023-08-04 08:32:03,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42819148936170215 [2023-08-04 08:32:03,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1288 transitions. [2023-08-04 08:32:03,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1288 transitions. [2023-08-04 08:32:03,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:03,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1288 transitions. [2023-08-04 08:32:03,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states 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 08:32:03,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:03,226 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:03,226 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 238 flow. Second operand 4 states and 1288 transitions. [2023-08-04 08:32:03,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 368 flow [2023-08-04 08:32:03,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:03,461 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 250 flow [2023-08-04 08:32:03,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-04 08:32:03,461 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-04 08:32:03,461 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 250 flow [2023-08-04 08:32:03,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 08:32:03,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:03,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:03,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:32:03,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:03,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash -66575522, now seen corresponding path program 1 times [2023-08-04 08:32:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:03,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484465775] [2023-08-04 08:32:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:03,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:32:03,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:03,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484465775] [2023-08-04 08:32:03,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484465775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:03,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560596982] [2023-08-04 08:32:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:03,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:03,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:03,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:32:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:03,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:03,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:32:03,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:32:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560596982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:03,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:03,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295130443] [2023-08-04 08:32:03,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:03,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:03,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 752 [2023-08-04 08:32:03,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 08:32:03,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:03,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 752 [2023-08-04 08:32:03,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:06,162 INFO L124 PetriNetUnfolderBase]: 16839/26275 cut-off events. [2023-08-04 08:32:06,162 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 08:32:06,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60198 conditions, 26275 events. 16839/26275 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 171176 event pairs, 9864 based on Foata normal form. 8/26278 useless extension candidates. Maximal degree in co-relation 45955. Up to 24296 conditions per place. [2023-08-04 08:32:06,273 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 08:32:06,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 396 flow [2023-08-04 08:32:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1292 transitions. [2023-08-04 08:32:06,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295212765957447 [2023-08-04 08:32:06,276 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1292 transitions. [2023-08-04 08:32:06,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1292 transitions. [2023-08-04 08:32:06,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:06,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1292 transitions. [2023-08-04 08:32:06,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 08:32:06,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:06,280 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:06,280 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 250 flow. Second operand 4 states and 1292 transitions. [2023-08-04 08:32:06,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 396 flow [2023-08-04 08:32:06,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 386 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:32:06,423 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 254 flow [2023-08-04 08:32:06,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-04 08:32:06,423 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-04 08:32:06,423 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 254 flow [2023-08-04 08:32:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 08:32:06,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:06,424 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] [2023-08-04 08:32:06,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:06,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:32:06,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:06,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1168556937, now seen corresponding path program 1 times [2023-08-04 08:32:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:06,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857038525] [2023-08-04 08:32:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:06,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:32:06,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:06,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857038525] [2023-08-04 08:32:06,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857038525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385125533] [2023-08-04 08:32:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:06,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:06,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:06,685 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:06,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:32:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:06,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:06,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:32:06,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:32:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385125533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:06,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:06,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686906115] [2023-08-04 08:32:06,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:06,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:06,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:06,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:06,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 752 [2023-08-04 08:32:06,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 314.8) internal successors, (1574), 5 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states 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 08:32:06,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:06,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 752 [2023-08-04 08:32:06,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:09,431 INFO L124 PetriNetUnfolderBase]: 16407/25603 cut-off events. [2023-08-04 08:32:09,431 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 08:32:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58010 conditions, 25603 events. 16407/25603 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 165213 event pairs, 9523 based on Foata normal form. 32/25630 useless extension candidates. Maximal degree in co-relation 43949. Up to 22968 conditions per place. [2023-08-04 08:32:09,539 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 64 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 08:32:09,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 416 flow [2023-08-04 08:32:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1296 transitions. [2023-08-04 08:32:09,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308510638297872 [2023-08-04 08:32:09,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1296 transitions. [2023-08-04 08:32:09,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1296 transitions. [2023-08-04 08:32:09,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:09,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1296 transitions. [2023-08-04 08:32:09,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 08:32:09,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:09,549 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:09,549 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 254 flow. Second operand 4 states and 1296 transitions. [2023-08-04 08:32:09,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 416 flow [2023-08-04 08:32:09,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 406 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:32:09,701 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 258 flow [2023-08-04 08:32:09,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-04 08:32:09,702 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-04 08:32:09,702 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 258 flow [2023-08-04 08:32:09,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.8) internal successors, (1574), 5 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states 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 08:32:09,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:09,702 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] [2023-08-04 08:32:09,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 08:32:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:09,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:09,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash -507522870, now seen corresponding path program 1 times [2023-08-04 08:32:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193709679] [2023-08-04 08:32:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:32:09,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193709679] [2023-08-04 08:32:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193709679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:09,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863656489] [2023-08-04 08:32:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:09,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:09,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:09,971 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:10,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:32:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:10,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:10,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:32:10,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:32:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863656489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:10,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:10,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:10,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763766914] [2023-08-04 08:32:10,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:10,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:10,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:10,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 752 [2023-08-04 08:32:10,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 08:32:10,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:10,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 752 [2023-08-04 08:32:10,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:11,766 INFO L124 PetriNetUnfolderBase]: 10315/16383 cut-off events. [2023-08-04 08:32:11,766 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 08:32:11,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36927 conditions, 16383 events. 