/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_unroll-4.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:54:15,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:54:15,672 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:54:15,676 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:54:15,676 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:54:15,676 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:54:15,677 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:54:15,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:54:15,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:54:15,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:54:15,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:54:15,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:54:15,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:54:15,700 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:54:15,701 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:54:15,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:54:15,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:54:15,702 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:54:15,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:54:15,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:54:15,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:54:15,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:54:15,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:54:15,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:54:15,708 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:54:15,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:54:15,708 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:54:15,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:54:15,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:54:15,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:54:15,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:54:15,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:54:15,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:54:15,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:54:15,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:54:15,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:54:15,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:54:15,712 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:54:15,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:54:15,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:54:15,712 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:54:15,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:54:15,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:54:15,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:54:15,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:54:15,965 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:54:15,965 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:54:15,966 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c [2023-08-04 09:54:17,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:54:17,302 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:54:17,303 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c [2023-08-04 09:54:17,309 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51aabe155/1f9597c21bda48b5989c8606978662d1/FLAG5b6914d7d [2023-08-04 09:54:17,328 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51aabe155/1f9597c21bda48b5989c8606978662d1 [2023-08-04 09:54:17,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:54:17,336 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:54:17,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:54:17,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:54:17,342 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:54:17,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb150d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17, skipping insertion in model container [2023-08-04 09:54:17,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,369 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:54:17,545 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_unroll-4.wvr_bound2.c[2734,2747] [2023-08-04 09:54:17,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:54:17,556 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:54:17,574 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_unroll-4.wvr_bound2.c[2734,2747] [2023-08-04 09:54:17,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:54:17,588 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:54:17,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17 WrapperNode [2023-08-04 09:54:17,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:54:17,590 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:54:17,590 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:54:17,590 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:54:17,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,620 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 189 [2023-08-04 09:54:17,621 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:54:17,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:54:17,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:54:17,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:54:17,629 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,632 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,632 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,637 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,641 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,643 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,646 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:54:17,646 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:54:17,647 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:54:17,647 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:54:17,647 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (1/1) ... [2023-08-04 09:54:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:54:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:17,676 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 09:54:17,684 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 09:54:17,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:54:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:54:17,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:54:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:54:17,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:54:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:54:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:54:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:54:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:54:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:54:17,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:54:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:54:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:54:17,707 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 09:54:17,779 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:54:17,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:54:18,092 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:54:18,099 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:54:18,100 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 09:54:18,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:54:18 BoogieIcfgContainer [2023-08-04 09:54:18,102 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:54:18,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:54:18,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:54:18,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:54:18,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:54:17" (1/3) ... [2023-08-04 09:54:18,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe5e459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:54:18, skipping insertion in model container [2023-08-04 09:54:18,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:54:17" (2/3) ... [2023-08-04 09:54:18,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe5e459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:54:18, skipping insertion in model container [2023-08-04 09:54:18,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:54:18" (3/3) ... [2023-08-04 09:54:18,108 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-4.wvr_bound2.c [2023-08-04 09:54:18,113 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:54:18,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:54:18,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:54:18,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:54:18,240 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:54:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:18,434 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-04 09:54:18,434 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:54:18,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-04 09:54:18,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:18,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:18,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:54:18,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:18,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:18,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:18,533 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-04 09:54:18,534 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:54:18,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-04 09:54:18,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 10128 [2023-08-04 09:54:22,998 INFO L134 LiptonReduction]: Checked pairs total: 13811 [2023-08-04 09:54:22,999 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-04 09:54:23,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:54:23,016 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;@56963cee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:54:23,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:54:23,020 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:54:23,020 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-04 09:54:23,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:54:23,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:23,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:54:23,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:23,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash -357889986, now seen corresponding path program 1 times [2023-08-04 09:54:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:23,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365860767] [2023-08-04 09:54:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:23,223 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 09:54:23,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:23,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365860767] [2023-08-04 09:54:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365860767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:23,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:23,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:54:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021490976] [2023-08-04 09:54:23,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:23,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:23,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:23,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:23,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:54:23,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-04 09:54:23,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 09:54:23,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:23,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-04 09:54:23,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:23,501 INFO L124 PetriNetUnfolderBase]: 857/1337 cut-off events. [2023-08-04 09:54:23,502 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-04 09:54:23,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 1337 events. 857/1337 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5965 event pairs, 400 based on Foata normal form. 0/917 useless extension candidates. Maximal degree in co-relation 2309. Up to 1295 conditions per place. [2023-08-04 09:54:23,510 INFO L140 encePairwiseOnDemand]: 430/435 looper letters, 34 selfloop transitions, 2 changer transitions 3/43 dead transitions. [2023-08-04 09:54:23,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 182 flow [2023-08-04 09:54:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-04 09:54:23,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567049808429119 [2023-08-04 09:54:23,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-04 09:54:23,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-04 09:54:23,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:23,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-04 09:54:23,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 09:54:23,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:23,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:23,549 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 104 flow. Second operand 3 states and 596 transitions. [2023-08-04 09:54:23,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 182 flow [2023-08-04 09:54:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:54:23,556 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 100 flow [2023-08-04 09:54:23,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, 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=100, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-08-04 09:54:23,561 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-04 09:54:23,561 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 100 flow [2023-08-04 09:54:23,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 09:54:23,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:23,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:23,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:54:23,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:23,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:23,563 INFO L85 PathProgramCache]: Analyzing trace with hash 363307932, now seen corresponding path program 1 times [2023-08-04 09:54:23,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:23,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140952977] [2023-08-04 09:54:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:23,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:23,670 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 09:54:23,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:23,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140952977] [2023-08-04 09:54:23,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140952977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:23,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392728518] [2023-08-04 09:54:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:23,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:23,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:23,674 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 09:54:23,686 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 09:54:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:23,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:23,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:23,763 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 09:54:23,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:23,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392728518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:23,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:23,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:54:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410491273] [2023-08-04 09:54:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:23,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:23,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-04 09:54:23,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:23,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-04 09:54:23,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:23,924 INFO L124 PetriNetUnfolderBase]: 853/1329 cut-off events. [2023-08-04 09:54:23,924 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 09:54:23,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2684 conditions, 1329 events. 