/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-horseshoe.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:57:51,507 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:57:51,585 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 08:57:51,590 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:57:51,590 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:57:51,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:57:51,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:57:51,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:57:51,623 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:57:51,626 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:57:51,626 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:57:51,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:57:51,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:57:51,628 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:57:51,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:57:51,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:57:51,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:57:51,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:57:51,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:57:51,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:57:51,630 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:57:51,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:57:51,630 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:57:51,631 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:57:51,631 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:57:51,631 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:57:51,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:57:51,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:57:51,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:57:51,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:57:51,633 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:57:51,633 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:57:51,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:57:51,633 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:57:51,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:57:51,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:57:51,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:57:51,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:57:51,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:57:51,968 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:57:51,968 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:57:51,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-24 08:57:53,059 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:57:53,292 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:57:53,292 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-24 08:57:53,301 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b774b574d/fa9aacc253f24a5f9d976f59aad0a278/FLAGbd1032be5 [2023-08-24 08:57:53,320 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b774b574d/fa9aacc253f24a5f9d976f59aad0a278 [2023-08-24 08:57:53,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:57:53,326 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:57:53,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:57:53,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:57:53,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:57:53,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d99563f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53, skipping insertion in model container [2023-08-24 08:57:53,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,365 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:57:53,556 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-horseshoe.wvr.c[3424,3437] [2023-08-24 08:57:53,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:57:53,576 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:57:53,607 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-horseshoe.wvr.c[3424,3437] [2023-08-24 08:57:53,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:57:53,616 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:57:53,616 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:57:53,621 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:57:53,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53 WrapperNode [2023-08-24 08:57:53,622 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:57:53,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:57:53,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:57:53,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:57:53,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,681 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 255 [2023-08-24 08:57:53,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:57:53,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:57:53,682 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:57:53,682 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:57:53,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,704 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,704 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,729 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:57:53,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:57:53,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:57:53,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:57:53,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (1/1) ... [2023-08-24 08:57:53,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:57:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:53,764 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 08:57:53,786 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 08:57:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:57:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:57:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:57:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:57:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:57:53,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:57:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:57:53,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:57:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 08:57:53,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 08:57:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:57:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 08:57:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 08:57:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 08:57:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:57:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:57:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:57:53,805 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 08:57:53,918 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:57:53,920 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:57:54,299 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:57:54,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:57:54,425 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-24 08:57:54,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:57:54 BoogieIcfgContainer [2023-08-24 08:57:54,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:57:54,437 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:57:54,437 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:57:54,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:57:54,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:57:53" (1/3) ... [2023-08-24 08:57:54,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f601dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:57:54, skipping insertion in model container [2023-08-24 08:57:54,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:53" (2/3) ... [2023-08-24 08:57:54,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f601dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:57:54, skipping insertion in model container [2023-08-24 08:57:54,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:57:54" (3/3) ... [2023-08-24 08:57:54,443 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-08-24 08:57:54,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:57:54,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:57:54,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:57:54,545 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 08:57:54,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 204 transitions, 432 flow [2023-08-24 08:57:54,666 INFO L124 PetriNetUnfolderBase]: 18/201 cut-off events. [2023-08-24 08:57:54,666 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:57:54,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 18/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2023-08-24 08:57:54,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 204 transitions, 432 flow [2023-08-24 08:57:54,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 191 transitions, 400 flow [2023-08-24 08:57:54,679 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:57:54,686 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 191 transitions, 400 flow [2023-08-24 08:57:54,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 191 transitions, 400 flow [2023-08-24 08:57:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 191 transitions, 400 flow [2023-08-24 08:57:54,728 INFO L124 PetriNetUnfolderBase]: 18/191 cut-off events. [2023-08-24 08:57:54,728 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:57:54,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 18/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2023-08-24 08:57:54,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 1528 [2023-08-24 08:58:01,214 INFO L134 LiptonReduction]: Checked pairs total: 2401 [2023-08-24 08:58:01,214 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-24 08:58:01,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:58:01,232 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;@3dc5142f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:58:01,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 08:58:01,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:58:01,242 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 08:58:01,242 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:58:01,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:01,243 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 08:58:01,243 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 08:58:01,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1503097758, now seen corresponding path program 1 times [2023-08-24 08:58:01,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:01,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040099139] [2023-08-24 08:58:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:01,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:01,524 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 08:58:01,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:01,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040099139] [2023-08-24 08:58:01,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040099139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:58:01,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:58:01,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 08:58:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646670118] [2023-08-24 08:58:01,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:58:01,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 08:58:01,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:01,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 08:58:01,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 08:58:01,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 407 [2023-08-24 08:58:01,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 08:58:01,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:01,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 407 [2023-08-24 08:58:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:01,685 INFO L124 PetriNetUnfolderBase]: 324/461 cut-off events. [2023-08-24 08:58:01,685 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-24 08:58:01,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 461 events. 324/461 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1461 event pairs, 167 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 739. Up to 453 conditions per place. [2023-08-24 08:58:01,690 INFO L140 encePairwiseOnDemand]: 406/407 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-24 08:58:01,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-08-24 08:58:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 08:58:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 08:58:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 383 transitions. [2023-08-24 08:58:01,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705159705159705 [2023-08-24 08:58:01,708 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 383 transitions. [2023-08-24 08:58:01,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 383 transitions. [2023-08-24 08:58:01,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:01,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 383 transitions. [2023-08-24 08:58:01,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 08:58:01,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states 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 08:58:01,720 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states 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 08:58:01,721 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 383 transitions. [2023-08-24 08:58:01,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-08-24 08:58:01,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 08:58:01,727 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-08-24 08:58:01,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 08:58:01,731 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-24 08:58:01,731 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-08-24 08:58:01,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 08:58:01,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:01,732 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 08:58:01,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:58:01,733 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 08:58:01,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:01,735 INFO L85 PathProgramCache]: Analyzing trace with hash 650337903, now seen corresponding path program 1 times [2023-08-24 08:58:01,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:01,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143543822] [2023-08-24 08:58:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:02,030 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 08:58:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143543822] [2023-08-24 08:58:02,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143543822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:58:02,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:58:02,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 08:58:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957530039] [2023-08-24 08:58:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:58:02,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:58:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:58:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:58:02,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 407 [2023-08-24 08:58:02,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 08:58:02,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:02,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 407 [2023-08-24 08:58:02,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:02,153 INFO L124 PetriNetUnfolderBase]: 326/478 cut-off events. [2023-08-24 08:58:02,153 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 08:58:02,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 478 events. 326/478 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1526 event pairs, 167 based on Foata normal form. 14/335 useless extension candidates. Maximal degree in co-relation 962. Up to 449 conditions per place. [2023-08-24 08:58:02,158 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 23 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2023-08-24 08:58:02,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 159 flow [2023-08-24 08:58:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:58:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:58:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2023-08-24 08:58:02,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974201474201474 [2023-08-24 08:58:02,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2023-08-24 08:58:02,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2023-08-24 08:58:02,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:02,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2023-08-24 08:58:02,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states 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 08:58:02,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 08:58:02,174 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 08:58:02,174 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 647 transitions. [2023-08-24 08:58:02,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 159 flow [2023-08-24 08:58:02,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 08:58:02,177 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-08-24 08:58:02,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-24 08:58:02,179 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-24 08:58:02,180 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-08-24 08:58:02,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 08:58:02,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:02,189 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 08:58:02,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:58:02,189 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 08:58:02,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -882881433, now seen corresponding path program 1 times [2023-08-24 08:58:02,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247831526] [2023-08-24 08:58:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:58:02,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:02,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247831526] [2023-08-24 08:58:02,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247831526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:58:02,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:58:02,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:58:02,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588673180] [2023-08-24 08:58:02,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:58:02,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:58:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:58:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:58:02,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 407 [2023-08-24 08:58:02,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 08:58:02,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:02,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 407 [2023-08-24 08:58:02,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:02,553 INFO L124 PetriNetUnfolderBase]: 368/550 cut-off events. [2023-08-24 08:58:02,554 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-24 08:58:02,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 550 events. 