10315/16383 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 98866 event pairs, 5374 based on Foata normal form. 192/16570 useless extension candidates. Maximal degree in co-relation 32048. Up to 9425 conditions per place. [2023-08-04 08:32:11,832 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 71 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 08:32:11,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 461 flow [2023-08-04 08:32:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1303 transitions. [2023-08-04 08:32:11,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331781914893617 [2023-08-04 08:32:11,834 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1303 transitions. [2023-08-04 08:32:11,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1303 transitions. [2023-08-04 08:32:11,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:11,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1303 transitions. [2023-08-04 08:32:11,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.75) internal successors, (1303), 4 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 08:32:11,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:11,839 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:11,839 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 258 flow. Second operand 4 states and 1303 transitions. [2023-08-04 08:32:11,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 461 flow [2023-08-04 08:32:11,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:32:11,910 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 268 flow [2023-08-04 08:32:11,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-04 08:32:11,910 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2023-08-04 08:32:11,910 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 268 flow [2023-08-04 08:32:11,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 08:32:11,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:11,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:11,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:12,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:32:12,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:12,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1807031428, now seen corresponding path program 1 times [2023-08-04 08:32:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:12,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307614128] [2023-08-04 08:32:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:32:12,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307614128] [2023-08-04 08:32:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307614128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306539114] [2023-08-04 08:32:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:12,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:12,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:12,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:32:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:12,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:12,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:32:12,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:32:12,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306539114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:12,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:12,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:12,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130015330] [2023-08-04 08:32:12,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:12,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:12,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:12,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 752 [2023-08-04 08:32:12,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states 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 08:32:12,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:12,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 752 [2023-08-04 08:32:12,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:13,803 INFO L124 PetriNetUnfolderBase]: 9415/14912 cut-off events. [2023-08-04 08:32:13,803 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 08:32:13,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35765 conditions, 14912 events. 9415/14912 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 88010 event pairs, 5942 based on Foata normal form. 233/15140 useless extension candidates. Maximal degree in co-relation 34698. Up to 8732 conditions per place. [2023-08-04 08:32:13,870 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-04 08:32:13,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 472 flow [2023-08-04 08:32:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1303 transitions. [2023-08-04 08:32:13,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331781914893617 [2023-08-04 08:32:13,873 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1303 transitions. [2023-08-04 08:32:13,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1303 transitions. [2023-08-04 08:32:13,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:13,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1303 transitions. [2023-08-04 08:32:13,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.75) internal successors, (1303), 4 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 08:32:13,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:13,877 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:13,877 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 268 flow. Second operand 4 states and 1303 transitions. [2023-08-04 08:32:13,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 472 flow [2023-08-04 08:32:13,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 468 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:13,940 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 284 flow [2023-08-04 08:32:13,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-08-04 08:32:13,940 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2023-08-04 08:32:13,940 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 284 flow [2023-08-04 08:32:13,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states 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 08:32:13,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:13,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:13,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:14,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:14,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash -460885815, now seen corresponding path program 1 times [2023-08-04 08:32:14,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:14,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664132896] [2023-08-04 08:32:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664132896] [2023-08-04 08:32:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664132896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323412805] [2023-08-04 08:32:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:14,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:14,213 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:14,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:32:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:14,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:14,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:14,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:14,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323412805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:14,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:14,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:32:14,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554853789] [2023-08-04 08:32:14,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:14,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:14,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:14,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:14,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:14,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 752 [2023-08-04 08:32:14,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 08:32:14,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:14,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 752 [2023-08-04 08:32:14,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:15,919 INFO L124 PetriNetUnfolderBase]: 9409/14895 cut-off events. [2023-08-04 08:32:15,919 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 08:32:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37434 conditions, 14895 events. 9409/14895 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87873 event pairs, 8414 based on Foata normal form. 13/14903 useless extension candidates. Maximal degree in co-relation 36338. Up to 13453 conditions per place. [2023-08-04 08:32:15,995 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 71 selfloop transitions, 3 changer transitions 3/83 dead transitions. [2023-08-04 08:32:15,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 490 flow [2023-08-04 08:32:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1303 transitions. [2023-08-04 08:32:15,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331781914893617 [2023-08-04 08:32:15,998 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1303 transitions. [2023-08-04 08:32:15,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1303 transitions. [2023-08-04 08:32:15,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:15,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1303 transitions. [2023-08-04 08:32:16,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.75) internal successors, (1303), 4 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 08:32:16,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:16,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states 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 08:32:16,004 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 284 flow. Second operand 4 states and 1303 transitions. [2023-08-04 08:32:16,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 490 flow [2023-08-04 08:32:16,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 486 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:16,176 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 282 flow [2023-08-04 08:32:16,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-08-04 08:32:16,177 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-08-04 08:32:16,177 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 282 flow [2023-08-04 08:32:16,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 08:32:16,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:16,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:16,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-04 08:32:16,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:16,378 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:16,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1967485961, now seen corresponding path program 1 times [2023-08-04 08:32:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:16,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289583004] [2023-08-04 