853/1329 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6258 event pairs, 268 based on Foata normal form. 0/924 useless extension candidates. Maximal degree in co-relation 2287. Up to 1194 conditions per place. [2023-08-04 09:54:23,931 INFO L140 encePairwiseOnDemand]: 432/435 looper letters, 43 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-04 09:54:23,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 218 flow [2023-08-04 09:54:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-04 09:54:23,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130268199233715 [2023-08-04 09:54:23,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-04 09:54:23,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-04 09:54:23,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:23,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-04 09:54:23,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 09:54:23,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:23,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:23,939 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 100 flow. Second operand 3 states and 602 transitions. [2023-08-04 09:54:23,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 218 flow [2023-08-04 09:54:23,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:54:23,941 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 98 flow [2023-08-04 09:54:23,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=90, 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=98, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-04 09:54:23,942 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-04 09:54:23,942 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 98 flow [2023-08-04 09:54:23,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:23,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:23,953 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 09:54:24,148 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 09:54:24,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:24,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1327835876, now seen corresponding path program 1 times [2023-08-04 09:54:24,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:24,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703706962] [2023-08-04 09:54:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:24,262 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 09:54:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703706962] [2023-08-04 09:54:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703706962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759260649] [2023-08-04 09:54:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:24,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:24,271 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 09:54:24,280 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 09:54:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:24,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:24,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:24,355 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 09:54:24,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759260649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:24,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:24,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:54:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731472044] [2023-08-04 09:54:24,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:24,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:24,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-04 09:54:24,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:24,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:24,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-04 09:54:24,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:24,486 INFO L124 PetriNetUnfolderBase]: 541/871 cut-off events. [2023-08-04 09:54:24,487 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-04 09:54:24,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1874 conditions, 871 events. 541/871 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3701 event pairs, 226 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 806. Up to 553 conditions per place. [2023-08-04 09:54:24,490 INFO L140 encePairwiseOnDemand]: 432/435 looper letters, 47 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 09:54:24,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 53 transitions, 232 flow [2023-08-04 09:54:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-04 09:54:24,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46360153256704983 [2023-08-04 09:54:24,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-04 09:54:24,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-04 09:54:24,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:24,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-04 09:54:24,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 09:54:24,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:24,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:24,497 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 98 flow. Second operand 3 states and 605 transitions. [2023-08-04 09:54:24,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 53 transitions, 232 flow [2023-08-04 09:54:24,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:54:24,499 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 106 flow [2023-08-04 09:54:24,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=94, 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=106, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-04 09:54:24,500 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-04 09:54:24,500 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 106 flow [2023-08-04 09:54:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:24,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:24,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:24,511 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 09:54:24,706 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 09:54:24,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:24,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash 913486798, now seen corresponding path program 1 times [2023-08-04 09:54:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:24,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038388227] [2023-08-04 09:54:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:24,767 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 09:54:24,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038388227] [2023-08-04 09:54:24,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038388227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767004211] [2023-08-04 09:54:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:24,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:24,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:24,770 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 09:54:24,772 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 09:54:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:24,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:24,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:24,852 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 09:54:24,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767004211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:24,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:54:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481075823] [2023-08-04 09:54:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:24,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-04 09:54:24,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 09:54:24,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:24,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-04 09:54:24,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:24,980 INFO L124 PetriNetUnfolderBase]: 524/838 cut-off events. [2023-08-04 09:54:24,980 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2023-08-04 09:54:24,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 838 events. 524/838 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3396 event pairs, 335 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 837. Up to 758 conditions per place. [2023-08-04 09:54:24,984 INFO L140 encePairwiseOnDemand]: 432/435 looper letters, 43 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2023-08-04 09:54:24,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 226 flow [2023-08-04 09:54:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-04 09:54:24,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130268199233715 [2023-08-04 09:54:24,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-04 09:54:24,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-04 09:54:24,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:24,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-04 09:54:24,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 09:54:24,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:24,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:24,991 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 106 flow. Second operand 3 states and 602 transitions. [2023-08-04 09:54:24,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 226 flow [2023-08-04 09:54:24,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:24,994 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 108 flow [2023-08-04 09:54:24,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-08-04 09:54:24,994 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-04 09:54:24,995 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 108 flow [2023-08-04 09:54:24,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 09:54:24,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:24,995 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 09:54:25,007 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 09:54:25,207 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 09:54:25,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:25,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1241814906, now seen corresponding path program 1 times [2023-08-04 09:54:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:25,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173958563] [2023-08-04 09:54:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:25,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:25,304 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 09:54:25,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173958563] [2023-08-04 09:54:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173958563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875485964] [2023-08-04 09:54:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:25,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:25,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:25,306 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 09:54:25,313 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 09:54:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:25,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:54:25,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:25,416 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 09:54:25,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875485964] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:25,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:25,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:54:25,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625906039] [2023-08-04 09:54:25,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:25,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:25,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:25,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:25,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:25,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-04 09:54:25,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:25,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:25,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-04 09:54:25,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:25,536 INFO L124 PetriNetUnfolderBase]: 524/835 cut-off events. [2023-08-04 09:54:25,537 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-08-04 09:54:25,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1853 conditions, 835 events. 524/835 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3374 event pairs, 359 based on Foata normal form. 1/668 useless extension candidates. Maximal degree in co-relation 1680. Up to 818 conditions per place. [2023-08-04 09:54:25,541 INFO L140 encePairwiseOnDemand]: 432/435 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-04 09:54:25,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 178 flow [2023-08-04 09:54:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-04 09:54:25,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521072796934866 [2023-08-04 09:54:25,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-04 09:54:25,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-04 09:54:25,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:25,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-04 09:54:25,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 09:54:25,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:25,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 09:54:25,548 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 108 flow. Second operand 3 states and 590 transitions. [2023-08-04 09:54:25,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 178 flow [2023-08-04 09:54:25,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:54:25,550 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 116 flow [2023-08-04 09:54:25,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=116, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-04 09:54:25,551 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-04 09:54:25,551 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 116 flow [2023-08-04 09:54:25,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:25,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:25,552 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] [2023-08-04 09:54:25,560 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 09:54:25,757 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 09:54:25,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:25,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1342774852, now seen corresponding path program 1 times [2023-08-04 09:54:25,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:25,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704246788] [2023-08-04 09:54:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:25,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:25,826 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 09:54:25,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704246788] [2023-08-04 09:54:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704246788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928714357] [2023-08-04 09:54:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:25,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:25,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:25,828 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 09:54:25,831 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 09:54:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:25,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:54:25,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:25,916 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 09:54:25,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:54:25,933 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 09:54:25,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928714357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:54:25,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:54:25,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:54:25,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375060876] [2023-08-04 09:54:25,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:54:25,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:54:25,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:25,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:54:25,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:25,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 435 [2023-08-04 09:54:25,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states 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 09:54:25,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:25,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 435 [2023-08-04 09:54:25,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:25,969 INFO L124 PetriNetUnfolderBase]: 11/27 cut-off events. [2023-08-04 09:54:25,969 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:54:25,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 27 events. 11/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 1 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 62. Up to 17 conditions per place. [2023-08-04 09:54:25,970 INFO L140 encePairwiseOnDemand]: 432/435 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 09:54:25,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 72 flow [2023-08-04 09:54:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:54:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:54:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 750 transitions. [2023-08-04 09:54:25,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-08-04 09:54:25,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 750 transitions. [2023-08-04 09:54:25,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 750 transitions. [2023-08-04 09:54:25,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:25,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 750 transitions. [2023-08-04 09:54:25,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 09:54:25,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states 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 09:54:25,978 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states 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 09:54:25,978 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 116 flow. Second operand 4 states and 750 transitions. [2023-08-04 09:54:25,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 72 flow [2023-08-04 09:54:25,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 66 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:54:25,979 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 09:54:25,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 09:54:25,980 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -19 predicate places. [2023-08-04 09:54:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 09:54:25,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states 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 09:54:25,982 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:54:25,990 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 09:54:26,190 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 09:54:26,191 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 09:54:26,192 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:54:26,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:26,234 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-04 09:54:26,235 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:54:26,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-04 09:54:26,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:26,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:26,238 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:54:26,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:26,239 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:26,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 09:54:26,275 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-04 09:54:26,276 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:54:26,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-04 09:54:26,284 INFO L119 LiptonReduction]: Number of co-enabled transitions 10128 [2023-08-04 09:54:30,308 INFO L134 LiptonReduction]: Checked pairs total: 14329 [2023-08-04 09:54:30,309 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-04 09:54:30,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:54:30,311 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;@56963cee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:54:30,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:54:30,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:54:30,314 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-08-04 09:54:30,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:54:30,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:30,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:54:30,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:54:30,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1151986217, now seen corresponding path program 1 times [2023-08-04 09:54:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:30,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904387074] [2023-08-04 09:54:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:30,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:30,390 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 09:54:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:30,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904387074] [2023-08-04 09:54:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904387074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:30,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:54:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449974122] [2023-08-04 09:54:30,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:30,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:54:30,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 432 [2023-08-04 09:54:30,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:30,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:30,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 432 [2023-08-04 09:54:30,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:30,536 INFO L124 PetriNetUnfolderBase]: 973/1536 cut-off events. [2023-08-04 09:54:30,536 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-04 09:54:30,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 1536 events. 973/1536 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7265 event pairs, 659 based on Foata normal form. 42/1066 useless extension candidates. Maximal degree in co-relation 2512. Up to 1491 conditions per place. [2023-08-04 09:54:30,540 INFO L140 encePairwiseOnDemand]: 426/432 looper letters, 22 selfloop transitions, 2 changer transitions 13/41 dead transitions. [2023-08-04 09:54:30,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 41 transitions, 174 flow [2023-08-04 09:54:30,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-04 09:54:30,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-04 09:54:30,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-04 09:54:30,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-04 09:54:30,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:30,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-04 09:54:30,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 09:54:30,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states 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 09:54:30,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states 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 09:54:30,548 INFO L175 Difference]: Start difference. First operand has 39 places, 43 transitions, 108 flow. Second operand 3 states and 594 transitions. [2023-08-04 09:54:30,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 41 transitions, 174 flow [2023-08-04 09:54:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:54:30,550 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 76 flow [2023-08-04 09:54:30,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-04 09:54:30,551 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 09:54:30,553 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 76 flow [2023-08-04 09:54:30,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:30,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:30,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:54:30,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:54:30,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1225811633, now seen corresponding path program 1 times [2023-08-04 09:54:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100117091] [2023-08-04 09:54:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:54:30,584 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:54:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:54:30,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:54:30,622 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:54:30,622 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:54:30,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:54:30,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:54:30,623 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:54:30,623 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:54:30,624 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:54:30,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:54:30,664 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:54:30,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 09:54:30,801 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-04 09:54:30,802 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:54:30,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-04 09:54:30,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 09:54:30,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 296 transitions, 640 flow [2023-08-04 09:54:30,827 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:54:30,827 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-04 09:54:30,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-04 09:54:30,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 09:54:30,992 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-04 09:54:30,992 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:54:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-04 09:54:31,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 33576 [2023-08-04 09:54:35,561 INFO L134 LiptonReduction]: Checked pairs total: 60850 [2023-08-04 09:54:35,561 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-04 09:54:35,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:54:35,563 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;@56963cee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:54:35,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:54:35,565 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:54:35,565 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 09:54:35,565 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:54:35,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:35,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:54:35,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:35,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1843710, now seen corresponding path program 1 times [2023-08-04 09:54:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:35,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271129396] [2023-08-04 09:54:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:35,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:35,599 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 09:54:35,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:35,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271129396] [2023-08-04 09:54:35,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271129396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:35,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:35,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:54:35,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503520882] [2023-08-04 09:54:35,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:35,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:35,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:35,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:35,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:54:35,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 583 [2023-08-04 09:54:35,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states 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 09:54:35,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:35,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 583 [2023-08-04 09:54:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:04,258 INFO L124 PetriNetUnfolderBase]: 389656/485279 cut-off events. [2023-08-04 09:55:04,258 INFO L125 PetriNetUnfolderBase]: For 28935/28935 co-relation queries the response was YES. [2023-08-04 09:55:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980178 conditions, 485279 events. 