368/550 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1969 event pairs, 194 based on Foata normal form. 30/405 useless extension candidates. Maximal degree in co-relation 1340. Up to 447 conditions per place. [2023-08-24 08:58:02,558 INFO L140 encePairwiseOnDemand]: 399/407 looper letters, 23 selfloop transitions, 3 changer transitions 12/41 dead transitions. [2023-08-24 08:58:02,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 190 flow [2023-08-24 08:58:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:58:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:58:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-24 08:58:02,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39864864864864863 [2023-08-24 08:58:02,561 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-24 08:58:02,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-24 08:58:02,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:02,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-24 08:58:02,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:58:02,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 08:58:02,568 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 08:58:02,568 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 4 states and 649 transitions. [2023-08-24 08:58:02,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 190 flow [2023-08-24 08:58:02,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 08:58:02,571 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 98 flow [2023-08-24 08:58:02,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-24 08:58:02,572 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-24 08:58:02,575 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 98 flow [2023-08-24 08:58:02,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 08:58:02,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:02,576 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 08:58:02,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 08:58:02,576 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 08:58:02,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1459056327, now seen corresponding path program 1 times [2023-08-24 08:58:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:02,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415770880] [2023-08-24 08:58:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:02,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:58:02,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:02,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415770880] [2023-08-24 08:58:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415770880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:58:02,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:58:02,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 08:58:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579814038] [2023-08-24 08:58:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:58:02,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:58:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:58:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:58:02,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 08:58:02,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 08:58:02,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:02,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 08:58:02,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:02,834 INFO L124 PetriNetUnfolderBase]: 340/485 cut-off events. [2023-08-24 08:58:02,835 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-24 08:58:02,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 485 events. 340/485 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1431 event pairs, 48 based on Foata normal form. 16/334 useless extension candidates. Maximal degree in co-relation 1360. Up to 390 conditions per place. [2023-08-24 08:58:02,838 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-24 08:58:02,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 202 flow [2023-08-24 08:58:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:58:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:58:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-24 08:58:02,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2023-08-24 08:58:02,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-24 08:58:02,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-24 08:58:02,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:02,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-24 08:58:02,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:58:02,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states 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 08:58:02,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states 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 08:58:02,846 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 98 flow. Second operand 3 states and 561 transitions. [2023-08-24 08:58:02,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 202 flow [2023-08-24 08:58:02,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 196 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 08:58:02,848 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 117 flow [2023-08-24 08:58:02,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-24 08:58:02,848 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-24 08:58:02,849 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 117 flow [2023-08-24 08:58:02,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 08:58:02,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:02,849 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 08:58:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 08:58:02,850 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 08:58:02,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1982199621, now seen corresponding path program 2 times [2023-08-24 08:58:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107223999] [2023-08-24 08:58:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:02,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:04,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:04,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107223999] [2023-08-24 08:58:04,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107223999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:04,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802087643] [2023-08-24 08:58:04,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:58:04,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:04,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:04,434 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 08:58:04,455 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 08:58:04,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 08:58:04,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:04,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 08:58:04,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:04,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:58:04,864 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 18 treesize of output 20 [2023-08-24 08:58:05,040 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 25 treesize of output 9 [2023-08-24 08:58:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:58:05,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 08:58:05,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802087643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:58:05,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 08:58:05,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-08-24 08:58:05,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540128153] [2023-08-24 08:58:05,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:58:05,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 08:58:05,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:05,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 08:58:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:58:05,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 407 [2023-08-24 08:58:05,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 117 flow. Second operand has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 08:58:05,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:05,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 407 [2023-08-24 08:58:05,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:05,445 INFO L124 PetriNetUnfolderBase]: 288/451 cut-off events. [2023-08-24 08:58:05,445 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-08-24 08:58:05,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 451 events. 288/451 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1372 event pairs, 35 based on Foata normal form. 5/328 useless extension candidates. Maximal degree in co-relation 1418. Up to 366 conditions per place. [2023-08-24 08:58:05,449 INFO L140 encePairwiseOnDemand]: 396/407 looper letters, 45 selfloop transitions, 9 changer transitions 13/69 dead transitions. [2023-08-24 08:58:05,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 360 flow [2023-08-24 08:58:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:58:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:58:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1178 transitions. [2023-08-24 08:58:05,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3617936117936118 [2023-08-24 08:58:05,453 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1178 transitions. [2023-08-24 08:58:05,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1178 transitions. [2023-08-24 08:58:05,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:05,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1178 transitions. [2023-08-24 08:58:05,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 147.25) internal successors, (1178), 8 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 08:58:05,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 08:58:05,463 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 08:58:05,463 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 117 flow. Second operand 8 states and 1178 transitions. [2023-08-24 08:58:05,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 360 flow [2023-08-24 08:58:05,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 345 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 08:58:05,466 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 185 flow [2023-08-24 08:58:05,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-08-24 08:58:05,467 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-24 08:58:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 185 flow [2023-08-24 08:58:05,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 08:58:05,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:05,468 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 08:58:05,478 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 08:58:05,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:05,675 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 08:58:05,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash 747784597, now seen corresponding path program 3 times [2023-08-24 08:58:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634369327] [2023-08-24 08:58:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:07,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634369327] [2023-08-24 08:58:07,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634369327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906688568] [2023-08-24 08:58:07,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:58:07,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:07,155 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 08:58:07,158 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 08:58:07,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 08:58:07,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:07,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 08:58:07,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:07,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:58:07,574 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 18 treesize of output 20 [2023-08-24 08:58:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:58:07,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 08:58:07,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906688568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:58:07,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 08:58:07,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-08-24 08:58:07,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030573313] [2023-08-24 08:58:07,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:58:07,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 08:58:07,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:07,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 08:58:07,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:58:07,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 407 [2023-08-24 08:58:07,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 185 flow. Second operand has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 08:58:07,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:07,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 407 [2023-08-24 08:58:07,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:08,088 INFO L124 PetriNetUnfolderBase]: 303/509 cut-off events. [2023-08-24 08:58:08,089 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-24 08:58:08,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 509 events. 303/509 cut-off events. For 613/613 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1820 event pairs, 59 based on Foata normal form. 7/404 useless extension candidates. Maximal degree in co-relation 1796. Up to 386 conditions per place. [2023-08-24 08:58:08,092 INFO L140 encePairwiseOnDemand]: 395/407 looper letters, 40 selfloop transitions, 9 changer transitions 24/75 dead transitions. [2023-08-24 08:58:08,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 462 flow [2023-08-24 08:58:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:58:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:58:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1177 transitions. [2023-08-24 08:58:08,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3614864864864865 [2023-08-24 08:58:08,096 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1177 transitions. [2023-08-24 08:58:08,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1177 transitions. [2023-08-24 08:58:08,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:08,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1177 transitions. [2023-08-24 08:58:08,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 08:58:08,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 08:58:08,105 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 08:58:08,105 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 185 flow. Second operand 8 states and 1177 transitions. [2023-08-24 08:58:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 462 flow [2023-08-24 08:58:08,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 429 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-24 08:58:08,109 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 236 flow [2023-08-24 08:58:08,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=236, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-24 08:58:08,110 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-24 08:58:08,110 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 236 flow [2023-08-24 08:58:08,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 08:58:08,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:08,111 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 08:58:08,120 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 08:58:08,320 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,SelfDestructingSolverStorable5 [2023-08-24 08:58:08,320 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 08:58:08,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1454631379, now seen corresponding path program 4 times [2023-08-24 08:58:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:08,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231599940] [2023-08-24 08:58:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231599940] [2023-08-24 08:58:09,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231599940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338921251] [2023-08-24 08:58:09,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:58:09,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:09,616 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 08:58:09,636 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 08:58:09,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:58:09,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:09,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-24 08:58:09,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:58:09,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:58:09,806 INFO L322 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-08-24 08:58:09,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 08:58:09,882 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 15 treesize of output 11 [2023-08-24 08:58:09,970 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:58:09,971 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 16 treesize of output 18 [2023-08-24 08:58:10,033 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:58:10,060 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 08:58:10,153 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 08:58:10,494 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-24 08:58:10,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 49 [2023-08-24 08:58:10,522 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 08:58:10,522 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 19 treesize of output 10 [2023-08-24 08:58:10,584 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 25 treesize of output 9 [2023-08-24 08:58:10,644 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 08:58:10,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:11,596 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:11,597 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 204 treesize of output 144 [2023-08-24 08:58:11,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:11,638 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 19726 treesize of output 19158 [2023-08-24 08:58:11,810 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:11,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1142 treesize of output 1120 [2023-08-24 08:58:11,897 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:11,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1040 treesize of output 988 [2023-08-24 08:58:11,954 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 226 treesize of output 202 [2023-08-24 08:58:12,051 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:12,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 942 treesize of output 758 [2023-08-24 08:58:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:26,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338921251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:26,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:26,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 30 [2023-08-24 08:58:26,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275384456] [2023-08-24 08:58:26,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:26,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:58:26,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:58:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=893, Unknown=10, NotChecked=0, Total=992 [2023-08-24 08:58:26,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 407 [2023-08-24 08:58:26,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 236 flow. Second operand has 32 states, 32 states have (on average 104.84375) internal successors, (3355), 32 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states 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 08:58:26,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:26,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 407 [2023-08-24 08:58:26,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:30,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:58:35,049 INFO L124 PetriNetUnfolderBase]: 666/1184 cut-off events. [2023-08-24 08:58:35,049 INFO L125 PetriNetUnfolderBase]: For 2297/2299 co-relation queries the response was YES. [2023-08-24 08:58:35,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4484 conditions, 1184 events. 