08:32:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:16,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:32:17,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:17,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289583004] [2023-08-04 08:32:17,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289583004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:17,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854280363] [2023-08-04 08:32:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:17,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:17,112 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:17,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:32:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:17,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:32:17,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:19,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:20,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854280363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:20,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:20,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-04 08:32:20,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600510363] [2023-08-04 08:32:20,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:20,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 08:32:20,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 08:32:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-04 08:32:20,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 752 [2023-08-04 08:32:20,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 282 flow. Second operand has 12 states, 12 states have (on average 284.3333333333333) internal successors, (3412), 12 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states 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 08:32:20,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:20,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 752 [2023-08-04 08:32:20,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:23,712 INFO L124 PetriNetUnfolderBase]: 14536/22742 cut-off events. [2023-08-04 08:32:23,712 INFO L125 PetriNetUnfolderBase]: For 15187/15187 co-relation queries the response was YES. [2023-08-04 08:32:23,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56249 conditions, 22742 events. 14536/22742 cut-off events. For 15187/15187 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 148247 event pairs, 2469 based on Foata normal form. 1/22619 useless extension candidates. Maximal degree in co-relation 55834. Up to 7483 conditions per place. [2023-08-04 08:32:23,796 INFO L140 encePairwiseOnDemand]: 744/752 looper letters, 220 selfloop transitions, 25 changer transitions 1/252 dead transitions. [2023-08-04 08:32:23,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 252 transitions, 1676 flow [2023-08-04 08:32:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:32:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:32:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2704 transitions. [2023-08-04 08:32:23,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39952718676122934 [2023-08-04 08:32:23,801 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2704 transitions. [2023-08-04 08:32:23,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2704 transitions. [2023-08-04 08:32:23,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:23,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2704 transitions. [2023-08-04 08:32:23,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 300.44444444444446) internal successors, (2704), 9 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states 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 08:32:23,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 752.0) internal successors, (7520), 10 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 08:32:23,809 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 752.0) internal successors, (7520), 10 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 08:32:23,809 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 282 flow. Second operand 9 states and 2704 transitions. [2023-08-04 08:32:23,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 252 transitions, 1676 flow [2023-08-04 08:32:23,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 252 transitions, 1630 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-04 08:32:23,988 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 443 flow [2023-08-04 08:32:23,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=443, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2023-08-04 08:32:23,989 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2023-08-04 08:32:23,989 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 443 flow [2023-08-04 08:32:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 284.3333333333333) internal successors, (3412), 12 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states 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 08:32:23,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:23,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:23,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:24,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:24,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:24,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2052834823, now seen corresponding path program 1 times [2023-08-04 08:32:24,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:24,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155975792] [2023-08-04 08:32:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:24,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:32:24,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155975792] [2023-08-04 08:32:24,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155975792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061049399] [2023-08-04 08:32:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:24,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:24,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:24,727 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:24,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:32:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:24,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 08:32:24,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 08:32:27,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 08:32:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061049399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:27,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:27,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2023-08-04 08:32:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272626482] [2023-08-04 08:32:27,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:27,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:32:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:32:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:32:28,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 752 [2023-08-04 08:32:28,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 443 flow. Second operand has 13 states, 13 states have (on average 284.15384615384613) internal successors, (3694), 13 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states 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 08:32:28,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:28,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 752 [2023-08-04 08:32:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:33,572 INFO L124 PetriNetUnfolderBase]: 23272/37319 cut-off events. [2023-08-04 08:32:33,573 INFO L125 PetriNetUnfolderBase]: For 62471/62471 co-relation queries the response was YES. [2023-08-04 08:32:33,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122115 conditions, 37319 events. 23272/37319 cut-off events. For 62471/62471 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 272686 event pairs, 2876 based on Foata normal form. 1/37172 useless extension candidates. Maximal degree in co-relation 121230. Up to 12062 conditions per place. [2023-08-04 08:32:33,767 INFO L140 encePairwiseOnDemand]: 744/752 looper letters, 158 selfloop transitions, 19 changer transitions 94/277 dead transitions. [2023-08-04 08:32:33,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 277 transitions, 1929 flow [2023-08-04 08:32:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:32:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:32:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2715 transitions. [2023-08-04 08:32:33,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40115248226950356 [2023-08-04 08:32:33,772 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2715 transitions. [2023-08-04 08:32:33,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2715 transitions. [2023-08-04 08:32:33,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:33,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2715 transitions. [2023-08-04 08:32:33,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 301.6666666666667) internal successors, (2715), 9 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states 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 08:32:33,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 752.0) internal successors, (7520), 10 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 08:32:33,779 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 752.0) internal successors, (7520), 10 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 08:32:33,779 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 443 flow. Second operand 9 states and 2715 transitions. [2023-08-04 08:32:33,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 277 transitions, 1929 flow [2023-08-04 08:32:34,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 277 transitions, 1928 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:34,588 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 474 flow [2023-08-04 08:32:34,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=474, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2023-08-04 08:32:34,589 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2023-08-04 08:32:34,589 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 474 flow [2023-08-04 08:32:34,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 284.15384615384613) internal successors, (3694), 13 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states 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 08:32:34,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:34,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:34,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:34,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:34,790 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:34,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2140300337, now seen corresponding path program 1 times [2023-08-04 08:32:34,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:34,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133834574] [2023-08-04 08:32:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:34,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133834574] [2023-08-04 08:32:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133834574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640812705] [2023-08-04 08:32:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:35,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:35,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:35,587 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:35,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 08:32:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:35,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 08:32:35,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:37,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:37,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640812705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:37,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:37,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 10 [2023-08-04 08:32:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627186384] [2023-08-04 08:32:37,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:32:37,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:32:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:32:38,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 752 [2023-08-04 08:32:38,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 474 flow. Second operand has 11 states, 11 states have (on average 286.72727272727275) internal successors, (3154), 11 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states 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 08:32:38,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:38,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 752 [2023-08-04 08:32:38,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:42,370 INFO L124 PetriNetUnfolderBase]: 14128/25316 cut-off events. [2023-08-04 08:32:42,371 INFO L125 PetriNetUnfolderBase]: For 67496/67496 co-relation queries the response was YES. [2023-08-04 08:32:42,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88461 conditions, 25316 events. 