389656/485279 cut-off events. For 28935/28935 co-relation queries the response was YES. Maximal size of possible extension queue 9599. Compared 2862704 event pairs, 228632 based on Foata normal form. 30423/354195 useless extension candidates. Maximal degree in co-relation 285762. Up to 482852 conditions per place. [2023-08-04 09:55:06,916 INFO L140 encePairwiseOnDemand]: 573/583 looper letters, 70 selfloop transitions, 2 changer transitions 2/82 dead transitions. [2023-08-04 09:55:06,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 356 flow [2023-08-04 09:55:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:55:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:55:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 846 transitions. [2023-08-04 09:55:06,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483704974271012 [2023-08-04 09:55:06,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 846 transitions. [2023-08-04 09:55:06,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 846 transitions. [2023-08-04 09:55:06,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:06,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 846 transitions. [2023-08-04 09:55:06,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 09:55:06,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:55:06,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:55:06,926 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 212 flow. Second operand 3 states and 846 transitions. [2023-08-04 09:55:06,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 356 flow [2023-08-04 09:55:06,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 82 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:55:06,935 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 198 flow [2023-08-04 09:55:06,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-08-04 09:55:06,935 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-08-04 09:55:06,936 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 198 flow [2023-08-04 09:55:06,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states 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 09:55:06,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:06,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:06,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:55:06,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:06,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2037289329, now seen corresponding path program 1 times [2023-08-04 09:55:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:06,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421274787] [2023-08-04 09:55:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:06,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:06,966 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 09:55:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421274787] [2023-08-04 09:55:06,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421274787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:55:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226419265] [2023-08-04 09:55:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:06,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:06,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:55:06,973 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 09:55:06,976 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 09:55:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:07,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:55:07,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:55:07,055 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 09:55:07,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:55:07,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226419265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:55:07,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:55:07,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:55:07,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355064223] [2023-08-04 09:55:07,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:55:07,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:55:07,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:07,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:55:07,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:07,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 583 [2023-08-04 09:55:07,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 09:55:07,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:07,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 583 [2023-08-04 09:55:07,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:34,198 INFO L124 PetriNetUnfolderBase]: 387558/485337 cut-off events. [2023-08-04 09:55:34,198 INFO L125 PetriNetUnfolderBase]: For 25297/25297 co-relation queries the response was YES. [2023-08-04 09:55:35,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977456 conditions, 485337 events. 387558/485337 cut-off events. For 25297/25297 co-relation queries the response was YES. Maximal size of possible extension queue 9711. Compared 2920847 event pairs, 204472 based on Foata normal form. 0/324535 useless extension candidates. Maximal degree in co-relation 977404. Up to 478300 conditions per place. [2023-08-04 09:55:36,698 INFO L140 encePairwiseOnDemand]: 580/583 looper letters, 90 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-04 09:55:36,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 434 flow [2023-08-04 09:55:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:55:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:55:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-04 09:55:36,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48999428244711263 [2023-08-04 09:55:36,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-04 09:55:36,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-04 09:55:36,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:36,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-04 09:55:36,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states 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 09:55:36,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:55:36,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:55:36,707 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 198 flow. Second operand 3 states and 857 transitions. [2023-08-04 09:55:36,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 434 flow [2023-08-04 09:55:36,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:55:36,774 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 202 flow [2023-08-04 09:55:36,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2023-08-04 09:55:36,774 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2023-08-04 09:55:36,774 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 202 flow [2023-08-04 09:55:36,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 09:55:36,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:36,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:36,780 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 09:55:36,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:36,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:36,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:36,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1022293651, now seen corresponding path program 1 times [2023-08-04 09:55:36,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:36,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550865870] [2023-08-04 09:55:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:36,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:37,014 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 09:55:37,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550865870] [2023-08-04 09:55:37,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550865870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:55:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334358363] [2023-08-04 09:55:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:37,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:37,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:55:37,016 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 09:55:37,021 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 09:55:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:37,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:55:37,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:55:37,103 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 09:55:37,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:55:37,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334358363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:55:37,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:55:37,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:55:37,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437126133] [2023-08-04 09:55:37,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:55:37,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:55:37,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:37,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:55:37,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:37,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 583 [2023-08-04 09:55:37,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 09:55:37,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:37,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 583 [2023-08-04 09:55:37,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:56,404 INFO L124 PetriNetUnfolderBase]: 285494/363871 cut-off events. [2023-08-04 09:55:56,404 INFO L125 PetriNetUnfolderBase]: For 24893/24893 co-relation queries the response was YES. [2023-08-04 09:55:57,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749068 conditions, 363871 events. 285494/363871 cut-off events. For 24893/24893 co-relation queries the response was YES. Maximal size of possible extension queue 7565. Compared 2289449 event pairs, 137924 based on Foata normal form. 0/258915 useless extension candidates. Maximal degree in co-relation 218083. Up to 239496 conditions per place. [2023-08-04 09:55:58,638 INFO L140 encePairwiseOnDemand]: 580/583 looper letters, 109 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-04 09:55:58,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 522 flow [2023-08-04 09:55:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:55:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:55:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 875 transitions. [2023-08-04 09:55:58,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5002858776443682 [2023-08-04 09:55:58,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 875 transitions. [2023-08-04 09:55:58,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 875 transitions. [2023-08-04 09:55:58,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:58,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 875 transitions. [2023-08-04 09:55:58,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 09:55:58,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:55:58,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:55:58,682 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 202 flow. Second operand 3 states and 875 transitions. [2023-08-04 09:55:58,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 522 flow [2023-08-04 09:55:58,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 119 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:55:58,693 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 212 flow [2023-08-04 09:55:58,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-04 09:55:58,694 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-08-04 09:55:58,694 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 212 flow [2023-08-04 09:55:58,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 09:55:58,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:58,694 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] [2023-08-04 09:55:58,709 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 09:55:58,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:58,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:58,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:58,897 INFO L85 PathProgramCache]: Analyzing trace with hash 466726695, now seen corresponding path program 1 times [2023-08-04 09:55:58,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:58,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439830412] [2023-08-04 09:55:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:58,987 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 09:55:58,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439830412] [2023-08-04 09:55:58,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439830412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:55:58,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176859918] [2023-08-04 09:55:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:58,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:55:58,997 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 09:55:59,064 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 09:55:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:59,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:55:59,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:55:59,179 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 09:55:59,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:55:59,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176859918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:55:59,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:55:59,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:55:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435387580] [2023-08-04 09:55:59,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:55:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:55:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:55:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:59,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 583 [2023-08-04 09:55:59,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:59,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:59,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 583 [2023-08-04 09:55:59,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:56:19,233 INFO L124 PetriNetUnfolderBase]: 275412/348745 cut-off events. [2023-08-04 09:56:19,234 INFO L125 PetriNetUnfolderBase]: For 82374/82374 co-relation queries the response was YES. [2023-08-04 09:56:19,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743558 conditions, 348745 events. 275412/348745 cut-off events. For 82374/82374 co-relation queries the response was YES. Maximal size of possible extension queue 7217. Compared 2116561 event pairs, 180548 based on Foata normal form. 0/254642 useless extension candidates. Maximal degree in co-relation 294047. Up to 306597 conditions per place. [2023-08-04 09:56:21,073 INFO L140 encePairwiseOnDemand]: 580/583 looper letters, 110 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-04 09:56:21,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 534 flow [2023-08-04 09:56:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:56:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:56:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 875 transitions. [2023-08-04 09:56:21,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5002858776443682 [2023-08-04 09:56:21,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 875 transitions. [2023-08-04 09:56:21,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 875 transitions. [2023-08-04 09:56:21,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:56:21,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 875 transitions. [2023-08-04 09:56:21,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 09:56:21,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:56:21,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:56:21,081 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 212 flow. Second operand 3 states and 875 transitions. [2023-08-04 09:56:21,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 534 flow [2023-08-04 09:56:22,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 120 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:56:22,384 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 222 flow [2023-08-04 09:56:22,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-04 09:56:22,384 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-04 09:56:22,385 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 222 flow [2023-08-04 09:56:22,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:22,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:22,385 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 09:56:22,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:56:22,591 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,SelfDestructingSolverStorable11 [2023-08-04 09:56:22,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:22,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash -990801775, now seen corresponding path program 1 times [2023-08-04 09:56:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:22,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085210402] [2023-08-04 09:56:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:22,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:22,630 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 09:56:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085210402] [2023-08-04 09:56:22,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085210402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:56:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250998138] [2023-08-04 09:56:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:22,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:56:22,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:56:22,632 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 09:56:22,657 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 09:56:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:22,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:56:22,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:56:22,737 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 09:56:22,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:56:22,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250998138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:56:22,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:56:22,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:56:22,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811857512] [2023-08-04 09:56:22,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:56:22,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:56:22,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:22,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:56:22,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:56:22,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 583 [2023-08-04 09:56:22,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 09:56:22,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:22,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 583 [2023-08-04 09:56:22,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:56:41,873 INFO L124 PetriNetUnfolderBase]: 275412/348722 cut-off events. [2023-08-04 09:56:41,873 INFO L125 PetriNetUnfolderBase]: For 71956/71956 co-relation queries the response was YES. [2023-08-04 09:56:42,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 745638 conditions, 348722 events. 275412/348722 cut-off events. For 71956/71956 co-relation queries the response was YES. Maximal size of possible extension queue 7217. Compared 2107343 event pairs, 202969 based on Foata normal form. 1/255268 useless extension candidates. Maximal degree in co-relation 641469. Up to 345815 conditions per place. [2023-08-04 09:56:43,782 INFO L140 encePairwiseOnDemand]: 580/583 looper letters, 68 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:56:43,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 364 flow [2023-08-04 09:56:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:56:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:56:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-08-04 09:56:43,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47570040022870214 [2023-08-04 09:56:43,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-08-04 09:56:43,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-08-04 09:56:43,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:56:43,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-08-04 09:56:43,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:56:43,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:56:43,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:56:43,789 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 222 flow. Second operand 3 states and 832 transitions. [2023-08-04 09:56:43,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 364 flow [2023-08-04 09:56:47,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 78 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:56:47,178 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 232 flow [2023-08-04 09:56:47,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2023-08-04 09:56:47,179 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2023-08-04 09:56:47,179 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 232 flow [2023-08-04 09:56:47,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 09:56:47,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:47,180 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] [2023-08-04 09:56:47,184 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 09:56:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:56:47,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:47,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1352509052, now seen corresponding path program 1 times [2023-08-04 09:56:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403533817] [2023-08-04 09:56:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:47,425 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 09:56:47,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:47,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403533817] [2023-08-04 09:56:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403533817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:56:47,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251332977] [2023-08-04 09:56:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:47,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:56:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:56:47,427 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 09:56:47,430 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 09:56:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:47,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:56:47,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:56:47,515 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 09:56:47,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:56:47,530 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 09:56:47,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251332977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:56:47,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:56:47,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:56:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317580302] [2023-08-04 09:56:47,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:56:47,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:56:47,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:56:47,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:56:47,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 583 [2023-08-04 09:56:47,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states 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 09:56:47,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:47,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 583 [2023-08-04 09:56:47,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:57:06,525 INFO L124 PetriNetUnfolderBase]: 249112/313588 cut-off events. [2023-08-04 09:57:06,525 INFO L125 PetriNetUnfolderBase]: For 56261/56261 co-relation queries the response was YES. [2023-08-04 09:57:07,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669922 conditions, 313588 events. 249112/313588 cut-off events. For 56261/56261 co-relation queries the response was YES. Maximal size of possible extension queue 6638. Compared 1834099 event pairs, 107969 based on Foata normal form. 6/229194 useless extension candidates. Maximal degree in co-relation 669903. Up to 311281 conditions per place. [2023-08-04 09:57:08,185 INFO L140 encePairwiseOnDemand]: 579/583 looper letters, 82 selfloop transitions, 3 changer transitions 1/94 dead transitions. [2023-08-04 09:57:08,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 94 transitions, 436 flow [2023-08-04 09:57:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:57:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:57:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1099 transitions. [2023-08-04 09:57:08,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712692967409949 [2023-08-04 09:57:08,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1099 transitions. [2023-08-04 09:57:08,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1099 transitions. [2023-08-04 09:57:08,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:57:08,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1099 transitions. [2023-08-04 09:57:08,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states 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 09:57:08,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:57:08,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:57:08,196 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 232 flow. Second operand 4 states and 1099 transitions. [2023-08-04 09:57:08,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 94 transitions, 436 flow [2023-08-04 09:57:09,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:57:09,726 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 242 flow [2023-08-04 09:57:09,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-04 09:57:09,726 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 10 predicate places. [2023-08-04 09:57:09,726 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 242 flow [2023-08-04 09:57:09,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states 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 09:57:09,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:57:09,727 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] [2023-08-04 09:57:09,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:57:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:57:09,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:57:09,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:57:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash -74030680, now seen corresponding path program 1 times [2023-08-04 09:57:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:57:09,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026812567] [2023-08-04 09:57:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:57:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:57:09,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:57:09,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026812567] [2023-08-04 09:57:09,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026812567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:57:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414188201] [2023-08-04 09:57:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:09,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:57:09,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:57:09,976 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 09:57:09,978 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 09:57:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:10,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:57:10,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:57:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:57:10,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:57:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:57:10,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414188201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:57:10,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:57:10,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:57:10,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376304088] [2023-08-04 09:57:10,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:57:10,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:57:10,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:57:10,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:57:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:57:10,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 583 [2023-08-04 09:57:10,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 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 09:57:10,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:57:10,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 583 [2023-08-04 09:57:10,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:57:27,307 INFO L124 PetriNetUnfolderBase]: 243130/309648 cut-off events. [2023-08-04 09:57:27,307 INFO L125 PetriNetUnfolderBase]: For 26751/26751 co-relation queries the response was YES. [2023-08-04 09:57:28,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656915 conditions, 309648 events. 243130/309648 cut-off events. For 26751/26751 co-relation queries the response was YES. Maximal size of possible extension queue 6829. Compared 1898018 event pairs, 66820 based on Foata normal form. 480/228146 useless extension candidates. Maximal degree in co-relation 656888. Up to 224502 conditions per place. [2023-08-04 09:57:29,085 INFO L140 encePairwiseOnDemand]: 579/583 looper letters, 130 selfloop transitions, 3 changer transitions 1/142 dead transitions. [2023-08-04 09:57:29,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 638 flow [2023-08-04 09:57:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:57:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:57:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1147 transitions. [2023-08-04 09:57:29,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491852487135506 [2023-08-04 09:57:29,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1147 transitions. [2023-08-04 09:57:29,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1147 transitions. [2023-08-04 09:57:29,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:57:29,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1147 transitions. [2023-08-04 09:57:29,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.75) internal successors, (1147), 4 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states 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 09:57:29,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:57:29,095 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:57:29,095 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 242 flow. Second operand 4 states and 1147 transitions. [2023-08-04 09:57:29,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 638 flow [2023-08-04 09:57:43,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 142 transitions, 629 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:57:43,516 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 247 flow [2023-08-04 09:57:43,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2023-08-04 09:57:43,517 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2023-08-04 09:57:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 247 flow [2023-08-04 09:57:43,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 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 09:57:43,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:57:43,518 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] [2023-08-04 09:57:43,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 09:57:43,722 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,SelfDestructingSolverStorable14 [2023-08-04 09:57:43,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:57:43,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:57:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash -414900349, now seen corresponding path program 1 times [2023-08-04 09:57:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:57:43,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676351214] [2023-08-04 09:57:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:57:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:43,791 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 09:57:43,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:57:43,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676351214] [2023-08-04 09:57:43,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676351214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:57:43,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127832] [2023-08-04 09:57:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:43,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:57:43,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:57:43,792 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 09:57:43,797 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 09:57:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:43,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:57:43,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:57:43,907 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 09:57:43,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:57:43,922 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 09:57:43,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:57:43,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:57:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:57:43,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598684249] [2023-08-04 09:57:43,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:57:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:57:43,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:57:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:57:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:57:43,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 583 [2023-08-04 09:57:43,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states 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 09:57:43,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:57:43,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 583 [2023-08-04 09:57:43,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:57:56,493 INFO L124 PetriNetUnfolderBase]: 179301/228290 cut-off events. [2023-08-04 09:57:56,493 INFO L125 PetriNetUnfolderBase]: For 97190/97190 co-relation queries the response was YES. [2023-08-04 09:57:57,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506076 conditions, 228290 events. 179301/228290 cut-off events. For 97190/97190 co-relation queries the response was YES. Maximal size of possible extension queue 5018. Compared 1379775 event pairs, 50138 based on Foata normal form. 3570/170348 useless extension candidates. Maximal degree in co-relation 506050. Up to 98532 conditions per place. [2023-08-04 09:57:57,726 INFO L140 encePairwiseOnDemand]: 579/583 looper letters, 148 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2023-08-04 09:57:57,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 160 transitions, 724 flow [2023-08-04 09:57:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:57:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:57:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1165 transitions. [2023-08-04 09:57:57,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4995711835334477 [2023-08-04 09:57:57,730 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1165 transitions. [2023-08-04 09:57:57,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1165 transitions. [2023-08-04 09:57:57,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:57:57,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1165 transitions. [2023-08-04 09:57:57,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.25) internal successors, (1165), 4 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:57,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:57:57,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:57:57,735 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 247 flow. Second operand 4 states and 1165 transitions. [2023-08-04 09:57:57,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 160 transitions, 724 flow [2023-08-04 09:57:59,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 160 transitions, 714 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:57:59,281 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 258 flow [2023-08-04 09:57:59,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2023-08-04 09:57:59,281 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2023-08-04 09:57:59,281 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 258 flow [2023-08-04 09:57:59,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states 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 09:57:59,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:57:59,282 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] [2023-08-04 09:57:59,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 09:57:59,486 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,SelfDestructingSolverStorable15 [2023-08-04 09:57:59,487 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:57:59,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:57:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash 250808096, now seen corresponding path program 1 times [2023-08-04 09:57:59,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:57:59,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148942395] [2023-08-04 09:57:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:59,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:57:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:57:59,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:57:59,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148942395] [2023-08-04 09:57:59,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148942395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:57:59,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936802684] [2023-08-04 09:57:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:59,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:57:59,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:57:59,539 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 09:57:59,541 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 09:57:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:59,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:57:59,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:57:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:57:59,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:57:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:57:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936802684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:57:59,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:57:59,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:57:59,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531658983] [2023-08-04 09:57:59,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:57:59,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:57:59,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:57:59,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:57:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:57:59,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 583 [2023-08-04 09:57:59,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 259.8) internal successors, (1299), 5 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states 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 09:57:59,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:57:59,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 583 [2023-08-04 09:57:59,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:58:13,128 INFO L124 PetriNetUnfolderBase]: 179253/226159 cut-off events. [2023-08-04 09:58:13,128 INFO L125 PetriNetUnfolderBase]: For 137581/137581 co-relation queries the response was YES. [2023-08-04 09:58:13,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520951 conditions, 226159 events. 179253/226159 cut-off events. For 137581/137581 co-relation queries the response was YES. Maximal size of possible extension queue 4965. Compared 1299426 event pairs, 129563 based on Foata normal form. 43/164370 useless extension candidates. Maximal degree in co-relation 520925. Up to 218973 conditions per place. [2023-08-04 09:58:14,258 INFO L140 encePairwiseOnDemand]: 579/583 looper letters, 136 selfloop transitions, 3 changer transitions 14/161 dead transitions. [2023-08-04 09:58:14,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 736 flow [2023-08-04 09:58:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:58:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:58:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1165 transitions. [2023-08-04 09:58:14,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4995711835334477 [2023-08-04 09:58:14,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1165 transitions. [2023-08-04 09:58:14,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1165 transitions. [2023-08-04 09:58:14,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:58:14,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1165 transitions. [2023-08-04 09:58:14,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.25) internal successors, (1165), 4 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:58:14,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:58:14,267 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:58:14,267 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 258 flow. Second operand 4 states and 1165 transitions. [2023-08-04 09:58:14,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 736 flow [2023-08-04 09:58:15,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 161 transitions, 732 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:58:15,961 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 254 flow [2023-08-04 09:58:15,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-08-04 09:58:15,962 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2023-08-04 09:58:15,962 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 254 flow [2023-08-04 09:58:15,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.8) internal successors, (1299), 5 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states 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 09:58:15,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:58:15,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:58:15,971 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 09:58:16,168 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,SelfDestructingSolverStorable16 [2023-08-04 09:58:16,169 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:58:16,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:58:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2069377224, now seen corresponding path program 1 times [2023-08-04 09:58:16,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:58:16,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900953423] [2023-08-04 09:58:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:58:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:58:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:58:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:58:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:58:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900953423] [2023-08-04 09:58:16,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900953423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:58:16,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:58:16,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 09:58:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903284883] [2023-08-04 09:58:16,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:58:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:58:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:58:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:58:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:58:16,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 583 [2023-08-04 09:58:16,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 09:58:16,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:58:16,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 583 [2023-08-04 09:58:16,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:58:25,528 INFO L124 PetriNetUnfolderBase]: 127897/161940 cut-off events. [2023-08-04 09:58:25,529 INFO L125 PetriNetUnfolderBase]: For 100163/100163 co-relation queries the response was YES. [2023-08-04 09:58:26,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372399 conditions, 161940 events. 127897/161940 cut-off events. For 100163/100163 co-relation queries the response was YES. Maximal size of possible extension queue 3469. Compared 925467 event pairs, 19081 based on Foata normal form. 1/130623 useless extension candidates. Maximal degree in co-relation 372371. Up to 152924 conditions per place. [2023-08-04 09:58:26,704 INFO L140 encePairwiseOnDemand]: 577/583 looper letters, 102 selfloop transitions, 5 changer transitions 1/116 dead transitions. [2023-08-04 09:58:26,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 644 flow [2023-08-04 09:58:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:58:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:58:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 847 transitions. [2023-08-04 09:58:26,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2023-08-04 09:58:26,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 847 transitions. [2023-08-04 09:58:26,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 847 transitions. [2023-08-04 09:58:26,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:58:26,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 847 transitions. [2023-08-04 09:58:26,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states 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 09:58:26,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:58:26,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states 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 09:58:26,724 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 254 flow. Second operand 3 states and 847 transitions. [2023-08-04 09:58:26,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 644 flow [2023-08-04 09:58:27,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 116 transitions, 628 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:58:27,512 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 279 flow [2023-08-04 09:58:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2023-08-04 09:58:27,512 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2023-08-04 09:58:27,512 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 279 flow [2023-08-04 09:58:27,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 09:58:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:58:27,513 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] [2023-08-04 09:58:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 09:58:27,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:58:27,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:58:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1205895129, now seen corresponding path program 1 times [2023-08-04 09:58:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:58:27,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389255259] [2023-08-04 09:58:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:58:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:58:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:58:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:58:27,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:58:27,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389255259] [2023-08-04 09:58:27,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389255259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:58:27,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:58:27,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:58:27,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865574564] [2023-08-04 09:58:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:58:27,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:58:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:58:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:58:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:58:27,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 583 [2023-08-04 09:58:27,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 09:58:27,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:58:27,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 583 [2023-08-04 09:58:27,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:58:42,916 INFO L124 PetriNetUnfolderBase]: 189093/240307 cut-off events. [2023-08-04 09:58:42,917 INFO L125 PetriNetUnfolderBase]: For 140891/140891 co-relation queries the response was YES. [2023-08-04 09:58:43,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586158 conditions, 240307 events. 189093/240307 cut-off events. For 140891/140891 co-relation queries the response was YES. Maximal size of possible extension queue 5008. Compared 1452414 event pairs, 34662 based on Foata normal form. 0/203834 useless extension candidates. Maximal degree in co-relation 586129. Up to 157023 conditions per place. [2023-08-04 09:58:44,678 INFO L140 encePairwiseOnDemand]: 576/583 looper letters, 155 selfloop transitions, 7 changer transitions 1/170 dead transitions. [2023-08-04 09:58:44,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 170 transitions, 959 flow [2023-08-04 09:58:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:58:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:58:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1145 transitions. [2023-08-04 09:58:44,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49099485420240135 [2023-08-04 09:58:44,681 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1145 transitions. [2023-08-04 09:58:44,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1145 transitions. [2023-08-04 09:58:44,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:58:44,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1145 transitions. [2023-08-04 09:58:44,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.25) internal successors, (1145), 4 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states 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 09:58:44,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:58:44,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:58:44,686 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 279 flow. Second operand 4 states and 1145 transitions. [2023-08-04 09:58:44,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 170 transitions, 959 flow [2023-08-04 09:58:44,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 170 transitions, 950 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:58:44,824 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 336 flow [2023-08-04 09:58:44,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2023-08-04 09:58:44,824 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 19 predicate places. [2023-08-04 09:58:44,824 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 336 flow [2023-08-04 09:58:44,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 09:58:44,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:58:44,825 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] [2023-08-04 09:58:44,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 09:58:44,825 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:58:44,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:58:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash -634714331, now seen corresponding path program 2 times [2023-08-04 09:58:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:58:44,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357144945] [2023-08-04 09:58:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:58:44,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:58:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:58:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:58:44,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:58:44,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357144945] [2023-08-04 09:58:44,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357144945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:58:44,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:58:44,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:58:44,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633109622] [2023-08-04 09:58:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:58:44,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:58:44,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:58:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:58:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:58:44,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 583 [2023-08-04 09:58:44,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 09:58:44,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:58:44,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 583 [2023-08-04 09:58:44,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:09,292 INFO L124 PetriNetUnfolderBase]: 276544/356461 cut-off events. [2023-08-04 09:59:09,293 INFO L125 PetriNetUnfolderBase]: For 332495/332522 co-relation queries the response was YES. [2023-08-04 09:59:10,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962481 conditions, 356461 events. 276544/356461 cut-off events. For 332495/332522 co-relation queries the response was YES. Maximal size of possible extension queue 7178. Compared 2275062 event pairs, 108396 based on Foata normal form. 6314/362602 useless extension candidates. Maximal degree in co-relation 962450. Up to 159346 conditions per place. [2023-08-04 09:59:11,962 INFO L140 encePairwiseOnDemand]: 577/583 looper letters, 185 selfloop transitions, 7 changer transitions 0/199 dead transitions. [2023-08-04 09:59:11,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 199 transitions, 1145 flow [2023-08-04 09:59:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:59:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:59:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1165 transitions. [2023-08-04 09:59:11,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4995711835334477 [2023-08-04 09:59:11,964 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1165 transitions. [2023-08-04 09:59:11,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1165 transitions. [2023-08-04 09:59:11,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:59:11,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1165 transitions. [2023-08-04 09:59:11,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.25) internal successors, (1165), 4 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:59:11,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:59:11,968 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 09:59:11,968 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 336 flow. Second operand 4 states and 1165 transitions. [2023-08-04 09:59:11,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 199 transitions, 1145 flow [2023-08-04 09:59:13,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 199 transitions, 1145 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:59:13,597 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 384 flow [2023-08-04 09:59:13,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2023-08-04 09:59:13,598 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 24 predicate places. [2023-08-04 09:59:13,598 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 384 flow [2023-08-04 09:59:13,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 09:59:13,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:13,598 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] [2023-08-04 09:59:13,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 09:59:13,598 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:13,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:13,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2069002490, now seen corresponding path program 1 times [2023-08-04 09:59:13,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:13,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961274207] [2023-08-04 09:59:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:13,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:59:13,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:13,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961274207] [2023-08-04 09:59:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961274207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:13,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:59:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:59:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218484712] [2023-08-04 09:59:13,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:13,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:59:13,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:13,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:59:13,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:59:13,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 583 [2023-08-04 09:59:13,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 09:59:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 583 [2023-08-04 09:59:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:59:59,967 INFO L124 PetriNetUnfolderBase]: 427885/562650 cut-off events. [2023-08-04 09:59:59,967 INFO L125 PetriNetUnfolderBase]: For 776173/796530 co-relation queries the response was YES. [2023-08-04 10:00:02,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622586 conditions, 562650 events. 427885/562650 cut-off events. For 776173/796530 co-relation queries the response was YES. Maximal size of possible extension queue 10822. Compared 3892398 event pairs, 248947 based on Foata normal form. 30221/592472 useless extension candidates. Maximal degree in co-relation 1622552. Up to 302907 conditions per place. [2023-08-04 10:00:04,693 INFO L140 encePairwiseOnDemand]: 577/583 looper letters, 200 selfloop transitions, 4 changer transitions 3/215 dead transitions. [2023-08-04 10:00:04,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 215 transitions, 1359 flow [2023-08-04 10:00:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:00:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:00:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1169 transitions. [2023-08-04 10:00:04,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012864493996569 [2023-08-04 10:00:04,695 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1169 transitions. [2023-08-04 10:00:04,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1169 transitions. [2023-08-04 10:00:04,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:00:04,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1169 transitions. [2023-08-04 10:00:04,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 292.25) internal successors, (1169), 4 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states 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 10:00:04,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:00:04,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:00:04,700 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 384 flow. Second operand 4 states and 1169 transitions. [2023-08-04 10:00:04,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 215 transitions, 1359 flow [2023-08-04 10:00:16,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 215 transitions, 1333 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 10:00:16,286 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 409 flow [2023-08-04 10:00:16,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=409, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-04 10:00:16,286 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 28 predicate places. [2023-08-04 10:00:16,287 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 409 flow [2023-08-04 10:00:16,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 10:00:16,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:00:16,287 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] [2023-08-04 10:00:16,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 10:00:16,287 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:00:16,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:00:16,288 INFO L85 PathProgramCache]: Analyzing trace with hash 60600633, now seen corresponding path program 3 times [2023-08-04 10:00:16,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:00:16,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373494514] [2023-08-04 10:00:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:00:16,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:00:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:00:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 10:00:16,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:00:16,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373494514] [2023-08-04 10:00:16,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373494514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:00:16,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:00:16,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 10:00:16,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287119185] [2023-08-04 10:00:16,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:00:16,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 10:00:16,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:00:16,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 10:00:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 10:00:16,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 583 [2023-08-04 10:00:16,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 409 flow. Second operand has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 10:00:16,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:00:16,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 583 [2023-08-04 10:00:16,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:01:03,760 INFO L124 PetriNetUnfolderBase]: 400392/521291 cut-off events. [2023-08-04 10:01:03,760 INFO L125 PetriNetUnfolderBase]: For 924927/937308 co-relation queries the response was YES. [2023-08-04 10:01:06,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616571 conditions, 521291 events. 400392/521291 cut-off events. For 924927/937308 co-relation queries the response was YES. Maximal size of possible extension queue 10466. Compared 3504001 event pairs, 194139 based on Foata normal form. 21438/542573 useless extension candidates. Maximal degree in co-relation 1616535. Up to 239714 conditions per place. [2023-08-04 10:01:08,431 INFO L140 encePairwiseOnDemand]: 576/583 looper letters, 182 selfloop transitions, 14 changer transitions 5/208 dead transitions. [2023-08-04 10:01:08,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 208 transitions, 1308 flow [2023-08-04 10:01:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:01:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:01:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1166 transitions. [2023-08-04 10:01:08,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 10:01:08,433 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1166 transitions. [2023-08-04 10:01:08,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1166 transitions. [2023-08-04 10:01:08,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:01:08,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1166 transitions. [2023-08-04 10:01:08,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states 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 10:01:08,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:01:08,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:01:08,438 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 409 flow. Second operand 4 states and 1166 transitions. [2023-08-04 10:01:08,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 208 transitions, 1308 flow [2023-08-04 10:01:34,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 208 transitions, 1283 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 10:01:34,164 INFO L231 Difference]: Finished difference. Result has 103 places, 95 transitions, 494 flow [2023-08-04 10:01:34,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=494, PETRI_PLACES=103, PETRI_TRANSITIONS=95} [2023-08-04 10:01:34,165 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 31 predicate places. [2023-08-04 10:01:34,165 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 95 transitions, 494 flow [2023-08-04 10:01:34,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 10:01:34,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:01:34,166 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] [2023-08-04 10:01:34,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 10:01:34,166 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:01:34,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:01:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash 70888524, now seen corresponding path program 2 times [2023-08-04 10:01:34,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:01:34,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164854751] [2023-08-04 10:01:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:01:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:01:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:01:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 10:01:34,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:01:34,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164854751] [2023-08-04 10:01:34,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164854751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:01:34,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:01:34,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 10:01:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62857916] [2023-08-04 10:01:34,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:01:34,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 10:01:34,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:01:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 10:01:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 10:01:34,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 583 [2023-08-04 10:01:34,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 95 transitions, 494 flow. Second operand has 4 states, 4 states have (on average 255.25) internal successors, (1021), 4 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 10:01:34,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:01:34,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 583 [2023-08-04 10:01:34,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:02:32,081 INFO L124 PetriNetUnfolderBase]: 468172/616448 cut-off events. [2023-08-04 10:02:32,081 INFO L125 PetriNetUnfolderBase]: For 1258950/1294221 co-relation queries the response was YES. [2023-08-04 10:02:35,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1950650 conditions, 616448 events. 468172/616448 cut-off events. For 1258950/1294221 co-relation queries the response was YES. Maximal size of possible extension queue 11077. Compared 4285247 event pairs, 287210 based on Foata normal form. 42963/659206 useless extension candidates. Maximal degree in co-relation 1950613. Up to 461757 conditions per place. [2023-08-04 10:02:37,939 INFO L140 encePairwiseOnDemand]: 577/583 looper letters, 189 selfloop transitions, 4 changer transitions 0/201 dead transitions. [2023-08-04 10:02:37,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 201 transitions, 1434 flow [2023-08-04 10:02:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:02:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:02:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1129 transitions. [2023-08-04 10:02:37,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841337907375643 [2023-08-04 10:02:37,941 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1129 transitions. [2023-08-04 10:02:37,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1129 transitions. [2023-08-04 10:02:37,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:02:37,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1129 transitions. [2023-08-04 10:02:37,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states 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 10:02:37,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:02:37,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:02:37,945 INFO L175 Difference]: Start difference. First operand has 103 places, 95 transitions, 494 flow. Second operand 4 states and 1129 transitions. [2023-08-04 10:02:37,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 201 transitions, 1434 flow [2023-08-04 10:03:06,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 201 transitions, 1386 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-04 10:03:06,191 INFO L231 Difference]: Finished difference. Result has 104 places, 97 transitions, 515 flow [2023-08-04 10:03:06,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=515, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2023-08-04 10:03:06,191 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 32 predicate places. [2023-08-04 10:03:06,191 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 515 flow [2023-08-04 10:03:06,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.25) internal successors, (1021), 4 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 10:03:06,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:06,192 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] [2023-08-04 10:03:06,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 10:03:06,192 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:06,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash -661155590, now seen corresponding path program 3 times [2023-08-04 10:03:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:06,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444018313] [2023-08-04 10:03:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 10:03:06,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:06,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444018313] [2023-08-04 10:03:06,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444018313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:06,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:03:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 10:03:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852190393] [2023-08-04 10:03:06,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:06,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 10:03:06,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 10:03:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 10:03:06,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 583 [2023-08-04 10:03:06,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 515 flow. Second operand has 4 states, 4 states have (on average 257.75) internal successors, (1031), 4 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states 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 10:03:06,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:06,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 583 [2023-08-04 10:03:06,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:04:23,219 INFO L124 PetriNetUnfolderBase]: 642127/840141 cut-off events. [2023-08-04 10:04:23,219 INFO L125 PetriNetUnfolderBase]: For 1903386/1938774 co-relation queries the response was YES. [2023-08-04 10:04:28,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2817014 conditions, 840141 events. 642127/840141 cut-off events. For 1903386/1938774 co-relation queries the response was YES. Maximal size of possible extension queue 14815. Compared 5995433 event pairs, 272358 based on Foata normal form. 49034/889103 useless extension candidates. Maximal degree in co-relation 2816976. Up to 639024 conditions per place. [2023-08-04 10:04:32,910 INFO L140 encePairwiseOnDemand]: 576/583 looper letters, 161 selfloop transitions, 10 changer transitions 11/190 dead transitions. [2023-08-04 10:04:32,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 190 transitions, 1342 flow [2023-08-04 10:04:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:04:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:04:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1142 transitions. [2023-08-04 10:04:32,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897084048027444 [2023-08-04 10:04:32,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1142 transitions. [2023-08-04 10:04:32,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1142 transitions. [2023-08-04 10:04:32,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:04:32,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1142 transitions. [2023-08-04 10:04:32,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.5) internal successors, (1142), 4 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states 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 10:04:32,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:04:32,920 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 583.0) internal successors, (2915), 5 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states 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 10:04:32,920 INFO L175 Difference]: Start difference. First operand has 104 places, 97 transitions, 515 flow. Second operand 4 states and 1142 transitions. [2023-08-04 10:04:32,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 190 transitions, 1342 flow Received shutdown request... [2023-08-04 10:04:40,436 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 10:04:41,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown