/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-min-array.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:28:17,479 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:28:17,564 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 09:28:17,569 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:28:17,570 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:28:17,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:28:17,601 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:28:17,601 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:28:17,602 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:28:17,605 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:28:17,606 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:28:17,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:28:17,606 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:28:17,607 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:28:17,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:28:17,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:28:17,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:28:17,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:28:17,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:28:17,608 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:28:17,609 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:28:17,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:28:17,610 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:28:17,610 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:28:17,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:28:17,611 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:28:17,611 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:28:17,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:28:17,611 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:28:17,612 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:28:17,613 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:28:17,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:28:17,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:28:17,613 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:28:17,613 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:28:17,614 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:28:17,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:28:17,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:28:17,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:28:17,929 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:28:17,930 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:28:17,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-array.wvr.c [2023-08-24 09:28:19,041 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:28:19,257 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:28:19,257 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array.wvr.c [2023-08-24 09:28:19,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60aad05be/47453437e1ff461fb9a6b7891e468f8a/FLAG771098acc [2023-08-24 09:28:19,277 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60aad05be/47453437e1ff461fb9a6b7891e468f8a [2023-08-24 09:28:19,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:28:19,280 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:28:19,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:28:19,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:28:19,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:28:19,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18fb8de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19, skipping insertion in model container [2023-08-24 09:28:19,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,304 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:28:19,471 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array.wvr.c[2553,2566] [2023-08-24 09:28:19,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:28:19,484 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:28:19,514 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array.wvr.c[2553,2566] [2023-08-24 09:28:19,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:28:19,528 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:28:19,528 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:28:19,534 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:28:19,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19 WrapperNode [2023-08-24 09:28:19,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:28:19,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:28:19,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:28:19,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:28:19,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,558 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,586 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-08-24 09:28:19,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:28:19,588 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:28:19,588 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:28:19,588 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:28:19,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,611 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,611 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,631 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,632 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:28:19,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:28:19,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:28:19,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:28:19,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (1/1) ... [2023-08-24 09:28:19,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:28:19,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:19,678 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) [2023-08-24 09:28:19,699 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 [2023-08-24 09:28:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:28:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:28:19,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:28:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:28:19,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:28:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:28:19,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:28:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:28:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:28:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:28:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:28:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:28:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 09:28:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:28:19,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:28:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:28:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:28:19,722 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 09:28:19,841 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:28:19,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:28:20,150 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:28:20,224 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:28:20,224 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 09:28:20,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:28:20 BoogieIcfgContainer [2023-08-24 09:28:20,228 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:28:20,230 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:28:20,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:28:20,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:28:20,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:28:19" (1/3) ... [2023-08-24 09:28:20,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72142700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:28:20, skipping insertion in model container [2023-08-24 09:28:20,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:28:19" (2/3) ... [2023-08-24 09:28:20,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72142700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:28:20, skipping insertion in model container [2023-08-24 09:28:20,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:28:20" (3/3) ... [2023-08-24 09:28:20,236 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2023-08-24 09:28:20,253 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:28:20,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:28:20,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:28:20,338 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 09:28:20,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 148 transitions, 320 flow [2023-08-24 09:28:20,467 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-08-24 09:28:20,467 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:28:20,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 108. Up to 2 conditions per place. [2023-08-24 09:28:20,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 148 transitions, 320 flow [2023-08-24 09:28:20,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 135 transitions, 288 flow [2023-08-24 09:28:20,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:28:20,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 135 transitions, 288 flow [2023-08-24 09:28:20,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 135 transitions, 288 flow [2023-08-24 09:28:20,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2023-08-24 09:28:20,554 INFO L124 PetriNetUnfolderBase]: 12/135 cut-off events. [2023-08-24 09:28:20,555 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:28:20,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 12/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 108. Up to 2 conditions per place. [2023-08-24 09:28:20,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-24 09:28:24,975 INFO L134 LiptonReduction]: Checked pairs total: 1676 [2023-08-24 09:28:24,975 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-24 09:28:24,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:28:24,992 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=false, 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;@29b96da7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:28:24,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 09:28:24,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:28:24,999 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-08-24 09:28:24,999 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:28:24,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:25,000 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] [2023-08-24 09:28:25,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:25,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1009444864, now seen corresponding path program 1 times [2023-08-24 09:28:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439859580] [2023-08-24 09:28:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:25,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:25,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439859580] [2023-08-24 09:28:25,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439859580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:28:25,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:28:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:28:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49000064] [2023-08-24 09:28:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:28:25,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:28:25,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:28:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:28:25,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 280 [2023-08-24 09:28:25,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:25,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:25,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 280 [2023-08-24 09:28:25,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:25,823 INFO L124 PetriNetUnfolderBase]: 441/639 cut-off events. [2023-08-24 09:28:25,823 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-24 09:28:25,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 639 events. 441/639 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2251 event pairs, 76 based on Foata normal form. 2/394 useless extension candidates. Maximal degree in co-relation 803. Up to 465 conditions per place. [2023-08-24 09:28:25,829 INFO L140 encePairwiseOnDemand]: 274/280 looper letters, 46 selfloop transitions, 8 changer transitions 2/59 dead transitions. [2023-08-24 09:28:25,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 59 transitions, 281 flow [2023-08-24 09:28:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:28:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:28:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-24 09:28:25,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-08-24 09:28:25,843 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-24 09:28:25,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-24 09:28:25,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:25,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-24 09:28:25,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:25,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:25,855 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:25,857 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 4 states and 518 transitions. [2023-08-24 09:28:25,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 59 transitions, 281 flow [2023-08-24 09:28:25,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 59 transitions, 247 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 09:28:25,862 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 105 flow [2023-08-24 09:28:25,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-08-24 09:28:25,866 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-08-24 09:28:25,866 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 105 flow [2023-08-24 09:28:25,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:25,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:25,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:28:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:28:25,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:25,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash -802388598, now seen corresponding path program 1 times [2023-08-24 09:28:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:25,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552054815] [2023-08-24 09:28:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:26,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:26,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552054815] [2023-08-24 09:28:26,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552054815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:28:26,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:28:26,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:28:26,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705361017] [2023-08-24 09:28:26,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:28:26,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:28:26,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:28:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:28:26,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 280 [2023-08-24 09:28:26,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:26,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 280 [2023-08-24 09:28:26,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:26,138 INFO L124 PetriNetUnfolderBase]: 336/500 cut-off events. [2023-08-24 09:28:26,139 INFO L125 PetriNetUnfolderBase]: For 147/150 co-relation queries the response was YES. [2023-08-24 09:28:26,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 500 events. 336/500 cut-off events. For 147/150 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1748 event pairs, 170 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 1220. Up to 484 conditions per place. [2023-08-24 09:28:26,144 INFO L140 encePairwiseOnDemand]: 277/280 looper letters, 24 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-24 09:28:26,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 142 flow [2023-08-24 09:28:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:28:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:28:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-24 09:28:26,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2023-08-24 09:28:26,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-24 09:28:26,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-24 09:28:26,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:26,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-24 09:28:26,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,153 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 105 flow. Second operand 3 states and 342 transitions. [2023-08-24 09:28:26,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 142 flow [2023-08-24 09:28:26,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 138 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 09:28:26,156 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 94 flow [2023-08-24 09:28:26,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-24 09:28:26,158 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-24 09:28:26,159 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 94 flow [2023-08-24 09:28:26,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:26,166 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] [2023-08-24 09:28:26,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:28:26,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:26,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash 283968075, now seen corresponding path program 1 times [2023-08-24 09:28:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:26,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721152130] [2023-08-24 09:28:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:26,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:26,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:26,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721152130] [2023-08-24 09:28:26,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721152130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:26,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330898770] [2023-08-24 09:28:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:26,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:26,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:26,313 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) [2023-08-24 09:28:26,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 09:28:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:26,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:28:26,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:26,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:26,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330898770] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:26,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:28:26,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-24 09:28:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060167973] [2023-08-24 09:28:26,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:28:26,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:28:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:28:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:28:26,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:28:26,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:26,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:28:26,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:26,828 INFO L124 PetriNetUnfolderBase]: 404/586 cut-off events. [2023-08-24 09:28:26,828 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2023-08-24 09:28:26,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1461 conditions, 586 events. 