/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 PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 15:47:07,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 15:47:07,080 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 15:47:07,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 15:47:07,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 15:47:07,121 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 15:47:07,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 15:47:07,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 15:47:07,123 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 15:47:07,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 15:47:07,127 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 15:47:07,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 15:47:07,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 15:47:07,128 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 15:47:07,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 15:47:07,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 15:47:07,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 15:47:07,129 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 15:47:07,129 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 15:47:07,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 15:47:07,130 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 15:47:07,130 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 15:47:07,130 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 15:47:07,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 15:47:07,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 15:47:07,131 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 15:47:07,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 15:47:07,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:47:07,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 15:47:07,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 15:47:07,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 15:47:07,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 15:47:07,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 15:47:07,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 15:47:07,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 15:47:07,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 15:47:07,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 15:47:07,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 15:47:07,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 15:47:07,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 15:47:07,491 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 15:47:07,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-24 15:47:08,752 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 15:47:08,978 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 15:47:08,979 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-24 15:47:08,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4ed70e8/daef8567ffc3470b992f11966120f635/FLAG9b162ba7a [2023-08-24 15:47:08,996 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4ed70e8/daef8567ffc3470b992f11966120f635 [2023-08-24 15:47:08,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 15:47:08,999 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 15:47:09,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 15:47:09,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 15:47:09,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 15:47:09,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:47:08" (1/1) ... [2023-08-24 15:47:09,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b51a458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09, skipping insertion in model container [2023-08-24 15:47:09,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:47:08" (1/1) ... [2023-08-24 15:47:09,024 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 15:47:09,179 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2023-08-24 15:47:09,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:47:09,195 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 15:47:09,212 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2023-08-24 15:47:09,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:47:09,222 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:47:09,222 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:47:09,228 INFO L206 MainTranslator]: Completed translation [2023-08-24 15:47:09,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09 WrapperNode [2023-08-24 15:47:09,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 15:47:09,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 15:47:09,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 15:47:09,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 15:47:09,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,268 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 187 [2023-08-24 15:47:09,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 15:47:09,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 15:47:09,276 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 15:47:09,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 15:47:09,283 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,302 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 15:47:09,303 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 15:47:09,303 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 15:47:09,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 15:47:09,304 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (1/1) ... [2023-08-24 15:47:09,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:47:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:09,344 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 15:47:09,346 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 15:47:09,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 15:47:09,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 15:47:09,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 15:47:09,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 15:47:09,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 15:47:09,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 15:47:09,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 15:47:09,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 15:47:09,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 15:47:09,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 15:47:09,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 15:47:09,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 15:47:09,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 15:47:09,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 15:47:09,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 15:47:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 15:47:09,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 15:47:09,377 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 15:47:09,467 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 15:47:09,469 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 15:47:09,769 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 15:47:09,871 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 15:47:09,871 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 15:47:09,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:47:09 BoogieIcfgContainer [2023-08-24 15:47:09,873 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 15:47:09,875 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 15:47:09,875 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 15:47:09,878 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 15:47:09,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:47:08" (1/3) ... [2023-08-24 15:47:09,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55934d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:47:09, skipping insertion in model container [2023-08-24 15:47:09,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:47:09" (2/3) ... [2023-08-24 15:47:09,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55934d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:47:09, skipping insertion in model container [2023-08-24 15:47:09,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:47:09" (3/3) ... [2023-08-24 15:47:09,881 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-08-24 15:47:09,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 15:47:09,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 15:47:09,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 15:47:09,968 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 15:47:10,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 152 transitions, 328 flow [2023-08-24 15:47:10,098 INFO L124 PetriNetUnfolderBase]: 9/149 cut-off events. [2023-08-24 15:47:10,099 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:47:10,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 149 events. 9/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-24 15:47:10,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 152 transitions, 328 flow [2023-08-24 15:47:10,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 139 transitions, 296 flow [2023-08-24 15:47:10,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 15:47:10,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 139 transitions, 296 flow [2023-08-24 15:47:10,145 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 139 transitions, 296 flow [2023-08-24 15:47:10,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 139 transitions, 296 flow [2023-08-24 15:47:10,204 INFO L124 PetriNetUnfolderBase]: 9/139 cut-off events. [2023-08-24 15:47:10,204 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:47:10,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 9/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-24 15:47:10,209 INFO L119 LiptonReduction]: Number of co-enabled transitions 1600 [2023-08-24 15:47:14,962 INFO L134 LiptonReduction]: Checked pairs total: 1697 [2023-08-24 15:47:14,962 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-24 15:47:14,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 15:47:14,980 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;@3814589b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 15:47:14,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 15:47:14,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 15:47:14,986 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-08-24 15:47:14,986 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:47:14,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:14,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:47:14,988 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 15:47:14,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash -575482243, now seen corresponding path program 1 times [2023-08-24 15:47:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:14,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588560709] [2023-08-24 15:47:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:14,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:15,434 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 15:47:15,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588560709] [2023-08-24 15:47:15,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588560709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:15,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:47:15,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 15:47:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738901336] [2023-08-24 15:47:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 15:47:15,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 15:47:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 15:47:15,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 284 [2023-08-24 15:47:15,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 15:47:15,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:15,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 284 [2023-08-24 15:47:15,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:15,652 INFO L124 PetriNetUnfolderBase]: 169/271 cut-off events. [2023-08-24 15:47:15,653 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 15:47:15,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 271 events. 169/271 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 667 event pairs, 108 based on Foata normal form. 8/235 useless extension candidates. Maximal degree in co-relation 372. Up to 217 conditions per place. [2023-08-24 15:47:15,657 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 21 selfloop transitions, 2 changer transitions 11/34 dead transitions. [2023-08-24 15:47:15,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 163 flow [2023-08-24 15:47:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 15:47:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 15:47:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-08-24 15:47:15,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586267605633803 [2023-08-24 15:47:15,672 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-08-24 15:47:15,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-08-24 15:47:15,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:15,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-08-24 15:47:15,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 15:47:15,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states 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 15:47:15,686 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states 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 15:47:15,688 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 4 states and 521 transitions. [2023-08-24 15:47:15,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 163 flow [2023-08-24 15:47:15,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 15:47:15,692 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 68 flow [2023-08-24 15:47:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-24 15:47:15,696 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-24 15:47:15,696 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 68 flow [2023-08-24 15:47:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 15:47:15,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:15,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:47:15,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 15:47:15,698 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 15:47:15,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1768297043, now seen corresponding path program 1 times [2023-08-24 15:47:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411298608] [2023-08-24 15:47:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411298608] [2023-08-24 15:47:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411298608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937549571] [2023-08-24 15:47:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:15,917 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 15:47:15,941 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 15:47:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:16,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:47:16,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:16,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:47:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:16,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937549571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:47:16,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:47:16,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-24 15:47:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439383268] [2023-08-24 15:47:16,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:47:16,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:47:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:47:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:47:16,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 284 [2023-08-24 15:47:16,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 68 flow. Second operand has 11 states, 11 states have (on average 122.36363636363636) internal successors, (1346), 11 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states 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 15:47:16,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:16,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 284 [2023-08-24 15:47:16,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:16,438 INFO L124 PetriNetUnfolderBase]: 203/328 cut-off events. [2023-08-24 15:47:16,438 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-24 15:47:16,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 328 events. 203/328 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 918 event pairs, 108 based on Foata normal form. 30/356 useless extension candidates. Maximal degree in co-relation 767. Up to 217 conditions per place. [2023-08-24 15:47:16,441 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 21 selfloop transitions, 3 changer transitions 24/48 dead transitions. [2023-08-24 15:47:16,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 228 flow [2023-08-24 15:47:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:47:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:47:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 766 transitions. [2023-08-24 15:47:16,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495305164319249 [2023-08-24 15:47:16,445 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 766 transitions. [2023-08-24 15:47:16,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 766 transitions. [2023-08-24 15:47:16,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:16,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 766 transitions. [2023-08-24 15:47:16,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.66666666666667) internal successors, (766), 6 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 15:47:16,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states 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 15:47:16,452 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states 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 15:47:16,452 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 68 flow. Second operand 6 states and 766 transitions. [2023-08-24 15:47:16,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 228 flow [2023-08-24 15:47:16,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 15:47:16,454 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 92 flow [2023-08-24 15:47:16,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-24 15:47:16,455 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-24 15:47:16,455 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 92 flow [2023-08-24 15:47:16,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 122.36363636363636) internal successors, (1346), 11 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states 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 15:47:16,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:16,456 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] [2023-08-24 15:47:16,468 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 15:47:16,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:16,669 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 15:47:16,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash 153755981, now seen corresponding path program 2 times [2023-08-24 15:47:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:16,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094398009] [2023-08-24 15:47:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:19,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094398009] [2023-08-24 15:47:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094398009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183685790] [2023-08-24 15:47:19,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:47:19,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:19,457 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 15:47:19,460 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 15:47:19,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 15:47:19,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:19,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 15:47:19,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:19,788 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 21 treesize of output 23 [2023-08-24 15:47:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:19,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:47:19,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183685790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:19,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:47:19,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 15:47:19,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199549711] [2023-08-24 15:47:19,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:19,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:47:19,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:47:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:47:19,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:47:19,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 92 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:47:19,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:19,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:47:19,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:20,340 INFO L124 PetriNetUnfolderBase]: 169/288 cut-off events. [2023-08-24 15:47:20,340 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-24 15:47:20,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 288 events. 169/288 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 858 event pairs, 32 based on Foata normal form. 25/312 useless extension candidates. Maximal degree in co-relation 847. Up to 137 conditions per place. [2023-08-24 15:47:20,343 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 50 selfloop transitions, 13 changer transitions 13/76 dead transitions. [2023-08-24 15:47:20,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 405 flow [2023-08-24 15:47:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:47:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:47:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 919 transitions. [2023-08-24 15:47:20,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044894366197183 [2023-08-24 15:47:20,346 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 919 transitions. [2023-08-24 15:47:20,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 919 transitions. [2023-08-24 15:47:20,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:20,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 919 transitions. [2023-08-24 15:47:20,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 15:47:20,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:20,354 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:20,354 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 92 flow. Second operand 8 states and 919 transitions. [2023-08-24 15:47:20,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 405 flow [2023-08-24 15:47:20,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 76 transitions, 357 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-24 15:47:20,357 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 181 flow [2023-08-24 15:47:20,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=181, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-24 15:47:20,358 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-08-24 15:47:20,358 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 181 flow [2023-08-24 15:47:20,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:47:20,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:20,359 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] [2023-08-24 15:47:20,368 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 15:47:20,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 15:47:20,566 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 15:47:20,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -784383183, now seen corresponding path program 3 times [2023-08-24 15:47:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:20,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050777340] [2023-08-24 15:47:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050777340] [2023-08-24 15:47:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050777340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654846404] [2023-08-24 15:47:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:47:22,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:22,228 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 15:47:22,251 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 15:47:22,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 15:47:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:22,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:47:22,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:22,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:47:22,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654846404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:22,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:47:22,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-24 15:47:22,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550501200] [2023-08-24 15:47:22,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:22,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:47:22,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:47:22,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:47:22,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 15:47:22,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 181 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:22,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:22,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 15:47:22,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:22,838 INFO L124 PetriNetUnfolderBase]: 245/402 cut-off events. [2023-08-24 15:47:22,838 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-08-24 15:47:22,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 402 events. 245/402 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1285 event pairs, 53 based on Foata normal form. 5/406 useless extension candidates. Maximal degree in co-relation 1480. Up to 215 conditions per place. [2023-08-24 15:47:22,842 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 52 selfloop transitions, 21 changer transitions 13/86 dead transitions. [2023-08-24 15:47:22,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 86 transitions, 560 flow [2023-08-24 15:47:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:47:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:47:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 970 transitions. [2023-08-24 15:47:22,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269366197183099 [2023-08-24 15:47:22,853 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 970 transitions. [2023-08-24 15:47:22,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 970 transitions. [2023-08-24 15:47:22,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:22,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 970 transitions. [2023-08-24 15:47:22,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.25) internal successors, (970), 8 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 15:47:22,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:22,860 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:22,860 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 181 flow. Second operand 8 states and 970 transitions. [2023-08-24 15:47:22,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 86 transitions, 560 flow [2023-08-24 15:47:22,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 524 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-24 15:47:22,867 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 341 flow [2023-08-24 15:47:22,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-24 15:47:22,868 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-24 15:47:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 341 flow [2023-08-24 15:47:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:22,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:22,869 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] [2023-08-24 15:47:22,880 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 15:47:23,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:23,078 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 15:47:23,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash 602180493, now seen corresponding path program 4 times [2023-08-24 15:47:23,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:23,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457899463] [2023-08-24 15:47:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:23,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:24,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:24,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457899463] [2023-08-24 15:47:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457899463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:24,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962611759] [2023-08-24 15:47:24,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:47:24,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:24,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:24,507 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 15:47:24,524 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 15:47:24,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:47:24,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:24,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 15:47:24,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:24,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:24,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 15:47:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:24,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:47:24,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962611759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:24,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:47:24,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 15:47:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929158190] [2023-08-24 15:47:24,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:47:24,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:24,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:47:24,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:47:24,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:47:24,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 341 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:47:24,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:24,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:47:24,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:25,286 INFO L124 PetriNetUnfolderBase]: 244/408 cut-off events. [2023-08-24 15:47:25,286 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2023-08-24 15:47:25,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 408 events. 244/408 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1367 event pairs, 40 based on Foata normal form. 1/408 useless extension candidates. Maximal degree in co-relation 1782. Up to 187 conditions per place. [2023-08-24 15:47:25,290 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 58 selfloop transitions, 20 changer transitions 15/93 dead transitions. [2023-08-24 15:47:25,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 693 flow [2023-08-24 15:47:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:47:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:47:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 915 transitions. [2023-08-24 15:47:25,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027288732394366 [2023-08-24 15:47:25,294 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 915 transitions. [2023-08-24 15:47:25,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 915 transitions. [2023-08-24 15:47:25,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:25,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 915 transitions. [2023-08-24 15:47:25,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.375) internal successors, (915), 8 states have internal predecessors, (915), 0 states have call successors, (0), 0 states 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 15:47:25,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:25,302 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:25,302 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 341 flow. Second operand 8 states and 915 transitions. [2023-08-24 15:47:25,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 693 flow [2023-08-24 15:47:25,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 665 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-24 15:47:25,309 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 354 flow [2023-08-24 15:47:25,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=354, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-08-24 15:47:25,311 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-08-24 15:47:25,312 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 354 flow [2023-08-24 15:47:25,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:47:25,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:25,312 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] [2023-08-24 15:47:25,321 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 15:47:25,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:25,521 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 15:47:25,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1538024075, now seen corresponding path program 5 times [2023-08-24 15:47:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:25,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984955208] [2023-08-24 15:47:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:25,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:27,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:27,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984955208] [2023-08-24 15:47:27,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984955208] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:27,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781457803] [2023-08-24 15:47:27,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:47:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:27,857 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 15:47:27,869 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 15:47:27,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:47:27,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:27,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 15:47:27,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:28,158 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 15:47:28,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:47:28,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:47:28,314 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 58 treesize of output 60 [2023-08-24 15:47:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781457803] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:28,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:47:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 23 [2023-08-24 15:47:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999300108] [2023-08-24 15:47:28,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:28,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:47:28,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:28,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:47:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:47:28,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 15:47:28,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 354 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 15:47:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:29,124 INFO L124 PetriNetUnfolderBase]: 265/438 cut-off events. [2023-08-24 15:47:29,124 INFO L125 PetriNetUnfolderBase]: For 1863/1863 co-relation queries the response was YES. [2023-08-24 15:47:29,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 438 events. 265/438 cut-off events. For 1863/1863 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1481 event pairs, 46 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2017. Up to 217 conditions per place. [2023-08-24 15:47:29,128 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 57 selfloop transitions, 25 changer transitions 13/95 dead transitions. [2023-08-24 15:47:29,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 757 flow [2023-08-24 15:47:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:47:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:47:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 972 transitions. [2023-08-24 15:47:29,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278169014084507 [2023-08-24 15:47:29,132 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 972 transitions. [2023-08-24 15:47:29,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 972 transitions. [2023-08-24 15:47:29,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:29,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 972 transitions. [2023-08-24 15:47:29,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.5) internal successors, (972), 8 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 15:47:29,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:29,138 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:29,138 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 354 flow. Second operand 8 states and 972 transitions. [2023-08-24 15:47:29,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 757 flow [2023-08-24 15:47:29,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 95 transitions, 687 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-24 15:47:29,145 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 461 flow [2023-08-24 15:47:29,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=461, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2023-08-24 15:47:29,147 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2023-08-24 15:47:29,147 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 461 flow [2023-08-24 15:47:29,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:29,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:29,151 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] [2023-08-24 15:47:29,159 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 15:47:29,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:29,357 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 15:47:29,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1455676435, now seen corresponding path program 6 times [2023-08-24 15:47:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:29,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065677214] [2023-08-24 15:47:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:29,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:30,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065677214] [2023-08-24 15:47:30,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065677214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:30,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373869302] [2023-08-24 15:47:30,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:47:30,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:30,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:30,893 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 15:47:30,917 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 15:47:31,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 15:47:31,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:31,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 15:47:31,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:31,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:47:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373869302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:31,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:47:31,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-24 15:47:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662085826] [2023-08-24 15:47:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:47:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:47:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:47:31,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 15:47:31,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:31,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:31,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 15:47:31,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:31,522 INFO L124 PetriNetUnfolderBase]: 288/488 cut-off events. [2023-08-24 15:47:31,522 INFO L125 PetriNetUnfolderBase]: For 2078/2078 co-relation queries the response was YES. [2023-08-24 15:47:31,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 488 events. 288/488 cut-off events. For 2078/2078 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1785 event pairs, 45 based on Foata normal form. 1/488 useless extension candidates. Maximal degree in co-relation 2321. Up to 264 conditions per place. [2023-08-24 15:47:31,526 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 61 selfloop transitions, 29 changer transitions 13/103 dead transitions. [2023-08-24 15:47:31,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 873 flow [2023-08-24 15:47:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:47:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:47:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 973 transitions. [2023-08-24 15:47:31,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282570422535211 [2023-08-24 15:47:31,529 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 973 transitions. [2023-08-24 15:47:31,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 973 transitions. [2023-08-24 15:47:31,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:31,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 973 transitions. [2023-08-24 15:47:31,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.625) internal successors, (973), 8 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 15:47:31,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:31,536 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:31,536 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 461 flow. Second operand 8 states and 973 transitions. [2023-08-24 15:47:31,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 873 flow [2023-08-24 15:47:31,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 103 transitions, 830 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 15:47:31,544 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 570 flow [2023-08-24 15:47:31,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=570, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2023-08-24 15:47:31,545 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-08-24 15:47:31,545 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 570 flow [2023-08-24 15:47:31,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:31,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:31,546 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] [2023-08-24 15:47:31,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 15:47:31,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:31,753 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 15:47:31,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash -342574381, now seen corresponding path program 7 times [2023-08-24 15:47:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:31,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657045676] [2023-08-24 15:47:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:32,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657045676] [2023-08-24 15:47:32,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657045676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304074859] [2023-08-24 15:47:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:47:32,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:32,628 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 15:47:32,687 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 15:47:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:32,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 15:47:32,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:33,106 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 33 treesize of output 33 [2023-08-24 15:47:33,243 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 15:47:33,244 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 85 treesize of output 41 [2023-08-24 15:47:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:33,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:47:33,617 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:47:33,617 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 86 treesize of output 89 [2023-08-24 15:47:33,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:47:33,838 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 20 treesize of output 7 [2023-08-24 15:47:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304074859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:47:34,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:47:34,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-24 15:47:34,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270026224] [2023-08-24 15:47:34,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:47:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 15:47:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 15:47:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2023-08-24 15:47:34,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 284 [2023-08-24 15:47:34,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 570 flow. Second operand has 32 states, 32 states have (on average 93.96875) internal successors, (3007), 32 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states 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 15:47:34,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:34,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 284 [2023-08-24 15:47:34,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:37,115 INFO L124 PetriNetUnfolderBase]: 797/1397 cut-off events. [2023-08-24 15:47:37,116 INFO L125 PetriNetUnfolderBase]: For 8556/8556 co-relation queries the response was YES. [2023-08-24 15:47:37,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7069 conditions, 1397 events. 797/1397 cut-off events. For 8556/8556 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7065 event pairs, 162 based on Foata normal form. 1/1396 useless extension candidates. Maximal degree in co-relation 7018. Up to 475 conditions per place. [2023-08-24 15:47:37,127 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 199 selfloop transitions, 75 changer transitions 13/287 dead transitions. [2023-08-24 15:47:37,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 287 transitions, 2622 flow [2023-08-24 15:47:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:47:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:47:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2134 transitions. [2023-08-24 15:47:37,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357813547954393 [2023-08-24 15:47:37,134 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2134 transitions. [2023-08-24 15:47:37,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2134 transitions. [2023-08-24 15:47:37,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:37,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2134 transitions. [2023-08-24 15:47:37,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.61904761904762) internal successors, (2134), 21 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states 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 15:47:37,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states 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 15:47:37,149 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states 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 15:47:37,149 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 570 flow. Second operand 21 states and 2134 transitions. [2023-08-24 15:47:37,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 287 transitions, 2622 flow [2023-08-24 15:47:37,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 287 transitions, 2485 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-24 15:47:37,164 INFO L231 Difference]: Finished difference. Result has 90 places, 145 transitions, 1615 flow [2023-08-24 15:47:37,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1615, PETRI_PLACES=90, PETRI_TRANSITIONS=145} [2023-08-24 15:47:37,166 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-08-24 15:47:37,167 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 145 transitions, 1615 flow [2023-08-24 15:47:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 93.96875) internal successors, (3007), 32 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states 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 15:47:37,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:37,168 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] [2023-08-24 15:47:37,177 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 15:47:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:37,374 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 15:47:37,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1214010809, now seen corresponding path program 8 times [2023-08-24 15:47:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:37,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051523316] [2023-08-24 15:47:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:37,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:37,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:37,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051523316] [2023-08-24 15:47:37,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051523316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:37,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:47:37,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 15:47:37,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344430249] [2023-08-24 15:47:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:37,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 15:47:37,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 15:47:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 15:47:37,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 284 [2023-08-24 15:47:37,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 145 transitions, 1615 flow. Second operand has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 15:47:37,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:37,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 284 [2023-08-24 15:47:37,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:37,633 INFO L124 PetriNetUnfolderBase]: 622/1101 cut-off events. [2023-08-24 15:47:37,633 INFO L125 PetriNetUnfolderBase]: For 11785/11785 co-relation queries the response was YES. [2023-08-24 15:47:37,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6245 conditions, 1101 events. 622/1101 cut-off events. For 11785/11785 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5284 event pairs, 130 based on Foata normal form. 74/1174 useless extension candidates. Maximal degree in co-relation 6196. Up to 568 conditions per place. [2023-08-24 15:47:37,643 INFO L140 encePairwiseOnDemand]: 280/284 looper letters, 95 selfloop transitions, 45 changer transitions 1/141 dead transitions. [2023-08-24 15:47:37,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 141 transitions, 1739 flow [2023-08-24 15:47:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 15:47:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 15:47:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-08-24 15:47:37,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920774647887324 [2023-08-24 15:47:37,646 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-08-24 15:47:37,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-08-24 15:47:37,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:37,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-08-24 15:47:37,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 15:47:37,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states 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 15:47:37,649 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states 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 15:47:37,649 INFO L175 Difference]: Start difference. First operand has 90 places, 145 transitions, 1615 flow. Second operand 4 states and 559 transitions. [2023-08-24 15:47:37,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 141 transitions, 1739 flow [2023-08-24 15:47:37,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 1583 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-24 15:47:37,682 INFO L231 Difference]: Finished difference. Result has 85 places, 128 transitions, 1362 flow [2023-08-24 15:47:37,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1362, PETRI_PLACES=85, PETRI_TRANSITIONS=128} [2023-08-24 15:47:37,683 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-08-24 15:47:37,683 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 128 transitions, 1362 flow [2023-08-24 15:47:37,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 15:47:37,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:37,683 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] [2023-08-24 15:47:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 15:47:37,684 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 15:47:37,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1634147313, now seen corresponding path program 9 times [2023-08-24 15:47:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:37,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415175926] [2023-08-24 15:47:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:38,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415175926] [2023-08-24 15:47:38,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415175926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:38,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878730765] [2023-08-24 15:47:38,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:47:38,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:38,805 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 15:47:38,828 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 15:47:38,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 15:47:38,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:38,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 15:47:38,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:39,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:39,075 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 20 treesize of output 22 [2023-08-24 15:47:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:39,119 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 20 treesize of output 22 [2023-08-24 15:47:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:39,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:47:39,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878730765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:39,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:47:39,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 19 [2023-08-24 15:47:39,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146197896] [2023-08-24 15:47:39,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:39,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:47:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:47:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:47:39,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 284 [2023-08-24 15:47:39,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 128 transitions, 1362 flow. Second operand has 11 states, 11 states have (on average 103.81818181818181) internal successors, (1142), 11 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:47:39,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:39,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 284 [2023-08-24 15:47:39,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:39,683 INFO L124 PetriNetUnfolderBase]: 655/1175 cut-off events. [2023-08-24 15:47:39,683 INFO L125 PetriNetUnfolderBase]: For 7928/7928 co-relation queries the response was YES. [2023-08-24 15:47:39,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6623 conditions, 1175 events. 655/1175 cut-off events. For 7928/7928 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5912 event pairs, 95 based on Foata normal form. 2/1176 useless extension candidates. Maximal degree in co-relation 5330. Up to 594 conditions per place. [2023-08-24 15:47:39,693 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 111 selfloop transitions, 48 changer transitions 14/173 dead transitions. [2023-08-24 15:47:39,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 173 transitions, 2001 flow [2023-08-24 15:47:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:47:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:47:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 891 transitions. [2023-08-24 15:47:39,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921654929577465 [2023-08-24 15:47:39,697 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 891 transitions. [2023-08-24 15:47:39,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 891 transitions. [2023-08-24 15:47:39,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:39,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 891 transitions. [2023-08-24 15:47:39,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.375) internal successors, (891), 8 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 15:47:39,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:39,702 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:39,702 INFO L175 Difference]: Start difference. First operand has 85 places, 128 transitions, 1362 flow. Second operand 8 states and 891 transitions. [2023-08-24 15:47:39,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 173 transitions, 2001 flow [2023-08-24 15:47:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 173 transitions, 1953 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 15:47:39,732 INFO L231 Difference]: Finished difference. Result has 93 places, 133 transitions, 1513 flow [2023-08-24 15:47:39,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=93, PETRI_TRANSITIONS=133} [2023-08-24 15:47:39,734 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-08-24 15:47:39,734 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 133 transitions, 1513 flow [2023-08-24 15:47:39,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 103.81818181818181) internal successors, (1142), 11 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:47:39,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:39,735 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] [2023-08-24 15:47:39,743 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 15:47:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 15:47:39,942 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 15:47:39,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash -403024087, now seen corresponding path program 10 times [2023-08-24 15:47:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:39,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057439265] [2023-08-24 15:47:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057439265] [2023-08-24 15:47:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057439265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118370030] [2023-08-24 15:47:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:47:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:41,257 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 15:47:41,259 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 15:47:41,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:47:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:41,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 15:47:41,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:41,665 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 15:47:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:41,847 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 31 treesize of output 31 [2023-08-24 15:47:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:41,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:47:42,035 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_480) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2023-08-24 15:47:42,289 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:47:42,289 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 292 treesize of output 277 [2023-08-24 15:47:42,297 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:47:42,297 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 50 treesize of output 24 [2023-08-24 15:47:42,323 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:47:42,324 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 72 treesize of output 70 [2023-08-24 15:47:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118370030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:47:42,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:47:42,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-24 15:47:42,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140315056] [2023-08-24 15:47:42,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:47:42,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 15:47:42,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 15:47:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=984, Unknown=2, NotChecked=64, Total=1190 [2023-08-24 15:47:42,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 284 [2023-08-24 15:47:42,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 133 transitions, 1513 flow. Second operand has 35 states, 35 states have (on average 87.8) internal successors, (3073), 35 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 15:47:42,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:42,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 284 [2023-08-24 15:47:42,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:46,763 INFO L124 PetriNetUnfolderBase]: 890/1547 cut-off events. [2023-08-24 15:47:46,764 INFO L125 PetriNetUnfolderBase]: For 12804/12804 co-relation queries the response was YES. [2023-08-24 15:47:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9432 conditions, 1547 events. 890/1547 cut-off events. For 12804/12804 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8053 event pairs, 140 based on Foata normal form. 2/1545 useless extension candidates. Maximal degree in co-relation 9383. Up to 534 conditions per place. [2023-08-24 15:47:46,778 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 216 selfloop transitions, 95 changer transitions 30/341 dead transitions. [2023-08-24 15:47:46,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 341 transitions, 3747 flow [2023-08-24 15:47:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 15:47:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 15:47:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2972 transitions. [2023-08-24 15:47:46,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32702464788732394 [2023-08-24 15:47:46,787 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2972 transitions. [2023-08-24 15:47:46,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2972 transitions. [2023-08-24 15:47:46,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:46,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2972 transitions. [2023-08-24 15:47:46,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 92.875) internal successors, (2972), 32 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states 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 15:47:46,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 284.0) internal successors, (9372), 33 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states 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 15:47:46,805 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 284.0) internal successors, (9372), 33 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states 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 15:47:46,806 INFO L175 Difference]: Start difference. First operand has 93 places, 133 transitions, 1513 flow. Second operand 32 states and 2972 transitions. [2023-08-24 15:47:46,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 341 transitions, 3747 flow [2023-08-24 15:47:46,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 341 transitions, 3620 flow, removed 33 selfloop flow, removed 3 redundant places. [2023-08-24 15:47:46,846 INFO L231 Difference]: Finished difference. Result has 134 places, 182 transitions, 2423 flow [2023-08-24 15:47:46,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2423, PETRI_PLACES=134, PETRI_TRANSITIONS=182} [2023-08-24 15:47:46,847 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2023-08-24 15:47:46,847 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 182 transitions, 2423 flow [2023-08-24 15:47:46,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.8) internal successors, (3073), 35 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states 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 15:47:46,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:46,849 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] [2023-08-24 15:47:46,855 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 15:47:47,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:47,055 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 15:47:47,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash -979702535, now seen corresponding path program 11 times [2023-08-24 15:47:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:47,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626528563] [2023-08-24 15:47:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:48,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:48,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626528563] [2023-08-24 15:47:48,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626528563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:48,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707390625] [2023-08-24 15:47:48,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:47:48,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:48,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:48,501 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:47:48,503 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 15:47:48,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:47:48,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:48,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 15:47:48,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:48,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:47:49,118 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:47:49,119 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 56 treesize of output 58 [2023-08-24 15:47:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707390625] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:47:49,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:47:49,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-08-24 15:47:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717811011] [2023-08-24 15:47:49,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:47:49,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:47:49,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:49,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:47:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-08-24 15:47:49,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 284 [2023-08-24 15:47:49,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 182 transitions, 2423 flow. Second operand has 31 states, 31 states have (on average 88.03225806451613) internal successors, (2729), 31 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states 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 15:47:49,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:49,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 284 [2023-08-24 15:47:49,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:52,371 INFO L124 PetriNetUnfolderBase]: 1002/1817 cut-off events. [2023-08-24 15:47:52,371 INFO L125 PetriNetUnfolderBase]: For 18242/18242 co-relation queries the response was YES. [2023-08-24 15:47:52,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11891 conditions, 1817 events. 1002/1817 cut-off events. For 18242/18242 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10249 event pairs, 139 based on Foata normal form. 2/1817 useless extension candidates. Maximal degree in co-relation 11835. Up to 379 conditions per place. [2023-08-24 15:47:52,385 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 182 selfloop transitions, 140 changer transitions 26/348 dead transitions. [2023-08-24 15:47:52,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 348 transitions, 4419 flow [2023-08-24 15:47:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 15:47:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 15:47:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2258 transitions. [2023-08-24 15:47:52,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312793427230047 [2023-08-24 15:47:52,390 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2258 transitions. [2023-08-24 15:47:52,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2258 transitions. [2023-08-24 15:47:52,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:52,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2258 transitions. [2023-08-24 15:47:52,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.08333333333333) internal successors, (2258), 24 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states 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 15:47:52,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 284.0) internal successors, (7100), 25 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states 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 15:47:52,401 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 284.0) internal successors, (7100), 25 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states 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 15:47:52,401 INFO L175 Difference]: Start difference. First operand has 134 places, 182 transitions, 2423 flow. Second operand 24 states and 2258 transitions. [2023-08-24 15:47:52,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 348 transitions, 4419 flow [2023-08-24 15:47:52,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 348 transitions, 4201 flow, removed 102 selfloop flow, removed 10 redundant places. [2023-08-24 15:47:52,474 INFO L231 Difference]: Finished difference. Result has 157 places, 224 transitions, 3304 flow [2023-08-24 15:47:52,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3304, PETRI_PLACES=157, PETRI_TRANSITIONS=224} [2023-08-24 15:47:52,475 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2023-08-24 15:47:52,475 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 224 transitions, 3304 flow [2023-08-24 15:47:52,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 88.03225806451613) internal successors, (2729), 31 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states 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 15:47:52,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:52,476 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] [2023-08-24 15:47:52,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-24 15:47:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 15:47:52,682 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 15:47:52,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1238853007, now seen corresponding path program 12 times [2023-08-24 15:47:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:52,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710825546] [2023-08-24 15:47:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:52,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:53,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:53,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710825546] [2023-08-24 15:47:53,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710825546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:53,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747992640] [2023-08-24 15:47:53,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:47:53,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:53,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:53,621 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 15:47:53,645 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 15:47:53,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 15:47:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:47:53,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:47:53,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:47:53,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:47:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747992640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:47:53,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:47:53,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-24 15:47:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784256594] [2023-08-24 15:47:53,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:47:53,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:47:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:53,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:47:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:47:53,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 15:47:53,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 224 transitions, 3304 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:53,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:53,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 15:47:53,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:47:54,291 INFO L124 PetriNetUnfolderBase]: 1043/1884 cut-off events. [2023-08-24 15:47:54,291 INFO L125 PetriNetUnfolderBase]: For 27927/27927 co-relation queries the response was YES. [2023-08-24 15:47:54,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13853 conditions, 1884 events. 1043/1884 cut-off events. For 27927/27927 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10558 event pairs, 194 based on Foata normal form. 2/1885 useless extension candidates. Maximal degree in co-relation 13757. Up to 1365 conditions per place. [2023-08-24 15:47:54,306 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 189 selfloop transitions, 69 changer transitions 14/272 dead transitions. [2023-08-24 15:47:54,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 272 transitions, 4383 flow [2023-08-24 15:47:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:47:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:47:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 968 transitions. [2023-08-24 15:47:54,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426056338028169 [2023-08-24 15:47:54,309 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 968 transitions. [2023-08-24 15:47:54,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 968 transitions. [2023-08-24 15:47:54,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:47:54,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 968 transitions. [2023-08-24 15:47:54,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 15:47:54,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:54,313 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:47:54,313 INFO L175 Difference]: Start difference. First operand has 157 places, 224 transitions, 3304 flow. Second operand 8 states and 968 transitions. [2023-08-24 15:47:54,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 272 transitions, 4383 flow [2023-08-24 15:47:54,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 272 transitions, 4150 flow, removed 92 selfloop flow, removed 6 redundant places. [2023-08-24 15:47:54,429 INFO L231 Difference]: Finished difference. Result has 159 places, 239 transitions, 3548 flow [2023-08-24 15:47:54,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3548, PETRI_PLACES=159, PETRI_TRANSITIONS=239} [2023-08-24 15:47:54,430 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2023-08-24 15:47:54,430 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 239 transitions, 3548 flow [2023-08-24 15:47:54,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 15:47:54,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:47:54,430 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] [2023-08-24 15:47:54,435 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 15:47:54,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 15:47:54,631 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 15:47:54,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:47:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1570608447, now seen corresponding path program 13 times [2023-08-24 15:47:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:47:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950289756] [2023-08-24 15:47:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:47:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:47:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:56,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:47:56,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950289756] [2023-08-24 15:47:56,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950289756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:47:56,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249105479] [2023-08-24 15:47:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:47:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:47:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:47:56,317 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 15:47:56,319 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 15:47:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:47:56,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 15:47:56,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:47:56,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:47:56,634 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 20 treesize of output 22 [2023-08-24 15:47:56,806 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 15:47:56,806 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 85 treesize of output 41 [2023-08-24 15:47:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:56,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:47:57,140 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:47:57,140 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 110 treesize of output 113 [2023-08-24 15:47:57,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:47:57,162 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 57 treesize of output 56 [2023-08-24 15:47:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:47:57,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249105479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:47:57,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:47:57,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-24 15:47:57,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195877240] [2023-08-24 15:47:57,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:47:57,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 15:47:57,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:47:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 15:47:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2023-08-24 15:47:57,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 284 [2023-08-24 15:47:57,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 239 transitions, 3548 flow. Second operand has 33 states, 33 states have (on average 87.9090909090909) internal successors, (2901), 33 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states 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 15:47:57,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:47:57,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 284 [2023-08-24 15:47:57,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:01,403 INFO L124 PetriNetUnfolderBase]: 1189/2236 cut-off events. [2023-08-24 15:48:01,403 INFO L125 PetriNetUnfolderBase]: For 35617/35617 co-relation queries the response was YES. [2023-08-24 15:48:01,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16176 conditions, 2236 events. 1189/2236 cut-off events. For 35617/35617 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13669 event pairs, 244 based on Foata normal form. 3/2238 useless extension candidates. Maximal degree in co-relation 16073. Up to 918 conditions per place. [2023-08-24 15:48:01,420 INFO L140 encePairwiseOnDemand]: 272/284 looper letters, 255 selfloop transitions, 92 changer transitions 22/369 dead transitions. [2023-08-24 15:48:01,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 369 transitions, 5399 flow [2023-08-24 15:48:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 15:48:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 15:48:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1882 transitions. [2023-08-24 15:48:01,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313380281690141 [2023-08-24 15:48:01,440 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1882 transitions. [2023-08-24 15:48:01,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1882 transitions. [2023-08-24 15:48:01,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:01,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1882 transitions. [2023-08-24 15:48:01,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.1) internal successors, (1882), 20 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states 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 15:48:01,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states 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 15:48:01,453 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states 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 15:48:01,453 INFO L175 Difference]: Start difference. First operand has 159 places, 239 transitions, 3548 flow. Second operand 20 states and 1882 transitions. [2023-08-24 15:48:01,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 369 transitions, 5399 flow [2023-08-24 15:48:01,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 369 transitions, 5236 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-24 15:48:01,574 INFO L231 Difference]: Finished difference. Result has 178 places, 257 transitions, 3928 flow [2023-08-24 15:48:01,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3928, PETRI_PLACES=178, PETRI_TRANSITIONS=257} [2023-08-24 15:48:01,574 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 149 predicate places. [2023-08-24 15:48:01,575 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 257 transitions, 3928 flow [2023-08-24 15:48:01,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 87.9090909090909) internal successors, (2901), 33 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states 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 15:48:01,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:01,575 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] [2023-08-24 15:48:01,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 15:48:01,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 15:48:01,781 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 15:48:01,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash -527425867, now seen corresponding path program 1 times [2023-08-24 15:48:01,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:01,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214788697] [2023-08-24 15:48:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:01,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:48:01,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214788697] [2023-08-24 15:48:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214788697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:01,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:48:01,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:48:01,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104445224] [2023-08-24 15:48:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:48:01,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:48:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:48:01,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 15:48:01,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 257 transitions, 3928 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:01,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:01,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 15:48:01,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:02,280 INFO L124 PetriNetUnfolderBase]: 1148/2114 cut-off events. [2023-08-24 15:48:02,280 INFO L125 PetriNetUnfolderBase]: For 33713/33713 co-relation queries the response was YES. [2023-08-24 15:48:02,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15682 conditions, 2114 events. 