666/1184 cut-off events. For 2297/2299 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5864 event pairs, 80 based on Foata normal form. 8/963 useless extension candidates. Maximal degree in co-relation 4468. Up to 491 conditions per place. [2023-08-24 08:58:35,057 INFO L140 encePairwiseOnDemand]: 392/407 looper letters, 110 selfloop transitions, 54 changer transitions 73/239 dead transitions. [2023-08-24 08:58:35,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 239 transitions, 1650 flow [2023-08-24 08:58:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 08:58:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 08:58:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2994 transitions. [2023-08-24 08:58:35,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27245427245427245 [2023-08-24 08:58:35,067 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2994 transitions. [2023-08-24 08:58:35,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2994 transitions. [2023-08-24 08:58:35,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:35,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2994 transitions. [2023-08-24 08:58:35,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 110.88888888888889) internal successors, (2994), 27 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states 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 08:58:35,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 407.0) internal successors, (11396), 28 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states 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 08:58:35,093 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 407.0) internal successors, (11396), 28 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states 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 08:58:35,094 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 236 flow. Second operand 27 states and 2994 transitions. [2023-08-24 08:58:35,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 239 transitions, 1650 flow [2023-08-24 08:58:35,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 239 transitions, 1540 flow, removed 43 selfloop flow, removed 5 redundant places. [2023-08-24 08:58:35,106 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 799 flow [2023-08-24 08:58:35,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=799, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2023-08-24 08:58:35,107 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 57 predicate places. [2023-08-24 08:58:35,107 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 799 flow [2023-08-24 08:58:35,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 104.84375) internal successors, (3355), 32 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states 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 08:58:35,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:35,109 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 08:58:35,121 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 08:58:35,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:35,314 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 08:58:35,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash -948320081, now seen corresponding path program 5 times [2023-08-24 08:58:35,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:35,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141975567] [2023-08-24 08:58:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:35,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:36,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141975567] [2023-08-24 08:58:36,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141975567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101955612] [2023-08-24 08:58:36,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:58:36,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:36,657 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 08:58:36,661 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 08:58:36,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:58:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:36,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 08:58:36,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:37,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:58:37,203 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 18 treesize of output 20 [2023-08-24 08:58:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:58:37,320 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 18 treesize of output 20 [2023-08-24 08:58:37,597 INFO L322 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2023-08-24 08:58:37,597 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 32 treesize of output 27 [2023-08-24 08:58:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:37,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:39,452 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q2_back~0 0) (let ((.cse4 (* c_~t~0 2)) (.cse6 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse2 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse7 (+ (* c_~q2_back~0 4) c_~q2~0.offset))) (and (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse5 (select .cse1 ~q2~0.base))) (let ((.cse3 (select .cse5 .cse7))) (let ((.cse0 (+ .cse3 1))) (or (< 0 .cse0) (< .cse0 (select (select .cse1 c_~q1~0.base) .cse2)) (<= (+ c_~s~0 .cse3) (+ .cse4 (* (select .cse5 .cse6) 2) 1)))))))) (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse11 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse8 (select .cse11 ~q2~0.base))) (let ((.cse9 (select .cse8 .cse7))) (let ((.cse10 (+ .cse9 1))) (or (< (+ .cse4 (* (select .cse8 .cse6) 2)) (+ c_~s~0 .cse9)) (< 0 .cse10) (< .cse10 (select (select .cse11 c_~q1~0.base) .cse2)))))))))) (<= c_~n2~0 c_~q2_back~0)) is different from false [2023-08-24 08:58:39,716 INFO L322 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-08-24 08:58:39,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3534 treesize of output 3238 [2023-08-24 08:58:39,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:39,871 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 1105 treesize of output 1080 [2023-08-24 08:58:39,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:39,935 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 1039 treesize of output 948 [2023-08-24 08:58:40,001 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:40,002 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 907 treesize of output 882 [2023-08-24 08:58:40,062 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:58:40,062 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 841 treesize of output 750 [2023-08-24 09:01:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:01:49,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101955612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:01:49,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:01:49,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-08-24 09:01:49,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267171278] [2023-08-24 09:01:49,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:01:49,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 09:01:49,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:01:49,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 09:01:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=878, Unknown=6, NotChecked=60, Total=1056 [2023-08-24 09:01:49,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 407 [2023-08-24 09:01:49,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 799 flow. Second operand has 33 states, 33 states have (on average 111.78787878787878) internal successors, (3689), 33 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states 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 09:01:49,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:01:49,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 407 [2023-08-24 09:01:49,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:01:56,676 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (< c_~q2_back~0 0)) (.cse13 (<= c_~n2~0 c_~q2_back~0)) (.cse5 (* c_~t~0 2)) (.cse7 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse8 (+ (* c_~q2_back~0 4) c_~q2~0.offset))) (and (or .cse0 (and (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse6 (select .cse2 ~q2~0.base))) (let ((.cse4 (select .cse6 .cse8))) (let ((.cse1 (+ .cse4 1))) (or (< 0 .cse1) (< .cse1 (select (select .cse2 c_~q1~0.base) .cse3)) (<= (+ c_~s~0 .cse4) (+ .cse5 (* (select .cse6 .cse7) 2) 1)))))))) (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse12 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse9 (select .cse12 ~q2~0.base))) (let ((.cse10 (select .cse9 .cse8))) (let ((.cse11 (+ .cse10 1))) (or (< (+ .cse5 (* (select .cse9 .cse7) 2)) (+ c_~s~0 .cse10)) (< 0 .cse11) (< .cse11 (select (select .cse12 c_~q1~0.base) .cse3))))))))) .cse13) (or .cse0 .cse13 (let ((.cse15 (select (select |c_#memory_int| c_~q1~0.base) .cse3))) (and (forall ((~q2~0.base Int)) (let ((.cse17 (select |c_#memory_int| ~q2~0.base))) (let ((.cse16 (select .cse17 .cse8))) (let ((.cse14 (+ .cse16 1))) (or (< 0 .cse14) (< .cse14 .cse15) (<= (+ c_~s~0 .cse16) (+ .cse5 (* 2 (select .cse17 .cse7)) 1))))))) (forall ((~q2~0.base Int)) (let ((.cse18 (select |c_#memory_int| ~q2~0.base))) (let ((.cse19 (select .cse18 .cse8))) (let ((.cse20 (+ .cse19 1))) (or (< (+ .cse5 (* 2 (select .cse18 .cse7))) (+ c_~s~0 .cse19)) (< 0 .cse20) (< .cse20 .cse15))))))))) (or .cse0 .cse13 (and (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse22 (select .cse24 ~q2~0.base))) (let ((.cse23 (select .cse22 .cse8))) (let ((.cse21 (+ .cse23 1))) (or (< 0 .cse21) (< (+ .cse5 (* (select .cse22 .cse7) 2)) (+ c_~s~0 .cse23)) (< .cse21 (select (select .cse24 c_~q1~0.base) .cse3)))))))) (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse27 (select .cse28 ~q2~0.base))) (let ((.cse26 (select .cse27 .cse8))) (let ((.cse25 (+ .cse26 1))) (or (< 0 .cse25) (<= (+ c_~s~0 .cse26) (+ .cse5 (* (select .cse27 .cse7) 2) 1)) (< .cse25 (select (select .cse28 c_~q1~0.base) .cse3)))))))))))) is different from false [2023-08-24 09:01:56,689 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (< c_~q2_back~0 0)) (.cse1 (<= c_~n2~0 c_~q2_back~0)) (.cse5 (* c_~t~0 2)) (.cse7 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse12 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse8 (+ (* c_~q2_back~0 4) c_~q2~0.offset))) (and (or .cse0 .cse1 (let ((.cse3 (select (select |c_#memory_int| c_~q1~0.base) .cse12))) (and (forall ((~q2~0.base Int)) (let ((.cse6 (select |c_#memory_int| ~q2~0.base))) (let ((.cse4 (select .cse6 .cse8))) (let ((.cse2 (+ .cse4 1))) (or (< 0 .cse2) (< .cse2 .cse3) (<= (+ c_~s~0 .cse4) (+ .cse5 (* 2 (select .cse6 .cse7)) 1))))))) (forall ((~q2~0.base Int)) (let ((.cse9 (select |c_#memory_int| ~q2~0.base))) (let ((.cse10 (select .cse9 .cse8))) (let ((.cse11 (+ .cse10 1))) (or (< (+ .cse5 (* 2 (select .cse9 .cse7))) (+ c_~s~0 .cse10)) (< 0 .cse11) (< .cse11 .cse3))))))))) (or .cse0 .cse1 (and (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse14 (select .cse16 ~q2~0.base))) (let ((.cse15 (select .cse14 .cse8))) (let ((.cse13 (+ .cse15 1))) (or (< 0 .cse13) (< (+ .cse5 (* (select .cse14 .cse7) 2)) (+ c_~s~0 .cse15)) (< .cse13 (select (select .cse16 c_~q1~0.base) .cse12)))))))) (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse20 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse19 (select .cse20 ~q2~0.base))) (let ((.cse18 (select .cse19 .cse8))) (let ((.cse17 (+ .cse18 1))) (or (< 0 .cse17) (<= (+ c_~s~0 .cse18) (+ .cse5 (* (select .cse19 .cse7) 2) 1)) (< .cse17 (select (select .cse20 c_~q1~0.base) .cse12)))))))))))) is different from false [2023-08-24 09:01:58,033 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse0 (< c_~q2_back~0 0)) (.cse13 (<= c_~n2~0 c_~q2_back~0)) (.cse8 (+ (* c_~q2_back~0 4) c_~q2~0.offset)) (.cse5 (* c_~t~0 2)) (.cse7 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (or .cse0 (and (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse6 (select .cse2 ~q2~0.base))) (let ((.cse4 (select .cse6 .cse8))) (let ((.cse1 (+ .cse4 1))) (or (< 0 .cse1) (< .cse1 (select (select .cse2 c_~q1~0.base) .cse3)) (<= (+ c_~s~0 .cse4) (+ .cse5 (* (select .cse6 .cse7) 2) 1)))))))) (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse12 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse9 (select .cse12 ~q2~0.base))) (let ((.cse10 (select .cse9 .cse8))) (let ((.cse11 (+ .cse10 1))) (or (< (+ .cse5 (* (select .cse9 .cse7) 2)) (+ c_~s~0 .cse10)) (< 0 .cse11) (< .cse11 (select (select .cse12 c_~q1~0.base) .cse3))))))))) .cse13) (or .cse0 .cse13 (let ((.cse15 (select (select |c_#memory_int| c_~q1~0.base) .cse3))) (and (forall ((~q2~0.base Int)) (let ((.cse17 (select |c_#memory_int| ~q2~0.base))) (let ((.cse16 (select .cse17 .cse8))) (let ((.cse14 (+ .cse16 1))) (or (< 0 .cse14) (< .cse14 .cse15) (<= (+ c_~s~0 .cse16) (+ .cse5 (* 2 (select .cse17 .cse7)) 1))))))) (forall ((~q2~0.base Int)) (let ((.cse18 (select |c_#memory_int| ~q2~0.base))) (let ((.cse19 (select .cse18 .cse8))) (let ((.cse20 (+ .cse19 1))) (or (< (+ .cse5 (* 2 (select .cse18 .cse7))) (+ c_~s~0 .cse19)) (< 0 .cse20) (< .cse20 .cse15))))))))) (or .cse0 .cse13 (and (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse22 (select .cse24 ~q2~0.base))) (let ((.cse23 (select .cse22 .cse8))) (let ((.cse21 (+ .cse23 1))) (or (< 0 .cse21) (< (+ .cse5 (* (select .cse22 .cse7) 2)) (+ c_~s~0 .cse23)) (< .cse21 (select (select .cse24 c_~q1~0.base) .cse3)))))))) (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse27 (select .cse28 ~q2~0.base))) (let ((.cse26 (select .cse27 .cse8))) (let ((.cse25 (+ .cse26 1))) (or (< 0 .cse25) (<= (+ c_~s~0 .cse26) (+ .cse5 (* (select .cse27 .cse7) 2) 1)) (< .cse25 (select (select .cse28 c_~q1~0.base) .cse3)))))))))) (or .cse0 .cse13 (let ((.cse29 (+ c_~s~0 |c_thread2Thread1of1ForFork2_~j~0#1|))) (and (forall ((~q2~0.base Int)) (let ((.cse30 (select |c_#memory_int| ~q2~0.base))) (or (<= .cse29 (+ .cse5 2 (* 2 (select .cse30 .cse7)))) (not (= |c_thread2Thread1of1ForFork2_~j~0#1| (+ (select .cse30 .cse8) 1)))))) (forall ((~q2~0.base Int)) (let ((.cse31 (select |c_#memory_int| ~q2~0.base))) (or (not (= |c_thread2Thread1of1ForFork2_~j~0#1| (+ (select .cse31 .cse8) 1))) (< (+ .cse5 (* 2 (select .cse31 .cse7)) 1) .cse29)))))) (< 0 |c_thread2Thread1of1ForFork2_~j~0#1|)))) is different from false [2023-08-24 09:02:04,800 INFO L124 PetriNetUnfolderBase]: 1501/2492 cut-off events. [2023-08-24 09:02:04,800 INFO L125 PetriNetUnfolderBase]: For 7850/7850 co-relation queries the response was YES. [2023-08-24 09:02:04,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11280 conditions, 2492 events. 1501/2492 cut-off events. For 7850/7850 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13182 event pairs, 81 based on Foata normal form. 2/2233 useless extension candidates. Maximal degree in co-relation 11250. Up to 783 conditions per place. [2023-08-24 09:02:04,823 INFO L140 encePairwiseOnDemand]: 387/407 looper letters, 157 selfloop transitions, 179 changer transitions 37/375 dead transitions. [2023-08-24 09:02:04,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 375 transitions, 3483 flow [2023-08-24 09:02:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 09:02:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 09:02:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3657 transitions. [2023-08-24 09:02:04,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28984703178251564 [2023-08-24 09:02:04,834 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3657 transitions. [2023-08-24 09:02:04,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3657 transitions. [2023-08-24 09:02:04,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:04,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3657 transitions. [2023-08-24 09:02:04,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 117.96774193548387) internal successors, (3657), 31 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states 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 09:02:04,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 407.0) internal successors, (13024), 32 states have internal predecessors, (13024), 0 states have call successors, (0), 0 states 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 09:02:04,860 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 407.0) internal successors, (13024), 32 states have internal predecessors, (13024), 0 states have call successors, (0), 0 states 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 09:02:04,860 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 799 flow. Second operand 31 states and 3657 transitions. [2023-08-24 09:02:04,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 375 transitions, 3483 flow [2023-08-24 09:02:04,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 375 transitions, 2939 flow, removed 268 selfloop flow, removed 7 redundant places. [2023-08-24 09:02:04,929 INFO L231 Difference]: Finished difference. Result has 126 places, 239 transitions, 2468 flow [2023-08-24 09:02:04,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2468, PETRI_PLACES=126, PETRI_TRANSITIONS=239} [2023-08-24 09:02:04,930 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 94 predicate places. [2023-08-24 09:02:04,930 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 239 transitions, 2468 flow [2023-08-24 09:02:04,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 111.78787878787878) internal successors, (3689), 33 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states 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 09:02:04,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:04,932 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, 1] [2023-08-24 09:02:04,944 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 09:02:05,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:05,137 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 09:02:05,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1119457505, now seen corresponding path program 6 times [2023-08-24 09:02:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18570605] [2023-08-24 09:02:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:05,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:02:07,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18570605] [2023-08-24 09:02:07,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18570605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583954775] [2023-08-24 09:02:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:02:07,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:07,120 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 09:02:07,123 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 09:02:07,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 09:02:07,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:02:07,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 09:02:07,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:07,350 INFO L322 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2023-08-24 09:02:07,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 38 [2023-08-24 09:02:07,421 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:02:07,421 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 11 treesize of output 11 [2023-08-24 09:02:07,681 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 09:02:07,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 40 [2023-08-24 09:02:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:02:07,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:02:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583954775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:02:07,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:02:07,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 09:02:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640570431] [2023-08-24 09:02:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:02:07,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 09:02:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 09:02:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:02:07,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 407 [2023-08-24 09:02:07,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 239 transitions, 2468 flow. Second operand has 10 states, 10 states have (on average 132.2) internal successors, (1322), 10 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states 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 09:02:07,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:07,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 407 [2023-08-24 09:02:07,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:08,452 INFO L124 PetriNetUnfolderBase]: 1439/2380 cut-off events. [2023-08-24 09:02:08,453 INFO L125 PetriNetUnfolderBase]: For 17429/17429 co-relation queries the response was YES. [2023-08-24 09:02:08,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14877 conditions, 2380 events. 