14128/25316 cut-off events. For 67496/67496 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 203732 event pairs, 2558 based on Foata normal form. 1/25235 useless extension candidates. Maximal degree in co-relation 88412. Up to 12117 conditions per place. [2023-08-04 08:32:42,476 INFO L140 encePairwiseOnDemand]: 744/752 looper letters, 186 selfloop transitions, 21 changer transitions 32/245 dead transitions. [2023-08-04 08:32:42,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 245 transitions, 1805 flow [2023-08-04 08:32:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:32:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:32:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2720 transitions. [2023-08-04 08:32:42,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40189125295508277 [2023-08-04 08:32:42,482 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2720 transitions. [2023-08-04 08:32:42,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2720 transitions. [2023-08-04 08:32:42,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:42,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2720 transitions. [2023-08-04 08:32:42,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 302.22222222222223) internal successors, (2720), 9 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states 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 08:32:42,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 752.0) internal successors, (7520), 10 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 08:32:42,491 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 752.0) internal successors, (7520), 10 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 08:32:42,491 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 474 flow. Second operand 9 states and 2720 transitions. [2023-08-04 08:32:42,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 245 transitions, 1805 flow [2023-08-04 08:32:42,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 245 transitions, 1737 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-08-04 08:32:42,915 INFO L231 Difference]: Finished difference. Result has 100 places, 91 transitions, 554 flow [2023-08-04 08:32:42,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=554, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2023-08-04 08:32:42,916 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2023-08-04 08:32:42,916 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 554 flow [2023-08-04 08:32:42,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 286.72727272727275) internal successors, (3154), 11 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states 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 08:32:42,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:42,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:42,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:43,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-04 08:32:43,117 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:43,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:43,117 INFO L85 PathProgramCache]: Analyzing trace with hash 122303511, now seen corresponding path program 1 times [2023-08-04 08:32:43,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:43,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472579429] [2023-08-04 08:32:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:43,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 08:32:43,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:43,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472579429] [2023-08-04 08:32:43,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472579429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:32:43,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:32:43,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:32:43,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168633970] [2023-08-04 08:32:43,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:32:43,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:43,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:43,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 752 [2023-08-04 08:32:43,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 554 flow. Second operand has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states 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 08:32:43,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:43,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 752 [2023-08-04 08:32:43,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:47,438 INFO L124 PetriNetUnfolderBase]: 17060/30396 cut-off events. [2023-08-04 08:32:47,438 INFO L125 PetriNetUnfolderBase]: For 113063/113063 co-relation queries the response was YES. [2023-08-04 08:32:47,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119941 conditions, 30396 events. 17060/30396 cut-off events. For 113063/113063 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 254917 event pairs, 2464 based on Foata normal form. 2/30253 useless extension candidates. Maximal degree in co-relation 119878. Up to 12713 conditions per place. [2023-08-04 08:32:47,615 INFO L140 encePairwiseOnDemand]: 744/752 looper letters, 169 selfloop transitions, 29 changer transitions 12/216 dead transitions. [2023-08-04 08:32:47,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 216 transitions, 1666 flow [2023-08-04 08:32:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:32:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:32:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1872 transitions. [2023-08-04 08:32:47,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148936170212766 [2023-08-04 08:32:47,621 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1872 transitions. [2023-08-04 08:32:47,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1872 transitions. [2023-08-04 08:32:47,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:47,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1872 transitions. [2023-08-04 08:32:47,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 08:32:47,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 752.0) internal successors, (5264), 7 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states 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 08:32:47,626 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 752.0) internal successors, (5264), 7 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states 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 08:32:47,626 INFO L175 Difference]: Start difference. First operand has 100 places, 91 transitions, 554 flow. Second operand 6 states and 1872 transitions. [2023-08-04 08:32:47,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 216 transitions, 1666 flow [2023-08-04 08:32:49,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 216 transitions, 1634 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-04 08:32:49,325 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 724 flow [2023-08-04 08:32:49,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2023-08-04 08:32:49,325 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2023-08-04 08:32:49,325 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 724 flow [2023-08-04 08:32:49,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states 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 08:32:49,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:49,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:49,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 08:32:49,326 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:49,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1644716403, now seen corresponding path program 1 times [2023-08-04 08:32:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:49,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784055656] [2023-08-04 08:32:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:49,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784055656] [2023-08-04 08:32:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784055656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553358376] [2023-08-04 08:32:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:49,817 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:49,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 08:32:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:49,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:32:49,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:51,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:51,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553358376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:51,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:51,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 08:32:51,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484127507] [2023-08-04 08:32:51,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:51,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:32:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:51,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:32:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:32:52,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 752 [2023-08-04 08:32:52,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 724 flow. Second operand has 11 states, 11 states have (on average 287.3636363636364) internal successors, (3161), 11 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states 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 08:32:52,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:52,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 752 [2023-08-04 08:32:52,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:57,017 INFO L124 PetriNetUnfolderBase]: 18338/34171 cut-off events. [2023-08-04 08:32:57,017 INFO L125 PetriNetUnfolderBase]: For 172312/172312 co-relation queries the response was YES. [2023-08-04 08:32:57,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142140 conditions, 34171 events. 18338/34171 cut-off events. For 172312/172312 co-relation queries the response was YES. Maximal size of possible extension queue 1182. Compared 305276 event pairs, 4204 based on Foata normal form. 3/34041 useless extension candidates. Maximal degree in co-relation 142076. Up to 13672 conditions per place. [2023-08-04 08:32:57,138 INFO L140 encePairwiseOnDemand]: 744/752 looper letters, 98 selfloop transitions, 9 changer transitions 114/227 dead transitions. [2023-08-04 08:32:57,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 227 transitions, 1859 flow [2023-08-04 08:32:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:32:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:32:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2415 transitions. [2023-08-04 08:32:57,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40142952127659576 [2023-08-04 08:32:57,141 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2415 transitions. [2023-08-04 08:32:57,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2415 transitions. [2023-08-04 08:32:57,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:57,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2415 transitions. [2023-08-04 08:32:57,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 301.875) internal successors, (2415), 8 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states 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 08:32:57,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 752.0) internal successors, (6768), 9 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states 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 08:32:57,148 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 752.0) internal successors, (6768), 9 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states 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 08:32:57,148 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 724 flow. Second operand 8 states and 2415 transitions. [2023-08-04 08:32:57,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 227 transitions, 1859 flow [2023-08-04 08:32:58,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 227 transitions, 1822 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-04 08:32:58,681 INFO L231 Difference]: Finished difference. Result has 109 places, 77 transitions, 487 flow [2023-08-04 08:32:58,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=487, PETRI_PLACES=109, PETRI_TRANSITIONS=77} [2023-08-04 08:32:58,681 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2023-08-04 08:32:58,681 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 77 transitions, 487 flow [2023-08-04 08:32:58,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 287.3636363636364) internal successors, (3161), 11 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states 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 08:32:58,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:58,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:58,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 08:32:58,882 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:58,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash -739734403, now seen corresponding path program 1 times [2023-08-04 08:32:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:58,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200928324] [2023-08-04 08:32:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:58,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:32:59,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:59,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200928324] [2023-08-04 08:32:59,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200928324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:32:59,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:32:59,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 08:32:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774864714] [2023-08-04 08:32:59,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:32:59,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 08:32:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 08:32:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:32:59,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 752 [2023-08-04 08:32:59,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 77 transitions, 487 flow. Second operand has 6 states, 6 states have (on average 286.3333333333333) internal successors, (1718), 6 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states 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 08:32:59,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:59,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 752 [2023-08-04 08:32:59,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:01,171 INFO L124 PetriNetUnfolderBase]: 6327/12169 cut-off events. [2023-08-04 08:33:01,171 INFO L125 PetriNetUnfolderBase]: For 47011/47011 co-relation queries the response was YES. [2023-08-04 08:33:01,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46726 conditions, 12169 events. 6327/12169 cut-off events. For 47011/47011 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 97352 event pairs, 684 based on Foata normal form. 2/12102 useless extension candidates. Maximal degree in co-relation 46695. Up to 6492 conditions per place. [2023-08-04 08:33:01,212 INFO L140 encePairwiseOnDemand]: 744/752 looper letters, 0 selfloop transitions, 0 changer transitions 135/135 dead transitions. [2023-08-04 08:33:01,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 1025 flow [2023-08-04 08:33:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:33:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:33:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1791 transitions. [2023-08-04 08:33:01,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39694148936170215 [2023-08-04 08:33:01,215 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1791 transitions. [2023-08-04 08:33:01,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1791 transitions. [2023-08-04 08:33:01,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:01,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1791 transitions. [2023-08-04 08:33:01,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 298.5) internal successors, (1791), 6 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states 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 08:33:01,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 752.0) internal successors, (5264), 7 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states 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 08:33:01,219 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 752.0) internal successors, (5264), 7 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states 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 08:33:01,219 INFO L175 Difference]: Start difference. First operand has 109 places, 77 transitions, 487 flow. Second operand 6 states and 1791 transitions. [2023-08-04 08:33:01,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 1025 flow [2023-08-04 08:33:01,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 135 transitions, 948 flow, removed 6 selfloop flow, removed 15 redundant places. [2023-08-04 08:33:01,562 INFO L231 Difference]: Finished difference. Result has 93 places, 0 transitions, 0 flow [2023-08-04 08:33:01,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=93, PETRI_TRANSITIONS=0} [2023-08-04 08:33:01,562 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 39 predicate places. [2023-08-04 08:33:01,562 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 0 transitions, 0 flow [2023-08-04 08:33:01,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.3333333333333) internal successors, (1718), 6 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states 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 08:33:01,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:33:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 08:33:01,563 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:01,563 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:33:01,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 08:33:02,030 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 08:33:02,030 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:33:02,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 08:33:02,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 08:33:02,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 357 transitions, 804 flow [2023-08-04 08:33:02,111 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:33:02,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 08:33:02,112 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 08:33:02,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 08:33:02,617 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 08:33:02,617 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:33:02,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 08:33:02,839 INFO L119 LiptonReduction]: Number of co-enabled transitions 70380 [2023-08-04 08:33:09,268 INFO L134 LiptonReduction]: Checked pairs total: 88837 [2023-08-04 08:33:09,268 INFO L136 LiptonReduction]: Total number of compositions: 397 [2023-08-04 08:33:09,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:33:09,270 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;@78d65cb1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:33:09,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:33:09,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:33:09,276 INFO L124 PetriNetUnfolderBase]: 6/98 cut-off events. [2023-08-04 08:33:09,276 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 08:33:09,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:09,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:33:09,277 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 08:33:09,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:09,277 INFO L85 PathProgramCache]: Analyzing trace with hash -616983619, now seen corresponding path program 1 times [2023-08-04 08:33:09,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:09,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847057257] [2023-08-04 08:33:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:09,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:33:09,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:09,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847057257] [2023-08-04 08:33:09,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847057257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:09,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62051686] [2023-08-04 08:33:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:09,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:09,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:09,321 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:09,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 08:33:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:09,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:33:09,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:33:09,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:09,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62051686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:09,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:09,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:33:09,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089279166] [2023-08-04 08:33:09,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:09,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:09,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:33:09,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 754 [2023-08-04 08:33:09,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 309.6) internal successors, (1548), 5 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states 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 08:33:09,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:09,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 754 [2023-08-04 08:33:09,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:12,135 INFO L124 PetriNetUnfolderBase]: 20172/30670 cut-off events. [2023-08-04 08:33:12,135 INFO L125 PetriNetUnfolderBase]: For 6363/6363 co-relation queries the response was YES. [2023-08-04 08:33:12,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64138 conditions, 30670 events. 20172/30670 cut-off events. For 6363/6363 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 196284 event pairs, 10808 based on Foata normal form. 0/28080 useless extension candidates. Maximal degree in co-relation 25479. Up to 28390 conditions per place. [2023-08-04 08:33:12,214 INFO L140 encePairwiseOnDemand]: 749/754 looper letters, 23 selfloop transitions, 5 changer transitions 31/64 dead transitions. [2023-08-04 08:33:12,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 326 flow [2023-08-04 08:33:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:33:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:33:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1598 transitions. [2023-08-04 08:33:12,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42387267904509285 [2023-08-04 08:33:12,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1598 transitions. [2023-08-04 08:33:12,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1598 transitions. [2023-08-04 08:33:12,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:12,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1598 transitions. [2023-08-04 08:33:12,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 319.6) internal successors, (1598), 5 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states 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 08:33:12,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:33:12,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:33:12,220 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 5 states and 1598 transitions. [2023-08-04 08:33:12,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 326 flow [2023-08-04 08:33:12,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:12,226 INFO L231 Difference]: Finished difference. Result has 55 places, 29 transitions, 105 flow [2023-08-04 08:33:12,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=55, PETRI_TRANSITIONS=29} [2023-08-04 08:33:12,226 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-04 08:33:12,226 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 29 transitions, 105 flow [2023-08-04 08:33:12,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 309.6) internal successors, (1548), 5 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states 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 08:33:12,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:12,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 08:33:12,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:12,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 08:33:12,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:12,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:12,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1330041175, now seen corresponding path program 1 times [2023-08-04 08:33:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109263738] [2023-08-04 08:33:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:12,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:12,442 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 08:33:12,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:12,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109263738] [2023-08-04 08:33:12,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109263738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:12,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:12,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:33:12,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386478645] [2023-08-04 08:33:12,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:12,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:12,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:12,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 754 [2023-08-04 08:33:12,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 08:33:12,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:12,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 754 [2023-08-04 08:33:12,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:12,822 INFO L124 PetriNetUnfolderBase]: 1984/3191 cut-off events. [2023-08-04 08:33:12,823 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-04 08:33:12,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6758 conditions, 3191 events. 1984/3191 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15846 event pairs, 1498 based on Foata normal form. 1/3143 useless extension candidates. Maximal degree in co-relation 2883. Up to 2957 conditions per place. [2023-08-04 08:33:12,831 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 08:33:12,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 08:33:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 952 transitions. [2023-08-04 08:33:12,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208664898320071 [2023-08-04 08:33:12,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 952 transitions. [2023-08-04 08:33:12,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 952 transitions. [2023-08-04 08:33:12,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:12,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 952 transitions. [2023-08-04 08:33:12,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 08:33:12,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states 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 08:33:12,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states 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 08:33:12,850 INFO L175 Difference]: Start difference. First operand has 55 places, 29 transitions, 105 flow. Second operand 3 states and 952 transitions. [2023-08-04 08:33:12,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 08:33:12,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:12,851 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 08:33:12,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 08:33:12,851 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-08-04 08:33:12,851 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 08:33:12,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 08:33:12,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:12,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:12,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-04 08:33:12,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:12,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2037678697, now seen corresponding path program 1 times [2023-08-04 08:33:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:12,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095133006] [2023-08-04 08:33:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:12,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:33:12,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:12,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095133006] [2023-08-04 08:33:12,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095133006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:12,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402815301] [2023-08-04 08:33:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:12,914 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:12,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 08:33:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:13,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:13,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:33:13,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:33:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402815301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:13,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:33:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278793949] [2023-08-04 08:33:13,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:13,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 754 [2023-08-04 08:33:13,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 08:33:13,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:13,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 754 [2023-08-04 08:33:13,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:13,304 INFO L124 PetriNetUnfolderBase]: 1432/2243 cut-off events. [2023-08-04 08:33:13,305 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-04 08:33:13,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2243 events. 1432/2243 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9887 event pairs, 784 based on Foata normal form. 2/2212 useless extension candidates. Maximal degree in co-relation 2652. Up to 2073 conditions per place. [2023-08-04 08:33:13,311 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 08:33:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 08:33:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1259 transitions. [2023-08-04 08:33:13,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41744031830238726 [2023-08-04 08:33:13,312 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1259 transitions. [2023-08-04 08:33:13,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1259 transitions. [2023-08-04 08:33:13,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:13,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1259 transitions. [2023-08-04 08:33:13,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.75) internal successors, (1259), 4 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 08:33:13,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 754.0) internal successors, (3770), 5 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states 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 08:33:13,315 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 754.0) internal successors, (3770), 5 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states 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 08:33:13,316 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1259 transitions. [2023-08-04 08:33:13,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 08:33:13,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:13,316 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 08:33:13,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-04 08:33:13,317 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 08:33:13,317 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 08:33:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 08:33:13,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:13,317 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:13,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-04 08:33:13,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:13,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:13,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1715282970, now seen corresponding path program 1 times [2023-08-04 08:33:13,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:13,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16467803] [2023-08-04 08:33:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:33:13,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16467803] [2023-08-04 08:33:13,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16467803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961445323] [2023-08-04 08:33:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:13,547 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:13,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 08:33:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:13,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:33:13,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:33:13,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:13,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961445323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:13,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:13,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:33:13,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649830605] [2023-08-04 08:33:13,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:13,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:13,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:33:13,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 754 [2023-08-04 08:33:13,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 08:33:13,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:13,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 754 [2023-08-04 08:33:13,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:13,932 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 08:33:13,932 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 08:33:13,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4583 conditions, 2195 events. 1400/2195 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9692 event pairs, 344 based on Foata normal form. 0/2178 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 08:33:13,937 INFO L140 encePairwiseOnDemand]: 750/754 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 08:33:13,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 08:33:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:33:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:33:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1575 transitions. [2023-08-04 08:33:13,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177718832891247 [2023-08-04 08:33:13,939 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1575 transitions. [2023-08-04 08:33:13,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1575 transitions. [2023-08-04 08:33:13,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:13,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1575 transitions. [2023-08-04 08:33:13,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 08:33:13,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:33:13,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:33:13,943 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 1575 transitions. [2023-08-04 08:33:13,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 08:33:13,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:33:13,943 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 08:33:13,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-04 08:33:13,944 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 08:33:13,944 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 08:33:13,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 08:33:13,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:13,944 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:13,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:14,150 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 08:33:14,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1316194023, now seen corresponding path program 1 times [2023-08-04 08:33:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398718797] [2023-08-04 08:33:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:33:14,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398718797] [2023-08-04 08:33:14,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398718797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:14,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:14,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:33:14,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760326780] [2023-08-04 08:33:14,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:14,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:14,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:14,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:14,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 754 [2023-08-04 08:33:14,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 08:33:14,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:14,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 754 [2023-08-04 08:33:14,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:14,443 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 08:33:14,443 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 08:33:14,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1967 events. 1272/1967 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8213 event pairs, 992 based on Foata normal form. 4/1966 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 08:33:14,448 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 08:33:14,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 08:33:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 954 transitions. [2023-08-04 08:33:14,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217506631299735 [2023-08-04 08:33:14,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 954 transitions. [2023-08-04 08:33:14,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 954 transitions. [2023-08-04 08:33:14,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:14,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 954 transitions. [2023-08-04 08:33:14,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 08:33:14,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states 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 08:33:14,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 754.0) internal successors, (3016), 4 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states 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 08:33:14,452 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 954 transitions. [2023-08-04 08:33:14,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 08:33:14,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:14,453 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 08:33:14,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-08-04 08:33:14,453 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 08:33:14,453 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 08:33:14,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 08:33:14,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:14,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:14,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-04 08:33:14,454 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 08:33:14,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash -703237121, now seen corresponding path program 1 times [2023-08-04 08:33:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336491769] [2023-08-04 08:33:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:33:14,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336491769] [2023-08-04 08:33:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336491769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574825192] [2023-08-04 08:33:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:14,484 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:14,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-04 08:33:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:14,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:14,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:33:14,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:33:14,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574825192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:14,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:33:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286105734] [2023-08-04 08:33:14,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:14,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:14,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:14,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:14,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 754 [2023-08-04 08:33:14,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 08:33:14,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:14,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 754 [2023-08-04 08:33:14,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:14,823 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 08:33:14,823 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 08:33:14,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1431 events. 936/1431 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5331 event pairs, 536 based on Foata normal form. 8/1434 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 08:33:14,827 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 08:33:14,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 08:33:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1263 transitions. [2023-08-04 08:33:14,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187665782493369 [2023-08-04 08:33:14,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1263 transitions. [2023-08-04 08:33:14,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1263 transitions. [2023-08-04 08:33:14,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:14,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1263 transitions. [2023-08-04 08:33:14,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 315.75) internal successors, (1263), 4 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 08:33:14,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 754.0) internal successors, (3770), 5 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states 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 08:33:14,832 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 754.0) internal successors, (3770), 5 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states 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 08:33:14,832 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1263 transitions. [2023-08-04 08:33:14,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 08:33:14,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:14,833 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 08:33:14,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 08:33:14,833 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-08-04 08:33:14,833 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 08:33:14,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 08:33:14,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:14,833 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:14,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-04 08:33:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-04 08:33:15,038 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 08:33:15,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1809260874, now seen corresponding path program 1 times [2023-08-04 08:33:15,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:15,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716138907] [2023-08-04 08:33:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:33:15,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:15,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716138907] [2023-08-04 08:33:15,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716138907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:15,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046267137] [2023-08-04 08:33:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:15,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:15,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:15,097 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:15,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-04 08:33:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:15,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:33:15,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:33:15,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:15,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046267137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:15,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:15,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:33:15,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881807810] [2023-08-04 08:33:15,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:15,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:15,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:33:15,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 754 [2023-08-04 08:33:15,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 08:33:15,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:15,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 754 [2023-08-04 08:33:15,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:15,450 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 08:33:15,450 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 08:33:15,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1143 events. 744/1143 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3992 event pairs, 104 based on Foata normal form. 64/1202 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 08:33:15,452 INFO L140 encePairwiseOnDemand]: 751/754 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 08:33:15,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 08:33:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:33:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:33:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1579 transitions. [2023-08-04 08:33:15,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188328912466843 [2023-08-04 08:33:15,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1579 transitions. [2023-08-04 08:33:15,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1579 transitions. [2023-08-04 08:33:15,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:15,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1579 transitions. [2023-08-04 08:33:15,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 08:33:15,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:33:15,457 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 754.0) internal successors, (4524), 6 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 08:33:15,457 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 1579 transitions. [2023-08-04 08:33:15,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 08:33:15,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:33:15,458 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 08:33:15,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=754, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 08:33:15,459 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 08:33:15,459 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 08:33:15,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 08:33:15,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:33:15,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:33:15,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:33:15,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:15,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-04 08:33:15,660 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:15,660 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-04 08:33:15,660 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:33:15,660 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:33:15,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:33:15 BasicIcfg [2023-08-04 08:33:15,664 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:33:15,664 INFO L158 Benchmark]: Toolchain (without parser) took 118857.69ms. Allocated memory was 369.1MB in the beginning and 6.7GB in the end (delta: 6.3GB). Free memory was 315.6MB in the beginning and 4.8GB in the end (delta: -4.5GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-08-04 08:33:15,664 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 369.1MB. Free memory is still 314.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:33:15,664 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.60ms. Allocated memory is still 369.1MB. Free memory was 315.6MB in the beginning and 304.0MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 08:33:15,664 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.25ms. Allocated memory is still 369.1MB. Free memory was 303.9MB in the beginning and 301.6MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 08:33:15,664 INFO L158 Benchmark]: Boogie Preprocessor took 20.10ms. Allocated memory is still 369.1MB. Free memory was 301.6MB in the beginning and 300.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:33:15,665 INFO L158 Benchmark]: RCFGBuilder took 436.78ms. Allocated memory is still 369.1MB. Free memory was 299.7MB in the beginning and 280.2MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 08:33:15,665 INFO L158 Benchmark]: TraceAbstraction took 118101.85ms. Allocated memory was 369.1MB in the beginning and 6.7GB in the end (delta: 6.3GB). Free memory was 279.3MB in the beginning and 4.8GB in the end (delta: -4.6GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-08-04 08:33:15,665 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 369.1MB. Free memory is still 314.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 251.60ms. Allocated memory is still 369.1MB. Free memory was 315.6MB in the beginning and 304.0MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.25ms. Allocated memory is still 369.1MB. Free memory was 303.9MB in the beginning and 301.6MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.10ms. Allocated memory is still 369.1MB. Free memory was 301.6MB in the beginning and 300.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 436.78ms. Allocated memory is still 369.1MB. Free memory was 299.7MB in the beginning and 280.2MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 118101.85ms. Allocated memory was 369.1MB in the beginning and 6.7GB in the end (delta: 6.3GB). Free memory was 279.3MB in the beginning and 4.8GB in the end (delta: -4.6GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 222 PlacesBefore, 39 PlacesAfterwards, 243 TransitionsBefore, 41 TransitionsAfterwards, 22644 CoEnabledTransitionPairs, 7 FixpointIterations, 45 TrivialSequentialCompositions, 132 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 59 ConcurrentYvCompositions, 19 ChoiceCompositions, 255 TotalNumberOfCompositions, 24633 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 23705, independent: 23675, independent conditional: 0, independent unconditional: 23675, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 13348, independent: 13330, independent conditional: 0, independent unconditional: 13330, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 23705, independent: 10345, independent conditional: 0, independent unconditional: 10345, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 13348, unknown conditional: 0, unknown unconditional: 13348] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 222 PlacesBefore, 39 PlacesAfterwards, 243 TransitionsBefore, 41 TransitionsAfterwards, 22644 CoEnabledTransitionPairs, 7 FixpointIterations, 45 TrivialSequentialCompositions, 135 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 59 ConcurrentYvCompositions, 19 ChoiceCompositions, 258 TotalNumberOfCompositions, 24714 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 23693, independent: 23666, independent conditional: 0, independent unconditional: 23666, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 13177, independent: 13158, independent conditional: 0, independent unconditional: 13158, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 23693, independent: 10508, independent conditional: 0, independent unconditional: 10508, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 13177, unknown conditional: 0, unknown unconditional: 13177] , Statistics on independence cache: Total cache size (in pairs): 54, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.6s, 321 PlacesBefore, 54 PlacesAfterwards, 357 TransitionsBefore, 59 TransitionsAfterwards, 70380 CoEnabledTransitionPairs, 7 FixpointIterations, 45 TrivialSequentialCompositions, 215 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 104 ConcurrentYvCompositions, 31 ChoiceCompositions, 395 TotalNumberOfCompositions, 87822 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 84511, independent: 84450, independent conditional: 0, independent unconditional: 84450, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 42178, independent: 42148, independent conditional: 0, independent unconditional: 42148, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 84511, independent: 42302, independent conditional: 0, independent unconditional: 42302, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 42178, unknown conditional: 0, unknown unconditional: 42178] , Statistics on independence cache: Total cache size (in pairs): 165, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.2s, 321 PlacesBefore, 54 PlacesAfterwards, 357 TransitionsBefore, 59 TransitionsAfterwards, 70380 CoEnabledTransitionPairs, 8 FixpointIterations, 45 TrivialSequentialCompositions, 215 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 106 ConcurrentYvCompositions, 31 ChoiceCompositions, 397 TotalNumberOfCompositions, 88837 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 84382, independent: 84306, independent conditional: 0, independent unconditional: 84306, dependent: 76, dependent conditional: 0, dependent unconditional: 76, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 42014, independent: 41977, independent conditional: 0, independent unconditional: 41977, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 84382, independent: 42329, independent conditional: 0, independent unconditional: 42329, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 42014, unknown conditional: 0, unknown unconditional: 42014] , Statistics on independence cache: Total cache size (in pairs): 149, Positive cache size: 143, Positive conditional cache size: 0, Positive unconditional cache size: 143, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 80]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 309 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.9s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 139 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 489 IncrementalHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 10 mSDtfsCounter, 489 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 241 NumberOfCodeBlocks, 241 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 344 SizeOfPredicates, 0 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 402 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 89.9s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 62.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3723 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3263 mSDsluCounter, 926 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 853 mSDsCounter, 286 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7514 IncrementalHoareTripleChecker+Invalid, 7800 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 286 mSolverCounterUnsat, 73 mSDtfsCounter, 7514 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 1082 SyntacticMatches, 28 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=724occurred in iteration=16, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 1347 NumberOfCodeBlocks, 1347 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1815 ConstructedInterpolants, 0 QuantifiedInterpolants, 21394 SizeOfPredicates, 226 NumberOfNonLiveVariables, 2811 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 43 InterpolantComputations, 8 PerfectInterpolantSequences, 736/816 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 309 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.9s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 402 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.1s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 267 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 210 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 502 IncrementalHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 15 mSDtfsCounter, 502 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 728 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 157/178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 08:33:15,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...