1148/2114 cut-off events. For 33713/33713 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12405 event pairs, 140 based on Foata normal form. 84/2197 useless extension candidates. Maximal degree in co-relation 15580. Up to 1332 conditions per place. [2023-08-24 15:48:02,298 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 219 selfloop transitions, 92 changer transitions 0/311 dead transitions. [2023-08-24 15:48:02,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 311 transitions, 5122 flow [2023-08-24 15:48:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:48:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:48:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 796 transitions. [2023-08-24 15:48:02,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671361502347418 [2023-08-24 15:48:02,300 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 796 transitions. [2023-08-24 15:48:02,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 796 transitions. [2023-08-24 15:48:02,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:02,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 796 transitions. [2023-08-24 15:48:02,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.66666666666666) internal successors, (796), 6 states have internal predecessors, (796), 0 states have call successors, (0), 0 states 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 15:48:02,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states 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 15:48:02,303 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states 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 15:48:02,303 INFO L175 Difference]: Start difference. First operand has 178 places, 257 transitions, 3928 flow. Second operand 6 states and 796 transitions. [2023-08-24 15:48:02,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 311 transitions, 5122 flow [2023-08-24 15:48:02,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 311 transitions, 4988 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-24 15:48:02,455 INFO L231 Difference]: Finished difference. Result has 174 places, 265 transitions, 4177 flow [2023-08-24 15:48:02,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4177, PETRI_PLACES=174, PETRI_TRANSITIONS=265} [2023-08-24 15:48:02,455 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2023-08-24 15:48:02,455 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 265 transitions, 4177 flow [2023-08-24 15:48:02,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:02,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:02,456 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] [2023-08-24 15:48:02,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 15:48:02,456 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 15:48:02,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash 369718118, now seen corresponding path program 1 times [2023-08-24 15:48:02,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:02,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252874725] [2023-08-24 15:48:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:02,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:48:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252874725] [2023-08-24 15:48:02,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252874725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:02,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:48:02,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:48:02,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689158694] [2023-08-24 15:48:02,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:02,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:48:02,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:48:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:48:02,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 15:48:02,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 265 transitions, 4177 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:02,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:02,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 15:48:02,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:02,895 INFO L124 PetriNetUnfolderBase]: 910/1758 cut-off events. [2023-08-24 15:48:02,895 INFO L125 PetriNetUnfolderBase]: For 29983/29983 co-relation queries the response was YES. [2023-08-24 15:48:02,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13230 conditions, 1758 events. 910/1758 cut-off events. For 29983/29983 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10507 event pairs, 213 based on Foata normal form. 98/1855 useless extension candidates. Maximal degree in co-relation 13081. Up to 1163 conditions per place. [2023-08-24 15:48:02,907 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 171 selfloop transitions, 53 changer transitions 32/256 dead transitions. [2023-08-24 15:48:02,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 256 transitions, 4298 flow [2023-08-24 15:48:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:48:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:48:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-08-24 15:48:02,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676056338028169 [2023-08-24 15:48:02,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-08-24 15:48:02,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-08-24 15:48:02,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:02,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-08-24 15:48:02,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 15:48:02,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:02,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:02,912 INFO L175 Difference]: Start difference. First operand has 174 places, 265 transitions, 4177 flow. Second operand 5 states and 664 transitions. [2023-08-24 15:48:02,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 256 transitions, 4298 flow [2023-08-24 15:48:03,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 256 transitions, 4113 flow, removed 33 selfloop flow, removed 6 redundant places. [2023-08-24 15:48:03,027 INFO L231 Difference]: Finished difference. Result has 168 places, 206 transitions, 3087 flow [2023-08-24 15:48:03,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3087, PETRI_PLACES=168, PETRI_TRANSITIONS=206} [2023-08-24 15:48:03,028 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 139 predicate places. [2023-08-24 15:48:03,028 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 206 transitions, 3087 flow [2023-08-24 15:48:03,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:03,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:03,028 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] [2023-08-24 15:48:03,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 15:48:03,028 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 15:48:03,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2136284605, now seen corresponding path program 2 times [2023-08-24 15:48:03,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:03,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96614815] [2023-08-24 15:48:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:03,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:48:03,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:03,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96614815] [2023-08-24 15:48:03,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96614815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:03,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:48:03,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:48:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597755419] [2023-08-24 15:48:03,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:03,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:48:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:48:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:48:03,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 15:48:03,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 206 transitions, 3087 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:03,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:03,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 15:48:03,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:03,425 INFO L124 PetriNetUnfolderBase]: 916/1694 cut-off events. [2023-08-24 15:48:03,425 INFO L125 PetriNetUnfolderBase]: For 26450/26450 co-relation queries the response was YES. [2023-08-24 15:48:03,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12469 conditions, 1694 events. 916/1694 cut-off events. For 26450/26450 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9461 event pairs, 248 based on Foata normal form. 34/1727 useless extension candidates. Maximal degree in co-relation 12407. Up to 1377 conditions per place. [2023-08-24 15:48:03,436 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 171 selfloop transitions, 63 changer transitions 0/234 dead transitions. [2023-08-24 15:48:03,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 234 transitions, 3886 flow [2023-08-24 15:48:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:48:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:48:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-08-24 15:48:03,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46338028169014084 [2023-08-24 15:48:03,438 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-08-24 15:48:03,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-08-24 15:48:03,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:03,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-08-24 15:48:03,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 15:48:03,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:03,440 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:03,440 INFO L175 Difference]: Start difference. First operand has 168 places, 206 transitions, 3087 flow. Second operand 5 states and 658 transitions. [2023-08-24 15:48:03,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 234 transitions, 3886 flow [2023-08-24 15:48:03,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 234 transitions, 3685 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-08-24 15:48:03,504 INFO L231 Difference]: Finished difference. Result has 155 places, 211 transitions, 3116 flow [2023-08-24 15:48:03,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3116, PETRI_PLACES=155, PETRI_TRANSITIONS=211} [2023-08-24 15:48:03,505 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 15:48:03,505 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 211 transitions, 3116 flow [2023-08-24 15:48:03,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:03,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:03,505 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] [2023-08-24 15:48:03,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 15:48:03,505 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 15:48:03,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1674963003, now seen corresponding path program 3 times [2023-08-24 15:48:03,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:03,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243720955] [2023-08-24 15:48:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:48:03,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243720955] [2023-08-24 15:48:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243720955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:03,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:48:03,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:48:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155812536] [2023-08-24 15:48:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:03,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:48:03,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:48:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:48:03,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 15:48:03,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 211 transitions, 3116 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:03,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:03,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 15:48:03,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:03,872 INFO L124 PetriNetUnfolderBase]: 891/1665 cut-off events. [2023-08-24 15:48:03,872 INFO L125 PetriNetUnfolderBase]: For 24353/24353 co-relation queries the response was YES. [2023-08-24 15:48:03,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12125 conditions, 1665 events. 891/1665 cut-off events. For 24353/24353 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9379 event pairs, 255 based on Foata normal form. 18/1682 useless extension candidates. Maximal degree in co-relation 12067. Up to 1409 conditions per place. [2023-08-24 15:48:03,881 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 162 selfloop transitions, 55 changer transitions 2/219 dead transitions. [2023-08-24 15:48:03,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 219 transitions, 3608 flow [2023-08-24 15:48:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:48:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:48:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-24 15:48:03,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46056338028169014 [2023-08-24 15:48:03,883 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-24 15:48:03,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-24 15:48:03,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:03,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-24 15:48:03,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states 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 15:48:03,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:03,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:03,886 INFO L175 Difference]: Start difference. First operand has 155 places, 211 transitions, 3116 flow. Second operand 5 states and 654 transitions. [2023-08-24 15:48:03,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 219 transitions, 3608 flow [2023-08-24 15:48:03,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 219 transitions, 3496 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 15:48:03,943 INFO L231 Difference]: Finished difference. Result has 155 places, 204 transitions, 3011 flow [2023-08-24 15:48:03,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3011, PETRI_PLACES=155, PETRI_TRANSITIONS=204} [2023-08-24 15:48:03,944 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 15:48:03,944 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 204 transitions, 3011 flow [2023-08-24 15:48:03,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:03,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:03,944 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] [2023-08-24 15:48:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 15:48:03,945 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 15:48:03,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash -629040469, now seen corresponding path program 4 times [2023-08-24 15:48:03,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:03,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353687906] [2023-08-24 15:48:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:03,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:48:04,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353687906] [2023-08-24 15:48:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353687906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:04,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:48:04,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:48:04,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788770804] [2023-08-24 15:48:04,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:48:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:48:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:48:04,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 15:48:04,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 204 transitions, 3011 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:04,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:04,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 15:48:04,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:04,345 INFO L124 PetriNetUnfolderBase]: 890/1650 cut-off events. [2023-08-24 15:48:04,345 INFO L125 PetriNetUnfolderBase]: For 24340/24340 co-relation queries the response was YES. [2023-08-24 15:48:04,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 1650 events. 890/1650 cut-off events. For 24340/24340 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9230 event pairs, 214 based on Foata normal form. 34/1683 useless extension candidates. Maximal degree in co-relation 11885. Up to 1251 conditions per place. [2023-08-24 15:48:04,360 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 161 selfloop transitions, 68 changer transitions 0/229 dead transitions. [2023-08-24 15:48:04,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 229 transitions, 3729 flow [2023-08-24 15:48:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:48:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:48:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-08-24 15:48:04,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46338028169014084 [2023-08-24 15:48:04,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-08-24 15:48:04,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-08-24 15:48:04,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:04,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-08-24 15:48:04,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 15:48:04,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:04,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:04,364 INFO L175 Difference]: Start difference. First operand has 155 places, 204 transitions, 3011 flow. Second operand 5 states and 658 transitions. [2023-08-24 15:48:04,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 229 transitions, 3729 flow [2023-08-24 15:48:04,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 229 transitions, 3604 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-24 15:48:04,443 INFO L231 Difference]: Finished difference. Result has 156 places, 207 transitions, 3114 flow [2023-08-24 15:48:04,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3114, PETRI_PLACES=156, PETRI_TRANSITIONS=207} [2023-08-24 15:48:04,444 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-08-24 15:48:04,444 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 207 transitions, 3114 flow [2023-08-24 15:48:04,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:04,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:04,445 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] [2023-08-24 15:48:04,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 15:48:04,445 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 15:48:04,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash 961696553, now seen corresponding path program 5 times [2023-08-24 15:48:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:04,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763355146] [2023-08-24 15:48:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:04,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:48:04,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:04,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763355146] [2023-08-24 15:48:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763355146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:04,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:48:04,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:48:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236681634] [2023-08-24 15:48:04,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:04,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:48:04,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:48:04,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:48:04,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 15:48:04,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 207 transitions, 3114 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:04,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:04,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 15:48:04,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:04,854 INFO L124 PetriNetUnfolderBase]: 823/1528 cut-off events. [2023-08-24 15:48:04,854 INFO L125 PetriNetUnfolderBase]: For 23080/23080 co-relation queries the response was YES. [2023-08-24 15:48:04,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11657 conditions, 1528 events. 823/1528 cut-off events. For 23080/23080 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8364 event pairs, 150 based on Foata normal form. 36/1563 useless extension candidates. Maximal degree in co-relation 11600. Up to 903 conditions per place. [2023-08-24 15:48:04,862 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 151 selfloop transitions, 58 changer transitions 7/216 dead transitions. [2023-08-24 15:48:04,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 216 transitions, 3512 flow [2023-08-24 15:48:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:48:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:48:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 660 transitions. [2023-08-24 15:48:04,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647887323943662 [2023-08-24 15:48:04,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 660 transitions. [2023-08-24 15:48:04,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 660 transitions. [2023-08-24 15:48:04,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:04,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 660 transitions. [2023-08-24 15:48:04,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 15:48:04,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:04,868 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 15:48:04,868 INFO L175 Difference]: Start difference. First operand has 156 places, 207 transitions, 3114 flow. Second operand 5 states and 660 transitions. [2023-08-24 15:48:04,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 216 transitions, 3512 flow [2023-08-24 15:48:04,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 216 transitions, 3376 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-24 15:48:04,924 INFO L231 Difference]: Finished difference. Result has 151 places, 189 transitions, 2814 flow [2023-08-24 15:48:04,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2814, PETRI_PLACES=151, PETRI_TRANSITIONS=189} [2023-08-24 15:48:04,924 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2023-08-24 15:48:04,924 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 189 transitions, 2814 flow [2023-08-24 15:48:04,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 15:48:04,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:04,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:04,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 15:48:04,925 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 15:48:04,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1258033835, now seen corresponding path program 14 times [2023-08-24 15:48:04,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:04,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383131697] [2023-08-24 15:48:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:04,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:07,480 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 15:48:07,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:07,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383131697] [2023-08-24 15:48:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383131697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:07,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51184197] [2023-08-24 15:48:07,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:48:07,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:07,482 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 15:48:07,484 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 15:48:07,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 15:48:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:07,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 15:48:07,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:07,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:07,742 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 20 treesize of output 22 [2023-08-24 15:48:07,849 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 15:48:07,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:48:07,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51184197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:07,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:48:07,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 15:48:07,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621477896] [2023-08-24 15:48:07,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:07,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:07,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:07,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:48:07,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:07,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 189 transitions, 2814 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:07,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:07,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:08,276 INFO L124 PetriNetUnfolderBase]: 822/1525 cut-off events. [2023-08-24 15:48:08,277 INFO L125 PetriNetUnfolderBase]: For 23046/23046 co-relation queries the response was YES. [2023-08-24 15:48:08,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11441 conditions, 1525 events. 822/1525 cut-off events. For 23046/23046 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8346 event pairs, 154 based on Foata normal form. 1/1525 useless extension candidates. Maximal degree in co-relation 11388. Up to 966 conditions per place. [2023-08-24 15:48:08,284 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 149 selfloop transitions, 55 changer transitions 18/222 dead transitions. [2023-08-24 15:48:08,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 222 transitions, 3502 flow [2023-08-24 15:48:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:48:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:48:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 912 transitions. [2023-08-24 15:48:08,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014084507042254 [2023-08-24 15:48:08,285 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 912 transitions. [2023-08-24 15:48:08,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 912 transitions. [2023-08-24 15:48:08,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:08,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 912 transitions. [2023-08-24 15:48:08,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 15:48:08,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:08,288 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:08,288 INFO L175 Difference]: Start difference. First operand has 151 places, 189 transitions, 2814 flow. Second operand 8 states and 912 transitions. [2023-08-24 15:48:08,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 222 transitions, 3502 flow [2023-08-24 15:48:08,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 222 transitions, 3397 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 15:48:08,333 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 2813 flow [2023-08-24 15:48:08,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2813, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2023-08-24 15:48:08,333 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 15:48:08,334 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 2813 flow [2023-08-24 15:48:08,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:08,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:08,334 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:08,339 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 15:48:08,534 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,SelfDestructingSolverStorable20 [2023-08-24 15:48:08,534 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 15:48:08,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:08,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1857224947, now seen corresponding path program 15 times [2023-08-24 15:48:08,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:08,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910931751] [2023-08-24 15:48:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:08,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:09,839 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 15:48:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910931751] [2023-08-24 15:48:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910931751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336100709] [2023-08-24 15:48:09,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:48:09,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:09,841 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 15:48:09,842 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 15:48:09,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 15:48:09,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:09,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 15:48:09,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:10,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 15:48:10,231 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 15:48:10,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:48:10,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336100709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:10,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:48:10,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 15:48:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76139658] [2023-08-24 15:48:10,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:10,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:10,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:48:10,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:10,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 2813 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:10,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:10,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:10,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:10,668 INFO L124 PetriNetUnfolderBase]: 816/1514 cut-off events. [2023-08-24 15:48:10,668 INFO L125 PetriNetUnfolderBase]: For 22622/22622 co-relation queries the response was YES. [2023-08-24 15:48:10,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11413 conditions, 1514 events. 816/1514 cut-off events. For 22622/22622 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8264 event pairs, 154 based on Foata normal form. 1/1514 useless extension candidates. Maximal degree in co-relation 11357. Up to 965 conditions per place. [2023-08-24 15:48:10,677 INFO L140 encePairwiseOnDemand]: 275/284 looper letters, 149 selfloop transitions, 50 changer transitions 20/219 dead transitions. [2023-08-24 15:48:10,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 219 transitions, 3478 flow [2023-08-24 15:48:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:48:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:48:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 912 transitions. [2023-08-24 15:48:10,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014084507042254 [2023-08-24 15:48:10,679 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 912 transitions. [2023-08-24 15:48:10,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 912 transitions. [2023-08-24 15:48:10,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:10,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 912 transitions. [2023-08-24 15:48:10,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 15:48:10,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:10,682 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:10,683 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 2813 flow. Second operand 8 states and 912 transitions. [2023-08-24 15:48:10,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 219 transitions, 3478 flow [2023-08-24 15:48:10,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 219 transitions, 3368 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 15:48:10,742 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 2694 flow [2023-08-24 15:48:10,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2694, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2023-08-24 15:48:10,743 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-08-24 15:48:10,743 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 2694 flow [2023-08-24 15:48:10,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:10,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:10,743 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:10,748 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 15:48:10,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:10,944 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 15:48:10,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2119374045, now seen corresponding path program 16 times [2023-08-24 15:48:10,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:10,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338497161] [2023-08-24 15:48:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:12,994 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 15:48:12,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338497161] [2023-08-24 15:48:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338497161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324822740] [2023-08-24 15:48:12,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:48:12,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:12,996 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 15:48:12,998 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 15:48:13,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:48:13,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:13,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 15:48:13,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:13,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:13,266 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 20 treesize of output 22 [2023-08-24 15:48:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:48:13,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:13,466 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_929 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_929) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296))) (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296)))))) is different from false [2023-08-24 15:48:13,495 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:13,495 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 112 treesize of output 114 [2023-08-24 15:48:13,513 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:13,513 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 58 treesize of output 56 [2023-08-24 15:48:13,749 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 15:48:13,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324822740] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:13,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:48:13,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-24 15:48:13,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471427357] [2023-08-24 15:48:13,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:13,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:13,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2023-08-24 15:48:13,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:13,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 2694 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:13,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:13,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:13,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:14,229 INFO L124 PetriNetUnfolderBase]: 803/1485 cut-off events. [2023-08-24 15:48:14,230 INFO L125 PetriNetUnfolderBase]: For 21989/21989 co-relation queries the response was YES. [2023-08-24 15:48:14,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11117 conditions, 1485 events. 803/1485 cut-off events. For 21989/21989 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8046 event pairs, 130 based on Foata normal form. 1/1485 useless extension candidates. Maximal degree in co-relation 11061. Up to 709 conditions per place. [2023-08-24 15:48:14,239 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 144 selfloop transitions, 63 changer transitions 20/227 dead transitions. [2023-08-24 15:48:14,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 227 transitions, 3560 flow [2023-08-24 15:48:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:48:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:48:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1023 transitions. [2023-08-24 15:48:14,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40023474178403756 [2023-08-24 15:48:14,240 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1023 transitions. [2023-08-24 15:48:14,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1023 transitions. [2023-08-24 15:48:14,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:14,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1023 transitions. [2023-08-24 15:48:14,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.66666666666667) internal successors, (1023), 9 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states 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 15:48:14,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:14,244 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:14,244 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 2694 flow. Second operand 9 states and 1023 transitions. [2023-08-24 15:48:14,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 227 transitions, 3560 flow [2023-08-24 15:48:14,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 227 transitions, 3404 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-08-24 15:48:14,296 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 2698 flow [2023-08-24 15:48:14,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2698, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2023-08-24 15:48:14,296 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 15:48:14,296 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 2698 flow [2023-08-24 15:48:14,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:14,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:14,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:14,302 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 15:48:14,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:14,499 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:48:14,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:14,499 INFO L85 PathProgramCache]: Analyzing trace with hash -68809131, now seen corresponding path program 17 times [2023-08-24 15:48:14,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:14,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578617583] [2023-08-24 15:48:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:14,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:16,300 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 15:48:16,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:16,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578617583] [2023-08-24 15:48:16,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578617583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:16,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095337357] [2023-08-24 15:48:16,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:48:16,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:16,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:16,301 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 15:48:16,303 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 15:48:16,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:48:16,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:16,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 15:48:16,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:16,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 15:48:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:48:16,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:16,889 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:16,890 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 87 treesize of output 89 [2023-08-24 15:48:17,011 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:17,012 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 20 treesize of output 7 [2023-08-24 15:48:17,154 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 15:48:17,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095337357] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:17,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:48:17,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 15:48:17,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173964664] [2023-08-24 15:48:17,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:17,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:17,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=890, Unknown=4, NotChecked=0, Total=992 [2023-08-24 15:48:17,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:17,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 2698 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:17,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:17,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:17,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:17,713 INFO L124 PetriNetUnfolderBase]: 793/1468 cut-off events. [2023-08-24 15:48:17,713 INFO L125 PetriNetUnfolderBase]: For 21301/21301 co-relation queries the response was YES. [2023-08-24 15:48:17,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11207 conditions, 1468 events. 793/1468 cut-off events. For 21301/21301 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7920 event pairs, 132 based on Foata normal form. 1/1468 useless extension candidates. Maximal degree in co-relation 11151. Up to 708 conditions per place. [2023-08-24 15:48:17,721 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 144 selfloop transitions, 58 changer transitions 24/226 dead transitions. [2023-08-24 15:48:17,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 226 transitions, 3527 flow [2023-08-24 15:48:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:48:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:48:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1025 transitions. [2023-08-24 15:48:17,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010172143974961 [2023-08-24 15:48:17,723 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1025 transitions. [2023-08-24 15:48:17,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1025 transitions. [2023-08-24 15:48:17,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:17,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1025 transitions. [2023-08-24 15:48:17,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.88888888888889) internal successors, (1025), 9 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 15:48:17,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:17,726 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:17,726 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 2698 flow. Second operand 9 states and 1025 transitions. [2023-08-24 15:48:17,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 226 transitions, 3527 flow [2023-08-24 15:48:17,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 226 transitions, 3410 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-24 15:48:17,785 INFO L231 Difference]: Finished difference. Result has 156 places, 175 transitions, 2600 flow [2023-08-24 15:48:17,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2600, PETRI_PLACES=156, PETRI_TRANSITIONS=175} [2023-08-24 15:48:17,786 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-08-24 15:48:17,786 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 175 transitions, 2600 flow [2023-08-24 15:48:17,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:17,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:17,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:17,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 15:48:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 15:48:17,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:48:17,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash -194105519, now seen corresponding path program 18 times [2023-08-24 15:48:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:17,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262955651] [2023-08-24 15:48:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:21,030 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 15:48:21,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:21,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262955651] [2023-08-24 15:48:21,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262955651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:21,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093940874] [2023-08-24 15:48:21,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:48:21,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:21,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:21,032 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 15:48:21,033 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 15:48:21,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 15:48:21,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:21,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 15:48:21,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:21,266 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 21 treesize of output 23 [2023-08-24 15:48:21,398 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 15:48:21,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:48:21,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093940874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:21,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:48:21,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 15:48:21,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852379753] [2023-08-24 15:48:21,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:21,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:48:21,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:21,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 175 transitions, 2600 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:21,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:21,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:21,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:21,776 INFO L124 PetriNetUnfolderBase]: 786/1445 cut-off events. [2023-08-24 15:48:21,776 INFO L125 PetriNetUnfolderBase]: For 21124/21124 co-relation queries the response was YES. [2023-08-24 15:48:21,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11017 conditions, 1445 events. 786/1445 cut-off events. For 21124/21124 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7668 event pairs, 131 based on Foata normal form. 1/1445 useless extension candidates. Maximal degree in co-relation 10961. Up to 879 conditions per place. [2023-08-24 15:48:21,785 INFO L140 encePairwiseOnDemand]: 275/284 looper letters, 135 selfloop transitions, 47 changer transitions 21/203 dead transitions. [2023-08-24 15:48:21,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 203 transitions, 3217 flow [2023-08-24 15:48:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:48:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:48:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2023-08-24 15:48:21,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983274647887324 [2023-08-24 15:48:21,787 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2023-08-24 15:48:21,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2023-08-24 15:48:21,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:21,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2023-08-24 15:48:21,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 15:48:21,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:21,789 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:21,789 INFO L175 Difference]: Start difference. First operand has 156 places, 175 transitions, 2600 flow. Second operand 8 states and 905 transitions. [2023-08-24 15:48:21,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 203 transitions, 3217 flow [2023-08-24 15:48:21,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 203 transitions, 3033 flow, removed 34 selfloop flow, removed 9 redundant places. [2023-08-24 15:48:21,839 INFO L231 Difference]: Finished difference. Result has 151 places, 169 transitions, 2473 flow [2023-08-24 15:48:21,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2473, PETRI_PLACES=151, PETRI_TRANSITIONS=169} [2023-08-24 15:48:21,839 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2023-08-24 15:48:21,840 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 169 transitions, 2473 flow [2023-08-24 15:48:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:21,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:21,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:21,845 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 15:48:22,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:22,041 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:48:22,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1761353845, now seen corresponding path program 19 times [2023-08-24 15:48:22,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:22,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826481297] [2023-08-24 15:48:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:22,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:23,793 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 15:48:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:23,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826481297] [2023-08-24 15:48:23,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826481297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:23,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963677306] [2023-08-24 15:48:23,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:48:23,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:23,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:23,794 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 15:48:23,796 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 15:48:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:23,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 15:48:23,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:24,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 15:48:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:48:24,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:24,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:24,457 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 85 treesize of output 87 [2023-08-24 15:48:24,462 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:24,462 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 20 treesize of output 7 [2023-08-24 15:48:24,692 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 15:48:24,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963677306] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:24,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:48:24,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 15:48:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654536839] [2023-08-24 15:48:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:24,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=892, Unknown=4, NotChecked=0, Total=992 [2023-08-24 15:48:24,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:24,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 169 transitions, 2473 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:24,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:24,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:24,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:25,250 INFO L124 PetriNetUnfolderBase]: 778/1431 cut-off events. [2023-08-24 15:48:25,250 INFO L125 PetriNetUnfolderBase]: For 19832/19832 co-relation queries the response was YES. [2023-08-24 15:48:25,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10536 conditions, 1431 events. 778/1431 cut-off events. For 19832/19832 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7584 event pairs, 109 based on Foata normal form. 1/1431 useless extension candidates. Maximal degree in co-relation 10482. Up to 643 conditions per place. [2023-08-24 15:48:25,258 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 131 selfloop transitions, 55 changer transitions 29/215 dead transitions. [2023-08-24 15:48:25,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 215 transitions, 3228 flow [2023-08-24 15:48:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:48:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:48:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1129 transitions. [2023-08-24 15:48:25,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39753521126760566 [2023-08-24 15:48:25,260 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1129 transitions. [2023-08-24 15:48:25,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1129 transitions. [2023-08-24 15:48:25,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:25,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1129 transitions. [2023-08-24 15:48:25,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.9) internal successors, (1129), 10 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:48:25,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 284.0) internal successors, (3124), 11 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states 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 15:48:25,264 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 284.0) internal successors, (3124), 11 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states 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 15:48:25,264 INFO L175 Difference]: Start difference. First operand has 151 places, 169 transitions, 2473 flow. Second operand 10 states and 1129 transitions. [2023-08-24 15:48:25,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 215 transitions, 3228 flow [2023-08-24 15:48:25,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 215 transitions, 3099 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-24 15:48:25,319 INFO L231 Difference]: Finished difference. Result has 150 places, 163 transitions, 2364 flow [2023-08-24 15:48:25,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2364, PETRI_PLACES=150, PETRI_TRANSITIONS=163} [2023-08-24 15:48:25,320 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2023-08-24 15:48:25,320 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 163 transitions, 2364 flow [2023-08-24 15:48:25,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:25,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:25,320 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:25,326 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 15:48:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:25,525 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 15:48:25,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash 164084765, now seen corresponding path program 20 times [2023-08-24 15:48:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:25,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234866807] [2023-08-24 15:48:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:25,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:26,596 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 15:48:26,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234866807] [2023-08-24 15:48:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234866807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171962545] [2023-08-24 15:48:26,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:48:26,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:26,598 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 15:48:26,601 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 15:48:26,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 15:48:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:26,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 15:48:26,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:26,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:26,853 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 21 treesize of output 23 [2023-08-24 15:48:26,939 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 15:48:26,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:48:26,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171962545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:26,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:48:26,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 15:48:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101118177] [2023-08-24 15:48:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:26,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:48:26,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:26,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 163 transitions, 2364 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:26,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:26,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:27,287 INFO L124 PetriNetUnfolderBase]: 763/1392 cut-off events. [2023-08-24 15:48:27,287 INFO L125 PetriNetUnfolderBase]: For 19539/19539 co-relation queries the response was YES. [2023-08-24 15:48:27,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10206 conditions, 1392 events. 763/1392 cut-off events. For 19539/19539 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7212 event pairs, 129 based on Foata normal form. 1/1392 useless extension candidates. Maximal degree in co-relation 10154. Up to 839 conditions per place. [2023-08-24 15:48:27,295 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 128 selfloop transitions, 50 changer transitions 16/194 dead transitions. [2023-08-24 15:48:27,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 194 transitions, 2966 flow [2023-08-24 15:48:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:48:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:48:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2023-08-24 15:48:27,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008802816901406 [2023-08-24 15:48:27,297 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2023-08-24 15:48:27,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2023-08-24 15:48:27,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:27,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2023-08-24 15:48:27,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 states 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 15:48:27,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:27,300 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:27,300 INFO L175 Difference]: Start difference. First operand has 150 places, 163 transitions, 2364 flow. Second operand 8 states and 909 transitions. [2023-08-24 15:48:27,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 194 transitions, 2966 flow [2023-08-24 15:48:27,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 2805 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-24 15:48:27,341 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 2285 flow [2023-08-24 15:48:27,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2285, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2023-08-24 15:48:27,342 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-24 15:48:27,342 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 2285 flow [2023-08-24 15:48:27,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:27,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:27,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:27,347 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 15:48:27,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:27,543 INFO L420 AbstractCegarLoop]: === Iteration 28 === 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 15:48:27,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1637841409, now seen corresponding path program 21 times [2023-08-24 15:48:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326007462] [2023-08-24 15:48:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:30,425 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 15:48:30,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:30,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326007462] [2023-08-24 15:48:30,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326007462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:30,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894684349] [2023-08-24 15:48:30,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:48:30,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:30,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:30,429 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:48:30,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 15:48:30,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 15:48:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:30,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 15:48:30,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:30,746 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 20 treesize of output 22 [2023-08-24 15:48:30,883 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 15:48:30,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:48:30,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894684349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:48:30,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:48:30,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 15:48:30,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53578153] [2023-08-24 15:48:30,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:30,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:30,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:48:30,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:30,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 2285 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:30,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:30,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:30,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:31,251 INFO L124 PetriNetUnfolderBase]: 759/1385 cut-off events. [2023-08-24 15:48:31,252 INFO L125 PetriNetUnfolderBase]: For 18118/18118 co-relation queries the response was YES. [2023-08-24 15:48:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10016 conditions, 1385 events. 759/1385 cut-off events. For 18118/18118 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7182 event pairs, 129 based on Foata normal form. 1/1385 useless extension candidates. Maximal degree in co-relation 9965. Up to 830 conditions per place. [2023-08-24 15:48:31,260 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 122 selfloop transitions, 49 changer transitions 20/191 dead transitions. [2023-08-24 15:48:31,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 191 transitions, 2873 flow [2023-08-24 15:48:31,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:48:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:48:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2023-08-24 15:48:31,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008802816901406 [2023-08-24 15:48:31,262 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2023-08-24 15:48:31,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2023-08-24 15:48:31,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:31,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2023-08-24 15:48:31,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 states 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 15:48:31,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:31,264 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 15:48:31,264 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 2285 flow. Second operand 8 states and 909 transitions. [2023-08-24 15:48:31,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 191 transitions, 2873 flow [2023-08-24 15:48:31,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 191 transitions, 2769 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-24 15:48:31,302 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 2243 flow [2023-08-24 15:48:31,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2243, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2023-08-24 15:48:31,302 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-24 15:48:31,303 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 2243 flow [2023-08-24 15:48:31,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:31,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:31,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:31,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 15:48:31,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 15:48:31,509 INFO L420 AbstractCegarLoop]: === Iteration 29 === 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 15:48:31,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash 143346487, now seen corresponding path program 22 times [2023-08-24 15:48:31,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:31,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021088986] [2023-08-24 15:48:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:33,844 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 15:48:33,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:33,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021088986] [2023-08-24 15:48:33,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021088986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:33,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288288481] [2023-08-24 15:48:33,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:48:33,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:33,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:33,846 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:48:33,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 15:48:33,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:48:33,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:33,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 15:48:33,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:34,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 15:48:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:48:34,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:34,380 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1247 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1247) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2023-08-24 15:48:34,453 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:34,454 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 87 treesize of output 89 [2023-08-24 15:48:34,459 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:34,459 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 20 treesize of output 7 [2023-08-24 15:48:34,761 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 15:48:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288288481] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:34,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:48:34,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 15:48:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74598967] [2023-08-24 15:48:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:34,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:34,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=842, Unknown=1, NotChecked=58, Total=992 [2023-08-24 15:48:34,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:34,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 157 transitions, 2243 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:34,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:34,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:34,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:35,415 INFO L124 PetriNetUnfolderBase]: 753/1376 cut-off events. [2023-08-24 15:48:35,415 INFO L125 PetriNetUnfolderBase]: For 18134/18134 co-relation queries the response was YES. [2023-08-24 15:48:35,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9950 conditions, 1376 events. 753/1376 cut-off events. For 18134/18134 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7151 event pairs, 107 based on Foata normal form. 1/1376 useless extension candidates. Maximal degree in co-relation 9899. Up to 610 conditions per place. [2023-08-24 15:48:35,424 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 125 selfloop transitions, 53 changer transitions 23/201 dead transitions. [2023-08-24 15:48:35,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 201 transitions, 2981 flow [2023-08-24 15:48:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:48:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:48:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1022 transitions. [2023-08-24 15:48:35,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998435054773083 [2023-08-24 15:48:35,426 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1022 transitions. [2023-08-24 15:48:35,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1022 transitions. [2023-08-24 15:48:35,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:35,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1022 transitions. [2023-08-24 15:48:35,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.55555555555556) internal successors, (1022), 9 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states 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 15:48:35,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:35,429 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:35,430 INFO L175 Difference]: Start difference. First operand has 144 places, 157 transitions, 2243 flow. Second operand 9 states and 1022 transitions. [2023-08-24 15:48:35,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 201 transitions, 2981 flow [2023-08-24 15:48:35,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 201 transitions, 2858 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-08-24 15:48:35,483 INFO L231 Difference]: Finished difference. Result has 143 places, 152 transitions, 2151 flow [2023-08-24 15:48:35,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=143, PETRI_TRANSITIONS=152} [2023-08-24 15:48:35,484 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2023-08-24 15:48:35,484 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 152 transitions, 2151 flow [2023-08-24 15:48:35,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:35,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:35,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:48:35,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 15:48:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 15:48:35,686 INFO L420 AbstractCegarLoop]: === Iteration 30 === 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 15:48:35,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2069380565, now seen corresponding path program 23 times [2023-08-24 15:48:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:35,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569828168] [2023-08-24 15:48:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:37,650 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 15:48:37,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:37,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569828168] [2023-08-24 15:48:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569828168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3903073] [2023-08-24 15:48:37,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:48:37,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:37,656 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:48:37,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 15:48:37,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:48:37,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:37,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 15:48:37,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:48:38,018 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 34 treesize of output 34 [2023-08-24 15:48:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:48:38,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:38,289 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:38,290 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 87 treesize of output 89 [2023-08-24 15:48:38,344 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:38,345 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 20 treesize of output 7 [2023-08-24 15:48:38,478 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 15:48:38,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3903073] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:38,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:48:38,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 15:48:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738972381] [2023-08-24 15:48:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:48:38,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:48:38,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:48:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=897, Unknown=2, NotChecked=0, Total=992 [2023-08-24 15:48:38,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 15:48:38,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 152 transitions, 2151 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:38,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:38,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 15:48:38,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:39,019 INFO L124 PetriNetUnfolderBase]: 742/1347 cut-off events. [2023-08-24 15:48:39,019 INFO L125 PetriNetUnfolderBase]: For 17994/17994 co-relation queries the response was YES. [2023-08-24 15:48:39,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9974 conditions, 1347 events. 742/1347 cut-off events. For 17994/17994 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6834 event pairs, 123 based on Foata normal form. 1/1347 useless extension candidates. Maximal degree in co-relation 9923. Up to 712 conditions per place. [2023-08-24 15:48:39,027 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 125 selfloop transitions, 46 changer transitions 26/197 dead transitions. [2023-08-24 15:48:39,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 197 transitions, 2889 flow [2023-08-24 15:48:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:48:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:48:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1021 transitions. [2023-08-24 15:48:39,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399452269170579 [2023-08-24 15:48:39,029 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1021 transitions. [2023-08-24 15:48:39,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1021 transitions. [2023-08-24 15:48:39,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:39,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1021 transitions. [2023-08-24 15:48:39,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.44444444444444) internal successors, (1021), 9 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:48:39,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:39,031 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states 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 15:48:39,031 INFO L175 Difference]: Start difference. First operand has 143 places, 152 transitions, 2151 flow. Second operand 9 states and 1021 transitions. [2023-08-24 15:48:39,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 197 transitions, 2889 flow [2023-08-24 15:48:39,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 197 transitions, 2726 flow, removed 40 selfloop flow, removed 9 redundant places. [2023-08-24 15:48:39,068 INFO L231 Difference]: Finished difference. Result has 139 places, 147 transitions, 2026 flow [2023-08-24 15:48:39,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2026, PETRI_PLACES=139, PETRI_TRANSITIONS=147} [2023-08-24 15:48:39,068 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2023-08-24 15:48:39,069 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 147 transitions, 2026 flow [2023-08-24 15:48:39,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 15:48:39,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:39,069 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] [2023-08-24 15:48:39,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 15:48:39,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:39,270 INFO L420 AbstractCegarLoop]: === Iteration 31 === 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 15:48:39,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1775559202, now seen corresponding path program 1 times [2023-08-24 15:48:39,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:39,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99813977] [2023-08-24 15:48:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:39,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:40,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99813977] [2023-08-24 15:48:40,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99813977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026662788] [2023-08-24 15:48:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:40,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:40,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:40,435 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:48:40,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 15:48:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:40,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 15:48:40,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:40,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:41,060 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:41,060 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 58 treesize of output 60 [2023-08-24 15:48:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026662788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:48:41,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:48:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-24 15:48:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587732883] [2023-08-24 15:48:41,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:48:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 15:48:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:41,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 15:48:41,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 15:48:41,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:48:41,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 147 transitions, 2026 flow. Second operand has 37 states, 37 states have (on average 85.86486486486487) internal successors, (3177), 37 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states 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 15:48:41,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:41,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:48:41,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:45,601 INFO L124 PetriNetUnfolderBase]: 1109/1897 cut-off events. [2023-08-24 15:48:45,601 INFO L125 PetriNetUnfolderBase]: For 25708/25708 co-relation queries the response was YES. [2023-08-24 15:48:45,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13700 conditions, 1897 events. 1109/1897 cut-off events. For 25708/25708 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9712 event pairs, 146 based on Foata normal form. 3/1899 useless extension candidates. Maximal degree in co-relation 13652. Up to 367 conditions per place. [2023-08-24 15:48:45,611 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 211 selfloop transitions, 134 changer transitions 39/384 dead transitions. [2023-08-24 15:48:45,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 384 transitions, 4998 flow [2023-08-24 15:48:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 15:48:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 15:48:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3126 transitions. [2023-08-24 15:48:45,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237365368682684 [2023-08-24 15:48:45,614 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3126 transitions. [2023-08-24 15:48:45,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3126 transitions. [2023-08-24 15:48:45,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:45,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3126 transitions. [2023-08-24 15:48:45,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.94117647058823) internal successors, (3126), 34 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states 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 15:48:45,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 284.0) internal successors, (9940), 35 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states 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 15:48:45,623 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 284.0) internal successors, (9940), 35 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states 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 15:48:45,623 INFO L175 Difference]: Start difference. First operand has 139 places, 147 transitions, 2026 flow. Second operand 34 states and 3126 transitions. [2023-08-24 15:48:45,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 384 transitions, 4998 flow [2023-08-24 15:48:45,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 384 transitions, 4662 flow, removed 77 selfloop flow, removed 9 redundant places. [2023-08-24 15:48:45,669 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 3468 flow [2023-08-24 15:48:45,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3468, PETRI_PLACES=176, PETRI_TRANSITIONS=222} [2023-08-24 15:48:45,670 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2023-08-24 15:48:45,670 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 3468 flow [2023-08-24 15:48:45,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 85.86486486486487) internal successors, (3177), 37 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states 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 15:48:45,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:45,670 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] [2023-08-24 15:48:45,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 15:48:45,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:45,876 INFO L420 AbstractCegarLoop]: === Iteration 32 === 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 15:48:45,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1495873550, now seen corresponding path program 2 times [2023-08-24 15:48:45,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:45,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025904938] [2023-08-24 15:48:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:45,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:47,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025904938] [2023-08-24 15:48:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025904938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683222886] [2023-08-24 15:48:47,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:48:47,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:47,057 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:48:47,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 15:48:47,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:48:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:47,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 15:48:47,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:47,280 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 15:48:47,317 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 15:48:47,352 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 15:48:47,381 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 15:48:47,663 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 15:48:47,663 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 82 treesize of output 38 [2023-08-24 15:48:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:47,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:48,660 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:48,661 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 133 treesize of output 97 [2023-08-24 15:48:48,724 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:48:48,724 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 956 treesize of output 926 [2023-08-24 15:48:48,812 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:48:48,813 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 435 treesize of output 421 [2023-08-24 15:48:48,899 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:48:48,899 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 385 treesize of output 321 [2023-08-24 15:48:48,978 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:48:48,978 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 222 treesize of output 233 [2023-08-24 15:48:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:50,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683222886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:48:50,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:48:50,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 15:48:50,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984289235] [2023-08-24 15:48:50,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:48:50,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 15:48:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 15:48:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1431, Unknown=6, NotChecked=0, Total=1640 [2023-08-24 15:48:50,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:48:50,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 222 transitions, 3468 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:48:50,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:50,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:48:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:48:53,455 INFO L124 PetriNetUnfolderBase]: 1317/2376 cut-off events. [2023-08-24 15:48:53,455 INFO L125 PetriNetUnfolderBase]: For 33144/33144 co-relation queries the response was YES. [2023-08-24 15:48:53,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17522 conditions, 2376 events. 1317/2376 cut-off events. For 33144/33144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13736 event pairs, 305 based on Foata normal form. 2/2377 useless extension candidates. Maximal degree in co-relation 17459. Up to 996 conditions per place. [2023-08-24 15:48:53,473 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 272 selfloop transitions, 68 changer transitions 17/357 dead transitions. [2023-08-24 15:48:53,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 357 transitions, 5413 flow [2023-08-24 15:48:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 15:48:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 15:48:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1828 transitions. [2023-08-24 15:48:53,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321830985915493 [2023-08-24 15:48:53,476 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1828 transitions. [2023-08-24 15:48:53,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1828 transitions. [2023-08-24 15:48:53,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:48:53,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1828 transitions. [2023-08-24 15:48:53,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 91.4) internal successors, (1828), 20 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 15:48:53,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states 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 15:48:53,483 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states 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 15:48:53,483 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 3468 flow. Second operand 20 states and 1828 transitions. [2023-08-24 15:48:53,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 357 transitions, 5413 flow [2023-08-24 15:48:53,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 357 transitions, 4916 flow, removed 161 selfloop flow, removed 16 redundant places. [2023-08-24 15:48:53,605 INFO L231 Difference]: Finished difference. Result has 183 places, 246 transitions, 3626 flow [2023-08-24 15:48:53,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3626, PETRI_PLACES=183, PETRI_TRANSITIONS=246} [2023-08-24 15:48:53,606 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2023-08-24 15:48:53,606 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 246 transitions, 3626 flow [2023-08-24 15:48:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:48:53,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:48:53,607 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] [2023-08-24 15:48:53,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 15:48:53,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:53,807 INFO L420 AbstractCegarLoop]: === Iteration 33 === 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 15:48:53,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:48:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2074640676, now seen corresponding path program 3 times [2023-08-24 15:48:53,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:48:53,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890812287] [2023-08-24 15:48:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:48:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:48:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:48:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:54,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:48:54,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890812287] [2023-08-24 15:48:54,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890812287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:48:54,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507528578] [2023-08-24 15:48:54,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:48:54,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:48:54,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:48:54,813 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:48:54,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 15:48:55,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:48:55,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:48:55,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-24 15:48:55,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:48:55,235 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 15:48:55,271 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 15:48:55,301 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 15:48:55,329 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 15:48:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:55,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:48:56,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:56,368 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 134 treesize of output 98 [2023-08-24 15:48:56,420 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-24 15:48:56,421 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 3948 treesize of output 3699 [2023-08-24 15:48:56,442 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:48:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:48:56,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:48:56,457 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 322 [2023-08-24 15:48:56,505 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 15:48:56,505 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 416 treesize of output 332 [2023-08-24 15:48:56,546 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 15:48:56,547 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 249 treesize of output 217 [2023-08-24 15:48:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:48:57,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507528578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:48:57,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:48:57,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-24 15:48:57,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401387733] [2023-08-24 15:48:57,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:48:57,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 15:48:57,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:48:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 15:48:57,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1281, Unknown=10, NotChecked=0, Total=1482 [2023-08-24 15:48:57,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:48:57,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 246 transitions, 3626 flow. Second operand has 39 states, 39 states have (on average 85.61538461538461) internal successors, (3339), 39 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states 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 15:48:57,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:48:57,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:48:57,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:49:07,788 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 15:49:16,432 WARN L234 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:49:23,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:49:27,452 WARN L539 Checker$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 15:49:35,220 INFO L124 PetriNetUnfolderBase]: 2010/3459 cut-off events. [2023-08-24 15:49:35,220 INFO L125 PetriNetUnfolderBase]: For 47493/47493 co-relation queries the response was YES. [2023-08-24 15:49:35,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25220 conditions, 3459 events. 2010/3459 cut-off events. For 47493/47493 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20532 event pairs, 233 based on Foata normal form. 3/3461 useless extension candidates. Maximal degree in co-relation 25156. Up to 717 conditions per place. [2023-08-24 15:49:35,243 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 459 selfloop transitions, 346 changer transitions 39/844 dead transitions. [2023-08-24 15:49:35,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 844 transitions, 12341 flow [2023-08-24 15:49:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-24 15:49:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-24 15:49:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5973 transitions. [2023-08-24 15:49:35,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31866197183098594 [2023-08-24 15:49:35,250 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5973 transitions. [2023-08-24 15:49:35,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5973 transitions. [2023-08-24 15:49:35,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:49:35,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5973 transitions. [2023-08-24 15:49:35,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 90.5) internal successors, (5973), 66 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states 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 15:49:35,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 284.0) internal successors, (19028), 67 states have internal predecessors, (19028), 0 states have call successors, (0), 0 states 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 15:49:35,271 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 284.0) internal successors, (19028), 67 states have internal predecessors, (19028), 0 states have call successors, (0), 0 states 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 15:49:35,271 INFO L175 Difference]: Start difference. First operand has 183 places, 246 transitions, 3626 flow. Second operand 66 states and 5973 transitions. [2023-08-24 15:49:35,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 844 transitions, 12341 flow [2023-08-24 15:49:35,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 844 transitions, 12182 flow, removed 51 selfloop flow, removed 10 redundant places. [2023-08-24 15:49:35,468 INFO L231 Difference]: Finished difference. Result has 272 places, 500 transitions, 8990 flow [2023-08-24 15:49:35,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=8990, PETRI_PLACES=272, PETRI_TRANSITIONS=500} [2023-08-24 15:49:35,469 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 243 predicate places. [2023-08-24 15:49:35,469 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 500 transitions, 8990 flow [2023-08-24 15:49:35,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 85.61538461538461) internal successors, (3339), 39 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states 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 15:49:35,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:49:35,469 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] [2023-08-24 15:49:35,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 15:49:35,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-24 15:49:35,670 INFO L420 AbstractCegarLoop]: === Iteration 34 === 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 15:49:35,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:49:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1762148586, now seen corresponding path program 4 times [2023-08-24 15:49:35,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:49:35,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662299597] [2023-08-24 15:49:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:49:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:49:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:49:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:49:36,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:49:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662299597] [2023-08-24 15:49:36,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662299597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:49:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053240375] [2023-08-24 15:49:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:49:36,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:49:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:49:36,741 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:49:36,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 15:49:36,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:49:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:49:36,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-24 15:49:36,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:49:37,245 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 15:49:37,245 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 82 treesize of output 38 [2023-08-24 15:49:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:49:37,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:49:37,547 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:49:37,548 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 59 treesize of output 62 [2023-08-24 15:49:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:49:38,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053240375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:49:38,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:49:38,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-24 15:49:38,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299641863] [2023-08-24 15:49:38,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:49:38,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:49:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:49:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:49:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 15:49:38,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 15:49:38,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 500 transitions, 8990 flow. Second operand has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states 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 15:49:38,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:49:38,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 15:49:38,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:49:42,522 INFO L124 PetriNetUnfolderBase]: 2010/3459 cut-off events. [2023-08-24 15:49:42,523 INFO L125 PetriNetUnfolderBase]: For 58249/58249 co-relation queries the response was YES. [2023-08-24 15:49:42,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27881 conditions, 3459 events. 2010/3459 cut-off events. For 58249/58249 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20447 event pairs, 401 based on Foata normal form. 1/3460 useless extension candidates. Maximal degree in co-relation 27783. Up to 1816 conditions per place. [2023-08-24 15:49:42,549 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 485 selfloop transitions, 145 changer transitions 13/643 dead transitions. [2023-08-24 15:49:42,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 643 transitions, 11336 flow [2023-08-24 15:49:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 15:49:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 15:49:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2543 transitions. [2023-08-24 15:49:42,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358169014084507 [2023-08-24 15:49:42,551 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2543 transitions. [2023-08-24 15:49:42,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2543 transitions. [2023-08-24 15:49:42,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:49:42,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2543 transitions. [2023-08-24 15:49:42,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 101.72) internal successors, (2543), 25 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states 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 15:49:42,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 284.0) internal successors, (7384), 26 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states 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 15:49:42,558 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 284.0) internal successors, (7384), 26 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states 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 15:49:42,558 INFO L175 Difference]: Start difference. First operand has 272 places, 500 transitions, 8990 flow. Second operand 25 states and 2543 transitions. [2023-08-24 15:49:42,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 643 transitions, 11336 flow [2023-08-24 15:49:42,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 643 transitions, 10346 flow, removed 399 selfloop flow, removed 15 redundant places. [2023-08-24 15:49:42,831 INFO L231 Difference]: Finished difference. Result has 285 places, 522 transitions, 8916 flow [2023-08-24 15:49:42,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=8175, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8916, PETRI_PLACES=285, PETRI_TRANSITIONS=522} [2023-08-24 15:49:42,831 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 256 predicate places. [2023-08-24 15:49:42,832 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 522 transitions, 8916 flow [2023-08-24 15:49:42,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states 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 15:49:42,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:49:42,832 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] [2023-08-24 15:49:42,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 15:49:43,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 15:49:43,033 INFO L420 AbstractCegarLoop]: === Iteration 35 === 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 15:49:43,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:49:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1169573192, now seen corresponding path program 5 times [2023-08-24 15:49:43,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:49:43,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409108589] [2023-08-24 15:49:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:49:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:49:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:49:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:49:44,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:49:44,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409108589] [2023-08-24 15:49:44,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409108589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:49:44,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844449330] [2023-08-24 15:49:44,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:49:44,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:49:44,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:49:44,041 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:49:44,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 15:49:44,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:49:44,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:49:44,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 15:49:44,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:49:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:49:44,393 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 22 treesize of output 24 [2023-08-24 15:49:44,493 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 15:49:44,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:49:44,691 INFO L322 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-08-24 15:49:44,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 82 [2023-08-24 15:49:44,697 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:49:44,698 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 58 treesize of output 38 [2023-08-24 15:49:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:49:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844449330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:49:44,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:49:44,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 34 [2023-08-24 15:49:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244911339] [2023-08-24 15:49:44,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:49:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:49:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:49:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:49:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1104, Unknown=1, NotChecked=0, Total=1260 [2023-08-24 15:49:45,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:49:45,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 522 transitions, 8916 flow. Second operand has 36 states, 36 states have (on average 85.88888888888889) internal successors, (3092), 36 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states 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 15:49:45,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:49:45,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:49:45,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:50:12,571 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 15:50:17,921 INFO L124 PetriNetUnfolderBase]: 2134/3775 cut-off events. [2023-08-24 15:50:17,922 INFO L125 PetriNetUnfolderBase]: For 53709/53709 co-relation queries the response was YES. [2023-08-24 15:50:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29062 conditions, 3775 events. 2134/3775 cut-off events. For 53709/53709 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23595 event pairs, 131 based on Foata normal form. 10/3785 useless extension candidates. Maximal degree in co-relation 28961. Up to 603 conditions per place. [2023-08-24 15:50:17,954 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 374 selfloop transitions, 409 changer transitions 82/865 dead transitions. [2023-08-24 15:50:17,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 865 transitions, 12880 flow [2023-08-24 15:50:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-24 15:50:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-24 15:50:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6242 transitions. [2023-08-24 15:50:17,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3185343947744438 [2023-08-24 15:50:17,959 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6242 transitions. [2023-08-24 15:50:17,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6242 transitions. [2023-08-24 15:50:17,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:50:17,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6242 transitions. [2023-08-24 15:50:17,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 90.46376811594203) internal successors, (6242), 69 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states 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 15:50:17,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 284.0) internal successors, (19880), 70 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states 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 15:50:17,980 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 284.0) internal successors, (19880), 70 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states 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 15:50:17,980 INFO L175 Difference]: Start difference. First operand has 285 places, 522 transitions, 8916 flow. Second operand 69 states and 6242 transitions. [2023-08-24 15:50:17,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 865 transitions, 12880 flow [2023-08-24 15:50:18,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 865 transitions, 12726 flow, removed 30 selfloop flow, removed 11 redundant places. [2023-08-24 15:50:18,299 INFO L231 Difference]: Finished difference. Result has 354 places, 547 transitions, 10152 flow [2023-08-24 15:50:18,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=8774, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=10152, PETRI_PLACES=354, PETRI_TRANSITIONS=547} [2023-08-24 15:50:18,299 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 325 predicate places. [2023-08-24 15:50:18,300 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 547 transitions, 10152 flow [2023-08-24 15:50:18,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.88888888888889) internal successors, (3092), 36 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states 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 15:50:18,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:50:18,300 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] [2023-08-24 15:50:18,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 15:50:18,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 15:50:18,501 INFO L420 AbstractCegarLoop]: === Iteration 36 === 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 15:50:18,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:50:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1472493682, now seen corresponding path program 6 times [2023-08-24 15:50:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:50:18,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556282268] [2023-08-24 15:50:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:50:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:50:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:50:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:50:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:50:19,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556282268] [2023-08-24 15:50:19,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556282268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:50:19,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260622643] [2023-08-24 15:50:19,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:50:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:50:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:50:19,757 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:50:19,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 15:50:19,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:50:19,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:50:19,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 15:50:19,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:50:20,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:50:20,065 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 15:50:20,105 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 15:50:20,148 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 15:50:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:50:20,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:50:21,328 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:50:21,328 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 136 treesize of output 100 [2023-08-24 15:50:21,389 INFO L322 Elim1Store]: treesize reduction 5, result has 73.7 percent of original size [2023-08-24 15:50:21,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1004 treesize of output 949 [2023-08-24 15:50:21,423 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-24 15:50:21,424 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 458 treesize of output 364 [2023-08-24 15:50:21,434 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:50:21,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:50:21,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 266 treesize of output 250 [2023-08-24 15:50:21,477 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-24 15:50:21,478 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 265 treesize of output 223 [2023-08-24 15:50:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:50:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260622643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:50:21,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:50:21,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 15:50:21,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624836198] [2023-08-24 15:50:21,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:50:21,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 15:50:21,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:50:21,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 15:50:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1329, Unknown=7, NotChecked=0, Total=1560 [2023-08-24 15:50:21,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:50:21,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 547 transitions, 10152 flow. Second operand has 40 states, 40 states have (on average 85.625) internal successors, (3425), 40 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 15:50:21,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:50:21,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:50:21,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:50:24,301 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 15:50:28,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:50:31,183 WARN L539 Checker$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 15:50:33,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:50:41,247 WARN L539 Checker$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 15:50:55,506 INFO L124 PetriNetUnfolderBase]: 2227/3853 cut-off events. [2023-08-24 15:50:55,506 INFO L125 PetriNetUnfolderBase]: For 71464/71464 co-relation queries the response was YES. [2023-08-24 15:50:55,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32278 conditions, 3853 events. 2227/3853 cut-off events. For 71464/71464 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23615 event pairs, 272 based on Foata normal form. 5/3858 useless extension candidates. Maximal degree in co-relation 32167. Up to 757 conditions per place. [2023-08-24 15:50:55,543 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 504 selfloop transitions, 350 changer transitions 43/897 dead transitions. [2023-08-24 15:50:55,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 897 transitions, 16151 flow [2023-08-24 15:50:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 15:50:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 15:50:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4792 transitions. [2023-08-24 15:50:55,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31836300823810787 [2023-08-24 15:50:55,549 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4792 transitions. [2023-08-24 15:50:55,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4792 transitions. [2023-08-24 15:50:55,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:50:55,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4792 transitions. [2023-08-24 15:50:55,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 90.41509433962264) internal successors, (4792), 53 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states 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 15:50:55,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 284.0) internal successors, (15336), 54 states have internal predecessors, (15336), 0 states have call successors, (0), 0 states 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 15:50:55,566 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 284.0) internal successors, (15336), 54 states have internal predecessors, (15336), 0 states have call successors, (0), 0 states 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 15:50:55,566 INFO L175 Difference]: Start difference. First operand has 354 places, 547 transitions, 10152 flow. Second operand 53 states and 4792 transitions. [2023-08-24 15:50:55,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 897 transitions, 16151 flow [2023-08-24 15:50:55,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 897 transitions, 14748 flow, removed 209 selfloop flow, removed 34 redundant places. [2023-08-24 15:50:55,963 INFO L231 Difference]: Finished difference. Result has 375 places, 627 transitions, 11459 flow [2023-08-24 15:50:55,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=9134, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11459, PETRI_PLACES=375, PETRI_TRANSITIONS=627} [2023-08-24 15:50:55,964 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 346 predicate places. [2023-08-24 15:50:55,964 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 627 transitions, 11459 flow [2023-08-24 15:50:55,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.625) internal successors, (3425), 40 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 15:50:55,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:50:55,965 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] [2023-08-24 15:50:55,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 15:50:56,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:50:56,166 INFO L420 AbstractCegarLoop]: === Iteration 37 === 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 15:50:56,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:50:56,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1442339838, now seen corresponding path program 7 times [2023-08-24 15:50:56,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:50:56,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215349985] [2023-08-24 15:50:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:50:56,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:50:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:50:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:50:57,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:50:57,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215349985] [2023-08-24 15:50:57,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215349985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:50:57,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891451284] [2023-08-24 15:50:57,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:50:57,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:50:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:50:57,195 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:50:57,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 15:50:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:50:57,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 15:50:57,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:50:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:50:57,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:50:57,918 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:50:57,918 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 60 treesize of output 62 [2023-08-24 15:50:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:50:58,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891451284] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:50:58,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:50:58,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-24 15:50:58,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94543448] [2023-08-24 15:50:58,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:50:58,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:50:58,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:50:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:50:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 15:50:58,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 15:50:58,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 627 transitions, 11459 flow. Second operand has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states 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 15:50:58,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:50:58,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 15:50:58,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:51:03,940 INFO L124 PetriNetUnfolderBase]: 2626/4457 cut-off events. [2023-08-24 15:51:03,940 INFO L125 PetriNetUnfolderBase]: For 81729/81729 co-relation queries the response was YES. [2023-08-24 15:51:03,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36647 conditions, 4457 events. 2626/4457 cut-off events. For 81729/81729 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27242 event pairs, 280 based on Foata normal form. 4/4461 useless extension candidates. Maximal degree in co-relation 36530. Up to 891 conditions per place. [2023-08-24 15:51:03,984 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 407 selfloop transitions, 488 changer transitions 41/936 dead transitions. [2023-08-24 15:51:03,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 936 transitions, 17228 flow [2023-08-24 15:51:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 15:51:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 15:51:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3752 transitions. [2023-08-24 15:51:03,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570612866387514 [2023-08-24 15:51:03,987 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3752 transitions. [2023-08-24 15:51:03,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3752 transitions. [2023-08-24 15:51:03,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:51:03,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3752 transitions. [2023-08-24 15:51:03,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 101.4054054054054) internal successors, (3752), 37 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states 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 15:51:03,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 284.0) internal successors, (10792), 38 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states 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 15:51:03,997 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 284.0) internal successors, (10792), 38 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states 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 15:51:03,997 INFO L175 Difference]: Start difference. First operand has 375 places, 627 transitions, 11459 flow. Second operand 37 states and 3752 transitions. [2023-08-24 15:51:03,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 936 transitions, 17228 flow [2023-08-24 15:51:04,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 936 transitions, 16257 flow, removed 305 selfloop flow, removed 24 redundant places. [2023-08-24 15:51:04,664 INFO L231 Difference]: Finished difference. Result has 392 places, 777 transitions, 14796 flow [2023-08-24 15:51:04,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=10724, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14796, PETRI_PLACES=392, PETRI_TRANSITIONS=777} [2023-08-24 15:51:04,665 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 363 predicate places. [2023-08-24 15:51:04,666 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 777 transitions, 14796 flow [2023-08-24 15:51:04,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states 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 15:51:04,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:51:04,666 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] [2023-08-24 15:51:04,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-24 15:51:04,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 15:51:04,872 INFO L420 AbstractCegarLoop]: === Iteration 38 === 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 15:51:04,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:51:04,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1246022700, now seen corresponding path program 8 times [2023-08-24 15:51:04,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:51:04,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777032170] [2023-08-24 15:51:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:51:04,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:51:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:51:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:51:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777032170] [2023-08-24 15:51:05,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777032170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:51:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742120180] [2023-08-24 15:51:05,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:51:05,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:51:05,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:51:05,845 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:51:05,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 15:51:06,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:51:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:51:06,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 15:51:06,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:51:06,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:51:06,157 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 15:51:06,195 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 15:51:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:51:06,471 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 28 treesize of output 28 [2023-08-24 15:51:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:06,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:51:07,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:07,607 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 130 treesize of output 94 [2023-08-24 15:51:07,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:07,655 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 1092 treesize of output 1043 [2023-08-24 15:51:07,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:07,684 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 212 treesize of output 196 [2023-08-24 15:51:07,712 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:07,712 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 160 treesize of output 170 [2023-08-24 15:51:08,694 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:08,694 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 110 treesize of output 58 [2023-08-24 15:51:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:08,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742120180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:51:08,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:51:08,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 15:51:08,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556825091] [2023-08-24 15:51:08,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:51:08,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 15:51:08,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:51:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 15:51:08,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1413, Unknown=7, NotChecked=0, Total=1640 [2023-08-24 15:51:08,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:51:08,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 777 transitions, 14796 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:51:08,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:51:08,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:51:08,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:51:17,625 INFO L124 PetriNetUnfolderBase]: 2653/4559 cut-off events. [2023-08-24 15:51:17,626 INFO L125 PetriNetUnfolderBase]: For 92442/92442 co-relation queries the response was YES. [2023-08-24 15:51:17,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37922 conditions, 4559 events. 2653/4559 cut-off events. For 92442/92442 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28432 event pairs, 385 based on Foata normal form. 5/4564 useless extension candidates. Maximal degree in co-relation 37801. Up to 1758 conditions per place. [2023-08-24 15:51:17,674 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 625 selfloop transitions, 347 changer transitions 56/1028 dead transitions. [2023-08-24 15:51:17,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1028 transitions, 20034 flow [2023-08-24 15:51:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 15:51:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 15:51:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3952 transitions. [2023-08-24 15:51:17,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31626120358514725 [2023-08-24 15:51:17,679 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3952 transitions. [2023-08-24 15:51:17,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3952 transitions. [2023-08-24 15:51:17,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:51:17,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3952 transitions. [2023-08-24 15:51:17,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 89.81818181818181) internal successors, (3952), 44 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states 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 15:51:17,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 284.0) internal successors, (12780), 45 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states 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 15:51:17,804 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 284.0) internal successors, (12780), 45 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states 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 15:51:17,804 INFO L175 Difference]: Start difference. First operand has 392 places, 777 transitions, 14796 flow. Second operand 44 states and 3952 transitions. [2023-08-24 15:51:17,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1028 transitions, 20034 flow [2023-08-24 15:51:18,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1028 transitions, 19318 flow, removed 282 selfloop flow, removed 11 redundant places. [2023-08-24 15:51:18,394 INFO L231 Difference]: Finished difference. Result has 432 places, 814 transitions, 15788 flow [2023-08-24 15:51:18,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=14281, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=15788, PETRI_PLACES=432, PETRI_TRANSITIONS=814} [2023-08-24 15:51:18,395 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 403 predicate places. [2023-08-24 15:51:18,395 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 814 transitions, 15788 flow [2023-08-24 15:51:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:51:18,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:51:18,396 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] [2023-08-24 15:51:18,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 15:51:18,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 15:51:18,601 INFO L420 AbstractCegarLoop]: === Iteration 39 === 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 15:51:18,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:51:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 565757588, now seen corresponding path program 9 times [2023-08-24 15:51:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:51:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729788194] [2023-08-24 15:51:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:51:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:51:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:51:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:19,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:51:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729788194] [2023-08-24 15:51:19,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729788194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:51:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047084671] [2023-08-24 15:51:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:51:19,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:51:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:51:19,849 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:51:19,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 15:51:20,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:51:20,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:51:20,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 15:51:20,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:51:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:51:20,337 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 20 treesize of output 22 [2023-08-24 15:51:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:20,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:51:23,058 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:23,059 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 116 treesize of output 118 [2023-08-24 15:51:23,091 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:23,092 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 62 treesize of output 60 [2023-08-24 15:51:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:24,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047084671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:51:24,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:51:24,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-08-24 15:51:24,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843107102] [2023-08-24 15:51:24,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:51:24,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 15:51:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:51:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 15:51:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1313, Unknown=1, NotChecked=0, Total=1482 [2023-08-24 15:51:24,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:51:24,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 814 transitions, 15788 flow. Second operand has 39 states, 39 states have (on average 85.76923076923077) internal successors, (3345), 39 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states 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 15:51:24,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:51:24,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:51:24,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:51:36,725 WARN L234 SmtUtils]: Spent 8.53s on a formula simplification. DAG size of input: 119 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:51:40,833 INFO L124 PetriNetUnfolderBase]: 2656/4563 cut-off events. [2023-08-24 15:51:40,833 INFO L125 PetriNetUnfolderBase]: For 95933/95933 co-relation queries the response was YES. [2023-08-24 15:51:40,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38029 conditions, 4563 events. 2656/4563 cut-off events. For 95933/95933 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28240 event pairs, 415 based on Foata normal form. 3/4566 useless extension candidates. Maximal degree in co-relation 37899. Up to 1080 conditions per place. [2023-08-24 15:51:40,879 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 530 selfloop transitions, 441 changer transitions 48/1019 dead transitions. [2023-08-24 15:51:40,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1019 transitions, 19351 flow [2023-08-24 15:51:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 15:51:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 15:51:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3816 transitions. [2023-08-24 15:51:40,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3199195171026157 [2023-08-24 15:51:40,884 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3816 transitions. [2023-08-24 15:51:40,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3816 transitions. [2023-08-24 15:51:40,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:51:40,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3816 transitions. [2023-08-24 15:51:40,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 90.85714285714286) internal successors, (3816), 42 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states 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 15:51:40,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 284.0) internal successors, (12212), 43 states have internal predecessors, (12212), 0 states have call successors, (0), 0 states 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 15:51:40,894 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 284.0) internal successors, (12212), 43 states have internal predecessors, (12212), 0 states have call successors, (0), 0 states 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 15:51:40,895 INFO L175 Difference]: Start difference. First operand has 432 places, 814 transitions, 15788 flow. Second operand 42 states and 3816 transitions. [2023-08-24 15:51:40,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1019 transitions, 19351 flow [2023-08-24 15:51:41,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1019 transitions, 18983 flow, removed 67 selfloop flow, removed 27 redundant places. [2023-08-24 15:51:41,518 INFO L231 Difference]: Finished difference. Result has 455 places, 832 transitions, 17058 flow [2023-08-24 15:51:41,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=15445, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=17058, PETRI_PLACES=455, PETRI_TRANSITIONS=832} [2023-08-24 15:51:41,522 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 426 predicate places. [2023-08-24 15:51:41,522 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 832 transitions, 17058 flow [2023-08-24 15:51:41,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 85.76923076923077) internal successors, (3345), 39 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states 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 15:51:41,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:51:41,523 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] [2023-08-24 15:51:41,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 15:51:41,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 15:51:41,728 INFO L420 AbstractCegarLoop]: === Iteration 40 === 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 15:51:41,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:51:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1764700758, now seen corresponding path program 10 times [2023-08-24 15:51:41,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:51:41,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462541921] [2023-08-24 15:51:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:51:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:51:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:51:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:42,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:51:42,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462541921] [2023-08-24 15:51:42,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462541921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:51:42,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565481539] [2023-08-24 15:51:42,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:51:42,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:51:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:51:42,693 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:51:42,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 15:51:42,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:51:42,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:51:42,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 15:51:42,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:51:42,921 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 15:51:42,965 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 15:51:43,001 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 15:51:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:51:43,223 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 22 treesize of output 24 [2023-08-24 15:51:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:51:43,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:51:44,000 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse19 (* c_~end~0 4))) (let ((.cse20 (* c_~start~0 4)) (.cse17 (mod (select (select |c_#memory_int| c_~queue~0.base) (+ .cse19 c_~queue~0.offset)) 4294967296)) (.cse0 (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296))) (let ((.cse4 (+ .cse17 .cse0)) (.cse3 (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296)) (.cse6 (+ .cse20 c_~queue~0.offset)) (.cse7 (+ .cse20 c_~queue~0.offset 4)) (.cse8 (+ .cse19 c_~queue~0.offset 4))) (and (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse1 (mod (select .cse5 .cse8) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse2 (* v_y_338 4294967296))) (or (<= .cse0 (+ .cse1 .cse2)) (not (= (+ .cse1 .cse3 .cse2) .cse4))))) (= (mod (select .cse5 .cse6) 4294967296) (mod (select .cse5 .cse7) 4294967296)) (<= .cse0 .cse1))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse10 (mod (select .cse9 .cse8) 4294967296))) (or (= (mod (select .cse9 .cse6) 4294967296) (mod (select .cse9 .cse7) 4294967296)) (forall ((v_y_338 Int)) (let ((.cse11 (* v_y_338 4294967296))) (or (not (= .cse4 (+ .cse10 .cse3 .cse11 4294967296))) (< (+ .cse10 .cse11 4294967296) .cse0)))) (<= .cse0 .cse10))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse13 (mod (select .cse12 .cse8) 4294967296))) (or (= (mod (select .cse12 .cse6) 4294967296) (mod (select .cse12 .cse7) 4294967296)) (< .cse13 .cse0) (forall ((v_y_338 Int)) (let ((.cse14 (* v_y_338 4294967296))) (or (< (+ .cse13 .cse14) .cse0) (not (= (+ .cse13 .cse3 .cse14) .cse4))))))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse15 (mod (select .cse18 .cse8) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse16 (* v_y_338 4294967296))) (or (<= (+ .cse0 4294967296) (+ .cse15 .cse16)) (not (= (+ .cse15 .cse3 .cse16) (+ .cse17 .cse0 4294967296)))))) (= (mod (select .cse18 .cse6) 4294967296) (mod (select .cse18 .cse7) 4294967296)) (< .cse15 .cse0))))))))) (<= c_~n~0 (+ c_~start~0 1)) (< c_~start~0 0)) is different from false [2023-08-24 15:51:44,616 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:44,616 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 135 treesize of output 99 [2023-08-24 15:51:44,675 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:44,676 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 2756 treesize of output 2558 [2023-08-24 15:51:44,725 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:44,725 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 468 treesize of output 406 [2023-08-24 15:51:44,780 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:44,781 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 388 treesize of output 360 [2023-08-24 15:51:44,849 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:51:44,850 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 261 treesize of output 265 [2023-08-24 15:52:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 15:52:07,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565481539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:52:07,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:52:07,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 15:52:07,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831515767] [2023-08-24 15:52:07,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:52:07,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 15:52:07,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:52:07,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 15:52:07,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1406, Unknown=15, NotChecked=76, Total=1640 [2023-08-24 15:52:07,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:52:07,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 832 transitions, 17058 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:52:07,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:52:07,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:52:07,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:52:12,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:52:25,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:52:30,556 WARN L539 Checker$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 15:52:32,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:52:34,673 INFO L124 PetriNetUnfolderBase]: 2697/4649 cut-off events. [2023-08-24 15:52:34,674 INFO L125 PetriNetUnfolderBase]: For 110749/110749 co-relation queries the response was YES. [2023-08-24 15:52:34,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40370 conditions, 4649 events. 2697/4649 cut-off events. For 110749/110749 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29178 event pairs, 399 based on Foata normal form. 3/4652 useless extension candidates. Maximal degree in co-relation 40230. Up to 1829 conditions per place. [2023-08-24 15:52:34,724 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 692 selfloop transitions, 326 changer transitions 31/1049 dead transitions. [2023-08-24 15:52:34,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1049 transitions, 21749 flow [2023-08-24 15:52:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 15:52:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 15:52:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3686 transitions. [2023-08-24 15:52:34,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31655788388869804 [2023-08-24 15:52:34,727 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3686 transitions. [2023-08-24 15:52:34,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3686 transitions. [2023-08-24 15:52:34,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:52:34,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3686 transitions. [2023-08-24 15:52:34,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 89.90243902439025) internal successors, (3686), 41 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states 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 15:52:34,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 284.0) internal successors, (11928), 42 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states 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 15:52:34,735 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 284.0) internal successors, (11928), 42 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states 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 15:52:34,735 INFO L175 Difference]: Start difference. First operand has 455 places, 832 transitions, 17058 flow. Second operand 41 states and 3686 transitions. [2023-08-24 15:52:34,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1049 transitions, 21749 flow [2023-08-24 15:52:35,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1049 transitions, 21436 flow, removed 55 selfloop flow, removed 25 redundant places. [2023-08-24 15:52:35,410 INFO L231 Difference]: Finished difference. Result has 474 places, 843 transitions, 17741 flow [2023-08-24 15:52:35,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=16775, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17741, PETRI_PLACES=474, PETRI_TRANSITIONS=843} [2023-08-24 15:52:35,412 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 445 predicate places. [2023-08-24 15:52:35,412 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 843 transitions, 17741 flow [2023-08-24 15:52:35,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:52:35,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:52:35,412 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] [2023-08-24 15:52:35,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 15:52:35,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 15:52:35,618 INFO L420 AbstractCegarLoop]: === Iteration 41 === 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 15:52:35,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:52:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2040239090, now seen corresponding path program 11 times [2023-08-24 15:52:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:52:35,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601265643] [2023-08-24 15:52:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:52:35,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:52:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:52:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:52:36,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:52:36,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601265643] [2023-08-24 15:52:36,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601265643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:52:36,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72374283] [2023-08-24 15:52:36,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:52:36,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:52:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:52:36,850 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:52:36,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 15:52:36,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:52:36,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:52:37,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 15:52:37,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:52:37,264 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 15:52:37,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:52:37,388 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:52:37,388 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 58 treesize of output 60 [2023-08-24 15:52:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:52:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72374283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:52:37,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:52:37,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 28 [2023-08-24 15:52:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070735725] [2023-08-24 15:52:37,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:52:37,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:52:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:52:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:52:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:52:37,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:52:37,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 843 transitions, 17741 flow. Second operand has 30 states, 30 states have (on average 86.06666666666666) internal successors, (2582), 30 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states 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 15:52:37,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:52:37,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:52:37,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:52:43,721 INFO L124 PetriNetUnfolderBase]: 3554/5889 cut-off events. [2023-08-24 15:52:43,721 INFO L125 PetriNetUnfolderBase]: For 147253/147253 co-relation queries the response was YES. [2023-08-24 15:52:43,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54086 conditions, 5889 events. 3554/5889 cut-off events. For 147253/147253 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36608 event pairs, 269 based on Foata normal form. 5/5894 useless extension candidates. Maximal degree in co-relation 53944. Up to 1162 conditions per place. [2023-08-24 15:52:43,794 INFO L140 encePairwiseOnDemand]: 272/284 looper letters, 552 selfloop transitions, 678 changer transitions 44/1274 dead transitions. [2023-08-24 15:52:43,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1274 transitions, 27613 flow [2023-08-24 15:52:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 15:52:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 15:52:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3470 transitions. [2023-08-24 15:52:43,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3215344699777613 [2023-08-24 15:52:43,797 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3470 transitions. [2023-08-24 15:52:43,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3470 transitions. [2023-08-24 15:52:43,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:52:43,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3470 transitions. [2023-08-24 15:52:43,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 91.3157894736842) internal successors, (3470), 38 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states 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 15:52:43,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states 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 15:52:43,804 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states 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 15:52:43,804 INFO L175 Difference]: Start difference. First operand has 474 places, 843 transitions, 17741 flow. Second operand 38 states and 3470 transitions. [2023-08-24 15:52:43,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1274 transitions, 27613 flow [2023-08-24 15:52:44,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1274 transitions, 26937 flow, removed 20 selfloop flow, removed 29 redundant places. [2023-08-24 15:52:44,967 INFO L231 Difference]: Finished difference. Result has 501 places, 1076 transitions, 25091 flow [2023-08-24 15:52:44,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=17260, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=25091, PETRI_PLACES=501, PETRI_TRANSITIONS=1076} [2023-08-24 15:52:44,968 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 472 predicate places. [2023-08-24 15:52:44,968 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 1076 transitions, 25091 flow [2023-08-24 15:52:44,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.06666666666666) internal successors, (2582), 30 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states 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 15:52:44,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:52:44,969 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] [2023-08-24 15:52:44,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 15:52:45,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-24 15:52:45,169 INFO L420 AbstractCegarLoop]: === Iteration 42 === 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 15:52:45,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:52:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1388633142, now seen corresponding path program 12 times [2023-08-24 15:52:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:52:45,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815234394] [2023-08-24 15:52:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:52:45,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:52:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:52:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:52:46,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:52:46,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815234394] [2023-08-24 15:52:46,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815234394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:52:46,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648663560] [2023-08-24 15:52:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:52:46,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:52:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:52:46,858 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:52:46,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 15:52:47,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:52:47,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:52:47,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 15:52:47,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:52:47,112 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 15:52:47,166 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 15:52:47,212 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 15:52:47,250 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 15:52:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:52:47,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:52:49,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:52:49,473 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 15:52:49,532 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-24 15:52:49,533 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 2748 treesize of output 2567 [2023-08-24 15:52:49,556 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:52:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:52:49,576 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:52:49,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 400 [2023-08-24 15:52:49,616 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 15:52:49,616 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 582 treesize of output 446 [2023-08-24 15:52:49,663 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 15:52:49,663 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 327 treesize of output 269 [2023-08-24 15:52:50,734 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 15:52:50,734 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 203 treesize of output 1 [2023-08-24 15:52:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:52:50,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648663560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:52:50,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:52:50,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 15:52:50,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112074349] [2023-08-24 15:52:50,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:52:50,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 15:52:50,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:52:50,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 15:52:50,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1342, Unknown=13, NotChecked=0, Total=1560 [2023-08-24 15:52:50,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:52:50,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 1076 transitions, 25091 flow. Second operand has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 15:52:50,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:52:50,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:52:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:03,879 WARN L234 SmtUtils]: Spent 12.59s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:53:04,195 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse16 (+ c_~start~0 1)) (.cse17 (+ c_~end~0 1))) (let ((.cse0 (< .cse17 0)) (.cse1 (<= c_~n~0 .cse17)) (.cse2 (<= c_~n~0 .cse16)) (.cse3 (<= .cse16 0))) (and (or .cse0 (< (+ |c_ULTIMATE.start_create_fresh_uint_array_~i~2#1| 2) |c_ULTIMATE.start_create_fresh_uint_array_~size#1|) .cse1 .cse2 .cse3 (= c_~start~0 c_~end~0)) (or .cse0 .cse1 .cse2 .cse3 (let ((.cse14 (* c_~start~0 4)) (.cse15 (* c_~end~0 4))) (let ((.cse9 (+ .cse15 c_~queue~0.offset)) (.cse10 (+ .cse15 c_~queue~0.offset 4)) (.cse8 (+ .cse14 c_~queue~0.offset 4)) (.cse7 (+ .cse14 c_~queue~0.offset))) (and (forall ((v_ArrVal_1908 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1908) c_~queue~0.base))) (or (let ((.cse5 (select .cse6 .cse8)) (.cse4 (select .cse6 .cse7))) (< (+ .cse4 (* (div .cse5 4294967296) 4294967296)) (+ .cse5 (* (div .cse4 4294967296) 4294967296) 1))) (not (= (mod (+ (select .cse6 .cse9) (* 4294967295 (select .cse6 .cse10))) 4294967296) 0))))) (forall ((v_ArrVal_1908 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1908) c_~queue~0.base))) (or (not (= (mod (+ (select .cse11 .cse9) (* 4294967295 (select .cse11 .cse10))) 4294967296) 0)) (let ((.cse13 (select .cse11 .cse7)) (.cse12 (select .cse11 .cse8))) (<= (+ .cse12 (* (div .cse13 4294967296) 4294967296)) (+ .cse13 (* (div .cse12 4294967296) 4294967296)))))))))))))) is different from false [2023-08-24 15:53:06,216 WARN L539 Checker$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 15:53:07,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:53:09,730 WARN L539 Checker$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 15:53:20,586 WARN L234 SmtUtils]: Spent 10.56s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:53:23,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:53:39,472 WARN L234 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:53:56,388 WARN L539 Checker$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 15:54:04,185 INFO L124 PetriNetUnfolderBase]: 4216/6886 cut-off events. [2023-08-24 15:54:04,186 INFO L125 PetriNetUnfolderBase]: For 209795/209795 co-relation queries the response was YES. [2023-08-24 15:54:04,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68605 conditions, 6886 events. 4216/6886 cut-off events. For 209795/209795 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 43271 event pairs, 545 based on Foata normal form. 3/6889 useless extension candidates. Maximal degree in co-relation 68442. Up to 2066 conditions per place. [2023-08-24 15:54:04,273 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 865 selfloop transitions, 626 changer transitions 28/1519 dead transitions. [2023-08-24 15:54:04,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1519 transitions, 35670 flow [2023-08-24 15:54:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 15:54:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 15:54:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3653 transitions. [2023-08-24 15:54:04,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3215669014084507 [2023-08-24 15:54:04,276 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3653 transitions. [2023-08-24 15:54:04,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3653 transitions. [2023-08-24 15:54:04,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:54:04,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3653 transitions. [2023-08-24 15:54:04,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 91.325) internal successors, (3653), 40 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states 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 15:54:04,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 284.0) internal successors, (11644), 41 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states 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 15:54:04,283 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 284.0) internal successors, (11644), 41 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states 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 15:54:04,283 INFO L175 Difference]: Start difference. First operand has 501 places, 1076 transitions, 25091 flow. Second operand 40 states and 3653 transitions. [2023-08-24 15:54:04,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1519 transitions, 35670 flow [2023-08-24 15:54:06,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1519 transitions, 33801 flow, removed 366 selfloop flow, removed 17 redundant places. [2023-08-24 15:54:06,475 INFO L231 Difference]: Finished difference. Result has 538 places, 1251 transitions, 30601 flow [2023-08-24 15:54:06,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=23750, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=30601, PETRI_PLACES=538, PETRI_TRANSITIONS=1251} [2023-08-24 15:54:06,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 509 predicate places. [2023-08-24 15:54:06,476 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1251 transitions, 30601 flow [2023-08-24 15:54:06,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 15:54:06,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:54:06,476 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] [2023-08-24 15:54:06,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 15:54:06,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:54:06,677 INFO L420 AbstractCegarLoop]: === Iteration 43 === 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 15:54:06,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:54:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash -747803392, now seen corresponding path program 13 times [2023-08-24 15:54:06,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:54:06,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707012513] [2023-08-24 15:54:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:54:06,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:54:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:54:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:54:07,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:54:07,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707012513] [2023-08-24 15:54:07,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707012513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:54:07,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652782724] [2023-08-24 15:54:07,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:54:07,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:54:07,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:54:07,702 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:54:07,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 15:54:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:54:07,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 15:54:07,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:54:08,127 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 15:54:08,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:54:08,354 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:54:08,355 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 58 treesize of output 60 [2023-08-24 15:54:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:54:09,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652782724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:54:09,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:54:09,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-24 15:54:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749843585] [2023-08-24 15:54:09,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:54:09,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:54:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:54:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:54:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2023-08-24 15:54:09,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 15:54:09,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1251 transitions, 30601 flow. Second operand has 29 states, 29 states have (on average 96.17241379310344) internal successors, (2789), 29 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states 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 15:54:09,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:54:09,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 15:54:09,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:54:15,894 INFO L124 PetriNetUnfolderBase]: 4410/7532 cut-off events. [2023-08-24 15:54:15,895 INFO L125 PetriNetUnfolderBase]: For 230316/230316 co-relation queries the response was YES. [2023-08-24 15:54:15,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74086 conditions, 7532 events. 4410/7532 cut-off events. For 230316/230316 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 51103 event pairs, 451 based on Foata normal form. 3/7535 useless extension candidates. Maximal degree in co-relation 73908. Up to 1389 conditions per place. [2023-08-24 15:54:16,182 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 714 selfloop transitions, 808 changer transitions 27/1549 dead transitions. [2023-08-24 15:54:16,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 1549 transitions, 36902 flow [2023-08-24 15:54:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 15:54:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 15:54:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3667 transitions. [2023-08-24 15:54:16,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586658841940532 [2023-08-24 15:54:16,186 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3667 transitions. [2023-08-24 15:54:16,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3667 transitions. [2023-08-24 15:54:16,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:54:16,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3667 transitions. [2023-08-24 15:54:16,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 101.86111111111111) internal successors, (3667), 36 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states 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 15:54:16,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 284.0) internal successors, (10508), 37 states have internal predecessors, (10508), 0 states have call successors, (0), 0 states 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 15:54:16,197 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 284.0) internal successors, (10508), 37 states have internal predecessors, (10508), 0 states have call successors, (0), 0 states 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 15:54:16,197 INFO L175 Difference]: Start difference. First operand has 538 places, 1251 transitions, 30601 flow. Second operand 36 states and 3667 transitions. [2023-08-24 15:54:16,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 1549 transitions, 36902 flow [2023-08-24 15:54:18,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 1549 transitions, 36299 flow, removed 276 selfloop flow, removed 11 redundant places. [2023-08-24 15:54:18,422 INFO L231 Difference]: Finished difference. Result has 567 places, 1306 transitions, 33133 flow [2023-08-24 15:54:18,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=30098, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=757, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=33133, PETRI_PLACES=567, PETRI_TRANSITIONS=1306} [2023-08-24 15:54:18,424 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 538 predicate places. [2023-08-24 15:54:18,424 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1306 transitions, 33133 flow [2023-08-24 15:54:18,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 96.17241379310344) internal successors, (2789), 29 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states 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 15:54:18,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:54:18,424 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] [2023-08-24 15:54:18,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 15:54:18,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-24 15:54:18,625 INFO L420 AbstractCegarLoop]: === Iteration 44 === 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 15:54:18,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:54:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2019263082, now seen corresponding path program 14 times [2023-08-24 15:54:18,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:54:18,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871580834] [2023-08-24 15:54:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:54:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:54:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:54:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:54:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:54:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871580834] [2023-08-24 15:54:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871580834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:54:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539918879] [2023-08-24 15:54:21,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:54:21,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:54:21,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:54:21,363 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:54:21,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 15:54:21,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:54:21,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:54:21,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 15:54:21,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:54:21,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:54:21,696 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 15:54:21,749 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 15:54:21,796 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 15:54:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:54:22,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:54:23,331 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:54:23,331 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 134 treesize of output 98 [2023-08-24 15:54:23,405 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-24 15:54:23,405 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 1964 treesize of output 1851 [2023-08-24 15:54:23,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:54:23,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:54:23,450 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:54:23,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 322 [2023-08-24 15:54:23,507 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 15:54:23,508 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 416 treesize of output 332 [2023-08-24 15:54:23,565 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 15:54:23,565 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 249 treesize of output 217 [2023-08-24 15:54:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:54:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539918879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:54:24,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:54:24,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 15:54:24,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686484764] [2023-08-24 15:54:24,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:54:24,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 15:54:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:54:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 15:54:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1375, Unknown=6, NotChecked=0, Total=1640 [2023-08-24 15:54:24,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:54:24,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1306 transitions, 33133 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:54:24,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:54:24,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:54:24,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:54:33,344 WARN L234 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:54:42,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:54:54,749 WARN L539 Checker$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 15:55:00,607 INFO L124 PetriNetUnfolderBase]: 4782/8088 cut-off events. [2023-08-24 15:55:00,607 INFO L125 PetriNetUnfolderBase]: For 278027/278027 co-relation queries the response was YES. [2023-08-24 15:55:00,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81997 conditions, 8088 events. 4782/8088 cut-off events. For 278027/278027 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55005 event pairs, 444 based on Foata normal form. 2/8090 useless extension candidates. Maximal degree in co-relation 81814. Up to 1596 conditions per place. [2023-08-24 15:55:00,709 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 894 selfloop transitions, 799 changer transitions 27/1720 dead transitions. [2023-08-24 15:55:00,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 1720 transitions, 43078 flow [2023-08-24 15:55:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 15:55:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 15:55:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3896 transitions. [2023-08-24 15:55:00,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3190304618408123 [2023-08-24 15:55:00,713 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3896 transitions. [2023-08-24 15:55:00,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3896 transitions. [2023-08-24 15:55:00,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:55:00,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3896 transitions. [2023-08-24 15:55:00,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 90.6046511627907) internal successors, (3896), 43 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states 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 15:55:00,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 284.0) internal successors, (12496), 44 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states 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 15:55:00,721 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 284.0) internal successors, (12496), 44 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states 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 15:55:00,721 INFO L175 Difference]: Start difference. First operand has 567 places, 1306 transitions, 33133 flow. Second operand 43 states and 3896 transitions. [2023-08-24 15:55:00,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 1720 transitions, 43078 flow [2023-08-24 15:55:03,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1720 transitions, 41752 flow, removed 84 selfloop flow, removed 13 redundant places. [2023-08-24 15:55:03,363 INFO L231 Difference]: Finished difference. Result has 613 places, 1425 transitions, 37511 flow [2023-08-24 15:55:03,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=32079, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=37511, PETRI_PLACES=613, PETRI_TRANSITIONS=1425} [2023-08-24 15:55:03,364 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 584 predicate places. [2023-08-24 15:55:03,364 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1425 transitions, 37511 flow [2023-08-24 15:55:03,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:55:03,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:55:03,365 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] [2023-08-24 15:55:03,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 15:55:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:55:03,571 INFO L420 AbstractCegarLoop]: === Iteration 45 === 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 15:55:03,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:55:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash -405696348, now seen corresponding path program 15 times [2023-08-24 15:55:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:55:03,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314507802] [2023-08-24 15:55:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:55:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:55:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:55:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:55:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:55:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314507802] [2023-08-24 15:55:04,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314507802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:55:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407886434] [2023-08-24 15:55:04,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:55:04,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:55:04,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:55:04,840 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:55:04,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 15:55:04,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:55:04,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:55:04,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 15:55:04,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:55:05,086 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 15:55:05,134 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 15:55:05,176 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 15:55:05,212 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 15:55:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:55:05,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:55:08,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:55:08,766 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 134 treesize of output 98 [2023-08-24 15:55:08,869 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-24 15:55:08,869 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 972 treesize of output 927 [2023-08-24 15:55:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:55:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:55:08,940 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:55:08,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 296 [2023-08-24 15:55:08,954 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:55:08,957 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:55:08,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:55:08,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 270 [2023-08-24 15:55:09,105 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 15:55:09,105 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 301 treesize of output 217 [2023-08-24 15:55:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:55:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407886434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:55:10,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:55:10,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-24 15:55:10,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133287894] [2023-08-24 15:55:10,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:55:10,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 15:55:10,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:55:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 15:55:10,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1350, Unknown=4, NotChecked=0, Total=1560 [2023-08-24 15:55:10,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:55:10,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1425 transitions, 37511 flow. Second operand has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 15:55:10,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:55:10,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:55:10,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:55:13,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:55:18,698 WARN L539 Checker$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 15:55:20,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:55:23,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 15:55:33,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:56:02,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:56:09,331 INFO L124 PetriNetUnfolderBase]: 4959/8387 cut-off events. [2023-08-24 15:56:09,331 INFO L125 PetriNetUnfolderBase]: For 305846/305846 co-relation queries the response was YES. [2023-08-24 15:56:09,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88689 conditions, 8387 events. 4959/8387 cut-off events. For 305846/305846 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 57450 event pairs, 492 based on Foata normal form. 3/8390 useless extension candidates. Maximal degree in co-relation 88488. Up to 1612 conditions per place. [2023-08-24 15:56:09,441 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 894 selfloop transitions, 901 changer transitions 34/1829 dead transitions. [2023-08-24 15:56:09,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 1829 transitions, 46282 flow [2023-08-24 15:56:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-24 15:56:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-24 15:56:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5515 transitions. [2023-08-24 15:56:09,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31834449318864005 [2023-08-24 15:56:09,445 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5515 transitions. [2023-08-24 15:56:09,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5515 transitions. [2023-08-24 15:56:09,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:56:09,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5515 transitions. [2023-08-24 15:56:09,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 90.40983606557377) internal successors, (5515), 61 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states 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 15:56:09,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 284.0) internal successors, (17608), 62 states have internal predecessors, (17608), 0 states have call successors, (0), 0 states 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 15:56:09,457 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 284.0) internal successors, (17608), 62 states have internal predecessors, (17608), 0 states have call successors, (0), 0 states 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 15:56:09,457 INFO L175 Difference]: Start difference. First operand has 613 places, 1425 transitions, 37511 flow. Second operand 61 states and 5515 transitions. [2023-08-24 15:56:09,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 1829 transitions, 46282 flow [2023-08-24 15:56:12,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 1829 transitions, 45605 flow, removed 66 selfloop flow, removed 18 redundant places. [2023-08-24 15:56:12,608 INFO L231 Difference]: Finished difference. Result has 664 places, 1476 transitions, 40256 flow [2023-08-24 15:56:12,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=36873, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=851, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=40256, PETRI_PLACES=664, PETRI_TRANSITIONS=1476} [2023-08-24 15:56:12,610 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 635 predicate places. [2023-08-24 15:56:12,610 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1476 transitions, 40256 flow [2023-08-24 15:56:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 15:56:12,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:56:12,611 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] [2023-08-24 15:56:12,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 15:56:12,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-24 15:56:12,816 INFO L420 AbstractCegarLoop]: === Iteration 46 === 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 15:56:12,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:56:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 87366356, now seen corresponding path program 16 times [2023-08-24 15:56:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:56:12,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903775628] [2023-08-24 15:56:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:56:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:56:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:56:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:13,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:56:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903775628] [2023-08-24 15:56:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903775628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:56:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185007040] [2023-08-24 15:56:13,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:56:13,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:56:13,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:56:13,764 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:56:13,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 15:56:13,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:56:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:56:13,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 15:56:13,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:56:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:14,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:56:14,435 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:56:14,436 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 58 treesize of output 60 [2023-08-24 15:56:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:14,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185007040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:56:14,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:56:14,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 31 [2023-08-24 15:56:14,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672105030] [2023-08-24 15:56:14,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:56:14,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 15:56:14,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:56:14,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 15:56:14,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 15:56:14,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 15:56:14,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1476 transitions, 40256 flow. Second operand has 33 states, 33 states have (on average 95.9090909090909) internal successors, (3165), 33 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states 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 15:56:14,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:56:14,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 15:56:14,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:56:21,396 INFO L124 PetriNetUnfolderBase]: 5185/8721 cut-off events. [2023-08-24 15:56:21,396 INFO L125 PetriNetUnfolderBase]: For 333413/333413 co-relation queries the response was YES. [2023-08-24 15:56:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95244 conditions, 8721 events. 5185/8721 cut-off events. For 333413/333413 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 59137 event pairs, 632 based on Foata normal form. 4/8725 useless extension candidates. Maximal degree in co-relation 95035. Up to 1747 conditions per place. [2023-08-24 15:56:21,511 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 767 selfloop transitions, 914 changer transitions 29/1710 dead transitions. [2023-08-24 15:56:21,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1710 transitions, 47397 flow [2023-08-24 15:56:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 15:56:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 15:56:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3048 transitions. [2023-08-24 15:56:21,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35774647887323946 [2023-08-24 15:56:21,513 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3048 transitions. [2023-08-24 15:56:21,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3048 transitions. [2023-08-24 15:56:21,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:56:21,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3048 transitions. [2023-08-24 15:56:21,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 101.6) internal successors, (3048), 30 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states 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 15:56:21,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 284.0) internal successors, (8804), 31 states have internal predecessors, (8804), 0 states have call successors, (0), 0 states 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 15:56:21,519 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 284.0) internal successors, (8804), 31 states have internal predecessors, (8804), 0 states have call successors, (0), 0 states 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 15:56:21,519 INFO L175 Difference]: Start difference. First operand has 664 places, 1476 transitions, 40256 flow. Second operand 30 states and 3048 transitions. [2023-08-24 15:56:21,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1710 transitions, 47397 flow [2023-08-24 15:56:24,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 1710 transitions, 46218 flow, removed 110 selfloop flow, removed 30 redundant places. [2023-08-24 15:56:24,853 INFO L231 Difference]: Finished difference. Result has 670 places, 1578 transitions, 44284 flow [2023-08-24 15:56:24,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=39179, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=44284, PETRI_PLACES=670, PETRI_TRANSITIONS=1578} [2023-08-24 15:56:24,854 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 641 predicate places. [2023-08-24 15:56:24,854 INFO L495 AbstractCegarLoop]: Abstraction has has 670 places, 1578 transitions, 44284 flow [2023-08-24 15:56:24,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 95.9090909090909) internal successors, (3165), 33 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states 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 15:56:24,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:56:24,855 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] [2023-08-24 15:56:24,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 15:56:25,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-24 15:56:25,056 INFO L420 AbstractCegarLoop]: === Iteration 47 === 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 15:56:25,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:56:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1923862944, now seen corresponding path program 17 times [2023-08-24 15:56:25,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:56:25,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027866489] [2023-08-24 15:56:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:56:25,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:56:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:56:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:26,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:56:26,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027866489] [2023-08-24 15:56:26,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027866489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:56:26,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874493288] [2023-08-24 15:56:26,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:56:26,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:56:26,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:56:26,293 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:56:26,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 15:56:26,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:56:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:56:26,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 15:56:26,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:56:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:26,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:56:27,324 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:56:27,325 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 60 treesize of output 62 [2023-08-24 15:56:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:28,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874493288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:56:28,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:56:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-24 15:56:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797719703] [2023-08-24 15:56:28,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:56:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 15:56:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:56:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 15:56:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 15:56:28,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:56:28,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 1578 transitions, 44284 flow. Second operand has 37 states, 37 states have (on average 85.86486486486487) internal successors, (3177), 37 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states 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 15:56:28,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:56:28,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:56:28,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:56:33,305 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 [] [2023-08-24 15:56:42,055 INFO L124 PetriNetUnfolderBase]: 5515/9369 cut-off events. [2023-08-24 15:56:42,056 INFO L125 PetriNetUnfolderBase]: For 388303/388303 co-relation queries the response was YES. [2023-08-24 15:56:42,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105607 conditions, 9369 events. 5515/9369 cut-off events. For 388303/388303 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 65562 event pairs, 527 based on Foata normal form. 13/9382 useless extension candidates. Maximal degree in co-relation 105391. Up to 1747 conditions per place. [2023-08-24 15:56:42,186 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 757 selfloop transitions, 1027 changer transitions 74/1858 dead transitions. [2023-08-24 15:56:42,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 1858 transitions, 52034 flow [2023-08-24 15:56:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 15:56:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 15:56:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3647 transitions. [2023-08-24 15:56:42,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210387323943662 [2023-08-24 15:56:42,189 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3647 transitions. [2023-08-24 15:56:42,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3647 transitions. [2023-08-24 15:56:42,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:56:42,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3647 transitions. [2023-08-24 15:56:42,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 91.175) internal successors, (3647), 40 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states 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 15:56:42,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 284.0) internal successors, (11644), 41 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states 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 15:56:42,196 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 284.0) internal successors, (11644), 41 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states 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 15:56:42,196 INFO L175 Difference]: Start difference. First operand has 670 places, 1578 transitions, 44284 flow. Second operand 40 states and 3647 transitions. [2023-08-24 15:56:42,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 1858 transitions, 52034 flow [2023-08-24 15:56:46,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 1858 transitions, 51124 flow, removed 219 selfloop flow, removed 14 redundant places. [2023-08-24 15:56:46,519 INFO L231 Difference]: Finished difference. Result has 703 places, 1634 transitions, 47724 flow [2023-08-24 15:56:46,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=43402, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=972, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=47724, PETRI_PLACES=703, PETRI_TRANSITIONS=1634} [2023-08-24 15:56:46,520 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 674 predicate places. [2023-08-24 15:56:46,520 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 1634 transitions, 47724 flow [2023-08-24 15:56:46,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 85.86486486486487) internal successors, (3177), 37 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states 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 15:56:46,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:56:46,521 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] [2023-08-24 15:56:46,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 15:56:46,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-24 15:56:46,721 INFO L420 AbstractCegarLoop]: === Iteration 48 === 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 15:56:46,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:56:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1123056322, now seen corresponding path program 18 times [2023-08-24 15:56:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:56:46,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654298203] [2023-08-24 15:56:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:56:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:56:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:56:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:56:48,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654298203] [2023-08-24 15:56:48,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654298203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:56:48,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29226230] [2023-08-24 15:56:48,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:56:48,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:56:48,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:56:48,318 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:56:48,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 15:56:48,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:56:48,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:56:48,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 15:56:48,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:56:48,601 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 15:56:48,647 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 15:56:48,689 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 15:56:48,726 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 15:56:49,069 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 15:56:49,070 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 82 treesize of output 38 [2023-08-24 15:56:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:49,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:56:51,450 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:56:51,450 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 137 treesize of output 101 [2023-08-24 15:56:51,553 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:56:51,554 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 1020 treesize of output 990 [2023-08-24 15:56:51,684 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:56:51,685 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 467 treesize of output 403 [2023-08-24 15:56:51,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:56:51,744 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:56:51,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 279 treesize of output 290 [2023-08-24 15:56:51,867 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:56:51,867 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 279 treesize of output 265 [2023-08-24 15:57:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:57:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29226230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:57:26,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:57:26,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 15:57:26,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122859697] [2023-08-24 15:57:26,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:57:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 15:57:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:57:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 15:57:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1432, Unknown=7, NotChecked=0, Total=1640 [2023-08-24 15:57:26,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:57:26,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1634 transitions, 47724 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:57:26,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:57:26,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:57:26,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:57:42,345 INFO L124 PetriNetUnfolderBase]: 5612/9508 cut-off events. [2023-08-24 15:57:42,346 INFO L125 PetriNetUnfolderBase]: For 446994/446994 co-relation queries the response was YES. [2023-08-24 15:57:42,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110416 conditions, 9508 events. 5612/9508 cut-off events. For 446994/446994 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 66647 event pairs, 997 based on Foata normal form. 8/9516 useless extension candidates. Maximal degree in co-relation 110192. Up to 4919 conditions per place. [2023-08-24 15:57:42,492 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 1400 selfloop transitions, 347 changer transitions 49/1796 dead transitions. [2023-08-24 15:57:42,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1796 transitions, 54075 flow [2023-08-24 15:57:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 15:57:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 15:57:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2447 transitions. [2023-08-24 15:57:42,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31911841418883674 [2023-08-24 15:57:42,494 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2447 transitions. [2023-08-24 15:57:42,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2447 transitions. [2023-08-24 15:57:42,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:57:42,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2447 transitions. [2023-08-24 15:57:42,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 90.62962962962963) internal successors, (2447), 27 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states 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 15:57:42,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 284.0) internal successors, (7952), 28 states have internal predecessors, (7952), 0 states have call successors, (0), 0 states 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 15:57:42,501 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 284.0) internal successors, (7952), 28 states have internal predecessors, (7952), 0 states have call successors, (0), 0 states 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 15:57:42,501 INFO L175 Difference]: Start difference. First operand has 703 places, 1634 transitions, 47724 flow. Second operand 27 states and 2447 transitions. [2023-08-24 15:57:42,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1796 transitions, 54075 flow [2023-08-24 15:57:47,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1796 transitions, 52036 flow, removed 133 selfloop flow, removed 23 redundant places. [2023-08-24 15:57:47,923 INFO L231 Difference]: Finished difference. Result has 705 places, 1682 transitions, 48137 flow [2023-08-24 15:57:47,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=45786, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=48137, PETRI_PLACES=705, PETRI_TRANSITIONS=1682} [2023-08-24 15:57:47,925 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 676 predicate places. [2023-08-24 15:57:47,925 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 1682 transitions, 48137 flow [2023-08-24 15:57:47,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:57:47,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:57:47,926 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] [2023-08-24 15:57:47,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 15:57:48,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 15:57:48,134 INFO L420 AbstractCegarLoop]: === Iteration 49 === 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 15:57:48,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:57:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash 109514136, now seen corresponding path program 19 times [2023-08-24 15:57:48,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:57:48,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139980230] [2023-08-24 15:57:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:57:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:57:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:57:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:57:49,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:57:49,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139980230] [2023-08-24 15:57:49,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139980230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:57:49,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781577845] [2023-08-24 15:57:49,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:57:49,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:57:49,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:57:49,084 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:57:49,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 15:57:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:57:49,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 15:57:49,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:57:49,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:57:49,551 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 22 treesize of output 24 [2023-08-24 15:57:49,698 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 15:57:49,698 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 82 treesize of output 38 [2023-08-24 15:57:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:57:49,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:57:50,096 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:57:50,096 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 110 treesize of output 113 [2023-08-24 15:57:50,119 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:57:50,120 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 57 treesize of output 56 [2023-08-24 15:57:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:57:51,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781577845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:57:51,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:57:51,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 35 [2023-08-24 15:57:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043648832] [2023-08-24 15:57:51,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:57:51,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 15:57:51,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:57:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 15:57:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1183, Unknown=1, NotChecked=0, Total=1332 [2023-08-24 15:57:51,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 284 [2023-08-24 15:57:51,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 1682 transitions, 48137 flow. Second operand has 37 states, 37 states have (on average 91.86486486486487) internal successors, (3399), 37 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states 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 15:57:51,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:57:51,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 284 [2023-08-24 15:57:51,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:57:59,155 INFO L124 PetriNetUnfolderBase]: 5559/9379 cut-off events. [2023-08-24 15:57:59,155 INFO L125 PetriNetUnfolderBase]: For 410818/410818 co-relation queries the response was YES. [2023-08-24 15:57:59,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108466 conditions, 9379 events. 5559/9379 cut-off events. For 410818/410818 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 65181 event pairs, 1181 based on Foata normal form. 4/9383 useless extension candidates. Maximal degree in co-relation 108241. Up to 4919 conditions per place. [2023-08-24 15:57:59,357 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 1508 selfloop transitions, 233 changer transitions 34/1775 dead transitions. [2023-08-24 15:57:59,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1775 transitions, 52209 flow [2023-08-24 15:57:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 15:57:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 15:57:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2149 transitions. [2023-08-24 15:57:59,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34395006402048656 [2023-08-24 15:57:59,360 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2149 transitions. [2023-08-24 15:57:59,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2149 transitions. [2023-08-24 15:57:59,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:57:59,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2149 transitions. [2023-08-24 15:57:59,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.68181818181819) internal successors, (2149), 22 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states 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 15:57:59,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 284.0) internal successors, (6532), 23 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states 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 15:57:59,371 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 284.0) internal successors, (6532), 23 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states 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 15:57:59,371 INFO L175 Difference]: Start difference. First operand has 705 places, 1682 transitions, 48137 flow. Second operand 22 states and 2149 transitions. [2023-08-24 15:57:59,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1775 transitions, 52209 flow [2023-08-24 15:58:03,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 1775 transitions, 51948 flow, removed 61 selfloop flow, removed 15 redundant places. [2023-08-24 15:58:03,456 INFO L231 Difference]: Finished difference. Result has 711 places, 1678 transitions, 48170 flow [2023-08-24 15:58:03,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=47888, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48170, PETRI_PLACES=711, PETRI_TRANSITIONS=1678} [2023-08-24 15:58:03,458 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 682 predicate places. [2023-08-24 15:58:03,458 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 1678 transitions, 48170 flow [2023-08-24 15:58:03,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 91.86486486486487) internal successors, (3399), 37 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states 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 15:58:03,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:58:03,458 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] [2023-08-24 15:58:03,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 15:58:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 15:58:03,659 INFO L420 AbstractCegarLoop]: === Iteration 50 === 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 15:58:03,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:58:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1514868634, now seen corresponding path program 20 times [2023-08-24 15:58:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:58:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269100890] [2023-08-24 15:58:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:58:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:58:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:58:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:58:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:58:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269100890] [2023-08-24 15:58:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269100890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:58:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459689571] [2023-08-24 15:58:04,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:58:04,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:58:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:58:04,890 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:58:04,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 15:58:05,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:58:05,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:58:05,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 15:58:05,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:58:05,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:58:05,322 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 22 treesize of output 24 [2023-08-24 15:58:05,477 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 15:58:05,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:58:05,765 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:05,765 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 116 treesize of output 118 [2023-08-24 15:58:05,806 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:05,806 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 62 treesize of output 60 [2023-08-24 15:58:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:58:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459689571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:58:06,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:58:06,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2023-08-24 15:58:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902684083] [2023-08-24 15:58:06,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:58:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 15:58:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:58:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 15:58:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1014, Unknown=3, NotChecked=0, Total=1122 [2023-08-24 15:58:06,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 284 [2023-08-24 15:58:06,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 1678 transitions, 48170 flow. Second operand has 34 states, 34 states have (on average 91.88235294117646) internal successors, (3124), 34 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states 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 15:58:06,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:58:06,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 284 [2023-08-24 15:58:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:58:14,023 INFO L124 PetriNetUnfolderBase]: 5629/9480 cut-off events. [2023-08-24 15:58:14,024 INFO L125 PetriNetUnfolderBase]: For 418683/418683 co-relation queries the response was YES. [2023-08-24 15:58:14,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110024 conditions, 9480 events. 5629/9480 cut-off events. For 418683/418683 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 65628 event pairs, 510 based on Foata normal form. 3/9483 useless extension candidates. Maximal degree in co-relation 109799. Up to 2261 conditions per place. [2023-08-24 15:58:14,157 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 831 selfloop transitions, 1003 changer transitions 29/1863 dead transitions. [2023-08-24 15:58:14,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 1863 transitions, 54000 flow [2023-08-24 15:58:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 15:58:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 15:58:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2827 transitions. [2023-08-24 15:58:14,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432491500728509 [2023-08-24 15:58:14,160 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2827 transitions. [2023-08-24 15:58:14,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2827 transitions. [2023-08-24 15:58:14,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:58:14,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2827 transitions. [2023-08-24 15:58:14,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 97.48275862068965) internal successors, (2827), 29 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states 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 15:58:14,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 284.0) internal successors, (8520), 30 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states 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 15:58:14,168 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 284.0) internal successors, (8520), 30 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states 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 15:58:14,168 INFO L175 Difference]: Start difference. First operand has 711 places, 1678 transitions, 48170 flow. Second operand 29 states and 2827 transitions. [2023-08-24 15:58:14,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 1863 transitions, 54000 flow [2023-08-24 15:58:18,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 1863 transitions, 53658 flow, removed 19 selfloop flow, removed 18 redundant places. [2023-08-24 15:58:18,602 INFO L231 Difference]: Finished difference. Result has 725 places, 1715 transitions, 51163 flow [2023-08-24 15:58:18,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=47837, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=965, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=51163, PETRI_PLACES=725, PETRI_TRANSITIONS=1715} [2023-08-24 15:58:18,603 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 696 predicate places. [2023-08-24 15:58:18,604 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 1715 transitions, 51163 flow [2023-08-24 15:58:18,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 91.88235294117646) internal successors, (3124), 34 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states 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 15:58:18,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:58:18,604 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] [2023-08-24 15:58:18,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 15:58:18,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 15:58:18,805 INFO L420 AbstractCegarLoop]: === Iteration 51 === 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 15:58:18,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:58:18,805 INFO L85 PathProgramCache]: Analyzing trace with hash 66651592, now seen corresponding path program 21 times [2023-08-24 15:58:18,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:58:18,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365993201] [2023-08-24 15:58:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:58:18,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:58:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:58:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:58:19,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:58:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365993201] [2023-08-24 15:58:19,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365993201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:58:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991662466] [2023-08-24 15:58:19,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:58:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:58:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:58:19,927 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:58:19,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 15:58:20,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:58:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:58:20,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 15:58:20,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:58:20,187 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 15:58:20,229 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 15:58:20,264 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 15:58:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:58:20,473 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 22 treesize of output 24 [2023-08-24 15:58:20,619 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 15:58:20,619 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 82 treesize of output 38 [2023-08-24 15:58:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:58:20,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:58:24,135 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:24,136 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 130 treesize of output 94 [2023-08-24 15:58:24,248 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:58:24,248 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 4404 treesize of output 4022 [2023-08-24 15:58:24,284 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:24,284 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 429 treesize of output 371 [2023-08-24 15:58:24,295 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:58:24,333 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:24,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 265 treesize of output 270 [2023-08-24 15:58:24,416 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:58:24,416 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 259 treesize of output 233 [2023-08-24 15:58:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:58:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991662466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:58:27,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:58:27,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 15:58:27,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646434028] [2023-08-24 15:58:27,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:58:27,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 15:58:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:58:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 15:58:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1463, Unknown=12, NotChecked=0, Total=1640 [2023-08-24 15:58:27,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:58:27,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 1715 transitions, 51163 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:58:27,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:58:27,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:58:27,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:58:36,877 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 15:58:45,429 INFO L124 PetriNetUnfolderBase]: 5697/9605 cut-off events. [2023-08-24 15:58:45,430 INFO L125 PetriNetUnfolderBase]: For 469614/469614 co-relation queries the response was YES. [2023-08-24 15:58:45,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115120 conditions, 9605 events. 5697/9605 cut-off events. For 469614/469614 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 66722 event pairs, 1080 based on Foata normal form. 4/9609 useless extension candidates. Maximal degree in co-relation 114891. Up to 5039 conditions per place. [2023-08-24 15:58:45,579 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 1486 selfloop transitions, 373 changer transitions 34/1893 dead transitions. [2023-08-24 15:58:45,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 1893 transitions, 57219 flow [2023-08-24 15:58:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 15:58:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 15:58:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3170 transitions. [2023-08-24 15:58:45,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31891348088531185 [2023-08-24 15:58:45,582 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3170 transitions. [2023-08-24 15:58:45,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3170 transitions. [2023-08-24 15:58:45,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:58:45,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3170 transitions. [2023-08-24 15:58:45,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.57142857142857) internal successors, (3170), 35 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states 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 15:58:45,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 284.0) internal successors, (10224), 36 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states 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 15:58:45,590 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 284.0) internal successors, (10224), 36 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states 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 15:58:45,591 INFO L175 Difference]: Start difference. First operand has 725 places, 1715 transitions, 51163 flow. Second operand 35 states and 3170 transitions. [2023-08-24 15:58:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 1893 transitions, 57219 flow [2023-08-24 15:58:50,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 1893 transitions, 56073 flow, removed 44 selfloop flow, removed 20 redundant places. [2023-08-24 15:58:50,590 INFO L231 Difference]: Finished difference. Result has 743 places, 1746 transitions, 51859 flow [2023-08-24 15:58:50,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=50047, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=51859, PETRI_PLACES=743, PETRI_TRANSITIONS=1746} [2023-08-24 15:58:50,591 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 714 predicate places. [2023-08-24 15:58:50,591 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 1746 transitions, 51859 flow [2023-08-24 15:58:50,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states 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 15:58:50,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:58:50,592 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] [2023-08-24 15:58:50,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 15:58:50,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-24 15:58:50,793 INFO L420 AbstractCegarLoop]: === Iteration 52 === 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 15:58:50,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:58:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1212949694, now seen corresponding path program 22 times [2023-08-24 15:58:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:58:50,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920610246] [2023-08-24 15:58:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:58:50,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:58:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:58:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:58:51,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:58:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920610246] [2023-08-24 15:58:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920610246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:58:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225931797] [2023-08-24 15:58:51,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:58:51,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:58:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:58:51,865 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:58:51,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 15:58:52,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:58:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:58:52,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 15:58:52,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:58:52,127 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 15:58:52,182 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 15:58:52,225 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 15:58:52,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:58:52,387 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 22 treesize of output 24 [2023-08-24 15:58:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:58:52,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:58:53,792 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:53,793 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 131 treesize of output 95 [2023-08-24 15:58:53,857 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:53,857 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 1240 treesize of output 1159 [2023-08-24 15:58:53,897 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:53,898 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 436 treesize of output 374 [2023-08-24 15:58:53,960 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:53,960 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 356 treesize of output 328 [2023-08-24 15:58:54,026 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:58:54,026 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 229 treesize of output 233 [2023-08-24 15:58:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:58:57,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225931797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:58:57,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:58:57,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-24 15:58:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847992215] [2023-08-24 15:58:57,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:58:57,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 15:58:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:58:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 15:58:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1415, Unknown=8, NotChecked=0, Total=1560 [2023-08-24 15:58:57,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 15:58:57,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 1746 transitions, 51859 flow. Second operand has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 15:58:57,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:58:57,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 15:58:57,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:59:05,396 WARN L234 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 79 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:59:20,499 WARN L234 SmtUtils]: Spent 10.46s on a formula simplification. DAG size of input: 142 DAG size of output: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:59:22,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:59:26,916 WARN L539 Checker$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 15:59:38,865 WARN L234 SmtUtils]: Spent 10.47s on a formula simplification. DAG size of input: 144 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:59:42,988 INFO L124 PetriNetUnfolderBase]: 5701/9587 cut-off events. [2023-08-24 15:59:42,989 INFO L125 PetriNetUnfolderBase]: For 465163/465163 co-relation queries the response was YES. [2023-08-24 15:59:43,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114658 conditions, 9587 events. 5701/9587 cut-off events. For 465163/465163 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 66819 event pairs, 777 based on Foata normal form. 3/9590 useless extension candidates. Maximal degree in co-relation 114427. Up to 4094 conditions per place. [2023-08-24 15:59:43,132 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 1231 selfloop transitions, 813 changer transitions 30/2074 dead transitions. [2023-08-24 15:59:43,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 2074 transitions, 59901 flow [2023-08-24 15:59:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 15:59:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 15:59:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3895 transitions. [2023-08-24 15:59:43,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.318948575171962 [2023-08-24 15:59:43,135 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3895 transitions. [2023-08-24 15:59:43,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3895 transitions. [2023-08-24 15:59:43,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:59:43,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3895 transitions. [2023-08-24 15:59:43,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 90.5813953488372) internal successors, (3895), 43 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states 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 15:59:43,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 284.0) internal successors, (12496), 44 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states 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 15:59:43,146 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 284.0) internal successors, (12496), 44 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states 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 15:59:43,146 INFO L175 Difference]: Start difference. First operand has 743 places, 1746 transitions, 51859 flow. Second operand 43 states and 3895 transitions. [2023-08-24 15:59:43,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 2074 transitions, 59901 flow [2023-08-24 15:59:48,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 2074 transitions, 59013 flow, removed 99 selfloop flow, removed 30 redundant places. [2023-08-24 15:59:48,202 INFO L231 Difference]: Finished difference. Result has 761 places, 1800 transitions, 53832 flow [2023-08-24 15:59:48,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=51006, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=965, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=53832, PETRI_PLACES=761, PETRI_TRANSITIONS=1800} [2023-08-24 15:59:48,204 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 732 predicate places. [2023-08-24 15:59:48,204 INFO L495 AbstractCegarLoop]: Abstraction has has 761 places, 1800 transitions, 53832 flow [2023-08-24 15:59:48,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 15:59:48,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:59:48,205 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] [2023-08-24 15:59:48,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 15:59:48,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:59:48,411 INFO L420 AbstractCegarLoop]: === Iteration 53 === 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 15:59:48,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:59:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash -425944170, now seen corresponding path program 23 times [2023-08-24 15:59:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:59:48,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443609001] [2023-08-24 15:59:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:59:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:59:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:59:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:59:49,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:59:49,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443609001] [2023-08-24 15:59:49,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443609001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:59:49,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470441897] [2023-08-24 15:59:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:59:49,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:59:49,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:59:49,275 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:59:49,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 15:59:49,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:59:49,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:59:49,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 15:59:49,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:59:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:59:49,836 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 20 treesize of output 22 [2023-08-24 15:59:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:59:49,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:59:50,375 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:59:50,375 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 116 treesize of output 118 [2023-08-24 15:59:50,399 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:59:50,400 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 62 treesize of output 60 [2023-08-24 15:59:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:59:50,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470441897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:59:50,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:59:50,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-24 15:59:50,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770231359] [2023-08-24 15:59:50,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:59:50,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 15:59:50,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:59:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 15:59:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1224, Unknown=1, NotChecked=0, Total=1406 [2023-08-24 15:59:51,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 284 [2023-08-24 15:59:51,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 761 places, 1800 transitions, 53832 flow. Second operand has 38 states, 38 states have (on average 91.8157894736842) internal successors, (3489), 38 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states 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 15:59:51,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:59:51,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 284 [2023-08-24 15:59:51,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:12,748 INFO L124 PetriNetUnfolderBase]: 5715/9605 cut-off events. [2023-08-24 16:00:12,749 INFO L125 PetriNetUnfolderBase]: For 480993/480993 co-relation queries the response was YES. [2023-08-24 16:00:12,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115949 conditions, 9605 events. 5715/9605 cut-off events. For 480993/480993 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 66441 event pairs, 572 based on Foata normal form. 2/9607 useless extension candidates. Maximal degree in co-relation 115719. Up to 2214 conditions per place. [2023-08-24 16:00:12,889 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 1017 selfloop transitions, 967 changer transitions 28/2012 dead transitions. [2023-08-24 16:00:12,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 2012 transitions, 59779 flow [2023-08-24 16:00:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 16:00:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 16:00:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3688 transitions. [2023-08-24 16:00:12,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34173461823573015 [2023-08-24 16:00:12,892 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3688 transitions. [2023-08-24 16:00:12,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3688 transitions. [2023-08-24 16:00:12,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:12,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3688 transitions. [2023-08-24 16:00:12,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 97.05263157894737) internal successors, (3688), 38 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states 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 16:00:12,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states 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 16:00:12,899 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states 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 16:00:12,899 INFO L175 Difference]: Start difference. First operand has 761 places, 1800 transitions, 53832 flow. Second operand 38 states and 3688 transitions. [2023-08-24 16:00:12,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 2012 transitions, 59779 flow Received shutdown request... [2023-08-24 16:00:14,171 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 16:00:14,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 16:00:14,202 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:00:14,202 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 16:00:14,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-24 16:00:14,372 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 16:00:14,373 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 16:00:14,373 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 16:00:14,373 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 16:00:14,374 INFO L445 BasicCegarLoop]: Path program histogram: [23, 23, 5, 1, 1] [2023-08-24 16:00:14,376 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 16:00:14,376 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 16:00:14,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:00:14 BasicIcfg [2023-08-24 16:00:14,378 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 16:00:14,378 INFO L158 Benchmark]: Toolchain (without parser) took 785378.83ms. Allocated memory was 381.7MB in the beginning and 5.4GB in the end (delta: 5.0GB). Free memory was 357.5MB in the beginning and 3.4GB in the end (delta: -3.0GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-24 16:00:14,378 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 381.7MB. Free memory was 359.6MB in the beginning and 359.5MB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:00:14,378 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.03ms. Allocated memory is still 381.7MB. Free memory was 357.5MB in the beginning and 345.6MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 16:00:14,378 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.27ms. Allocated memory is still 381.7MB. Free memory was 345.6MB in the beginning and 343.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:00:14,379 INFO L158 Benchmark]: Boogie Preprocessor took 26.68ms. Allocated memory is still 381.7MB. Free memory was 343.5MB in the beginning and 342.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:00:14,379 INFO L158 Benchmark]: RCFGBuilder took 570.75ms. Allocated memory is still 381.7MB. Free memory was 342.0MB in the beginning and 314.7MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-24 16:00:14,379 INFO L158 Benchmark]: TraceAbstraction took 784502.25ms. Allocated memory was 381.7MB in the beginning and 5.4GB in the end (delta: 5.0GB). Free memory was 314.1MB in the beginning and 3.4GB in the end (delta: -3.1GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-24 16:00:14,380 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 381.7MB. Free memory was 359.6MB in the beginning and 359.5MB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 229.03ms. Allocated memory is still 381.7MB. Free memory was 357.5MB in the beginning and 345.6MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.27ms. Allocated memory is still 381.7MB. Free memory was 345.6MB in the beginning and 343.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.68ms. Allocated memory is still 381.7MB. Free memory was 343.5MB in the beginning and 342.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 570.75ms. Allocated memory is still 381.7MB. Free memory was 342.0MB in the beginning and 314.7MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 784502.25ms. Allocated memory was 381.7MB in the beginning and 5.4GB in the end (delta: 5.0GB). Free memory was 314.1MB in the beginning and 3.4GB in the end (delta: -3.1GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 140 PlacesBefore, 29 PlacesAfterwards, 139 TransitionsBefore, 22 TransitionsAfterwards, 1600 CoEnabledTransitionPairs, 7 FixpointIterations, 76 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 132 TotalNumberOfCompositions, 1697 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1444, independent: 1411, independent conditional: 0, independent unconditional: 1411, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 842, independent: 830, independent conditional: 0, independent unconditional: 830, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1444, independent: 581, independent conditional: 0, independent unconditional: 581, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 842, unknown conditional: 0, unknown unconditional: 842] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 180 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: 784.4s, OverallIterations: 53, TraceHistogramMax: 3, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 568.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.0s, HoareTripleCheckerStatistics: 734 mSolverCounterUnknown, 12024 SdHoareTripleChecker+Valid, 130.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12024 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 124.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 759 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2427 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50781 IncrementalHoareTripleChecker+Invalid, 54701 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2427 mSolverCounterUnsat, 0 mSDtfsCounter, 50781 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3108 GetRequests, 892 SyntacticMatches, 9 SemanticMatches, 2207 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 30272 ImplicationChecksByTransitivity, 373.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53832occurred in iteration=52, InterpolantAutomatonStates: 1159, 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: 0.6s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 193.4s InterpolantComputationTime, 2172 NumberOfCodeBlocks, 2147 NumberOfCodeBlocksAsserted, 131 NumberOfCheckSat, 2804 ConstructedInterpolants, 146 QuantifiedInterpolants, 111385 SizeOfPredicates, 875 NumberOfNonLiveVariables, 10841 ConjunctsInSsa, 1903 ConjunctsInUnsatCore, 132 InterpolantComputations, 25 PerfectInterpolantSequences, 132/606 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