1439/2380 cut-off events. For 17429/17429 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12349 event pairs, 153 based on Foata normal form. 1/2274 useless extension candidates. Maximal degree in co-relation 14833. Up to 2062 conditions per place. [2023-08-24 09:02:08,471 INFO L140 encePairwiseOnDemand]: 397/407 looper letters, 224 selfloop transitions, 19 changer transitions 37/282 dead transitions. [2023-08-24 09:02:08,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 282 transitions, 3307 flow [2023-08-24 09:02:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:02:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:02:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1110 transitions. [2023-08-24 09:02:08,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2023-08-24 09:02:08,475 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1110 transitions. [2023-08-24 09:02:08,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1110 transitions. [2023-08-24 09:02:08,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:08,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1110 transitions. [2023-08-24 09:02:08,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 09:02:08,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 09:02:08,483 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 09:02:08,483 INFO L175 Difference]: Start difference. First operand has 126 places, 239 transitions, 2468 flow. Second operand 8 states and 1110 transitions. [2023-08-24 09:02:08,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 282 transitions, 3307 flow [2023-08-24 09:02:08,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 282 transitions, 3018 flow, removed 122 selfloop flow, removed 12 redundant places. [2023-08-24 09:02:08,616 INFO L231 Difference]: Finished difference. Result has 120 places, 235 transitions, 2187 flow [2023-08-24 09:02:08,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2187, PETRI_PLACES=120, PETRI_TRANSITIONS=235} [2023-08-24 09:02:08,617 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 88 predicate places. [2023-08-24 09:02:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 235 transitions, 2187 flow [2023-08-24 09:02:08,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.2) internal successors, (1322), 10 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states 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 09:02:08,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:08,618 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, 1] [2023-08-24 09:02:08,626 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 09:02:08,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:08,819 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 09:02:08,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1096019765, now seen corresponding path program 7 times [2023-08-24 09:02:08,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:08,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726075754] [2023-08-24 09:02:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:08,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:02:11,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:11,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726075754] [2023-08-24 09:02:11,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726075754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:11,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541563709] [2023-08-24 09:02:11,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:02:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:11,229 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 09:02:11,254 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 09:02:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:11,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 09:02:11,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:11,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:02:11,941 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 18 treesize of output 20 [2023-08-24 09:02:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:02:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:02:12,203 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:02:12,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 treesize of output 34 [2023-08-24 09:02:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:02:12,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:02:12,599 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q2_back~0 0) (let ((.cse2 (+ c_~s~0 |c_thread2Thread1of1ForFork2_~j~0#1|)) (.cse0 (* c_~t~0 2)) (.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_437 (Array Int Int))) (< (+ .cse0 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~q2~0.base) .cse1)) 1) .cse2)) (forall ((v_ArrVal_437 (Array Int Int))) (<= .cse2 (+ .cse0 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~q2~0.base) .cse1)) 2))))) (<= c_~n2~0 c_~q2_back~0) (not (= |c_thread2Thread1of1ForFork2_~j~0#1| (+ (select (select |c_#memory_int| c_~q2~0.base) (+ (* c_~q2_back~0 4) c_~q2~0.offset)) 1)))) is different from false [2023-08-24 09:02:13,042 INFO L322 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-08-24 09:02:13,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1058 treesize of output 930 [2023-08-24 09:02:13,100 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:02:13,101 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 369 treesize of output 368 [2023-08-24 09:02:13,149 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:02:13,150 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 327 treesize of output 326 [2023-08-24 09:02:13,171 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 285 treesize of output 273 [2023-08-24 09:02:13,187 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 273 treesize of output 261 [2023-08-24 09:02:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:02:19,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541563709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:02:19,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:02:19,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2023-08-24 09:02:19,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799197745] [2023-08-24 09:02:19,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:02:19,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:02:19,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:19,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:02:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=932, Unknown=30, NotChecked=62, Total=1122 [2023-08-24 09:02:19,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 407 [2023-08-24 09:02:19,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 235 transitions, 2187 flow. Second operand has 34 states, 34 states have (on average 107.79411764705883) internal successors, (3665), 34 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states 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 09:02:19,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:19,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 407 [2023-08-24 09:02:19,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:21,568 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse0 (< c_~q2_back~0 0)) (.cse9 (<= c_~n2~0 c_~q2_back~0)) (.cse4 (* c_~t~0 2)) (.cse3 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse6 (+ (* c_~q2_back~0 4) c_~q2~0.offset))) (and (or .cse0 (and (forall ((v_ArrVal_436 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_436))) (let ((.cse1 (select (select .cse2 c_~q2~0.base) .cse6))) (or (forall ((v_ArrVal_437 (Array Int Int))) (<= (+ c_~s~0 .cse1) (+ (* 2 (select (select (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~q2~0.base) .cse3)) .cse4 1))) (not (= (+ .cse1 1) (select (select .cse2 c_~q1~0.base) .cse5))))))) (forall ((v_ArrVal_436 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_436))) (let ((.cse7 (select (select .cse8 c_~q2~0.base) .cse6))) (or (not (= (+ .cse7 1) (select (select .cse8 c_~q1~0.base) .cse5))) (forall ((v_ArrVal_437 (Array Int Int))) (< (+ (* 2 (select (select (store .cse8 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~q2~0.base) .cse3)) .cse4) (+ c_~s~0 .cse7)))))))) .cse9) (let ((.cse10 (select (select |c_#memory_int| c_~q2~0.base) .cse6))) (or (not (= (select (select |c_#memory_int| c_~q1~0.base) .cse5) (+ .cse10 1))) .cse0 .cse9 (let ((.cse11 (+ c_~s~0 .cse10))) (and (forall ((v_ArrVal_437 (Array Int Int))) (< (+ .cse4 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~q2~0.base) .cse3))) .cse11)) (forall ((v_ArrVal_437 (Array Int Int))) (<= .cse11 (+ .cse4 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~q2~0.base) .cse3)) 1))))))))) is different from false [2023-08-24 09:02:24,919 INFO L124 PetriNetUnfolderBase]: 1579/2700 cut-off events. [2023-08-24 09:02:24,920 INFO L125 PetriNetUnfolderBase]: For 20013/20013 co-relation queries the response was YES. [2023-08-24 09:02:24,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15734 conditions, 2700 events. 1579/2700 cut-off events. For 20013/20013 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15230 event pairs, 111 based on Foata normal form. 32/2573 useless extension candidates. Maximal degree in co-relation 15693. Up to 1277 conditions per place. [2023-08-24 09:02:24,938 INFO L140 encePairwiseOnDemand]: 386/407 looper letters, 159 selfloop transitions, 131 changer transitions 99/391 dead transitions. [2023-08-24 09:02:24,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 391 transitions, 4231 flow [2023-08-24 09:02:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 09:02:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 09:02:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2929 transitions. [2023-08-24 09:02:24,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2767907767907768 [2023-08-24 09:02:24,946 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2929 transitions. [2023-08-24 09:02:24,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2929 transitions. [2023-08-24 09:02:24,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:24,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2929 transitions. [2023-08-24 09:02:24,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 112.65384615384616) internal successors, (2929), 26 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states 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 09:02:24,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 407.0) internal successors, (10989), 27 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states 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 09:02:24,964 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 407.0) internal successors, (10989), 27 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states 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 09:02:24,964 INFO L175 Difference]: Start difference. First operand has 120 places, 235 transitions, 2187 flow. Second operand 26 states and 2929 transitions. [2023-08-24 09:02:24,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 391 transitions, 4231 flow [2023-08-24 09:02:25,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 391 transitions, 4127 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-08-24 09:02:25,065 INFO L231 Difference]: Finished difference. Result has 147 places, 250 transitions, 2787 flow [2023-08-24 09:02:25,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2787, PETRI_PLACES=147, PETRI_TRANSITIONS=250} [2023-08-24 09:02:25,066 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 115 predicate places. [2023-08-24 09:02:25,066 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 250 transitions, 2787 flow [2023-08-24 09:02:25,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 107.79411764705883) internal successors, (3665), 34 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states 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 09:02:25,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:25,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:02:25,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 09:02:25,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:25,272 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 09:02:25,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1569922566, now seen corresponding path program 1 times [2023-08-24 09:02:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:25,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163035411] [2023-08-24 09:02:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:25,401 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 09:02:25,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163035411] [2023-08-24 09:02:25,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163035411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115555196] [2023-08-24 09:02:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:25,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:25,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:25,403 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 09:02:25,406 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 09:02:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:25,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:02:25,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:02:25,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:02:25,693 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 09:02:25,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115555196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:02:25,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:02:25,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 09:02:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4003915] [2023-08-24 09:02:25,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:02:25,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 09:02:25,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:25,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 09:02:25,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:02:25,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 407 [2023-08-24 09:02:25,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 250 transitions, 2787 flow. Second operand has 12 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 09:02:25,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:25,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 407 [2023-08-24 09:02:25,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:26,208 INFO L124 PetriNetUnfolderBase]: 1065/1801 cut-off events. [2023-08-24 09:02:26,208 INFO L125 PetriNetUnfolderBase]: For 22824/22878 co-relation queries the response was YES. [2023-08-24 09:02:26,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12680 conditions, 1801 events. 1065/1801 cut-off events. For 22824/22878 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8909 event pairs, 220 based on Foata normal form. 223/1890 useless extension candidates. Maximal degree in co-relation 12630. Up to 1103 conditions per place. [2023-08-24 09:02:26,231 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 146 selfloop transitions, 5 changer transitions 50/207 dead transitions. [2023-08-24 09:02:26,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 207 transitions, 2637 flow [2023-08-24 09:02:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:02:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:02:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 955 transitions. [2023-08-24 09:02:26,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39107289107289106 [2023-08-24 09:02:26,235 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 955 transitions. [2023-08-24 09:02:26,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 955 transitions. [2023-08-24 09:02:26,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:26,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 955 transitions. [2023-08-24 09:02:26,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.16666666666666) internal successors, (955), 6 states have internal predecessors, (955), 0 states have call successors, (0), 0 states 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 09:02:26,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states 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 09:02:26,240 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states 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 09:02:26,240 INFO L175 Difference]: Start difference. First operand has 147 places, 250 transitions, 2787 flow. Second operand 6 states and 955 transitions. [2023-08-24 09:02:26,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 207 transitions, 2637 flow [2023-08-24 09:02:26,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 207 transitions, 2434 flow, removed 87 selfloop flow, removed 13 redundant places. [2023-08-24 09:02:26,325 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 1341 flow [2023-08-24 09:02:26,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1341, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2023-08-24 09:02:26,325 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 97 predicate places. [2023-08-24 09:02:26,325 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 1341 flow [2023-08-24 09:02:26,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 09:02:26,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:26,326 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, 1, 1] [2023-08-24 09:02:26,334 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 09:02:26,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:26,532 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 09:02:26,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 648703942, now seen corresponding path program 1 times [2023-08-24 09:02:26,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:26,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775548262] [2023-08-24 09:02:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:26,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:02:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775548262] [2023-08-24 09:02:26,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775548262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:26,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241821764] [2023-08-24 09:02:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:26,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:26,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:26,649 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 09:02:26,668 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 09:02:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:26,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:02:26,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:02:26,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:02:26,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241821764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:02:26,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:02:26,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-24 09:02:26,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591384389] [2023-08-24 09:02:26,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:02:26,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:02:26,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:02:26,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:02:26,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 09:02:26,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 1341 flow. Second operand has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 09:02:26,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:26,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 09:02:26,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:27,199 INFO L124 PetriNetUnfolderBase]: 1443/2319 cut-off events. [2023-08-24 09:02:27,199 INFO L125 PetriNetUnfolderBase]: For 17749/17773 co-relation queries the response was YES. [2023-08-24 09:02:27,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14695 conditions, 2319 events. 1443/2319 cut-off events. For 17749/17773 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11155 event pairs, 126 based on Foata normal form. 144/2241 useless extension candidates. Maximal degree in co-relation 14651. Up to 915 conditions per place. [2023-08-24 09:02:27,214 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 138 selfloop transitions, 26 changer transitions 8/178 dead transitions. [2023-08-24 09:02:27,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 178 transitions, 2163 flow [2023-08-24 09:02:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:02:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:02:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 756 transitions. [2023-08-24 09:02:27,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643734643734644 [2023-08-24 09:02:27,216 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 756 transitions. [2023-08-24 09:02:27,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 756 transitions. [2023-08-24 09:02:27,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:27,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 756 transitions. [2023-08-24 09:02:27,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states 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 09:02:27,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 09:02:27,219 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 09:02:27,219 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 1341 flow. Second operand 4 states and 756 transitions. [2023-08-24 09:02:27,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 178 transitions, 2163 flow [2023-08-24 09:02:27,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 178 transitions, 2008 flow, removed 40 selfloop flow, removed 13 redundant places. [2023-08-24 09:02:27,290 INFO L231 Difference]: Finished difference. Result has 113 places, 133 transitions, 1411 flow [2023-08-24 09:02:27,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1411, PETRI_PLACES=113, PETRI_TRANSITIONS=133} [2023-08-24 09:02:27,291 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 81 predicate places. [2023-08-24 09:02:27,291 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 133 transitions, 1411 flow [2023-08-24 09:02:27,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 09:02:27,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:27,291 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 09:02:27,300 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 09:02:27,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 09:02:27,497 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 09:02:27,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash -629560345, now seen corresponding path program 8 times [2023-08-24 09:02:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:27,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902053908] [2023-08-24 09:02:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:27,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:02:29,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:29,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902053908] [2023-08-24 09:02:29,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902053908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:29,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105367402] [2023-08-24 09:02:29,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:02:29,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:29,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:29,257 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 09:02:29,285 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 09:02:29,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 09:02:29,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:02:29,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-24 09:02:29,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:29,443 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:02:29,443 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 09:02:29,699 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:02:29,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:02:29,859 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 18 treesize of output 20 [2023-08-24 09:02:29,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:02:29,919 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 18 treesize of output 20 [2023-08-24 09:02:30,110 INFO L322 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2023-08-24 09:02:30,110 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 36 treesize of output 29 [2023-08-24 09:02:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:02:30,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:02:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105367402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:02:30,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:02:30,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 21 [2023-08-24 09:02:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659422845] [2023-08-24 09:02:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:02:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 09:02:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 09:02:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:02:30,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 407 [2023-08-24 09:02:30,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 133 transitions, 1411 flow. Second operand has 11 states, 11 states have (on average 135.0) internal successors, (1485), 11 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states 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 09:02:30,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:30,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 407 [2023-08-24 09:02:30,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:30,828 INFO L124 PetriNetUnfolderBase]: 1443/2312 cut-off events. [2023-08-24 09:02:30,828 INFO L125 PetriNetUnfolderBase]: For 16784/16784 co-relation queries the response was YES. [2023-08-24 09:02:30,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14743 conditions, 2312 events. 1443/2312 cut-off events. For 16784/16784 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10933 event pairs, 221 based on Foata normal form. 7/2110 useless extension candidates. Maximal degree in co-relation 14704. Up to 2079 conditions per place. [2023-08-24 09:02:30,843 INFO L140 encePairwiseOnDemand]: 396/407 looper letters, 121 selfloop transitions, 28 changer transitions 14/165 dead transitions. [2023-08-24 09:02:30,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 165 transitions, 2020 flow [2023-08-24 09:02:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:02:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:02:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1128 transitions. [2023-08-24 09:02:30,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3464373464373464 [2023-08-24 09:02:30,846 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1128 transitions. [2023-08-24 09:02:30,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1128 transitions. [2023-08-24 09:02:30,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:30,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1128 transitions. [2023-08-24 09:02:30,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 09:02:30,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 09:02:30,850 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states 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 09:02:30,851 INFO L175 Difference]: Start difference. First operand has 113 places, 133 transitions, 1411 flow. Second operand 8 states and 1128 transitions. [2023-08-24 09:02:30,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 165 transitions, 2020 flow [2023-08-24 09:02:30,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1883 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-08-24 09:02:30,889 INFO L231 Difference]: Finished difference. Result has 112 places, 135 transitions, 1410 flow [2023-08-24 09:02:30,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1410, PETRI_PLACES=112, PETRI_TRANSITIONS=135} [2023-08-24 09:02:30,889 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 80 predicate places. [2023-08-24 09:02:30,889 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 135 transitions, 1410 flow [2023-08-24 09:02:30,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.0) internal successors, (1485), 11 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states 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 09:02:30,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:30,890 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, 1, 1] [2023-08-24 09:02:30,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 09:02:31,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 09:02:31,095 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 09:02:31,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:31,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1833277868, now seen corresponding path program 2 times [2023-08-24 09:02:31,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:31,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884396735] [2023-08-24 09:02:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:31,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:31,576 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 09:02:31,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884396735] [2023-08-24 09:02:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884396735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580123466] [2023-08-24 09:02:31,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:02:31,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:31,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:31,577 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 09:02:31,603 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 09:02:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:02:31,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:02:31,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 09:02:31,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:32,253 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 09:02:32,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:02:32,513 INFO L322 Elim1Store]: treesize reduction 13, result has 86.0 percent of original size [2023-08-24 09:02:32,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 105 [2023-08-24 09:02:32,772 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 09:02:32,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580123466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:02:32,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:02:32,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 24 [2023-08-24 09:02:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788705471] [2023-08-24 09:02:32,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:02:32,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:02:32,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:32,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:02:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:02:32,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 407 [2023-08-24 09:02:32,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 1410 flow. Second operand has 25 states, 25 states have (on average 122.6) internal successors, (3065), 25 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states 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 09:02:32,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:32,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 407 [2023-08-24 09:02:32,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:35,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 09:02:38,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:02:39,565 INFO L124 PetriNetUnfolderBase]: 5188/7806 cut-off events. [2023-08-24 09:02:39,565 INFO L125 PetriNetUnfolderBase]: For 42115/42115 co-relation queries the response was YES. [2023-08-24 09:02:39,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45160 conditions, 7806 events. 5188/7806 cut-off events. For 42115/42115 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43031 event pairs, 340 based on Foata normal form. 134/6670 useless extension candidates. Maximal degree in co-relation 45123. Up to 2417 conditions per place. [2023-08-24 09:02:39,624 INFO L140 encePairwiseOnDemand]: 394/407 looper letters, 371 selfloop transitions, 285 changer transitions 28/686 dead transitions. [2023-08-24 09:02:39,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 686 transitions, 8223 flow [2023-08-24 09:02:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:02:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:02:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4680 transitions. [2023-08-24 09:02:39,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3194103194103194 [2023-08-24 09:02:39,630 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4680 transitions. [2023-08-24 09:02:39,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4680 transitions. [2023-08-24 09:02:39,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:39,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4680 transitions. [2023-08-24 09:02:39,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 130.0) internal successors, (4680), 36 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 09:02:39,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 407.0) internal successors, (15059), 37 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states 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 09:02:39,648 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 407.0) internal successors, (15059), 37 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states 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 09:02:39,648 INFO L175 Difference]: Start difference. First operand has 112 places, 135 transitions, 1410 flow. Second operand 36 states and 4680 transitions. [2023-08-24 09:02:39,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 686 transitions, 8223 flow [2023-08-24 09:02:39,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 686 transitions, 8133 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-24 09:02:39,777 INFO L231 Difference]: Finished difference. Result has 167 places, 424 transitions, 5793 flow [2023-08-24 09:02:39,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5793, PETRI_PLACES=167, PETRI_TRANSITIONS=424} [2023-08-24 09:02:39,778 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 135 predicate places. [2023-08-24 09:02:39,778 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 424 transitions, 5793 flow [2023-08-24 09:02:39,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 122.6) internal successors, (3065), 25 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states 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 09:02:39,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:39,779 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, 1, 1] [2023-08-24 09:02:39,784 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 09:02:39,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 09:02:39,984 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 09:02:39,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1757154850, now seen corresponding path program 3 times [2023-08-24 09:02:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180796752] [2023-08-24 09:02:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:39,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:40,694 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 09:02:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:40,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180796752] [2023-08-24 09:02:40,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180796752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:40,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515616961] [2023-08-24 09:02:40,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:02:40,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:40,696 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 09:02:40,721 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 09:02:40,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:02:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:02:40,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 09:02:40,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:02:41,328 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 16 treesize of output 18 [2023-08-24 09:02:41,447 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 09:02:41,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:02:41,783 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:02:41,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 240 [2023-08-24 09:02:41,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:02:41,816 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 117 treesize of output 115 [2023-08-24 09:02:42,620 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 09:02:42,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515616961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:02:42,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:02:42,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 27 [2023-08-24 09:02:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335437516] [2023-08-24 09:02:42,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:02:42,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 09:02:42,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 09:02:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=646, Unknown=9, NotChecked=0, Total=756 [2023-08-24 09:02:42,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 407 [2023-08-24 09:02:42,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 424 transitions, 5793 flow. Second operand has 28 states, 28 states have (on average 118.32142857142857) internal successors, (3313), 28 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states 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 09:02:42,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:42,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 407 [2023-08-24 09:02:42,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:49,753 WARN L234 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 79 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:02:53,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:02:59,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:03:03,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:03:05,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:03:08,073 INFO L124 PetriNetUnfolderBase]: 10256/15269 cut-off events. [2023-08-24 09:03:08,073 INFO L125 PetriNetUnfolderBase]: For 265188/265194 co-relation queries the response was YES. [2023-08-24 09:03:08,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129242 conditions, 15269 events. 10256/15269 cut-off events. For 265188/265194 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 91840 event pairs, 662 based on Foata normal form. 378/13349 useless extension candidates. Maximal degree in co-relation 129181. Up to 4770 conditions per place. [2023-08-24 09:03:08,227 INFO L140 encePairwiseOnDemand]: 392/407 looper letters, 603 selfloop transitions, 387 changer transitions 32/1024 dead transitions. [2023-08-24 09:03:08,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 1024 transitions, 16587 flow [2023-08-24 09:03:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:03:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:03:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4479 transitions. [2023-08-24 09:03:08,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3056920556920557 [2023-08-24 09:03:08,232 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4479 transitions. [2023-08-24 09:03:08,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4479 transitions. [2023-08-24 09:03:08,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:03:08,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4479 transitions. [2023-08-24 09:03:08,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 124.41666666666667) internal successors, (4479), 36 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states 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 09:03:08,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 407.0) internal successors, (15059), 37 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states 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 09:03:08,250 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 407.0) internal successors, (15059), 37 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states 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 09:03:08,250 INFO L175 Difference]: Start difference. First operand has 167 places, 424 transitions, 5793 flow. Second operand 36 states and 4479 transitions. [2023-08-24 09:03:08,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 1024 transitions, 16587 flow [2023-08-24 09:03:09,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1024 transitions, 15909 flow, removed 335 selfloop flow, removed 3 redundant places. [2023-08-24 09:03:10,006 INFO L231 Difference]: Finished difference. Result has 220 places, 692 transitions, 11238 flow [2023-08-24 09:03:10,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11238, PETRI_PLACES=220, PETRI_TRANSITIONS=692} [2023-08-24 09:03:10,007 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 188 predicate places. [2023-08-24 09:03:10,007 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 692 transitions, 11238 flow [2023-08-24 09:03:10,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 118.32142857142857) internal successors, (3313), 28 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states 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 09:03:10,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:03:10,008 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, 1, 1] [2023-08-24 09:03:10,012 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 09:03:10,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 09:03:10,208 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 09:03:10,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:03:10,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1997374654, now seen corresponding path program 4 times [2023-08-24 09:03:10,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:03:10,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488583384] [2023-08-24 09:03:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:03:10,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:03:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:03:11,006 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 09:03:11,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:03:11,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488583384] [2023-08-24 09:03:11,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488583384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:03:11,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143018639] [2023-08-24 09:03:11,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:03:11,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:03:11,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:03:11,008 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 09:03:11,009 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 09:03:11,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:03:11,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:03:11,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 09:03:11,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:03:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:03:11,367 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 18 treesize of output 20 [2023-08-24 09:03:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:03:11,446 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 18 treesize of output 20 [2023-08-24 09:03:11,524 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 11 treesize of output 3 [2023-08-24 09:03:11,553 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 09:03:11,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:03:11,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:03:11,741 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 158 treesize of output 142 [2023-08-24 09:03:11,745 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 28 treesize of output 16 [2023-08-24 09:03:11,750 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 27 treesize of output 21 [2023-08-24 09:03:11,969 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 09:03:11,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143018639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:03:11,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:03:11,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2023-08-24 09:03:11,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482353213] [2023-08-24 09:03:11,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:03:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:03:11,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:03:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:03:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=535, Unknown=5, NotChecked=0, Total=650 [2023-08-24 09:03:11,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 407 [2023-08-24 09:03:11,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 692 transitions, 11238 flow. Second operand has 26 states, 26 states have (on average 125.15384615384616) internal successors, (3254), 26 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states 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 09:03:11,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:03:11,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 407 [2023-08-24 09:03:11,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:03:19,930 INFO L124 PetriNetUnfolderBase]: 14149/21457 cut-off events. [2023-08-24 09:03:19,930 INFO L125 PetriNetUnfolderBase]: For 545860/545864 co-relation queries the response was YES. [2023-08-24 09:03:20,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205461 conditions, 21457 events. 14149/21457 cut-off events. For 545860/545864 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 140835 event pairs, 921 based on Foata normal form. 432/19374 useless extension candidates. Maximal degree in co-relation 205378. Up to 6569 conditions per place. [2023-08-24 09:03:20,159 INFO L140 encePairwiseOnDemand]: 393/407 looper letters, 1022 selfloop transitions, 533 changer transitions 8/1565 dead transitions. [2023-08-24 09:03:20,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1565 transitions, 28409 flow [2023-08-24 09:03:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 09:03:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 09:03:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5019 transitions. [2023-08-24 09:03:20,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3245182982025087 [2023-08-24 09:03:20,165 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5019 transitions. [2023-08-24 09:03:20,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5019 transitions. [2023-08-24 09:03:20,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:03:20,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5019 transitions. [2023-08-24 09:03:20,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 132.07894736842104) internal successors, (5019), 38 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states 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 09:03:20,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 407.0) internal successors, (15873), 39 states have internal predecessors, (15873), 0 states have call successors, (0), 0 states 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 09:03:20,183 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 407.0) internal successors, (15873), 39 states have internal predecessors, (15873), 0 states have call successors, (0), 0 states 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 09:03:20,183 INFO L175 Difference]: Start difference. First operand has 220 places, 692 transitions, 11238 flow. Second operand 38 states and 5019 transitions. [2023-08-24 09:03:20,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1565 transitions, 28409 flow [2023-08-24 09:03:25,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1565 transitions, 27160 flow, removed 610 selfloop flow, removed 10 redundant places. [2023-08-24 09:03:25,882 INFO L231 Difference]: Finished difference. Result has 262 places, 1004 transitions, 18202 flow [2023-08-24 09:03:25,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=10621, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=18202, PETRI_PLACES=262, PETRI_TRANSITIONS=1004} [2023-08-24 09:03:25,883 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2023-08-24 09:03:25,883 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1004 transitions, 18202 flow [2023-08-24 09:03:25,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 125.15384615384616) internal successors, (3254), 26 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states 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 09:03:25,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:03:25,884 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, 1, 1] [2023-08-24 09:03:25,888 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 09:03:26,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 09:03:26,085 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 09:03:26,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:03:26,085 INFO L85 PathProgramCache]: Analyzing trace with hash -185391844, now seen corresponding path program 5 times [2023-08-24 09:03:26,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:03:26,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133294253] [2023-08-24 09:03:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:03:26,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:03:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:03:26,711 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 09:03:26,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:03:26,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133294253] [2023-08-24 09:03:26,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133294253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:03:26,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262298816] [2023-08-24 09:03:26,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:03:26,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:03:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:03:26,712 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 09:03:26,714 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 09:03:26,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:03:26,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:03:26,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 09:03:26,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:03:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:03:27,018 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 18 treesize of output 20 [2023-08-24 09:03:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:03:27,064 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 18 treesize of output 20 [2023-08-24 09:03:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:03:27,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:03:27,165 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_846) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-08-24 09:03:27,239 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:03:27,239 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 158 treesize of output 142 [2023-08-24 09:03:27,247 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 27 treesize of output 21 [2023-08-24 09:03:27,269 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 28 treesize of output 16 [2023-08-24 09:03:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:03:27,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262298816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:03:27,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:03:27,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-24 09:03:27,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682760450] [2023-08-24 09:03:27,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:03:27,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:03:27,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:03:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:03:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=397, Unknown=1, NotChecked=40, Total=506 [2023-08-24 09:03:27,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 407 [2023-08-24 09:03:27,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1004 transitions, 18202 flow. Second operand has 23 states, 23 states have (on average 125.30434782608695) internal successors, (2882), 23 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states 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 09:03:27,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:03:27,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 407 [2023-08-24 09:03:27,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:03:33,882 INFO L124 PetriNetUnfolderBase]: 14011/21092 cut-off events. [2023-08-24 09:03:33,882 INFO L125 PetriNetUnfolderBase]: For 670655/670671 co-relation queries the response was YES. [2023-08-24 09:03:33,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212995 conditions, 21092 events. 14011/21092 cut-off events. For 670655/670671 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 134953 event pairs, 933 based on Foata normal form. 69/18970 useless extension candidates. Maximal degree in co-relation 212898. Up to 9199 conditions per place. [2023-08-24 09:03:34,099 INFO L140 encePairwiseOnDemand]: 399/407 looper letters, 807 selfloop transitions, 423 changer transitions 0/1232 dead transitions. [2023-08-24 09:03:34,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1232 transitions, 24548 flow [2023-08-24 09:03:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:03:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:03:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1701 transitions. [2023-08-24 09:03:34,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32148932148932147 [2023-08-24 09:03:34,102 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1701 transitions. [2023-08-24 09:03:34,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1701 transitions. [2023-08-24 09:03:34,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:03:34,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1701 transitions. [2023-08-24 09:03:34,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states 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 09:03:34,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 407.0) internal successors, (5698), 14 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states 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 09:03:34,109 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 407.0) internal successors, (5698), 14 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states 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 09:03:34,109 INFO L175 Difference]: Start difference. First operand has 262 places, 1004 transitions, 18202 flow. Second operand 13 states and 1701 transitions. [2023-08-24 09:03:34,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1232 transitions, 24548 flow [2023-08-24 09:03:41,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1232 transitions, 23510 flow, removed 317 selfloop flow, removed 21 redundant places. [2023-08-24 09:03:41,687 INFO L231 Difference]: Finished difference. Result has 244 places, 1029 transitions, 18439 flow [2023-08-24 09:03:41,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=16656, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18439, PETRI_PLACES=244, PETRI_TRANSITIONS=1029} [2023-08-24 09:03:41,688 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 212 predicate places. [2023-08-24 09:03:41,688 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 1029 transitions, 18439 flow [2023-08-24 09:03:41,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 125.30434782608695) internal successors, (2882), 23 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states 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 09:03:41,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:03:41,688 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, 1] [2023-08-24 09:03:41,694 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 09:03:41,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 09:03:41,894 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 09:03:41,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:03:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash -591754004, now seen corresponding path program 1 times [2023-08-24 09:03:41,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:03:41,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62131586] [2023-08-24 09:03:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:03:41,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:03:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:03:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:03:42,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:03:42,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62131586] [2023-08-24 09:03:42,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62131586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:03:42,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628055101] [2023-08-24 09:03:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:03:42,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:03:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:03:42,029 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 09:03:42,035 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 09:03:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:03:42,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:03:42,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:03:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:03:42,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 09:03:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628055101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:03:42,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 09:03:42,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-24 09:03:42,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164228633] [2023-08-24 09:03:42,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:03:42,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:03:42,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:03:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:03:42,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:03:42,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 09:03:42,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 1029 transitions, 18439 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 09:03:42,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:03:42,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 09:03:42,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:03:48,276 INFO L124 PetriNetUnfolderBase]: 15254/22913 cut-off events. [2023-08-24 09:03:48,276 INFO L125 PetriNetUnfolderBase]: For 706433/706615 co-relation queries the response was YES. [2023-08-24 09:03:48,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231786 conditions, 22913 events. 15254/22913 cut-off events. For 706433/706615 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 147891 event pairs, 1509 based on Foata normal form. 168/20575 useless extension candidates. Maximal degree in co-relation 231696. Up to 18125 conditions per place. [2023-08-24 09:03:48,553 INFO L140 encePairwiseOnDemand]: 403/407 looper letters, 1024 selfloop transitions, 155 changer transitions 51/1236 dead transitions. [2023-08-24 09:03:48,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1236 transitions, 24699 flow [2023-08-24 09:03:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:03:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:03:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-08-24 09:03:48,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668304668304668 [2023-08-24 09:03:48,554 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-08-24 09:03:48,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-08-24 09:03:48,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:03:48,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-08-24 09:03:48,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 09:03:48,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 09:03:48,556 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states 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 09:03:48,556 INFO L175 Difference]: Start difference. First operand has 244 places, 1029 transitions, 18439 flow. Second operand 4 states and 760 transitions. [2023-08-24 09:03:48,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1236 transitions, 24699 flow [2023-08-24 09:03:54,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1236 transitions, 24473 flow, removed 40 selfloop flow, removed 8 redundant places. [2023-08-24 09:03:54,825 INFO L231 Difference]: Finished difference. Result has 241 places, 1012 transitions, 18597 flow [2023-08-24 09:03:54,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=18245, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=881, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=18597, PETRI_PLACES=241, PETRI_TRANSITIONS=1012} [2023-08-24 09:03:54,826 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 209 predicate places. [2023-08-24 09:03:54,826 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 1012 transitions, 18597 flow [2023-08-24 09:03:54,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 09:03:54,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:03:54,826 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, 1, 1] [2023-08-24 09:03:54,830 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 09:03:55,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:03:55,027 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 09:03:55,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:03:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash -860411197, now seen corresponding path program 1 times [2023-08-24 09:03:55,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:03:55,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007629663] [2023-08-24 09:03:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:03:55,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:03:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:03:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:03:55,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:03:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007629663] [2023-08-24 09:03:55,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007629663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:03:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154059004] [2023-08-24 09:03:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:03:55,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:03:55,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:03:55,161 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 09:03:55,173 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 09:03:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:03:55,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:03:55,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:03:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:03:55,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:03:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:03:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154059004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:03:55,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:03:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 09:03:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304278275] [2023-08-24 09:03:55,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:03:55,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 09:03:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:03:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 09:03:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:03:55,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 407 [2023-08-24 09:03:55,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 1012 transitions, 18597 flow. Second operand has 12 states, 12 states have (on average 153.16666666666666) internal successors, (1838), 12 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states 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 09:03:55,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:03:55,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 407 [2023-08-24 09:03:55,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:04:03,699 INFO L124 PetriNetUnfolderBase]: 20028/30380 cut-off events. [2023-08-24 09:04:03,700 INFO L125 PetriNetUnfolderBase]: For 1015093/1015375 co-relation queries the response was YES. [2023-08-24 09:04:03,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314701 conditions, 30380 events. 20028/30380 cut-off events. For 1015093/1015375 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 207673 event pairs, 3932 based on Foata normal form. 1186/28357 useless extension candidates. Maximal degree in co-relation 314610. Up to 21123 conditions per place. [2023-08-24 09:04:04,108 INFO L140 encePairwiseOnDemand]: 400/407 looper letters, 923 selfloop transitions, 14 changer transitions 704/1646 dead transitions. [2023-08-24 09:04:04,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1646 transitions, 33624 flow [2023-08-24 09:04:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:04:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:04:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1403 transitions. [2023-08-24 09:04:04,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38301938301938304 [2023-08-24 09:04:04,110 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1403 transitions. [2023-08-24 09:04:04,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1403 transitions. [2023-08-24 09:04:04,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:04:04,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1403 transitions. [2023-08-24 09:04:04,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.88888888888889) internal successors, (1403), 9 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states 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 09:04:04,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states 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 09:04:04,114 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states 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 09:04:04,114 INFO L175 Difference]: Start difference. First operand has 241 places, 1012 transitions, 18597 flow. Second operand 9 states and 1403 transitions. [2023-08-24 09:04:04,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1646 transitions, 33624 flow [2023-08-24 09:04:16,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1646 transitions, 32393 flow, removed 411 selfloop flow, removed 13 redundant places. [2023-08-24 09:04:16,373 INFO L231 Difference]: Finished difference. Result has 215 places, 942 transitions, 17039 flow [2023-08-24 09:04:16,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=17921, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17039, PETRI_PLACES=215, PETRI_TRANSITIONS=942} [2023-08-24 09:04:16,374 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 183 predicate places. [2023-08-24 09:04:16,374 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 942 transitions, 17039 flow [2023-08-24 09:04:16,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.16666666666666) internal successors, (1838), 12 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states 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 09:04:16,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:04:16,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:04:16,379 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 09:04:16,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:04:16,575 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 09:04:16,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:04:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash 480477543, now seen corresponding path program 2 times [2023-08-24 09:04:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:04:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986069582] [2023-08-24 09:04:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:04:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:04:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:04:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:04:17,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:04:17,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986069582] [2023-08-24 09:04:17,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986069582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:04:17,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234709434] [2023-08-24 09:04:17,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:04:17,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:04:17,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:04:17,655 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 09:04:17,658 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 09:04:17,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:04:17,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:04:17,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 09:04:17,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:04:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:04:18,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:04:18,805 INFO L322 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-08-24 09:04:18,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2023-08-24 09:04:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:04:19,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234709434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:04:19,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:04:19,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-24 09:04:19,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644764481] [2023-08-24 09:04:19,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:04:19,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:04:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:04:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:04:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:04:19,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 407 [2023-08-24 09:04:19,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 942 transitions, 17039 flow. Second operand has 32 states, 32 states have (on average 123.25) internal successors, (3944), 32 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states 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 09:04:19,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:04:19,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 407 [2023-08-24 09:04:19,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:04:26,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:28,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:30,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:33,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 09:04:35,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:37,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:40,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:42,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:44,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:46,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:48,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:04:50,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:05:03,085 INFO L124 PetriNetUnfolderBase]: 23987/35728 cut-off events. [2023-08-24 09:05:03,085 INFO L125 PetriNetUnfolderBase]: For 1003763/1003765 co-relation queries the response was YES. [2023-08-24 09:05:04,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350819 conditions, 35728 events. 23987/35728 cut-off events. For 1003763/1003765 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 243124 event pairs, 740 based on Foata normal form. 0/33183 useless extension candidates. Maximal degree in co-relation 350737. Up to 13677 conditions per place. [2023-08-24 09:05:04,620 INFO L140 encePairwiseOnDemand]: 393/407 looper letters, 1289 selfloop transitions, 1340 changer transitions 1/2632 dead transitions. [2023-08-24 09:05:04,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 2632 transitions, 52318 flow [2023-08-24 09:05:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-24 09:05:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-24 09:05:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 7798 transitions. [2023-08-24 09:05:04,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193284193284193 [2023-08-24 09:05:04,626 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 7798 transitions. [2023-08-24 09:05:04,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 7798 transitions. [2023-08-24 09:05:04,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:05:04,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 7798 transitions. [2023-08-24 09:05:04,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 129.96666666666667) internal successors, (7798), 60 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states 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 09:05:04,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 407.0) internal successors, (24827), 61 states have internal predecessors, (24827), 0 states have call successors, (0), 0 states 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 09:05:04,651 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 407.0) internal successors, (24827), 61 states have internal predecessors, (24827), 0 states have call successors, (0), 0 states 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 09:05:04,651 INFO L175 Difference]: Start difference. First operand has 215 places, 942 transitions, 17039 flow. Second operand 60 states and 7798 transitions. [2023-08-24 09:05:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 2632 transitions, 52318 flow [2023-08-24 09:05:19,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 2632 transitions, 49326 flow, removed 465 selfloop flow, removed 16 redundant places. [2023-08-24 09:05:19,391 INFO L231 Difference]: Finished difference. Result has 269 places, 1853 transitions, 35679 flow [2023-08-24 09:05:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=15732, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=35679, PETRI_PLACES=269, PETRI_TRANSITIONS=1853} [2023-08-24 09:05:19,392 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 237 predicate places. [2023-08-24 09:05:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 1853 transitions, 35679 flow [2023-08-24 09:05:19,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 123.25) internal successors, (3944), 32 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states 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 09:05:19,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:05:19,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:05:19,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-24 09:05:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:05:19,603 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 09:05:19,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:05:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1484897921, now seen corresponding path program 3 times [2023-08-24 09:05:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:05:19,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979314814] [2023-08-24 09:05:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:05:19,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:05:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:05:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:05:22,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:05:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979314814] [2023-08-24 09:05:22,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979314814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:05:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284085326] [2023-08-24 09:05:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:05:22,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:05:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:05:22,027 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 09:05:22,029 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 09:05:22,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:05:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:05:22,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 09:05:22,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:05:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:05:22,607 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 18 treesize of output 20 [2023-08-24 09:05:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:05:22,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:05:23,210 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (v_ArrVal_1079 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1079))) (let ((.cse2 (select .cse1 ~q2~0.base))) (let ((.cse0 (+ (select .cse2 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1))) (or (not (= .cse0 (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (< 0 (select .cse2 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (<= .cse0 0)))))) is different from false [2023-08-24 09:05:23,358 INFO L322 Elim1Store]: treesize reduction 8, result has 91.4 percent of original size [2023-08-24 09:05:23,359 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 213 [2023-08-24 09:05:23,409 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:05:23,409 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 107 treesize of output 111 [2023-08-24 09:05:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-24 09:05:24,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284085326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:05:24,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:05:24,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 29 [2023-08-24 09:05:24,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010163855] [2023-08-24 09:05:24,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:05:24,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:05:24,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:05:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:05:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=738, Unknown=1, NotChecked=54, Total=870 [2023-08-24 09:05:24,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 407 [2023-08-24 09:05:24,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 1853 transitions, 35679 flow. Second operand has 30 states, 30 states have (on average 109.33333333333333) internal successors, (3280), 30 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states 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 09:05:24,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:05:24,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 407 [2023-08-24 09:05:24,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:05:47,287 INFO L124 PetriNetUnfolderBase]: 34794/51524 cut-off events. [2023-08-24 09:05:47,287 INFO L125 PetriNetUnfolderBase]: For 1602254/1602256 co-relation queries the response was YES. [2023-08-24 09:05:47,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528302 conditions, 51524 events. 34794/51524 cut-off events. For 1602254/1602256 co-relation queries the response was YES. Maximal size of possible extension queue 2260. Compared 364788 event pairs, 3207 based on Foata normal form. 736/50761 useless extension candidates. Maximal degree in co-relation 528208. Up to 28388 conditions per place. [2023-08-24 09:05:48,210 INFO L140 encePairwiseOnDemand]: 393/407 looper letters, 2632 selfloop transitions, 867 changer transitions 7/3508 dead transitions. [2023-08-24 09:05:48,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 3508 transitions, 75835 flow [2023-08-24 09:05:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:05:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:05:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3219 transitions. [2023-08-24 09:05:48,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824675324675325 [2023-08-24 09:05:48,214 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3219 transitions. [2023-08-24 09:05:48,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3219 transitions. [2023-08-24 09:05:48,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:05:48,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3219 transitions. [2023-08-24 09:05:48,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 114.96428571428571) internal successors, (3219), 28 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states 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 09:05:48,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 407.0) internal successors, (11803), 29 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states 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 09:05:48,225 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 407.0) internal successors, (11803), 29 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states 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 09:05:48,225 INFO L175 Difference]: Start difference. First operand has 269 places, 1853 transitions, 35679 flow. Second operand 28 states and 3219 transitions. [2023-08-24 09:05:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 3508 transitions, 75835 flow [2023-08-24 09:06:27,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 3508 transitions, 71787 flow, removed 1193 selfloop flow, removed 12 redundant places. [2023-08-24 09:06:27,467 INFO L231 Difference]: Finished difference. Result has 296 places, 2279 transitions, 43639 flow [2023-08-24 09:06:27,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=32620, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=43639, PETRI_PLACES=296, PETRI_TRANSITIONS=2279} [2023-08-24 09:06:27,469 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 264 predicate places. [2023-08-24 09:06:27,469 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 2279 transitions, 43639 flow [2023-08-24 09:06:27,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 109.33333333333333) internal successors, (3280), 30 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states 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 09:06:27,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:06:27,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:06:27,475 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 09:06:27,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:06:27,676 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 09:06:27,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:06:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash 601793135, now seen corresponding path program 4 times [2023-08-24 09:06:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:06:27,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138226769] [2023-08-24 09:06:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:06:27,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:06:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:06:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:06:30,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:06:30,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138226769] [2023-08-24 09:06:30,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138226769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:06:30,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626665115] [2023-08-24 09:06:30,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:06:30,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:06:30,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:06:30,195 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 09:06:30,197 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 09:06:30,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:06:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:06:30,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 09:06:30,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:06:30,440 INFO L322 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2023-08-24 09:06:30,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 38 [2023-08-24 09:06:30,707 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:06:30,707 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 11 treesize of output 11 [2023-08-24 09:06:31,699 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 09:06:31,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 34 [2023-08-24 09:06:31,708 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 7 treesize of output 3 [2023-08-24 09:06:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:06:31,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:06:32,744 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:06:32,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 123 [2023-08-24 09:06:32,754 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 9 treesize of output 3 [2023-08-24 09:06:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:06:34,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626665115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:06:34,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:06:34,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2023-08-24 09:06:34,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043975382] [2023-08-24 09:06:34,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:06:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 09:06:34,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:06:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 09:06:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 09:06:34,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 407 [2023-08-24 09:06:34,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 2279 transitions, 43639 flow. Second operand has 42 states, 42 states have (on average 108.76190476190476) internal successors, (4568), 42 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states 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 09:06:34,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:06:34,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 407 [2023-08-24 09:06:34,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:07:39,444 INFO L124 PetriNetUnfolderBase]: 63464/94612 cut-off events. [2023-08-24 09:07:39,444 INFO L125 PetriNetUnfolderBase]: For 3388495/3388497 co-relation queries the response was YES. [2023-08-24 09:07:40,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984596 conditions, 94612 events. 63464/94612 cut-off events. For 3388495/3388497 co-relation queries the response was YES. Maximal size of possible extension queue 4149. Compared 731184 event pairs, 2709 based on Foata normal form. 1914/95672 useless extension candidates. Maximal degree in co-relation 984490. Up to 28986 conditions per place. [2023-08-24 09:07:41,549 INFO L140 encePairwiseOnDemand]: 393/407 looper letters, 2434 selfloop transitions, 3651 changer transitions 8/6095 dead transitions. [2023-08-24 09:07:41,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 6095 transitions, 131397 flow [2023-08-24 09:07:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-24 09:07:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-24 09:07:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 10310 transitions. [2023-08-24 09:07:41,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2846257902437678 [2023-08-24 09:07:41,559 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 10310 transitions. [2023-08-24 09:07:41,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 10310 transitions. [2023-08-24 09:07:41,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:07:41,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 10310 transitions. [2023-08-24 09:07:41,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 115.84269662921348) internal successors, (10310), 89 states have internal predecessors, (10310), 0 states have call successors, (0), 0 states 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 09:07:41,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 407.0) internal successors, (36630), 90 states have internal predecessors, (36630), 0 states have call successors, (0), 0 states 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 09:07:41,604 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 407.0) internal successors, (36630), 90 states have internal predecessors, (36630), 0 states have call successors, (0), 0 states 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 09:07:41,604 INFO L175 Difference]: Start difference. First operand has 296 places, 2279 transitions, 43639 flow. Second operand 89 states and 10310 transitions. [2023-08-24 09:07:41,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 6095 transitions, 131397 flow [2023-08-24 09:09:39,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 6095 transitions, 131020 flow, removed 173 selfloop flow, removed 9 redundant places. [2023-08-24 09:09:39,737 INFO L231 Difference]: Finished difference. Result has 418 places, 4821 transitions, 112589 flow [2023-08-24 09:09:39,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=43318, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=112589, PETRI_PLACES=418, PETRI_TRANSITIONS=4821} [2023-08-24 09:09:39,740 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 386 predicate places. [2023-08-24 09:09:39,740 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 4821 transitions, 112589 flow [2023-08-24 09:09:39,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 108.76190476190476) internal successors, (4568), 42 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states 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 09:09:39,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:09:39,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:09:39,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 09:09:39,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:09:39,947 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 09:09:39,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:09:39,947 INFO L85 PathProgramCache]: Analyzing trace with hash 516257441, now seen corresponding path program 5 times [2023-08-24 09:09:39,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:09:39,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643649167] [2023-08-24 09:09:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:09:39,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:09:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:09:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:09:41,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:09:41,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643649167] [2023-08-24 09:09:41,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643649167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:09:41,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028793355] [2023-08-24 09:09:41,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:09:41,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:09:41,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:09:41,615 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 09:09:41,616 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 09:09:41,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:09:41,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:09:41,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 09:09:41,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:09:42,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:09:42,230 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 09:09:42,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 38 [2023-08-24 09:09:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:09:42,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:09:42,731 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:09:42,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 123 [2023-08-24 09:09:42,743 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 13 treesize of output 7 [2023-08-24 09:09:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:09:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028793355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:09:43,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:09:43,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2023-08-24 09:09:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154494530] [2023-08-24 09:09:43,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:09:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 09:09:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:09:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 09:09:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=683, Unknown=4, NotChecked=0, Total=756 [2023-08-24 09:09:43,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 407 [2023-08-24 09:09:43,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 4821 transitions, 112589 flow. Second operand has 28 states, 28 states have (on average 116.21428571428571) internal successors, (3254), 28 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states 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 09:09:43,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:09:43,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 407 [2023-08-24 09:09:43,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 09:10:56,892 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:10:56,892 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 09:10:57,913 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 09:10:58,093 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-24 09:10:58,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2023-08-24 09:10:58,902 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 09:10:58,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-24 09:10:58,902 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-24 09:10:58,903 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 09:10:58,904 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 09:10:58,904 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 09:10:58,904 INFO L445 BasicCegarLoop]: Path program histogram: [8, 5, 5, 1, 1, 1, 1, 1] [2023-08-24 09:10:58,907 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 09:10:58,907 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 09:10:58,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 09:10:58 BasicIcfg [2023-08-24 09:10:58,909 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 09:10:58,909 INFO L158 Benchmark]: Toolchain (without parser) took 785583.35ms. Allocated memory was 356.5MB in the beginning and 13.8GB in the end (delta: 13.4GB). Free memory was 331.9MB in the beginning and 10.8GB in the end (delta: -10.5GB). Peak memory consumption was 10.4GB. Max. memory is 16.0GB. [2023-08-24 09:10:58,909 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 356.5MB. Free memory is still 332.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:10:58,909 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.71ms. Allocated memory is still 356.5MB. Free memory was 331.7MB in the beginning and 319.6MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 09:10:58,909 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.63ms. Allocated memory is still 356.5MB. Free memory was 319.6MB in the beginning and 317.3MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-24 09:10:58,910 INFO L158 Benchmark]: Boogie Preprocessor took 50.92ms. Allocated memory is still 356.5MB. Free memory was 317.1MB in the beginning and 315.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:10:58,910 INFO L158 Benchmark]: RCFGBuilder took 693.81ms. Allocated memory was 356.5MB in the beginning and 453.0MB in the end (delta: 96.5MB). Free memory was 315.2MB in the beginning and 419.5MB in the end (delta: -104.2MB). Peak memory consumption was 31.2MB. Max. memory is 16.0GB. [2023-08-24 09:10:58,910 INFO L158 Benchmark]: TraceAbstraction took 784472.16ms. Allocated memory was 453.0MB in the beginning and 13.8GB in the end (delta: 13.3GB). Free memory was 418.8MB in the beginning and 10.8GB in the end (delta: -10.4GB). Peak memory consumption was 10.3GB. Max. memory is 16.0GB. [2023-08-24 09:10:58,911 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 356.5MB. Free memory is still 332.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 293.71ms. Allocated memory is still 356.5MB. Free memory was 331.7MB in the beginning and 319.6MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 58.63ms. Allocated memory is still 356.5MB. Free memory was 319.6MB in the beginning and 317.3MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 50.92ms. Allocated memory is still 356.5MB. Free memory was 317.1MB in the beginning and 315.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 693.81ms. Allocated memory was 356.5MB in the beginning and 453.0MB in the end (delta: 96.5MB). Free memory was 315.2MB in the beginning and 419.5MB in the end (delta: -104.2MB). Peak memory consumption was 31.2MB. Max. memory is 16.0GB. * TraceAbstraction took 784472.16ms. Allocated memory was 453.0MB in the beginning and 13.8GB in the end (delta: 13.3GB). Free memory was 418.8MB in the beginning and 10.8GB in the end (delta: -10.4GB). Peak memory consumption was 10.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.5s, 183 PlacesBefore, 32 PlacesAfterwards, 191 TransitionsBefore, 28 TransitionsAfterwards, 1528 CoEnabledTransitionPairs, 8 FixpointIterations, 126 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 10 ConcurrentYvCompositions, 12 ChoiceCompositions, 203 TotalNumberOfCompositions, 2401 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1761, independent: 1694, independent conditional: 0, independent unconditional: 1694, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 877, independent: 858, independent conditional: 0, independent unconditional: 858, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1761, independent: 836, independent conditional: 0, independent unconditional: 836, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 877, unknown conditional: 0, unknown unconditional: 877] , Statistics on independence cache: Total cache size (in pairs): 61, Positive cache size: 55, Positive conditional cache size: 0, Positive unconditional cache size: 55, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 218 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: 784.3s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 514.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.7s, HoareTripleCheckerStatistics: 284 mSolverCounterUnknown, 3853 SdHoareTripleChecker+Valid, 68.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3853 mSDsluCounter, 608 SdHoareTripleChecker+Invalid, 65.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1947 IncrementalHoareTripleChecker+Unchecked, 564 mSDsCounter, 1231 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20798 IncrementalHoareTripleChecker+Invalid, 24260 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1231 mSolverCounterUnsat, 44 mSDtfsCounter, 20798 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1331 GetRequests, 595 SyntacticMatches, 13 SemanticMatches, 723 ConstructedPredicates, 8 IntricatePredicates, 1 DeprecatedPredicates, 8369 ImplicationChecksByTransitivity, 79.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112589occurred in iteration=22, InterpolantAutomatonStates: 452, 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: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 255.3s InterpolantComputationTime, 1086 NumberOfCodeBlocks, 1075 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 1377 ConstructedInterpolants, 117 QuantifiedInterpolants, 27537 SizeOfPredicates, 276 NumberOfNonLiveVariables, 6014 ConjunctsInSsa, 719 ConjunctsInUnsatCore, 55 InterpolantComputations, 10 PerfectInterpolantSequences, 104/275 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