404/586 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2019 event pairs, 94 based on Foata normal form. 44/628 useless extension candidates. Maximal degree in co-relation 1445. Up to 261 conditions per place. [2023-08-24 09:28:26,831 INFO L140 encePairwiseOnDemand]: 272/280 looper letters, 46 selfloop transitions, 13 changer transitions 0/60 dead transitions. [2023-08-24 09:28:26,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 310 flow [2023-08-24 09:28:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:28:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:28:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 837 transitions. [2023-08-24 09:28:26,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736607142857143 [2023-08-24 09:28:26,835 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 837 transitions. [2023-08-24 09:28:26,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 837 transitions. [2023-08-24 09:28:26,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:26,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 837 transitions. [2023-08-24 09:28:26,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.625) internal successors, (837), 8 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,842 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,842 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 94 flow. Second operand 8 states and 837 transitions. [2023-08-24 09:28:26,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 310 flow [2023-08-24 09:28:26,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 60 transitions, 295 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-24 09:28:26,844 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 146 flow [2023-08-24 09:28:26,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=146, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2023-08-24 09:28:26,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-24 09:28:26,845 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 146 flow [2023-08-24 09:28:26,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:26,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:26,846 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] [2023-08-24 09:28:26,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:27,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:27,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 782105989, now seen corresponding path program 1 times [2023-08-24 09:28:27,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:27,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002954078] [2023-08-24 09:28:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:27,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:27,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002954078] [2023-08-24 09:28:27,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002954078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040826176] [2023-08-24 09:28:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:27,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:27,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:27,178 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) [2023-08-24 09:28:27,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 09:28:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:27,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 09:28:27,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:27,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:27,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040826176] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:27,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:28:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 09:28:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584322352] [2023-08-24 09:28:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:28:27,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:28:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:28:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 09:28:27,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 280 [2023-08-24 09:28:27,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:27,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:27,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 280 [2023-08-24 09:28:27,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:27,461 INFO L124 PetriNetUnfolderBase]: 341/506 cut-off events. [2023-08-24 09:28:27,461 INFO L125 PetriNetUnfolderBase]: For 575/634 co-relation queries the response was YES. [2023-08-24 09:28:27,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 506 events. 341/506 cut-off events. For 575/634 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1699 event pairs, 85 based on Foata normal form. 67/561 useless extension candidates. Maximal degree in co-relation 1560. Up to 380 conditions per place. [2023-08-24 09:28:27,465 INFO L140 encePairwiseOnDemand]: 275/280 looper letters, 41 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-24 09:28:27,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 314 flow [2023-08-24 09:28:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:28:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:28:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-08-24 09:28:27,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40285714285714286 [2023-08-24 09:28:27,468 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-08-24 09:28:27,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-08-24 09:28:27,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:27,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-08-24 09:28:27,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:27,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:27,473 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:27,473 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 146 flow. Second operand 5 states and 564 transitions. [2023-08-24 09:28:27,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 314 flow [2023-08-24 09:28:27,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 291 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-24 09:28:27,483 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 152 flow [2023-08-24 09:28:27,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-24 09:28:27,485 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-24 09:28:27,485 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 152 flow [2023-08-24 09:28:27,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:27,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:27,486 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] [2023-08-24 09:28:27,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:27,692 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,SelfDestructingSolverStorable3 [2023-08-24 09:28:27,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:27,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1804398087, now seen corresponding path program 1 times [2023-08-24 09:28:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:27,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203151150] [2023-08-24 09:28:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:27,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:28,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203151150] [2023-08-24 09:28:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203151150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016689268] [2023-08-24 09:28:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:28,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:28,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:28,572 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) [2023-08-24 09:28:28,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 09:28:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:28,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 09:28:28,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:28:29,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-24 09:28:29,153 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:28:29,157 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:29,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-24 09:28:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:29,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:29,373 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_173 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_173) c_~A~0.base) .cse1))) (or (<= c_~min2~0 .cse0) (= c_~min1~0 .cse0)))) (or (= c_~min2~0 c_~min1~0) (forall ((v_ArrVal_173 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_173) c_~A~0.base) .cse1) c_~min2~0))))) is different from false [2023-08-24 09:28:29,404 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:29,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 99 [2023-08-24 09:28:29,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2023-08-24 09:28:29,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-08-24 09:28:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:29,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016689268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:28:29,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:28:29,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 26 [2023-08-24 09:28:29,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123071034] [2023-08-24 09:28:29,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:28:29,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 09:28:29,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 09:28:29,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=588, Unknown=1, NotChecked=50, Total=756 [2023-08-24 09:28:29,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 280 [2023-08-24 09:28:29,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 152 flow. Second operand has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:29,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:29,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 280 [2023-08-24 09:28:29,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:31,044 INFO L124 PetriNetUnfolderBase]: 843/1254 cut-off events. [2023-08-24 09:28:31,044 INFO L125 PetriNetUnfolderBase]: For 1170/1170 co-relation queries the response was YES. [2023-08-24 09:28:31,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1254 events. 843/1254 cut-off events. For 1170/1170 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4705 event pairs, 48 based on Foata normal form. 8/1262 useless extension candidates. Maximal degree in co-relation 3209. Up to 695 conditions per place. [2023-08-24 09:28:31,052 INFO L140 encePairwiseOnDemand]: 267/280 looper letters, 132 selfloop transitions, 59 changer transitions 7/198 dead transitions. [2023-08-24 09:28:31,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 198 transitions, 1182 flow [2023-08-24 09:28:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 09:28:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 09:28:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1597 transitions. [2023-08-24 09:28:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.300187969924812 [2023-08-24 09:28:31,058 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1597 transitions. [2023-08-24 09:28:31,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1597 transitions. [2023-08-24 09:28:31,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:31,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1597 transitions. [2023-08-24 09:28:31,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.05263157894737) internal successors, (1597), 19 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:31,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:31,069 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:31,069 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 152 flow. Second operand 19 states and 1597 transitions. [2023-08-24 09:28:31,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 198 transitions, 1182 flow [2023-08-24 09:28:31,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 198 transitions, 1157 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-24 09:28:31,080 INFO L231 Difference]: Finished difference. Result has 65 places, 87 transitions, 615 flow [2023-08-24 09:28:31,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=615, PETRI_PLACES=65, PETRI_TRANSITIONS=87} [2023-08-24 09:28:31,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2023-08-24 09:28:31,081 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 87 transitions, 615 flow [2023-08-24 09:28:31,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:31,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:31,082 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] [2023-08-24 09:28:31,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:31,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:31,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 184922273, now seen corresponding path program 2 times [2023-08-24 09:28:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:31,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646544414] [2023-08-24 09:28:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:31,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:31,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646544414] [2023-08-24 09:28:31,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646544414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701680512] [2023-08-24 09:28:31,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:28:31,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:31,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:31,877 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) [2023-08-24 09:28:31,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 09:28:31,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:28:31,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:28:31,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 09:28:31,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:32,336 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:32,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2023-08-24 09:28:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:32,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:32,688 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:32,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-24 09:28:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701680512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:28:32,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:28:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2023-08-24 09:28:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179713382] [2023-08-24 09:28:32,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:28:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:28:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:28:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:28:32,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 280 [2023-08-24 09:28:32,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 87 transitions, 615 flow. Second operand has 25 states, 25 states have (on average 81.64) internal successors, (2041), 25 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:32,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:32,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 280 [2023-08-24 09:28:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:34,381 INFO L124 PetriNetUnfolderBase]: 1225/1825 cut-off events. [2023-08-24 09:28:34,381 INFO L125 PetriNetUnfolderBase]: For 4635/4635 co-relation queries the response was YES. [2023-08-24 09:28:34,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 1825 events. 1225/1825 cut-off events. For 4635/4635 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7367 event pairs, 144 based on Foata normal form. 2/1827 useless extension candidates. Maximal degree in co-relation 7665. Up to 1135 conditions per place. [2023-08-24 09:28:34,397 INFO L140 encePairwiseOnDemand]: 266/280 looper letters, 139 selfloop transitions, 103 changer transitions 9/251 dead transitions. [2023-08-24 09:28:34,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 251 transitions, 1990 flow [2023-08-24 09:28:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 09:28:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 09:28:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2162 transitions. [2023-08-24 09:28:34,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30885714285714283 [2023-08-24 09:28:34,405 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2162 transitions. [2023-08-24 09:28:34,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2162 transitions. [2023-08-24 09:28:34,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:34,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2162 transitions. [2023-08-24 09:28:34,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 86.48) internal successors, (2162), 25 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:34,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 280.0) internal successors, (7280), 26 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:34,422 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 280.0) internal successors, (7280), 26 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:34,422 INFO L175 Difference]: Start difference. First operand has 65 places, 87 transitions, 615 flow. Second operand 25 states and 2162 transitions. [2023-08-24 09:28:34,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 251 transitions, 1990 flow [2023-08-24 09:28:34,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 251 transitions, 1868 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-08-24 09:28:34,449 INFO L231 Difference]: Finished difference. Result has 99 places, 153 transitions, 1386 flow [2023-08-24 09:28:34,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1386, PETRI_PLACES=99, PETRI_TRANSITIONS=153} [2023-08-24 09:28:34,451 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2023-08-24 09:28:34,454 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 153 transitions, 1386 flow [2023-08-24 09:28:34,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.64) internal successors, (2041), 25 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:34,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:34,455 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] [2023-08-24 09:28:34,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:34,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:34,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:34,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 583003933, now seen corresponding path program 3 times [2023-08-24 09:28:34,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:34,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245566683] [2023-08-24 09:28:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:35,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245566683] [2023-08-24 09:28:35,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245566683] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83111384] [2023-08-24 09:28:35,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:28:35,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:35,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:35,564 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) [2023-08-24 09:28:35,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 09:28:35,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:28:35,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:28:35,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 09:28:35,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:36,095 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:36,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-08-24 09:28:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:36,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:36,500 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:36,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-24 09:28:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:36,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83111384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:28:36,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:28:36,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-08-24 09:28:36,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157756187] [2023-08-24 09:28:36,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:28:36,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:28:36,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:36,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:28:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:28:36,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 280 [2023-08-24 09:28:36,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 153 transitions, 1386 flow. Second operand has 32 states, 32 states have (on average 70.90625) internal successors, (2269), 32 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:36,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:36,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 280 [2023-08-24 09:28:36,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:39,616 INFO L124 PetriNetUnfolderBase]: 1744/2595 cut-off events. [2023-08-24 09:28:39,616 INFO L125 PetriNetUnfolderBase]: For 13858/13858 co-relation queries the response was YES. [2023-08-24 09:28:39,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13410 conditions, 2595 events. 1744/2595 cut-off events. For 13858/13858 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11305 event pairs, 272 based on Foata normal form. 3/2598 useless extension candidates. Maximal degree in co-relation 13366. Up to 1812 conditions per place. [2023-08-24 09:28:39,645 INFO L140 encePairwiseOnDemand]: 267/280 looper letters, 181 selfloop transitions, 174 changer transitions 12/367 dead transitions. [2023-08-24 09:28:39,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 367 transitions, 3561 flow [2023-08-24 09:28:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 09:28:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 09:28:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3097 transitions. [2023-08-24 09:28:39,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697735191637631 [2023-08-24 09:28:39,655 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3097 transitions. [2023-08-24 09:28:39,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3097 transitions. [2023-08-24 09:28:39,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:39,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3097 transitions. [2023-08-24 09:28:39,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 75.53658536585365) internal successors, (3097), 41 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:39,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 280.0) internal successors, (11760), 42 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:39,678 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 280.0) internal successors, (11760), 42 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:39,678 INFO L175 Difference]: Start difference. First operand has 99 places, 153 transitions, 1386 flow. Second operand 41 states and 3097 transitions. [2023-08-24 09:28:39,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 367 transitions, 3561 flow [2023-08-24 09:28:39,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 367 transitions, 3403 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-24 09:28:39,724 INFO L231 Difference]: Finished difference. Result has 152 places, 249 transitions, 2674 flow [2023-08-24 09:28:39,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2674, PETRI_PLACES=152, PETRI_TRANSITIONS=249} [2023-08-24 09:28:39,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2023-08-24 09:28:39,725 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 249 transitions, 2674 flow [2023-08-24 09:28:39,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 70.90625) internal successors, (2269), 32 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:39,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:39,726 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] [2023-08-24 09:28:39,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:39,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:39,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash 870606891, now seen corresponding path program 4 times [2023-08-24 09:28:39,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:39,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876813712] [2023-08-24 09:28:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:39,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:40,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876813712] [2023-08-24 09:28:40,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876813712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:40,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982305363] [2023-08-24 09:28:40,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:28:40,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:40,525 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) [2023-08-24 09:28:40,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 09:28:40,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:28:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:28:40,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 09:28:40,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:40,932 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:28:40,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 63 [2023-08-24 09:28:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:41,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:41,165 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:41,165 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-24 09:28:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:41,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982305363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:28:41,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:28:41,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2023-08-24 09:28:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480128587] [2023-08-24 09:28:41,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:28:41,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:28:41,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:28:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-08-24 09:28:41,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 280 [2023-08-24 09:28:41,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 249 transitions, 2674 flow. Second operand has 27 states, 27 states have (on average 81.29629629629629) internal successors, (2195), 27 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:41,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:41,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 280 [2023-08-24 09:28:41,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:43,001 INFO L124 PetriNetUnfolderBase]: 1920/2873 cut-off events. [2023-08-24 09:28:43,002 INFO L125 PetriNetUnfolderBase]: For 22764/22764 co-relation queries the response was YES. [2023-08-24 09:28:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17304 conditions, 2873 events. 1920/2873 cut-off events. For 22764/22764 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12882 event pairs, 351 based on Foata normal form. 3/2876 useless extension candidates. Maximal degree in co-relation 17242. Up to 2438 conditions per place. [2023-08-24 09:28:43,042 INFO L140 encePairwiseOnDemand]: 267/280 looper letters, 216 selfloop transitions, 154 changer transitions 13/383 dead transitions. [2023-08-24 09:28:43,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 383 transitions, 4597 flow [2023-08-24 09:28:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 09:28:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 09:28:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1780 transitions. [2023-08-24 09:28:43,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30272108843537415 [2023-08-24 09:28:43,047 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1780 transitions. [2023-08-24 09:28:43,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1780 transitions. [2023-08-24 09:28:43,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:43,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1780 transitions. [2023-08-24 09:28:43,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 84.76190476190476) internal successors, (1780), 21 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:43,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 280.0) internal successors, (6160), 22 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:43,057 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 280.0) internal successors, (6160), 22 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:43,058 INFO L175 Difference]: Start difference. First operand has 152 places, 249 transitions, 2674 flow. Second operand 21 states and 1780 transitions. [2023-08-24 09:28:43,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 383 transitions, 4597 flow [2023-08-24 09:28:43,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 383 transitions, 3933 flow, removed 230 selfloop flow, removed 17 redundant places. [2023-08-24 09:28:43,149 INFO L231 Difference]: Finished difference. Result has 167 places, 328 transitions, 3462 flow [2023-08-24 09:28:43,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3462, PETRI_PLACES=167, PETRI_TRANSITIONS=328} [2023-08-24 09:28:43,150 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2023-08-24 09:28:43,150 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 328 transitions, 3462 flow [2023-08-24 09:28:43,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 81.29629629629629) internal successors, (2195), 27 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:43,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:43,151 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] [2023-08-24 09:28:43,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:43,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:43,357 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:43,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:43,357 INFO L85 PathProgramCache]: Analyzing trace with hash 735028581, now seen corresponding path program 5 times [2023-08-24 09:28:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:43,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435850125] [2023-08-24 09:28:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:43,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435850125] [2023-08-24 09:28:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435850125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:43,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079098232] [2023-08-24 09:28:43,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:28:43,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:43,957 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) [2023-08-24 09:28:43,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 09:28:44,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:28:44,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:28:44,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 09:28:44,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:44,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-24 09:28:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:44,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:44,565 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:44,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-24 09:28:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:44,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079098232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:28:44,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:28:44,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2023-08-24 09:28:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325688518] [2023-08-24 09:28:44,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:28:44,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:28:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:28:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:28:44,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 280 [2023-08-24 09:28:44,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 328 transitions, 3462 flow. Second operand has 25 states, 25 states have (on average 81.48) internal successors, (2037), 25 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:44,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:44,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 280 [2023-08-24 09:28:44,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:46,092 INFO L124 PetriNetUnfolderBase]: 1960/2936 cut-off events. [2023-08-24 09:28:46,092 INFO L125 PetriNetUnfolderBase]: For 22619/22619 co-relation queries the response was YES. [2023-08-24 09:28:46,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17657 conditions, 2936 events. 1960/2936 cut-off events. For 22619/22619 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13286 event pairs, 368 based on Foata normal form. 2/2938 useless extension candidates. Maximal degree in co-relation 17583. Up to 2578 conditions per place. [2023-08-24 09:28:46,132 INFO L140 encePairwiseOnDemand]: 267/280 looper letters, 291 selfloop transitions, 117 changer transitions 3/411 dead transitions. [2023-08-24 09:28:46,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 411 transitions, 4873 flow [2023-08-24 09:28:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 09:28:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 09:28:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1717 transitions. [2023-08-24 09:28:46,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30660714285714286 [2023-08-24 09:28:46,136 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1717 transitions. [2023-08-24 09:28:46,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1717 transitions. [2023-08-24 09:28:46,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:46,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1717 transitions. [2023-08-24 09:28:46,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.85) internal successors, (1717), 20 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:46,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 280.0) internal successors, (5880), 21 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:46,145 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 280.0) internal successors, (5880), 21 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:46,145 INFO L175 Difference]: Start difference. First operand has 167 places, 328 transitions, 3462 flow. Second operand 20 states and 1717 transitions. [2023-08-24 09:28:46,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 411 transitions, 4873 flow [2023-08-24 09:28:46,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 411 transitions, 4510 flow, removed 150 selfloop flow, removed 5 redundant places. [2023-08-24 09:28:46,265 INFO L231 Difference]: Finished difference. Result has 187 places, 351 transitions, 3674 flow [2023-08-24 09:28:46,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3674, PETRI_PLACES=187, PETRI_TRANSITIONS=351} [2023-08-24 09:28:46,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2023-08-24 09:28:46,267 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 351 transitions, 3674 flow [2023-08-24 09:28:46,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.48) internal successors, (2037), 25 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:46,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:46,268 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] [2023-08-24 09:28:46,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:46,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:46,474 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:46,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1087686693, now seen corresponding path program 6 times [2023-08-24 09:28:46,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:46,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484316135] [2023-08-24 09:28:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:46,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:46,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484316135] [2023-08-24 09:28:46,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484316135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947446792] [2023-08-24 09:28:46,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:28:46,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:46,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:46,989 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) [2023-08-24 09:28:46,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 09:28:47,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:28:47,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:28:47,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 09:28:47,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:47,401 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:47,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-08-24 09:28:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:47,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:47,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:47,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2023-08-24 09:28:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:28:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947446792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:28:47,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:28:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2023-08-24 09:28:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175565151] [2023-08-24 09:28:47,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:28:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:28:47,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:28:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-08-24 09:28:47,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 280 [2023-08-24 09:28:47,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 351 transitions, 3674 flow. Second operand has 26 states, 26 states have (on average 81.34615384615384) internal successors, (2115), 26 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:47,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:47,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 280 [2023-08-24 09:28:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:49,537 INFO L124 PetriNetUnfolderBase]: 2065/3131 cut-off events. [2023-08-24 09:28:49,537 INFO L125 PetriNetUnfolderBase]: For 26291/26291 co-relation queries the response was YES. [2023-08-24 09:28:49,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19278 conditions, 3131 events. 2065/3131 cut-off events. For 26291/26291 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14704 event pairs, 374 based on Foata normal form. 2/3127 useless extension candidates. Maximal degree in co-relation 19199. Up to 2700 conditions per place. [2023-08-24 09:28:49,569 INFO L140 encePairwiseOnDemand]: 268/280 looper letters, 282 selfloop transitions, 160 changer transitions 13/455 dead transitions. [2023-08-24 09:28:49,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 455 transitions, 5424 flow [2023-08-24 09:28:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 09:28:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 09:28:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1630 transitions. [2023-08-24 09:28:49,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30639097744360905 [2023-08-24 09:28:49,573 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1630 transitions. [2023-08-24 09:28:49,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1630 transitions. [2023-08-24 09:28:49,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:49,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1630 transitions. [2023-08-24 09:28:49,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.78947368421052) internal successors, (1630), 19 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:49,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:49,581 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:49,581 INFO L175 Difference]: Start difference. First operand has 187 places, 351 transitions, 3674 flow. Second operand 19 states and 1630 transitions. [2023-08-24 09:28:49,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 455 transitions, 5424 flow [2023-08-24 09:28:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 455 transitions, 5206 flow, removed 35 selfloop flow, removed 11 redundant places. [2023-08-24 09:28:49,706 INFO L231 Difference]: Finished difference. Result has 203 places, 393 transitions, 4530 flow [2023-08-24 09:28:49,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4530, PETRI_PLACES=203, PETRI_TRANSITIONS=393} [2023-08-24 09:28:49,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2023-08-24 09:28:49,707 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 393 transitions, 4530 flow [2023-08-24 09:28:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 81.34615384615384) internal successors, (2115), 26 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:49,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:49,708 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] [2023-08-24 09:28:49,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 09:28:49,913 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,SelfDestructingSolverStorable9 [2023-08-24 09:28:49,914 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:49,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -737468569, now seen corresponding path program 7 times [2023-08-24 09:28:49,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:49,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242621206] [2023-08-24 09:28:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:49,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:50,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:50,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242621206] [2023-08-24 09:28:50,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242621206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:50,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496527764] [2023-08-24 09:28:50,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:28:50,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:50,655 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) [2023-08-24 09:28:50,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 09:28:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:50,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:28:50,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:51,074 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:28:51,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-08-24 09:28:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:51,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:28:51,279 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:51,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2023-08-24 09:28:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496527764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:28:51,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:28:51,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-24 09:28:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677286244] [2023-08-24 09:28:51,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:28:51,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:28:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:28:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:28:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:28:51,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 280 [2023-08-24 09:28:51,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 393 transitions, 4530 flow. Second operand has 25 states, 25 states have (on average 75.4) internal successors, (1885), 25 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:51,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:28:51,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 280 [2023-08-24 09:28:51,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:28:52,472 INFO L124 PetriNetUnfolderBase]: 2256/3491 cut-off events. [2023-08-24 09:28:52,473 INFO L125 PetriNetUnfolderBase]: For 33330/33363 co-relation queries the response was YES. [2023-08-24 09:28:52,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22505 conditions, 3491 events. 2256/3491 cut-off events. For 33330/33363 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17919 event pairs, 385 based on Foata normal form. 30/3489 useless extension candidates. Maximal degree in co-relation 22416. Up to 2693 conditions per place. [2023-08-24 09:28:52,516 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 300 selfloop transitions, 173 changer transitions 1/486 dead transitions. [2023-08-24 09:28:52,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 486 transitions, 6424 flow [2023-08-24 09:28:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:28:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:28:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1050 transitions. [2023-08-24 09:28:52,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28846153846153844 [2023-08-24 09:28:52,520 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1050 transitions. [2023-08-24 09:28:52,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1050 transitions. [2023-08-24 09:28:52,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:28:52,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1050 transitions. [2023-08-24 09:28:52,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.76923076923077) internal successors, (1050), 13 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:52,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 280.0) internal successors, (3920), 14 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:52,526 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 280.0) internal successors, (3920), 14 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:52,526 INFO L175 Difference]: Start difference. First operand has 203 places, 393 transitions, 4530 flow. Second operand 13 states and 1050 transitions. [2023-08-24 09:28:52,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 486 transitions, 6424 flow [2023-08-24 09:28:52,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 486 transitions, 5934 flow, removed 212 selfloop flow, removed 3 redundant places. [2023-08-24 09:28:52,719 INFO L231 Difference]: Finished difference. Result has 216 places, 439 transitions, 5187 flow [2023-08-24 09:28:52,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5187, PETRI_PLACES=216, PETRI_TRANSITIONS=439} [2023-08-24 09:28:52,720 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2023-08-24 09:28:52,720 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 439 transitions, 5187 flow [2023-08-24 09:28:52,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.4) internal successors, (1885), 25 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:28:52,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:28:52,721 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] [2023-08-24 09:28:52,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 09:28:52,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:52,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:28:52,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:28:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash -650677673, now seen corresponding path program 8 times [2023-08-24 09:28:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:28:52,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69619194] [2023-08-24 09:28:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:28:52,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:28:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:28:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:53,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:28:53,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69619194] [2023-08-24 09:28:53,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69619194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:28:53,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253439351] [2023-08-24 09:28:53,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:28:53,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:28:53,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:28:53,658 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) [2023-08-24 09:28:53,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 09:28:53,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:28:53,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:28:53,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 09:28:53,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:28:53,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:28:53,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:28:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:28:54,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-24 09:28:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:28:54,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-24 09:28:54,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:28:54,250 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2023-08-24 09:28:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:28:54,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:06,984 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:29:09,519 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:09,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2023-08-24 09:29:09,545 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:09,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 178 [2023-08-24 09:29:09,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 124 [2023-08-24 09:29:09,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 100 [2023-08-24 09:29:09,579 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:09,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 69 [2023-08-24 09:29:09,861 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:29:09,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 1 [2023-08-24 09:29:09,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:09,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 63 [2023-08-24 09:29:09,875 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:09,876 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:09,883 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:09,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 64 [2023-08-24 09:29:09,892 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:09,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2023-08-24 09:29:09,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:09,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2023-08-24 09:29:09,920 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:09,921 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:09,930 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:09,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-08-24 09:29:09,944 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:09,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-24 09:29:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253439351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:09,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-08-24 09:29:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657393809] [2023-08-24 09:29:09,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:09,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:29:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:09,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:29:09,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=555, Unknown=25, NotChecked=0, Total=702 [2023-08-24 09:29:09,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 280 [2023-08-24 09:29:09,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 439 transitions, 5187 flow. Second operand has 27 states, 27 states have (on average 79.11111111111111) internal successors, (2136), 27 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:09,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:09,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 280 [2023-08-24 09:29:09,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:17,751 INFO L124 PetriNetUnfolderBase]: 2405/3725 cut-off events. [2023-08-24 09:29:17,751 INFO L125 PetriNetUnfolderBase]: For 34785/34807 co-relation queries the response was YES. [2023-08-24 09:29:17,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24643 conditions, 3725 events. 2405/3725 cut-off events. For 34785/34807 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19548 event pairs, 317 based on Foata normal form. 20/3702 useless extension candidates. Maximal degree in co-relation 24549. Up to 2651 conditions per place. [2023-08-24 09:29:17,790 INFO L140 encePairwiseOnDemand]: 270/280 looper letters, 330 selfloop transitions, 158 changer transitions 4/504 dead transitions. [2023-08-24 09:29:17,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 504 transitions, 6665 flow [2023-08-24 09:29:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:29:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:29:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 940 transitions. [2023-08-24 09:29:17,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051948051948052 [2023-08-24 09:29:17,793 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 940 transitions. [2023-08-24 09:29:17,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 940 transitions. [2023-08-24 09:29:17,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:17,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 940 transitions. [2023-08-24 09:29:17,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.45454545454545) internal successors, (940), 11 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:17,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 280.0) internal successors, (3360), 12 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:17,798 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 280.0) internal successors, (3360), 12 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:17,798 INFO L175 Difference]: Start difference. First operand has 216 places, 439 transitions, 5187 flow. Second operand 11 states and 940 transitions. [2023-08-24 09:29:17,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 504 transitions, 6665 flow [2023-08-24 09:29:17,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 504 transitions, 6513 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-24 09:29:18,006 INFO L231 Difference]: Finished difference. Result has 225 places, 458 transitions, 5754 flow [2023-08-24 09:29:18,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=5036, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5754, PETRI_PLACES=225, PETRI_TRANSITIONS=458} [2023-08-24 09:29:18,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2023-08-24 09:29:18,007 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 458 transitions, 5754 flow [2023-08-24 09:29:18,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 79.11111111111111) internal successors, (2136), 27 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:18,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:18,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:18,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:18,214 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,SelfDestructingSolverStorable11 [2023-08-24 09:29:18,214 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:18,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1729518910, now seen corresponding path program 9 times [2023-08-24 09:29:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370661915] [2023-08-24 09:29:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:18,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:18,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370661915] [2023-08-24 09:29:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370661915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156754967] [2023-08-24 09:29:18,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:29:18,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:18,305 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) [2023-08-24 09:29:18,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 09:29:18,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:29:18,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:18,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:29:18,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:18,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:18,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156754967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:18,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:18,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 09:29:18,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273151660] [2023-08-24 09:29:18,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:18,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:29:18,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:29:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:29:18,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 280 [2023-08-24 09:29:18,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 458 transitions, 5754 flow. Second operand has 14 states, 14 states have (on average 108.92857142857143) internal successors, (1525), 14 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:18,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:18,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 280 [2023-08-24 09:29:18,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:19,337 INFO L124 PetriNetUnfolderBase]: 2691/4118 cut-off events. [2023-08-24 09:29:19,337 INFO L125 PetriNetUnfolderBase]: For 53225/53412 co-relation queries the response was YES. [2023-08-24 09:29:19,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29583 conditions, 4118 events. 2691/4118 cut-off events. For 53225/53412 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22116 event pairs, 805 based on Foata normal form. 130/4107 useless extension candidates. Maximal degree in co-relation 29483. Up to 3052 conditions per place. [2023-08-24 09:29:19,381 INFO L140 encePairwiseOnDemand]: 274/280 looper letters, 461 selfloop transitions, 52 changer transitions 0/546 dead transitions. [2023-08-24 09:29:19,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 546 transitions, 7660 flow [2023-08-24 09:29:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:29:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:29:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 913 transitions. [2023-08-24 09:29:19,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075892857142857 [2023-08-24 09:29:19,383 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 913 transitions. [2023-08-24 09:29:19,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 913 transitions. [2023-08-24 09:29:19,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:19,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 913 transitions. [2023-08-24 09:29:19,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.125) internal successors, (913), 8 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:19,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:19,387 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:19,388 INFO L175 Difference]: Start difference. First operand has 225 places, 458 transitions, 5754 flow. Second operand 8 states and 913 transitions. [2023-08-24 09:29:19,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 546 transitions, 7660 flow [2023-08-24 09:29:19,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 546 transitions, 7525 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-24 09:29:19,588 INFO L231 Difference]: Finished difference. Result has 230 places, 460 transitions, 5889 flow [2023-08-24 09:29:19,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=5578, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5889, PETRI_PLACES=230, PETRI_TRANSITIONS=460} [2023-08-24 09:29:19,589 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2023-08-24 09:29:19,589 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 460 transitions, 5889 flow [2023-08-24 09:29:19,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.92857142857143) internal successors, (1525), 14 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:19,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:19,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:19,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:19,790 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,SelfDestructingSolverStorable12 [2023-08-24 09:29:19,790 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:19,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1378138305, now seen corresponding path program 10 times [2023-08-24 09:29:19,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:19,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617128938] [2023-08-24 09:29:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:19,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:19,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:19,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617128938] [2023-08-24 09:29:19,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617128938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:19,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524555121] [2023-08-24 09:29:19,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:29:19,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:19,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:19,897 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) [2023-08-24 09:29:19,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 09:29:19,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:29:19,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:19,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:29:19,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:20,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524555121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:20,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2023-08-24 09:29:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876666225] [2023-08-24 09:29:20,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:20,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:29:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:29:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:29:20,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 280 [2023-08-24 09:29:20,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 460 transitions, 5889 flow. Second operand has 19 states, 19 states have (on average 96.6842105263158) internal successors, (1837), 19 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:20,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:20,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 280 [2023-08-24 09:29:20,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:21,957 INFO L124 PetriNetUnfolderBase]: 3037/4629 cut-off events. [2023-08-24 09:29:21,957 INFO L125 PetriNetUnfolderBase]: For 62214/62214 co-relation queries the response was YES. [2023-08-24 09:29:21,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33202 conditions, 4629 events. 3037/4629 cut-off events. For 62214/62214 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24161 event pairs, 468 based on Foata normal form. 320/4949 useless extension candidates. Maximal degree in co-relation 33101. Up to 1772 conditions per place. [2023-08-24 09:29:22,004 INFO L140 encePairwiseOnDemand]: 268/280 looper letters, 551 selfloop transitions, 198 changer transitions 16/765 dead transitions. [2023-08-24 09:29:22,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 765 transitions, 10725 flow [2023-08-24 09:29:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 09:29:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 09:29:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3152 transitions. [2023-08-24 09:29:22,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631336405529954 [2023-08-24 09:29:22,009 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3152 transitions. [2023-08-24 09:29:22,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3152 transitions. [2023-08-24 09:29:22,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:22,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3152 transitions. [2023-08-24 09:29:22,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 101.6774193548387) internal successors, (3152), 31 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:22,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 280.0) internal successors, (8960), 32 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:22,024 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 280.0) internal successors, (8960), 32 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:22,024 INFO L175 Difference]: Start difference. First operand has 230 places, 460 transitions, 5889 flow. Second operand 31 states and 3152 transitions. [2023-08-24 09:29:22,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 765 transitions, 10725 flow [2023-08-24 09:29:22,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 765 transitions, 10653 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-24 09:29:22,275 INFO L231 Difference]: Finished difference. Result has 273 places, 508 transitions, 7422 flow [2023-08-24 09:29:22,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7422, PETRI_PLACES=273, PETRI_TRANSITIONS=508} [2023-08-24 09:29:22,276 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2023-08-24 09:29:22,276 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 508 transitions, 7422 flow [2023-08-24 09:29:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 96.6842105263158) internal successors, (1837), 19 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:22,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:22,277 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] [2023-08-24 09:29:22,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 09:29:22,477 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,SelfDestructingSolverStorable13 [2023-08-24 09:29:22,478 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:22,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:22,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1284205247, now seen corresponding path program 1 times [2023-08-24 09:29:22,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:22,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739083665] [2023-08-24 09:29:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:22,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:22,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739083665] [2023-08-24 09:29:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739083665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828222770] [2023-08-24 09:29:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:22,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:22,590 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) [2023-08-24 09:29:22,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 09:29:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:22,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:29:22,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:22,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:22,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828222770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:22,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:22,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:29:22,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815630994] [2023-08-24 09:29:22,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:22,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:29:22,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:29:22,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:29:22,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:22,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 508 transitions, 7422 flow. Second operand has 16 states, 16 states have (on average 100.375) internal successors, (1606), 16 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:22,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:22,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:22,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:24,034 INFO L124 PetriNetUnfolderBase]: 2927/4462 cut-off events. [2023-08-24 09:29:24,034 INFO L125 PetriNetUnfolderBase]: For 92959/92969 co-relation queries the response was YES. [2023-08-24 09:29:24,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37198 conditions, 4462 events. 2927/4462 cut-off events. For 92959/92969 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23341 event pairs, 699 based on Foata normal form. 56/4503 useless extension candidates. Maximal degree in co-relation 37080. Up to 1432 conditions per place. [2023-08-24 09:29:24,163 INFO L140 encePairwiseOnDemand]: 272/280 looper letters, 434 selfloop transitions, 95 changer transitions 53/600 dead transitions. [2023-08-24 09:29:24,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 600 transitions, 9791 flow [2023-08-24 09:29:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:29:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:29:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1078 transitions. [2023-08-24 09:29:24,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385 [2023-08-24 09:29:24,165 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1078 transitions. [2023-08-24 09:29:24,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1078 transitions. [2023-08-24 09:29:24,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:24,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1078 transitions. [2023-08-24 09:29:24,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 107.8) internal successors, (1078), 10 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:24,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:24,170 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:24,170 INFO L175 Difference]: Start difference. First operand has 273 places, 508 transitions, 7422 flow. Second operand 10 states and 1078 transitions. [2023-08-24 09:29:24,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 600 transitions, 9791 flow [2023-08-24 09:29:24,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 600 transitions, 8643 flow, removed 476 selfloop flow, removed 11 redundant places. [2023-08-24 09:29:24,699 INFO L231 Difference]: Finished difference. Result has 275 places, 479 transitions, 6598 flow [2023-08-24 09:29:24,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6598, PETRI_PLACES=275, PETRI_TRANSITIONS=479} [2023-08-24 09:29:24,699 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2023-08-24 09:29:24,699 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 479 transitions, 6598 flow [2023-08-24 09:29:24,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.375) internal successors, (1606), 16 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:24,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:24,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:24,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:24,900 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,SelfDestructingSolverStorable14 [2023-08-24 09:29:24,900 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:24,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:24,901 INFO L85 PathProgramCache]: Analyzing trace with hash 82485581, now seen corresponding path program 11 times [2023-08-24 09:29:24,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:24,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372169834] [2023-08-24 09:29:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:25,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:25,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372169834] [2023-08-24 09:29:25,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372169834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:25,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539831026] [2023-08-24 09:29:25,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:29:25,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:25,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:25,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:25,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 09:29:25,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:29:25,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:25,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:29:25,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:25,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539831026] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:25,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:25,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 09:29:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836891611] [2023-08-24 09:29:25,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 09:29:25,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 09:29:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:29:25,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 280 [2023-08-24 09:29:25,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 479 transitions, 6598 flow. Second operand has 15 states, 15 states have (on average 105.4) internal successors, (1581), 15 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:25,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:25,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 280 [2023-08-24 09:29:25,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:26,314 INFO L124 PetriNetUnfolderBase]: 2293/3628 cut-off events. [2023-08-24 09:29:26,314 INFO L125 PetriNetUnfolderBase]: For 65833/66074 co-relation queries the response was YES. [2023-08-24 09:29:26,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28021 conditions, 3628 events. 2293/3628 cut-off events. For 65833/66074 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20251 event pairs, 462 based on Foata normal form. 272/3843 useless extension candidates. Maximal degree in co-relation 27903. Up to 1374 conditions per place. [2023-08-24 09:29:26,353 INFO L140 encePairwiseOnDemand]: 274/280 looper letters, 349 selfloop transitions, 49 changer transitions 77/508 dead transitions. [2023-08-24 09:29:26,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 508 transitions, 7840 flow [2023-08-24 09:29:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:29:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:29:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 777 transitions. [2023-08-24 09:29:26,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2023-08-24 09:29:26,355 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 777 transitions. [2023-08-24 09:29:26,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 777 transitions. [2023-08-24 09:29:26,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:26,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 777 transitions. [2023-08-24 09:29:26,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 111.0) internal successors, (777), 7 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) [2023-08-24 09:29:26,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 280.0) internal successors, (2240), 8 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:26,357 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 280.0) internal successors, (2240), 8 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:26,357 INFO L175 Difference]: Start difference. First operand has 275 places, 479 transitions, 6598 flow. Second operand 7 states and 777 transitions. [2023-08-24 09:29:26,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 508 transitions, 7840 flow [2023-08-24 09:29:26,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 508 transitions, 7603 flow, removed 104 selfloop flow, removed 10 redundant places. [2023-08-24 09:29:26,710 INFO L231 Difference]: Finished difference. Result has 268 places, 390 transitions, 5177 flow [2023-08-24 09:29:26,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5177, PETRI_PLACES=268, PETRI_TRANSITIONS=390} [2023-08-24 09:29:26,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2023-08-24 09:29:26,711 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 390 transitions, 5177 flow [2023-08-24 09:29:26,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 105.4) internal successors, (1581), 15 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:26,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:26,712 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] [2023-08-24 09:29:26,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:26,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:26,917 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:26,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1470765599, now seen corresponding path program 2 times [2023-08-24 09:29:26,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:26,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9501748] [2023-08-24 09:29:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:26,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:27,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:27,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9501748] [2023-08-24 09:29:27,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9501748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:27,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178729544] [2023-08-24 09:29:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:29:27,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:27,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:27,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:27,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 09:29:27,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:29:27,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:27,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:29:27,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:27,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:27,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178729544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:27,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:27,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:29:27,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684667273] [2023-08-24 09:29:27,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:27,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:29:27,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:29:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:29:27,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:27,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 390 transitions, 5177 flow. Second operand has 16 states, 16 states have (on average 100.3125) internal successors, (1605), 16 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:27,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:27,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:27,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:27,963 INFO L124 PetriNetUnfolderBase]: 1471/2382 cut-off events. [2023-08-24 09:29:27,963 INFO L125 PetriNetUnfolderBase]: For 42950/42954 co-relation queries the response was YES. [2023-08-24 09:29:27,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18018 conditions, 2382 events. 1471/2382 cut-off events. For 42950/42954 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12100 event pairs, 369 based on Foata normal form. 206/2582 useless extension candidates. Maximal degree in co-relation 17916. Up to 1432 conditions per place. [2023-08-24 09:29:27,982 INFO L140 encePairwiseOnDemand]: 273/280 looper letters, 218 selfloop transitions, 3 changer transitions 110/337 dead transitions. [2023-08-24 09:29:27,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 337 transitions, 4832 flow [2023-08-24 09:29:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:29:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:29:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 847 transitions. [2023-08-24 09:29:27,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2023-08-24 09:29:27,983 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 847 transitions. [2023-08-24 09:29:27,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 847 transitions. [2023-08-24 09:29:27,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:27,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 847 transitions. [2023-08-24 09:29:27,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.875) internal successors, (847), 8 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) [2023-08-24 09:29:27,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:27,987 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:27,987 INFO L175 Difference]: Start difference. First operand has 268 places, 390 transitions, 5177 flow. Second operand 8 states and 847 transitions. [2023-08-24 09:29:27,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 337 transitions, 4832 flow [2023-08-24 09:29:28,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 337 transitions, 4297 flow, removed 115 selfloop flow, removed 34 redundant places. [2023-08-24 09:29:28,135 INFO L231 Difference]: Finished difference. Result has 231 places, 227 transitions, 2338 flow [2023-08-24 09:29:28,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2338, PETRI_PLACES=231, PETRI_TRANSITIONS=227} [2023-08-24 09:29:28,136 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2023-08-24 09:29:28,136 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 227 transitions, 2338 flow [2023-08-24 09:29:28,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.3125) internal successors, (1605), 16 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:28,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:28,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:28,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:28,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 09:29:28,342 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:28,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash -904781294, now seen corresponding path program 12 times [2023-08-24 09:29:28,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:28,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540036074] [2023-08-24 09:29:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:28,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540036074] [2023-08-24 09:29:28,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540036074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679198846] [2023-08-24 09:29:28,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:29:28,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:28,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:28,461 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:28,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 09:29:28,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:29:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:28,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:29:28,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:28,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:28,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679198846] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:28,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:28,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 09:29:28,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186786632] [2023-08-24 09:29:28,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:29:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:29:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:29:28,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:28,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 227 transitions, 2338 flow. Second operand has 20 states, 20 states have (on average 100.05) internal successors, (2001), 20 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:28,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:28,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:29,620 INFO L124 PetriNetUnfolderBase]: 1777/2564 cut-off events. [2023-08-24 09:29:29,620 INFO L125 PetriNetUnfolderBase]: For 53703/53705 co-relation queries the response was YES. [2023-08-24 09:29:29,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21802 conditions, 2564 events. 1777/2564 cut-off events. For 53703/53705 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10746 event pairs, 170 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 21722. Up to 1081 conditions per place. [2023-08-24 09:29:29,641 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 345 selfloop transitions, 156 changer transitions 0/507 dead transitions. [2023-08-24 09:29:29,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 507 transitions, 6819 flow [2023-08-24 09:29:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 09:29:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 09:29:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2010 transitions. [2023-08-24 09:29:29,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37781954887218044 [2023-08-24 09:29:29,646 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2010 transitions. [2023-08-24 09:29:29,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2010 transitions. [2023-08-24 09:29:29,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:29,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2010 transitions. [2023-08-24 09:29:29,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 105.78947368421052) internal successors, (2010), 19 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,652 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 280.0) internal successors, (5600), 20 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,652 INFO L175 Difference]: Start difference. First operand has 231 places, 227 transitions, 2338 flow. Second operand 19 states and 2010 transitions. [2023-08-24 09:29:29,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 507 transitions, 6819 flow [2023-08-24 09:29:29,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 507 transitions, 5915 flow, removed 366 selfloop flow, removed 27 redundant places. [2023-08-24 09:29:29,802 INFO L231 Difference]: Finished difference. Result has 181 places, 300 transitions, 3543 flow [2023-08-24 09:29:29,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3543, PETRI_PLACES=181, PETRI_TRANSITIONS=300} [2023-08-24 09:29:29,802 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2023-08-24 09:29:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 300 transitions, 3543 flow [2023-08-24 09:29:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.05) internal successors, (2001), 20 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:29,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:29,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:30,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 09:29:30,008 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:30,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash -569487318, now seen corresponding path program 13 times [2023-08-24 09:29:30,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:30,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134665314] [2023-08-24 09:29:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:30,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:30,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134665314] [2023-08-24 09:29:30,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134665314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:30,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859987086] [2023-08-24 09:29:30,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:29:30,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:30,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:30,141 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:30,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 09:29:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:30,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:29:30,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:30,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:30,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859987086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:30,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:30,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 09:29:30,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498926471] [2023-08-24 09:29:30,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:30,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:29:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:29:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:29:30,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:30,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 300 transitions, 3543 flow. Second operand has 18 states, 18 states have (on average 100.38888888888889) internal successors, (1807), 18 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:30,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:30,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:30,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:31,104 INFO L124 PetriNetUnfolderBase]: 2094/3019 cut-off events. [2023-08-24 09:29:31,104 INFO L125 PetriNetUnfolderBase]: For 55775/55775 co-relation queries the response was YES. [2023-08-24 09:29:31,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24846 conditions, 3019 events. 2094/3019 cut-off events. For 55775/55775 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12944 event pairs, 347 based on Foata normal form. 42/3058 useless extension candidates. Maximal degree in co-relation 24784. Up to 1359 conditions per place. [2023-08-24 09:29:31,125 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 209 selfloop transitions, 125 changer transitions 0/339 dead transitions. [2023-08-24 09:29:31,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 339 transitions, 4801 flow [2023-08-24 09:29:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:29:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:29:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1048 transitions. [2023-08-24 09:29:31,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742857142857143 [2023-08-24 09:29:31,127 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1048 transitions. [2023-08-24 09:29:31,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1048 transitions. [2023-08-24 09:29:31,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:31,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1048 transitions. [2023-08-24 09:29:31,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:31,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:31,131 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:31,131 INFO L175 Difference]: Start difference. First operand has 181 places, 300 transitions, 3543 flow. Second operand 10 states and 1048 transitions. [2023-08-24 09:29:31,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 339 transitions, 4801 flow [2023-08-24 09:29:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 339 transitions, 4280 flow, removed 194 selfloop flow, removed 11 redundant places. [2023-08-24 09:29:31,326 INFO L231 Difference]: Finished difference. Result has 171 places, 284 transitions, 3574 flow [2023-08-24 09:29:31,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3574, PETRI_PLACES=171, PETRI_TRANSITIONS=284} [2023-08-24 09:29:31,326 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2023-08-24 09:29:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 284 transitions, 3574 flow [2023-08-24 09:29:31,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.38888888888889) internal successors, (1807), 18 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:31,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:31,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:31,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:31,527 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:31,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash 757983308, now seen corresponding path program 14 times [2023-08-24 09:29:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:31,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145291610] [2023-08-24 09:29:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:31,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145291610] [2023-08-24 09:29:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145291610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476732201] [2023-08-24 09:29:31,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:29:31,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:31,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:31,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:31,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 09:29:31,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:29:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:31,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:29:31,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:31,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:31,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476732201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:31,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:31,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 09:29:31,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491693442] [2023-08-24 09:29:31,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:31,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:29:31,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:31,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:29:31,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:29:31,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:31,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 284 transitions, 3574 flow. Second operand has 20 states, 20 states have (on average 100.2) internal successors, (2004), 20 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:31,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:31,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:31,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:32,623 INFO L124 PetriNetUnfolderBase]: 2158/3128 cut-off events. [2023-08-24 09:29:32,624 INFO L125 PetriNetUnfolderBase]: For 37414/37416 co-relation queries the response was YES. [2023-08-24 09:29:32,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23110 conditions, 3128 events. 2158/3128 cut-off events. For 37414/37416 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13711 event pairs, 310 based on Foata normal form. 23/3144 useless extension candidates. Maximal degree in co-relation 23049. Up to 1411 conditions per place. [2023-08-24 09:29:32,648 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 296 selfloop transitions, 102 changer transitions 0/403 dead transitions. [2023-08-24 09:29:32,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 403 transitions, 5914 flow [2023-08-24 09:29:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:29:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:29:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1047 transitions. [2023-08-24 09:29:32,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37392857142857144 [2023-08-24 09:29:32,650 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1047 transitions. [2023-08-24 09:29:32,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1047 transitions. [2023-08-24 09:29:32,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:32,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1047 transitions. [2023-08-24 09:29:32,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.7) internal successors, (1047), 10 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:32,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:32,653 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:32,653 INFO L175 Difference]: Start difference. First operand has 171 places, 284 transitions, 3574 flow. Second operand 10 states and 1047 transitions. [2023-08-24 09:29:32,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 403 transitions, 5914 flow [2023-08-24 09:29:32,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 403 transitions, 5664 flow, removed 83 selfloop flow, removed 6 redundant places. [2023-08-24 09:29:32,801 INFO L231 Difference]: Finished difference. Result has 175 places, 290 transitions, 3773 flow [2023-08-24 09:29:32,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3773, PETRI_PLACES=175, PETRI_TRANSITIONS=290} [2023-08-24 09:29:32,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2023-08-24 09:29:32,801 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 290 transitions, 3773 flow [2023-08-24 09:29:32,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.2) internal successors, (2004), 20 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:32,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:32,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:32,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-24 09:29:33,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:33,002 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:33,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:33,003 INFO L85 PathProgramCache]: Analyzing trace with hash 750743628, now seen corresponding path program 15 times [2023-08-24 09:29:33,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:33,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575322597] [2023-08-24 09:29:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:33,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:33,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575322597] [2023-08-24 09:29:33,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575322597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013134668] [2023-08-24 09:29:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:29:33,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:33,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:33,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:33,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 09:29:33,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:29:33,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:33,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:29:33,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:33,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:33,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013134668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:33,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:33,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 09:29:33,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792700883] [2023-08-24 09:29:33,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:33,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:29:33,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:29:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:29:33,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:33,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 290 transitions, 3773 flow. Second operand has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:33,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:33,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:33,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:34,119 INFO L124 PetriNetUnfolderBase]: 2168/3144 cut-off events. [2023-08-24 09:29:34,119 INFO L125 PetriNetUnfolderBase]: For 38649/38651 co-relation queries the response was YES. [2023-08-24 09:29:34,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22950 conditions, 3144 events. 2168/3144 cut-off events. For 38649/38651 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13769 event pairs, 522 based on Foata normal form. 24/3164 useless extension candidates. Maximal degree in co-relation 22889. Up to 2245 conditions per place. [2023-08-24 09:29:34,149 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 218 selfloop transitions, 126 changer transitions 0/349 dead transitions. [2023-08-24 09:29:34,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 349 transitions, 5142 flow [2023-08-24 09:29:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:29:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:29:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1042 transitions. [2023-08-24 09:29:34,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37214285714285716 [2023-08-24 09:29:34,150 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1042 transitions. [2023-08-24 09:29:34,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1042 transitions. [2023-08-24 09:29:34,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:34,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1042 transitions. [2023-08-24 09:29:34,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.2) internal successors, (1042), 10 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:34,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:34,154 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:34,154 INFO L175 Difference]: Start difference. First operand has 175 places, 290 transitions, 3773 flow. Second operand 10 states and 1042 transitions. [2023-08-24 09:29:34,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 349 transitions, 5142 flow [2023-08-24 09:29:34,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 349 transitions, 4952 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-24 09:29:34,308 INFO L231 Difference]: Finished difference. Result has 179 places, 299 transitions, 4172 flow [2023-08-24 09:29:34,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=3558, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4172, PETRI_PLACES=179, PETRI_TRANSITIONS=299} [2023-08-24 09:29:34,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2023-08-24 09:29:34,308 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 299 transitions, 4172 flow [2023-08-24 09:29:34,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:34,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:34,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:34,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:34,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:34,510 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:34,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1939112982, now seen corresponding path program 16 times [2023-08-24 09:29:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835852508] [2023-08-24 09:29:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:34,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:34,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835852508] [2023-08-24 09:29:34,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835852508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:34,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798474280] [2023-08-24 09:29:34,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:29:34,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:34,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:34,645 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:34,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 09:29:34,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:29:34,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:34,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:29:34,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:34,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:34,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798474280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:34,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:34,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-08-24 09:29:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661692013] [2023-08-24 09:29:34,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:34,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:29:34,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:29:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:29:34,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 280 [2023-08-24 09:29:34,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 299 transitions, 4172 flow. Second operand has 18 states, 18 states have (on average 96.5) internal successors, (1737), 18 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:34,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:34,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 280 [2023-08-24 09:29:34,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:36,248 INFO L124 PetriNetUnfolderBase]: 2287/3331 cut-off events. [2023-08-24 09:29:36,248 INFO L125 PetriNetUnfolderBase]: For 43392/43392 co-relation queries the response was YES. [2023-08-24 09:29:36,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25278 conditions, 3331 events. 2287/3331 cut-off events. For 43392/43392 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14787 event pairs, 297 based on Foata normal form. 14/3345 useless extension candidates. Maximal degree in co-relation 25213. Up to 1481 conditions per place. [2023-08-24 09:29:36,279 INFO L140 encePairwiseOnDemand]: 268/280 looper letters, 271 selfloop transitions, 272 changer transitions 0/543 dead transitions. [2023-08-24 09:29:36,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 543 transitions, 8169 flow [2023-08-24 09:29:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 09:29:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 09:29:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3501 transitions. [2023-08-24 09:29:36,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3572448979591837 [2023-08-24 09:29:36,282 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3501 transitions. [2023-08-24 09:29:36,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3501 transitions. [2023-08-24 09:29:36,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:36,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3501 transitions. [2023-08-24 09:29:36,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 100.02857142857142) internal successors, (3501), 35 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:36,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 280.0) internal successors, (10080), 36 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:36,294 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 280.0) internal successors, (10080), 36 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:36,294 INFO L175 Difference]: Start difference. First operand has 179 places, 299 transitions, 4172 flow. Second operand 35 states and 3501 transitions. [2023-08-24 09:29:36,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 543 transitions, 8169 flow [2023-08-24 09:29:36,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 543 transitions, 7752 flow, removed 76 selfloop flow, removed 6 redundant places. [2023-08-24 09:29:36,515 INFO L231 Difference]: Finished difference. Result has 219 places, 396 transitions, 6142 flow [2023-08-24 09:29:36,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6142, PETRI_PLACES=219, PETRI_TRANSITIONS=396} [2023-08-24 09:29:36,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2023-08-24 09:29:36,516 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 396 transitions, 6142 flow [2023-08-24 09:29:36,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.5) internal successors, (1737), 18 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:36,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:36,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:36,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 09:29:36,721 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:36,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1950699552, now seen corresponding path program 17 times [2023-08-24 09:29:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:36,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595564182] [2023-08-24 09:29:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:36,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:36,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:36,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595564182] [2023-08-24 09:29:36,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595564182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:36,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982869879] [2023-08-24 09:29:36,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:29:36,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:36,839 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:36,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 09:29:36,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:29:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:36,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:29:36,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:37,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:37,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982869879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:37,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:37,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2023-08-24 09:29:37,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705199730] [2023-08-24 09:29:37,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:37,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:29:37,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:37,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:29:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:29:37,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 280 [2023-08-24 09:29:37,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 396 transitions, 6142 flow. Second operand has 21 states, 21 states have (on average 96.28571428571429) internal successors, (2022), 21 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:37,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:37,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 280 [2023-08-24 09:29:37,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:39,153 INFO L124 PetriNetUnfolderBase]: 3997/5789 cut-off events. [2023-08-24 09:29:39,153 INFO L125 PetriNetUnfolderBase]: For 91866/91866 co-relation queries the response was YES. [2023-08-24 09:29:39,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46952 conditions, 5789 events. 3997/5789 cut-off events. For 91866/91866 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27281 event pairs, 575 based on Foata normal form. 54/5843 useless extension candidates. Maximal degree in co-relation 46875. Up to 3008 conditions per place. [2023-08-24 09:29:39,300 INFO L140 encePairwiseOnDemand]: 268/280 looper letters, 582 selfloop transitions, 373 changer transitions 0/955 dead transitions. [2023-08-24 09:29:39,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 955 transitions, 15989 flow [2023-08-24 09:29:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 09:29:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 09:29:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4133 transitions. [2023-08-24 09:29:39,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36001742160278744 [2023-08-24 09:29:39,304 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4133 transitions. [2023-08-24 09:29:39,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4133 transitions. [2023-08-24 09:29:39,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:39,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4133 transitions. [2023-08-24 09:29:39,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 100.8048780487805) internal successors, (4133), 41 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:39,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 280.0) internal successors, (11760), 42 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:39,318 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 280.0) internal successors, (11760), 42 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:39,318 INFO L175 Difference]: Start difference. First operand has 219 places, 396 transitions, 6142 flow. Second operand 41 states and 4133 transitions. [2023-08-24 09:29:39,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 955 transitions, 15989 flow [2023-08-24 09:29:39,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 955 transitions, 14408 flow, removed 519 selfloop flow, removed 8 redundant places. [2023-08-24 09:29:39,864 INFO L231 Difference]: Finished difference. Result has 272 places, 670 transitions, 11090 flow [2023-08-24 09:29:39,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11090, PETRI_PLACES=272, PETRI_TRANSITIONS=670} [2023-08-24 09:29:39,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2023-08-24 09:29:39,865 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 670 transitions, 11090 flow [2023-08-24 09:29:39,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 96.28571428571429) internal successors, (2022), 21 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:39,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:39,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:39,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:40,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 09:29:40,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:40,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash -834473296, now seen corresponding path program 18 times [2023-08-24 09:29:40,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:40,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624862911] [2023-08-24 09:29:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:40,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624862911] [2023-08-24 09:29:40,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624862911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294157090] [2023-08-24 09:29:40,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:29:40,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:40,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:40,183 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:40,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 09:29:40,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:29:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:40,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:29:40,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:40,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:29:40,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294157090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:40,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:40,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 09:29:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784985158] [2023-08-24 09:29:40,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:29:40,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:29:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:29:40,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:40,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 670 transitions, 11090 flow. Second operand has 21 states, 21 states have (on average 99.85714285714286) internal successors, (2097), 21 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:40,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:40,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:40,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:41,810 INFO L124 PetriNetUnfolderBase]: 3925/5664 cut-off events. [2023-08-24 09:29:41,810 INFO L125 PetriNetUnfolderBase]: For 104771/104773 co-relation queries the response was YES. [2023-08-24 09:29:41,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50585 conditions, 5664 events. 3925/5664 cut-off events. For 104771/104773 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26496 event pairs, 742 based on Foata normal form. 40/5697 useless extension candidates. Maximal degree in co-relation 50488. Up to 3925 conditions per place. [2023-08-24 09:29:41,877 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 426 selfloop transitions, 273 changer transitions 0/721 dead transitions. [2023-08-24 09:29:41,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 721 transitions, 13202 flow [2023-08-24 09:29:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 09:29:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 09:29:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1255 transitions. [2023-08-24 09:29:41,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37351190476190477 [2023-08-24 09:29:41,879 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1255 transitions. [2023-08-24 09:29:41,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1255 transitions. [2023-08-24 09:29:41,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:41,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1255 transitions. [2023-08-24 09:29:41,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:41,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 280.0) internal successors, (3640), 13 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:41,883 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 280.0) internal successors, (3640), 13 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:41,883 INFO L175 Difference]: Start difference. First operand has 272 places, 670 transitions, 11090 flow. Second operand 12 states and 1255 transitions. [2023-08-24 09:29:41,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 721 transitions, 13202 flow [2023-08-24 09:29:42,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 721 transitions, 11937 flow, removed 600 selfloop flow, removed 7 redundant places. [2023-08-24 09:29:42,754 INFO L231 Difference]: Finished difference. Result has 271 places, 657 transitions, 10331 flow [2023-08-24 09:29:42,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=9785, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10331, PETRI_PLACES=271, PETRI_TRANSITIONS=657} [2023-08-24 09:29:42,755 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2023-08-24 09:29:42,756 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 657 transitions, 10331 flow [2023-08-24 09:29:42,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.85714285714286) internal successors, (2097), 21 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:42,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:42,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:42,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:42,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:42,962 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:42,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1701479232, now seen corresponding path program 19 times [2023-08-24 09:29:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669435203] [2023-08-24 09:29:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:42,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:43,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:43,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669435203] [2023-08-24 09:29:43,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669435203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:43,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536635830] [2023-08-24 09:29:43,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:29:43,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:43,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:43,103 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:43,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 09:29:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:43,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:29:43,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:43,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:29:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536635830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:43,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-08-24 09:29:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893089200] [2023-08-24 09:29:43,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:29:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:29:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:29:43,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2023-08-24 09:29:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 657 transitions, 10331 flow. Second operand has 22 states, 22 states have (on average 100.0909090909091) internal successors, (2202), 22 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:43,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2023-08-24 09:29:43,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:44,874 INFO L124 PetriNetUnfolderBase]: 3856/5542 cut-off events. [2023-08-24 09:29:44,875 INFO L125 PetriNetUnfolderBase]: For 81815/81817 co-relation queries the response was YES. [2023-08-24 09:29:44,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46604 conditions, 5542 events. 3856/5542 cut-off events. For 81815/81817 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25840 event pairs, 376 based on Foata normal form. 63/5598 useless extension candidates. Maximal degree in co-relation 46508. Up to 2493 conditions per place. [2023-08-24 09:29:44,941 INFO L140 encePairwiseOnDemand]: 271/280 looper letters, 514 selfloop transitions, 309 changer transitions 0/845 dead transitions. [2023-08-24 09:29:44,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 845 transitions, 14236 flow [2023-08-24 09:29:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:29:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:29:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1796 transitions. [2023-08-24 09:29:44,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3773109243697479 [2023-08-24 09:29:44,943 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1796 transitions. [2023-08-24 09:29:44,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1796 transitions. [2023-08-24 09:29:44,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:44,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1796 transitions. [2023-08-24 09:29:44,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 105.6470588235294) internal successors, (1796), 17 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:44,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 280.0) internal successors, (5040), 18 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:44,947 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 280.0) internal successors, (5040), 18 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:44,947 INFO L175 Difference]: Start difference. First operand has 271 places, 657 transitions, 10331 flow. Second operand 17 states and 1796 transitions. [2023-08-24 09:29:44,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 845 transitions, 14236 flow [2023-08-24 09:29:45,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 845 transitions, 13714 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-24 09:29:45,642 INFO L231 Difference]: Finished difference. Result has 275 places, 645 transitions, 10164 flow [2023-08-24 09:29:45,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=9546, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10164, PETRI_PLACES=275, PETRI_TRANSITIONS=645} [2023-08-24 09:29:45,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2023-08-24 09:29:45,643 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 645 transitions, 10164 flow [2023-08-24 09:29:45,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.0909090909091) internal successors, (2202), 22 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:45,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:45,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:45,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:45,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:45,844 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:45,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1489547798, now seen corresponding path program 3 times [2023-08-24 09:29:45,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:45,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896781873] [2023-08-24 09:29:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:45,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:47,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:47,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896781873] [2023-08-24 09:29:47,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896781873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:47,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613081749] [2023-08-24 09:29:47,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:29:47,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:47,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:47,079 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:47,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 09:29:47,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:29:47,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:47,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 09:29:47,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:47,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:47,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2023-08-24 09:29:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:47,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-24 09:29:47,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-24 09:29:48,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:48,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 89 [2023-08-24 09:29:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:48,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:50,129 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4)))) (and (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (or (< (select .cse0 .cse1) c_~min1~0) (forall ((~M~0 Int)) (let ((.cse2 (select .cse0 (+ c_~A~0.offset (* ~M~0 4))))) (or (= c_~min1~0 .cse2) (<= c_~min2~0 .cse2) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) (< (select .cse0 c_~A~0.offset) c_~min2~0)))) (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse3 (select .cse5 .cse1)) (.cse4 (select .cse5 c_~A~0.offset))) (or (= .cse3 .cse4) (<= c_~min1~0 .cse3) (<= c_~min2~0 .cse4) (forall ((~M~0 Int)) (or (< (select .cse5 (+ c_~A~0.offset (* ~M~0 4))) .cse4) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))))))) (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse6 (select .cse7 c_~A~0.offset))) (or (= c_~min1~0 .cse6) (< (select .cse7 .cse1) c_~min1~0) (<= c_~min2~0 .cse6) (forall ((~M~0 Int)) (or (< (select .cse7 (+ c_~A~0.offset (* ~M~0 4))) .cse6) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))))))) (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse9 (select .cse11 c_~A~0.offset)) (.cse8 (select .cse11 .cse1))) (or (<= c_~min1~0 .cse8) (<= c_~min2~0 .cse9) (forall ((~M~0 Int)) (let ((.cse10 (select .cse11 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= .cse9 .cse10) (<= c_~N~0 ~M~0) (= .cse10 .cse8) (< (+ ~M~0 1) c_~N~0)))))))) (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse12 (select .cse14 .cse1))) (or (<= c_~min1~0 .cse12) (forall ((~M~0 Int)) (let ((.cse13 (select .cse14 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= c_~min2~0 .cse13) (<= c_~N~0 ~M~0) (= .cse13 .cse12) (< (+ ~M~0 1) c_~N~0)))) (< (select .cse14 c_~A~0.offset) c_~min2~0))))) (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse15 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse16 (select .cse15 .cse1))) (or (forall ((~M~0 Int)) (or (<= c_~N~0 ~M~0) (< (select .cse15 (+ c_~A~0.offset (* ~M~0 4))) c_~min2~0) (< (+ ~M~0 1) c_~N~0))) (= c_~min2~0 .cse16) (<= c_~min1~0 .cse16) (< (select .cse15 c_~A~0.offset) c_~min2~0))))) (or (= c_~min2~0 c_~min1~0) (forall ((~M~0 Int) (v_ArrVal_1147 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (or (< (select .cse17 .cse1) c_~min1~0) (<= c_~N~0 ~M~0) (< (select .cse17 c_~A~0.offset) c_~min2~0) (< (select .cse17 (+ c_~A~0.offset (* ~M~0 4))) c_~min2~0) (< (+ ~M~0 1) c_~N~0))))) (forall ((v_ArrVal_1147 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse19 (select .cse18 c_~A~0.offset))) (or (< (select .cse18 .cse1) c_~min1~0) (<= c_~min2~0 .cse19) (forall ((~M~0 Int)) (let ((.cse20 (select .cse18 (+ c_~A~0.offset (* ~M~0 4))))) (or (= c_~min1~0 .cse20) (<= .cse19 .cse20) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))))))))) is different from false [2023-08-24 09:29:50,534 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4)))) (and (forall ((v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse0 (select .cse2 c_~A~0.offset)) (.cse1 (select .cse2 .cse3))) (or (= .cse0 .cse1) (forall ((~M~0 Int)) (or (< (select .cse2 (+ c_~A~0.offset (* ~M~0 4))) .cse0) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (<= c_~min2~0 .cse0) (<= c_~min1~0 .cse1))))) (forall ((v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse6 (select .cse4 .cse3))) (or (< (select .cse4 c_~A~0.offset) c_~min2~0) (forall ((~M~0 Int)) (let ((.cse5 (select .cse4 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= c_~N~0 ~M~0) (<= c_~min2~0 .cse5) (= .cse5 .cse6) (< (+ ~M~0 1) c_~N~0)))) (<= c_~min1~0 .cse6))))) (forall ((v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse9 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse7 (select .cse9 c_~A~0.offset))) (or (forall ((~M~0 Int)) (let ((.cse8 (select .cse9 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= .cse7 .cse8) (= c_~min1~0 .cse8) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) (< (select .cse9 .cse3) c_~min1~0) (<= c_~min2~0 .cse7))))) (forall ((v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse10 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (or (< (select .cse10 .cse3) c_~min1~0) (< (select .cse10 c_~A~0.offset) c_~min2~0) (forall ((~M~0 Int)) (let ((.cse11 (select .cse10 (+ c_~A~0.offset (* ~M~0 4))))) (or (= c_~min1~0 .cse11) (<= c_~N~0 ~M~0) (<= c_~min2~0 .cse11) (< (+ ~M~0 1) c_~N~0))))))) (forall ((v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse3))) (or (< (select .cse12 c_~A~0.offset) c_~min2~0) (= c_~min2~0 .cse13) (forall ((~M~0 Int)) (or (<= c_~N~0 ~M~0) (< (select .cse12 (+ c_~A~0.offset (* ~M~0 4))) c_~min2~0) (< (+ ~M~0 1) c_~N~0))) (<= c_~min1~0 .cse13))))) (or (= c_~min2~0 c_~min1~0) (forall ((~M~0 Int) (v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse14 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (or (< (select .cse14 .cse3) c_~min1~0) (< (select .cse14 c_~A~0.offset) c_~min2~0) (<= c_~N~0 ~M~0) (< (select .cse14 (+ c_~A~0.offset (* ~M~0 4))) c_~min2~0) (< (+ ~M~0 1) c_~N~0))))) (forall ((v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse15 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse16 (select .cse15 c_~A~0.offset))) (or (< (select .cse15 .cse3) c_~min1~0) (= c_~min1~0 .cse16) (forall ((~M~0 Int)) (or (< (select .cse15 (+ c_~A~0.offset (* ~M~0 4))) .cse16) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (<= c_~min2~0 .cse16))))) (forall ((v_ArrVal_1147 (Array Int Int)) (v_ArrVal_1146 (Array Int Int))) (let ((.cse20 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1147) c_~A~0.base))) (let ((.cse17 (select .cse20 c_~A~0.offset)) (.cse19 (select .cse20 .cse3))) (or (forall ((~M~0 Int)) (let ((.cse18 (select .cse20 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= .cse17 .cse18) (<= c_~N~0 ~M~0) (= .cse18 .cse19) (< (+ ~M~0 1) c_~N~0)))) (<= c_~min2~0 .cse17) (<= c_~min1~0 .cse19))))))) is different from false [2023-08-24 09:29:51,207 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:51,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 3635 treesize of output 3659 [2023-08-24 09:29:51,552 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:51,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1899 treesize of output 1902 [2023-08-24 09:29:51,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:51,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1873 treesize of output 1850 [2023-08-24 09:29:52,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:52,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1821 treesize of output 1831 [2023-08-24 09:29:52,440 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:52,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1802 treesize of output 1793 [2023-08-24 09:29:52,685 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:52,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1764 treesize of output 1771 [2023-08-24 09:29:52,902 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:52,903 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1742 treesize of output 1748 [2023-08-24 09:29:53,159 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:53,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1719 treesize of output 1702 [2023-08-24 09:29:53,352 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:53,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1673 treesize of output 1642 [2023-08-24 09:29:53,482 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 09:29:53,582 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:53,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1613 treesize of output 1612 [2023-08-24 09:29:53,894 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:53,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1583 treesize of output 1568 [2023-08-24 09:29:54,137 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:54,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1539 treesize of output 1547 [2023-08-24 09:29:54,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:54,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1518 treesize of output 1532 [2023-08-24 09:29:54,652 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:54,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1503 treesize of output 1502 [2023-08-24 09:29:54,920 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:54,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1473 treesize of output 1446 [2023-08-24 09:29:55,200 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:55,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1417 treesize of output 1418 [2023-08-24 09:29:55,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:55,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1389 treesize of output 1376 Received shutdown request... [2023-08-24 09:41:59,766 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:41:59,766 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 [2023-08-24 09:41:59,768 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 09:41:59,770 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 09:41:59,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 09:41:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 09:41:59,971 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. [2023-08-24 09:41:59,972 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 09:41:59,972 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 09:41:59,972 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 09:41:59,973 INFO L445 BasicCegarLoop]: Path program histogram: [19, 3, 1, 1, 1, 1] [2023-08-24 09:41:59,977 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 09:41:59,977 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 09:41:59,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 09:41:59 BasicIcfg [2023-08-24 09:41:59,984 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 09:41:59,984 INFO L158 Benchmark]: Toolchain (without parser) took 820704.53ms. Allocated memory was 356.5MB in the beginning and 2.5GB in the end (delta: 2.2GB). Free memory was 332.7MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-08-24 09:41:59,984 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory was 334.2MB in the beginning and 334.1MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:41:59,985 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.11ms. Allocated memory is still 356.5MB. Free memory was 332.2MB in the beginning and 320.6MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 09:41:59,985 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.60ms. Allocated memory is still 356.5MB. Free memory was 320.6MB in the beginning and 319.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:41:59,985 INFO L158 Benchmark]: Boogie Preprocessor took 45.87ms. Allocated memory is still 356.5MB. Free memory was 319.1MB in the beginning and 317.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:41:59,985 INFO L158 Benchmark]: RCFGBuilder took 593.51ms. Allocated memory is still 356.5MB. Free memory was 317.0MB in the beginning and 296.0MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 09:41:59,986 INFO L158 Benchmark]: TraceAbstraction took 819753.68ms. Allocated memory was 356.5MB in the beginning and 2.5GB in the end (delta: 2.2GB). Free memory was 295.5MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-08-24 09:41:59,988 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory was 334.2MB in the beginning and 334.1MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 254.11ms. Allocated memory is still 356.5MB. Free memory was 332.2MB in the beginning and 320.6MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.60ms. Allocated memory is still 356.5MB. Free memory was 320.6MB in the beginning and 319.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 45.87ms. Allocated memory is still 356.5MB. Free memory was 319.1MB in the beginning and 317.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 593.51ms. Allocated memory is still 356.5MB. Free memory was 317.0MB in the beginning and 296.0MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 819753.68ms. Allocated memory was 356.5MB in the beginning and 2.5GB in the end (delta: 2.2GB). Free memory was 295.5MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 133 PlacesBefore, 30 PlacesAfterwards, 135 TransitionsBefore, 24 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 8 FixpointIterations, 71 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 17 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 132 TotalNumberOfCompositions, 1676 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1594, independent: 1574, independent conditional: 0, independent unconditional: 1574, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 813, independent: 805, independent conditional: 0, independent unconditional: 805, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1594, independent: 769, independent conditional: 0, independent unconditional: 769, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 813, unknown conditional: 0, unknown unconditional: 813] , Statistics on independence cache: Total cache size (in pairs): 52, Positive cache size: 50, Positive conditional cache size: 0, Positive unconditional cache size: 50, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 170 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 819.6s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 40.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 2705 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2705 mSDsluCounter, 942 SdHoareTripleChecker+Invalid, 7.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 165 IncrementalHoareTripleChecker+Unchecked, 830 mSDsCounter, 170 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15190 IncrementalHoareTripleChecker+Invalid, 15528 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 170 mSolverCounterUnsat, 112 mSDtfsCounter, 15190 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1494 GetRequests, 776 SyntacticMatches, 39 SemanticMatches, 679 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6039 ImplicationChecksByTransitivity, 33.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11090occurred in iteration=23, InterpolantAutomatonStates: 407, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 32.4s InterpolantComputationTime, 1137 NumberOfCodeBlocks, 1126 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1614 ConstructedInterpolants, 22 QuantifiedInterpolants, 15484 SizeOfPredicates, 186 NumberOfNonLiveVariables, 4886 ConjunctsInSsa, 408 ConjunctsInUnsatCore, 71 InterpolantComputations, 4 PerfectInterpolantSequences, 133/322 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown