/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:29:18,265 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:29:18,311 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 09:29:18,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:29:18,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:29:18,334 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:29:18,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:29:18,335 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:29:18,336 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:29:18,336 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:29:18,336 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:29:18,337 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:29:18,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:29:18,337 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:29:18,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:29:18,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:29:18,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:29:18,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:29:18,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:29:18,339 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:29:18,340 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:29:18,340 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:29:18,340 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:29:18,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:29:18,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:29:18,341 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:29:18,341 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:29:18,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:29:18,342 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:29:18,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:29:18,342 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:29:18,342 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:29:18,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:29:18,343 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:29:18,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:29:18,343 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:29:18,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:29:18,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:29:18,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:29:18,672 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:29:18,672 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:29:18,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-24 09:29:19,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:29:20,162 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:29:20,162 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-24 09:29:20,171 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756ccc3b9/3bc8a678376e4143ad45ee24b4befa47/FLAGe1f484544 [2023-08-24 09:29:20,185 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756ccc3b9/3bc8a678376e4143ad45ee24b4befa47 [2023-08-24 09:29:20,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:29:20,192 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:29:20,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:29:20,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:29:20,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:29:20,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b9cc43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20, skipping insertion in model container [2023-08-24 09:29:20,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,221 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:29:20,405 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-mts.wvr.c[2533,2546] [2023-08-24 09:29:20,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:29:20,428 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:29:20,459 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-mts.wvr.c[2533,2546] [2023-08-24 09:29:20,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:29:20,471 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:29:20,472 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:29:20,478 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:29:20,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20 WrapperNode [2023-08-24 09:29:20,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:29:20,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:29:20,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:29:20,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:29:20,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,542 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 232 [2023-08-24 09:29:20,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:29:20,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:29:20,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:29:20,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:29:20,549 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,560 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,563 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,565 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:29:20,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:29:20,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:29:20,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:29:20,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (1/1) ... [2023-08-24 09:29:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:29:20,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:20,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 09:29:20,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 09:29:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:29:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:29:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:29:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:29:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:29:20,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:29:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:29:20,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:29:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:29:20,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:29:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:29:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:29:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:29:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 09:29:20,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:29:20,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:29:20,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:29:20,641 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 09:29:20,750 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:29:20,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:29:21,048 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:29:21,206 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:29:21,206 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 09:29:21,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:29:21 BoogieIcfgContainer [2023-08-24 09:29:21,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:29:21,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:29:21,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:29:21,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:29:21,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:29:20" (1/3) ... [2023-08-24 09:29:21,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@893dcfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:29:21, skipping insertion in model container [2023-08-24 09:29:21,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:29:20" (2/3) ... [2023-08-24 09:29:21,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@893dcfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:29:21, skipping insertion in model container [2023-08-24 09:29:21,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:29:21" (3/3) ... [2023-08-24 09:29:21,217 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-08-24 09:29:21,232 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:29:21,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:29:21,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:29:21,315 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 09:29:21,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 210 transitions, 444 flow [2023-08-24 09:29:21,475 INFO L124 PetriNetUnfolderBase]: 18/207 cut-off events. [2023-08-24 09:29:21,475 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:29:21,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 207 events. 18/207 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 308 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-08-24 09:29:21,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 210 transitions, 444 flow [2023-08-24 09:29:21,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2023-08-24 09:29:21,512 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:29:21,519 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 197 transitions, 412 flow [2023-08-24 09:29:21,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 197 transitions, 412 flow [2023-08-24 09:29:21,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 197 transitions, 412 flow [2023-08-24 09:29:21,558 INFO L124 PetriNetUnfolderBase]: 18/197 cut-off events. [2023-08-24 09:29:21,558 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:29:21,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 197 events. 18/197 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 307 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-08-24 09:29:21,564 INFO L119 LiptonReduction]: Number of co-enabled transitions 7578 [2023-08-24 09:29:27,888 INFO L134 LiptonReduction]: Checked pairs total: 7276 [2023-08-24 09:29:27,888 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-24 09:29:27,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:29:27,909 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;@564c5476, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:29:27,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 09:29:27,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:29:27,916 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-08-24 09:29:27,916 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:29:27,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:27,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:27,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:27,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 400613671, now seen corresponding path program 1 times [2023-08-24 09:29:27,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:27,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680169624] [2023-08-24 09:29:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:28,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:28,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680169624] [2023-08-24 09:29:28,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680169624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:29:28,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:29:28,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 09:29:28,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396954736] [2023-08-24 09:29:28,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:29:28,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:29:28,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:29:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:29:28,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 424 [2023-08-24 09:29:28,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:28,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:28,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 424 [2023-08-24 09:29:28,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:28,582 INFO L124 PetriNetUnfolderBase]: 429/600 cut-off events. [2023-08-24 09:29:28,582 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-24 09:29:28,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 600 events. 429/600 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1980 event pairs, 246 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 1042. Up to 596 conditions per place. [2023-08-24 09:29:28,590 INFO L140 encePairwiseOnDemand]: 421/424 looper letters, 23 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-24 09:29:28,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 122 flow [2023-08-24 09:29:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:29:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:29:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-24 09:29:28,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40959119496855345 [2023-08-24 09:29:28,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-24 09:29:28,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-24 09:29:28,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:28,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-24 09:29:28,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 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 09:29:28,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:28,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:28,621 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 70 flow. Second operand 3 states and 521 transitions. [2023-08-24 09:29:28,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 122 flow [2023-08-24 09:29:28,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 09:29:28,625 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 70 flow [2023-08-24 09:29:28,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-08-24 09:29:28,629 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-24 09:29:28,629 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 70 flow [2023-08-24 09:29:28,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:28,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:28,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:28,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:29:28,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:28,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash 915438570, now seen corresponding path program 1 times [2023-08-24 09:29:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:28,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33001204] [2023-08-24 09:29:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:28,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:28,781 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 09:29:28,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33001204] [2023-08-24 09:29:28,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33001204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054801495] [2023-08-24 09:29:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:28,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:28,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:28,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:28,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 09:29:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:28,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 09:29:28,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:29,000 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 09:29:29,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:29,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054801495] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:29,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:29:29,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 09:29:29,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246265459] [2023-08-24 09:29:29,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:29:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:29:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:29:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 09:29:29,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 424 [2023-08-24 09:29:29,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:29,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 424 [2023-08-24 09:29:29,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:29,180 INFO L124 PetriNetUnfolderBase]: 508/713 cut-off events. [2023-08-24 09:29:29,180 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 09:29:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 713 events. 508/713 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2537 event pairs, 173 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 1442. Up to 422 conditions per place. [2023-08-24 09:29:29,185 INFO L140 encePairwiseOnDemand]: 418/424 looper letters, 31 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2023-08-24 09:29:29,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 166 flow [2023-08-24 09:29:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:29:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:29:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2023-08-24 09:29:29,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042452830188679 [2023-08-24 09:29:29,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2023-08-24 09:29:29,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2023-08-24 09:29:29,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:29,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2023-08-24 09:29:29,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 424.0) internal successors, (2544), 6 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 424.0) internal successors, (2544), 6 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,203 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 70 flow. Second operand 5 states and 857 transitions. [2023-08-24 09:29:29,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 166 flow [2023-08-24 09:29:29,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 162 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:29:29,204 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 89 flow [2023-08-24 09:29:29,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-24 09:29:29,205 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-24 09:29:29,206 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 89 flow [2023-08-24 09:29:29,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:29,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:29,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:29,412 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 09:29:29,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:29,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1277284309, now seen corresponding path program 1 times [2023-08-24 09:29:29,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:29,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237655410] [2023-08-24 09:29:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:29,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:29,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237655410] [2023-08-24 09:29:29,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237655410] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:29,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452727667] [2023-08-24 09:29:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:29,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:29,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:29,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:29,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 09:29:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:29,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:29:29,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:29,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:29,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452727667] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:29,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:29:29,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-24 09:29:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572901572] [2023-08-24 09:29:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:29:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:29:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:29:29,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:29:29,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:29:29,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:29,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:29,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:29:29,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:30,144 INFO L124 PetriNetUnfolderBase]: 626/888 cut-off events. [2023-08-24 09:29:30,144 INFO L125 PetriNetUnfolderBase]: For 445/545 co-relation queries the response was YES. [2023-08-24 09:29:30,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 888 events. 626/888 cut-off events. For 445/545 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3096 event pairs, 183 based on Foata normal form. 100/838 useless extension candidates. Maximal degree in co-relation 2106. Up to 410 conditions per place. [2023-08-24 09:29:30,150 INFO L140 encePairwiseOnDemand]: 414/424 looper letters, 50 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-08-24 09:29:30,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 336 flow [2023-08-24 09:29:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:29:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:29:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1311 transitions. [2023-08-24 09:29:30,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38649764150943394 [2023-08-24 09:29:30,154 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1311 transitions. [2023-08-24 09:29:30,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1311 transitions. [2023-08-24 09:29:30,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:30,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1311 transitions. [2023-08-24 09:29:30,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 163.875) internal successors, (1311), 8 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:30,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 424.0) internal successors, (3816), 9 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 09:29:30,164 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 424.0) internal successors, (3816), 9 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 09:29:30,164 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 89 flow. Second operand 8 states and 1311 transitions. [2023-08-24 09:29:30,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 336 flow [2023-08-24 09:29:30,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 66 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 09:29:30,168 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 172 flow [2023-08-24 09:29:30,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-24 09:29:30,169 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2023-08-24 09:29:30,169 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 172 flow [2023-08-24 09:29:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:30,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:30,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:30,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:30,379 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 09:29:30,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:30,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:30,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1760524432, now seen corresponding path program 1 times [2023-08-24 09:29:30,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:30,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042620345] [2023-08-24 09:29:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:30,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:32,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:32,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042620345] [2023-08-24 09:29:32,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042620345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:32,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443365445] [2023-08-24 09:29:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:32,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:32,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:32,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 09:29:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:32,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-24 09:29:32,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:32,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:29:32,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:29:32,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:32,671 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 14 treesize of output 16 [2023-08-24 09:29:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:32,825 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 14 treesize of output 16 [2023-08-24 09:29:33,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:33,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 56 [2023-08-24 09:29:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:33,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:34,560 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_thread1Thread1of1ForFork2_plus_~a#1| |c_thread1Thread1of1ForFork2_plus_~b#1|)) (.cse3 (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int))) (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (<= 0 (+ c_~mts3~0 .cse10)) (< (+ c_~sum~0 .cse10 c_~mts2~0) 1) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))))) (and (or (< (+ |c_thread1Thread1of1ForFork2_plus_~a#1| |c_thread1Thread1of1ForFork2_plus_~b#1| 2147483648) 0) (<= 0 .cse0) (and (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (< (+ c_~sum~0 .cse1 c_~mts2~0) 1) (<= c_~N~0 ~M~0) (< (+ c_~mts3~0 .cse1) 0) (< (+ ~M~0 1) c_~N~0)))) (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int))) (let ((.cse2 (+ c_~mts3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))))) (or (<= c_~N~0 ~M~0) (< .cse2 0) (= .cse2 0) (< (+ ~M~0 1) c_~N~0)))) .cse3)) (or (< .cse0 0) (< 2147483647 .cse0) (let ((.cse5 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_157 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base))) (or (= (+ c_~mts1~0 (select .cse4 .cse5)) 0) (forall ((~M~0 Int)) (or (<= 0 (+ c_~mts3~0 (select .cse4 (+ c_~A~0.offset (* ~M~0 4))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))))) (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base))) (let ((.cse6 (select .cse7 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= c_~N~0 ~M~0) (< (+ c_~sum~0 .cse6 c_~mts2~0) (+ c_~mts1~0 (select .cse7 .cse5) 1)) (< (+ c_~mts3~0 .cse6) 0) (< (+ ~M~0 1) c_~N~0))))) (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base))) (let ((.cse9 (+ c_~mts3~0 (select .cse8 (+ c_~A~0.offset (* ~M~0 4)))))) (or (= (+ c_~mts1~0 (select .cse8 .cse5)) .cse9) (<= c_~N~0 ~M~0) (< .cse9 0) (< (+ ~M~0 1) c_~N~0))))) .cse3))))) is different from false [2023-08-24 09:29:35,173 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (let ((.cse10 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (<= 0 (+ c_~mts3~0 .cse10)) (<= c_~N~0 ~M~0) (< (+ c_~sum~0 .cse10 c_~mts2~0) 1) (< (+ ~M~0 1) c_~N~0))))) (.cse3 (+ |c_thread1Thread1of1ForFork2_plus_~a#1| |c_thread1Thread1of1ForFork2_plus_~b#1|))) (and (or (and (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (< (+ c_~mts3~0 .cse0) 0) (<= c_~N~0 ~M~0) (< (+ c_~sum~0 .cse0 c_~mts2~0) 1) (< (+ ~M~0 1) c_~N~0)))) .cse1 (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (let ((.cse2 (+ c_~mts3~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))))) (or (< .cse2 0) (<= c_~N~0 ~M~0) (= .cse2 0) (< (+ ~M~0 1) c_~N~0))))) (< (+ |c_thread1Thread1of1ForFork2_plus_~a#1| |c_thread1Thread1of1ForFork2_plus_~b#1| 2147483648) 0) (<= 0 .cse3)) (or (< .cse3 0) (let ((.cse5 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base))) (let ((.cse6 (+ c_~mts3~0 (select .cse4 (+ c_~A~0.offset (* ~M~0 4)))))) (or (= (+ (select .cse4 .cse5) c_~mts1~0) .cse6) (< .cse6 0) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))))) (forall ((~M~0 Int) (v_ArrVal_157 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base))) (let ((.cse7 (select .cse8 (+ c_~A~0.offset (* ~M~0 4))))) (or (< (+ c_~mts3~0 .cse7) 0) (<= c_~N~0 ~M~0) (< (+ c_~sum~0 .cse7 c_~mts2~0) (+ (select .cse8 .cse5) c_~mts1~0 1)) (< (+ ~M~0 1) c_~N~0))))) .cse1 (forall ((v_ArrVal_157 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (let ((.cse9 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_156) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_157) c_~A~0.base))) (or (forall ((~M~0 Int)) (or (<= 0 (+ c_~mts3~0 (select .cse9 (+ c_~A~0.offset (* ~M~0 4))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (= (+ (select .cse9 .cse5) c_~mts1~0) 0)))))) (< 2147483647 .cse3)))) is different from false [2023-08-24 09:29:36,989 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:36,990 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 146 treesize of output 98 [2023-08-24 09:29:37,007 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:37,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3149 treesize of output 2989 [2023-08-24 09:29:37,054 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:37,055 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 191 treesize of output 181 [2023-08-24 09:29:37,079 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:37,079 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 155 treesize of output 135 [2023-08-24 09:29:37,107 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:37,108 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 181 treesize of output 133 [2023-08-24 09:29:37,867 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:37,868 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 119 treesize of output 83 [2023-08-24 09:29:37,887 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:37,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1423 treesize of output 1355 [2023-08-24 09:29:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:37,941 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 158 [2023-08-24 09:29:37,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 251 [2023-08-24 09:29:37,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 113 [2023-08-24 09:29:38,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:38,188 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 118 treesize of output 82 [2023-08-24 09:29:38,208 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:38,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2751 treesize of output 2619 [2023-08-24 09:29:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:38,245 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 154 [2023-08-24 09:29:38,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 111 [2023-08-24 09:29:38,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 109 [2023-08-24 09:29:38,449 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:38,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 82 [2023-08-24 09:29:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:38,479 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:38,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2023-08-24 09:29:38,497 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:38,499 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 54 treesize of output 42 [2023-08-24 09:29:38,544 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:29:38,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 1 [2023-08-24 09:29:38,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:38,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 96 [2023-08-24 09:29:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:38,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:38,574 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:38,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 103 [2023-08-24 09:29:38,605 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:38,606 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 57 treesize of output 43 [2023-08-24 09:29:38,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:38,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 77 [2023-08-24 09:29:38,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:38,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:38,655 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:38,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2023-08-24 09:29:38,680 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:38,681 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 49 treesize of output 41 [2023-08-24 09:29:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:38,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443365445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:38,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:38,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 33 [2023-08-24 09:29:38,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736355264] [2023-08-24 09:29:38,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:38,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 09:29:38,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:38,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 09:29:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=896, Unknown=2, NotChecked=126, Total=1190 [2023-08-24 09:29:38,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:29:38,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 172 flow. Second operand has 35 states, 35 states have (on average 113.05714285714286) internal successors, (3957), 35 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:38,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:38,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:29:38,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:43,114 INFO L124 PetriNetUnfolderBase]: 1643/2415 cut-off events. [2023-08-24 09:29:43,115 INFO L125 PetriNetUnfolderBase]: For 2909/2909 co-relation queries the response was YES. [2023-08-24 09:29:43,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8261 conditions, 2415 events. 1643/2415 cut-off events. For 2909/2909 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10303 event pairs, 86 based on Foata normal form. 3/2302 useless extension candidates. Maximal degree in co-relation 6721. Up to 1312 conditions per place. [2023-08-24 09:29:43,129 INFO L140 encePairwiseOnDemand]: 409/424 looper letters, 203 selfloop transitions, 92 changer transitions 15/310 dead transitions. [2023-08-24 09:29:43,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 310 transitions, 1978 flow [2023-08-24 09:29:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:29:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:29:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3260 transitions. [2023-08-24 09:29:43,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28476589797344515 [2023-08-24 09:29:43,140 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3260 transitions. [2023-08-24 09:29:43,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3260 transitions. [2023-08-24 09:29:43,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:43,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3260 transitions. [2023-08-24 09:29:43,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 120.74074074074075) internal successors, (3260), 27 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:43,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 424.0) internal successors, (11872), 28 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:43,164 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 424.0) internal successors, (11872), 28 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:43,165 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 172 flow. Second operand 27 states and 3260 transitions. [2023-08-24 09:29:43,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 310 transitions, 1978 flow [2023-08-24 09:29:43,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 310 transitions, 1923 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-24 09:29:43,175 INFO L231 Difference]: Finished difference. Result has 78 places, 126 transitions, 917 flow [2023-08-24 09:29:43,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=917, PETRI_PLACES=78, PETRI_TRANSITIONS=126} [2023-08-24 09:29:43,175 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2023-08-24 09:29:43,176 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 126 transitions, 917 flow [2023-08-24 09:29:43,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 113.05714285714286) internal successors, (3957), 35 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:43,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:43,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:43,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:43,383 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 09:29:43,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:43,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash -216454542, now seen corresponding path program 2 times [2023-08-24 09:29:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:43,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481011628] [2023-08-24 09:29:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:44,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481011628] [2023-08-24 09:29:44,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481011628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:44,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52419615] [2023-08-24 09:29:44,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:29:44,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:44,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:44,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 09:29:44,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:29:44,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:44,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 09:29:44,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:45,064 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:45,064 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 111 treesize of output 85 [2023-08-24 09:29:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:45,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:46,152 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:46,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 72 [2023-08-24 09:29:46,204 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:29:46,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 98 [2023-08-24 09:29:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52419615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:46,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:46,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-24 09:29:46,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424480858] [2023-08-24 09:29:46,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:46,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 09:29:46,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 09:29:46,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 09:29:46,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:29:46,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 126 transitions, 917 flow. Second operand has 35 states, 35 states have (on average 123.05714285714286) internal successors, (4307), 35 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:46,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:46,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:29:46,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:49,137 INFO L124 PetriNetUnfolderBase]: 2114/3159 cut-off events. [2023-08-24 09:29:49,137 INFO L125 PetriNetUnfolderBase]: For 8219/8219 co-relation queries the response was YES. [2023-08-24 09:29:49,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13354 conditions, 3159 events. 2114/3159 cut-off events. For 8219/8219 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14460 event pairs, 429 based on Foata normal form. 33/3076 useless extension candidates. Maximal degree in co-relation 13232. Up to 2188 conditions per place. [2023-08-24 09:29:49,155 INFO L140 encePairwiseOnDemand]: 409/424 looper letters, 171 selfloop transitions, 150 changer transitions 15/336 dead transitions. [2023-08-24 09:29:49,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 336 transitions, 2880 flow [2023-08-24 09:29:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 09:29:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 09:29:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3735 transitions. [2023-08-24 09:29:49,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30375731945348083 [2023-08-24 09:29:49,165 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3735 transitions. [2023-08-24 09:29:49,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3735 transitions. [2023-08-24 09:29:49,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:49,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3735 transitions. [2023-08-24 09:29:49,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 128.79310344827587) internal successors, (3735), 29 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:49,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 424.0) internal successors, (12720), 30 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:49,189 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 424.0) internal successors, (12720), 30 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:49,190 INFO L175 Difference]: Start difference. First operand has 78 places, 126 transitions, 917 flow. Second operand 29 states and 3735 transitions. [2023-08-24 09:29:49,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 336 transitions, 2880 flow [2023-08-24 09:29:49,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 336 transitions, 2825 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-08-24 09:29:49,226 INFO L231 Difference]: Finished difference. Result has 123 places, 222 transitions, 2183 flow [2023-08-24 09:29:49,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2183, PETRI_PLACES=123, PETRI_TRANSITIONS=222} [2023-08-24 09:29:49,229 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 91 predicate places. [2023-08-24 09:29:49,229 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 222 transitions, 2183 flow [2023-08-24 09:29:49,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 123.05714285714286) internal successors, (4307), 35 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:49,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:49,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:49,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:49,437 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 09:29:49,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:49,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash -17395728, now seen corresponding path program 3 times [2023-08-24 09:29:49,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:49,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364134655] [2023-08-24 09:29:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:49,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:50,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364134655] [2023-08-24 09:29:50,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364134655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626951594] [2023-08-24 09:29:50,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:29:50,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:50,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:50,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:50,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 09:29:50,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:29:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:50,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 09:29:50,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:51,178 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 50 treesize of output 44 [2023-08-24 09:29:51,385 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:51,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 56 [2023-08-24 09:29:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:51,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:52,760 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:52,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 613 treesize of output 405 [2023-08-24 09:29:52,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 386 treesize of output 374 [2023-08-24 09:29:52,775 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 374 treesize of output 362 [2023-08-24 09:29:52,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 350 [2023-08-24 09:29:52,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 350 treesize of output 332 [2023-08-24 09:29:52,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 320 [2023-08-24 09:29:52,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 308 [2023-08-24 09:29:53,016 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:53,021 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:29:53,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 1 [2023-08-24 09:29:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626951594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:53,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:53,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-08-24 09:29:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660739164] [2023-08-24 09:29:53,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:53,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 09:29:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 09:29:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1246, Unknown=1, NotChecked=0, Total=1482 [2023-08-24 09:29:53,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:29:53,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 222 transitions, 2183 flow. Second operand has 39 states, 39 states have (on average 112.84615384615384) internal successors, (4401), 39 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:53,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:53,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:29:53,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:29:55,553 INFO L124 PetriNetUnfolderBase]: 2476/3759 cut-off events. [2023-08-24 09:29:55,553 INFO L125 PetriNetUnfolderBase]: For 22198/22198 co-relation queries the response was YES. [2023-08-24 09:29:55,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20259 conditions, 3759 events. 2476/3759 cut-off events. For 22198/22198 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18445 event pairs, 515 based on Foata normal form. 1/3678 useless extension candidates. Maximal degree in co-relation 20123. Up to 2939 conditions per place. [2023-08-24 09:29:55,585 INFO L140 encePairwiseOnDemand]: 411/424 looper letters, 217 selfloop transitions, 169 changer transitions 6/392 dead transitions. [2023-08-24 09:29:55,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 392 transitions, 4409 flow [2023-08-24 09:29:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 09:29:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 09:29:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1908 transitions. [2023-08-24 09:29:55,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28125 [2023-08-24 09:29:55,591 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1908 transitions. [2023-08-24 09:29:55,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1908 transitions. [2023-08-24 09:29:55,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:29:55,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1908 transitions. [2023-08-24 09:29:55,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 119.25) internal successors, (1908), 16 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:55,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 424.0) internal successors, (7208), 17 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:55,604 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 424.0) internal successors, (7208), 17 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:55,604 INFO L175 Difference]: Start difference. First operand has 123 places, 222 transitions, 2183 flow. Second operand 16 states and 1908 transitions. [2023-08-24 09:29:55,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 392 transitions, 4409 flow [2023-08-24 09:29:55,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 392 transitions, 4276 flow, removed 63 selfloop flow, removed 3 redundant places. [2023-08-24 09:29:55,695 INFO L231 Difference]: Finished difference. Result has 144 places, 309 transitions, 3603 flow [2023-08-24 09:29:55,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3603, PETRI_PLACES=144, PETRI_TRANSITIONS=309} [2023-08-24 09:29:55,699 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2023-08-24 09:29:55,699 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 309 transitions, 3603 flow [2023-08-24 09:29:55,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 112.84615384615384) internal successors, (4401), 39 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:55,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:29:55,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:29:55,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 09:29:55,906 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 09:29:55,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:29:55,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:29:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash -924205772, now seen corresponding path program 4 times [2023-08-24 09:29:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:29:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23619814] [2023-08-24 09:29:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:29:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:29:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:29:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:57,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:29:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23619814] [2023-08-24 09:29:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23619814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:29:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731703284] [2023-08-24 09:29:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:29:57,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:29:57,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:29:57,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:29:57,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 09:29:57,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:29:57,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:29:57,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 09:29:57,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:29:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:29:57,497 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 50 treesize of output 44 [2023-08-24 09:29:57,681 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:57,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 56 [2023-08-24 09:29:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:57,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:29:58,464 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:29:58,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 322 treesize of output 218 [2023-08-24 09:29:58,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 187 [2023-08-24 09:29:58,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 175 [2023-08-24 09:29:58,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 169 [2023-08-24 09:29:58,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2023-08-24 09:29:58,557 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:29:58,561 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:29:58,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 1 [2023-08-24 09:29:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:29:58,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731703284] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:29:58,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:29:58,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-24 09:29:58,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16649162] [2023-08-24 09:29:58,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:29:58,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 09:29:58,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:29:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 09:29:58,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1213, Unknown=1, NotChecked=0, Total=1406 [2023-08-24 09:29:58,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 424 [2023-08-24 09:29:58,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 309 transitions, 3603 flow. Second operand has 38 states, 38 states have (on average 118.89473684210526) internal successors, (4518), 38 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:29:58,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:29:58,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 424 [2023-08-24 09:29:58,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:30:00,963 INFO L124 PetriNetUnfolderBase]: 2716/4185 cut-off events. [2023-08-24 09:30:00,963 INFO L125 PetriNetUnfolderBase]: For 28703/28703 co-relation queries the response was YES. [2023-08-24 09:30:00,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24163 conditions, 4185 events. 2716/4185 cut-off events. For 28703/28703 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21471 event pairs, 658 based on Foata normal form. 1/4112 useless extension candidates. Maximal degree in co-relation 24023. Up to 3308 conditions per place. [2023-08-24 09:30:00,991 INFO L140 encePairwiseOnDemand]: 411/424 looper letters, 233 selfloop transitions, 215 changer transitions 6/454 dead transitions. [2023-08-24 09:30:00,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 454 transitions, 5820 flow [2023-08-24 09:30:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:30:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:30:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2119 transitions. [2023-08-24 09:30:00,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29397891231964485 [2023-08-24 09:30:00,996 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2119 transitions. [2023-08-24 09:30:00,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2119 transitions. [2023-08-24 09:30:00,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:30:00,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2119 transitions. [2023-08-24 09:30:01,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 124.6470588235294) internal successors, (2119), 17 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:01,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 424.0) internal successors, (7632), 18 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:01,009 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 424.0) internal successors, (7632), 18 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:01,009 INFO L175 Difference]: Start difference. First operand has 144 places, 309 transitions, 3603 flow. Second operand 17 states and 2119 transitions. [2023-08-24 09:30:01,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 454 transitions, 5820 flow [2023-08-24 09:30:01,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 454 transitions, 5732 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-08-24 09:30:01,125 INFO L231 Difference]: Finished difference. Result has 164 places, 379 transitions, 5022 flow [2023-08-24 09:30:01,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5022, PETRI_PLACES=164, PETRI_TRANSITIONS=379} [2023-08-24 09:30:01,126 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 132 predicate places. [2023-08-24 09:30:01,126 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 379 transitions, 5022 flow [2023-08-24 09:30:01,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 118.89473684210526) internal successors, (4518), 38 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:01,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:30:01,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:30:01,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 09:30:01,334 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 09:30:01,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:30:01,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:30:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1222262636, now seen corresponding path program 5 times [2023-08-24 09:30:01,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:30:01,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305098711] [2023-08-24 09:30:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:30:01,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:30:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:30:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:02,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:30:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305098711] [2023-08-24 09:30:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305098711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:30:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440652906] [2023-08-24 09:30:02,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:30:02,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:30:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:30:02,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:30:02,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 09:30:02,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:30:02,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:30:02,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-24 09:30:02,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:30:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:02,717 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 50 treesize of output 44 [2023-08-24 09:30:02,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:02,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 56 [2023-08-24 09:30:03,226 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 09:30:03,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:30:03,794 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~sum~0 c_~mts2~0))) (and (forall ((v_ArrVal_336 (Array Int Int)) (~M~0 Int)) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_336) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse0 (+ c_~sum~0 .cse1 c_~mts2~0))) (or (= .cse0 c_~mts1~0) (<= .cse0 0) (<= c_~N~0 ~M~0) (<= 0 (+ c_~mts3~0 .cse1)) (< (+ ~M~0 1) c_~N~0))))) (or (< c_~mts3~0 .cse2) (forall ((v_ArrVal_336 (Array Int Int)) (~M~0 Int)) (let ((.cse3 (+ c_~mts3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_336) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))))) (or (<= c_~N~0 ~M~0) (< .cse3 0) (= .cse3 c_~mts1~0) (< (+ ~M~0 1) c_~N~0))))) (or (forall ((v_ArrVal_336 (Array Int Int)) (~M~0 Int)) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_336) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (= (+ c_~sum~0 .cse4 c_~mts2~0) c_~mts1~0) (<= c_~N~0 ~M~0) (< (+ c_~mts3~0 .cse4) 0) (< (+ ~M~0 1) c_~N~0)))) (<= .cse2 c_~mts3~0)) (or (forall ((v_ArrVal_336 (Array Int Int)) (~M~0 Int)) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_336) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (<= c_~N~0 ~M~0) (<= 0 (+ c_~mts3~0 .cse5)) (< 0 (+ c_~sum~0 .cse5 c_~mts2~0)) (< (+ ~M~0 1) c_~N~0)))) (= c_~mts1~0 0)))) is different from false [2023-08-24 09:30:09,552 WARN L234 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:30:09,777 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:09,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 452 treesize of output 388 [2023-08-24 09:30:09,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 285 [2023-08-24 09:30:09,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 267 [2023-08-24 09:30:09,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 255 [2023-08-24 09:30:09,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 243 [2023-08-24 09:30:18,164 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:30:18,169 INFO L322 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-08-24 09:30:18,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 1 [2023-08-24 09:30:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 09:30:18,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440652906] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:30:18,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:30:18,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 31 [2023-08-24 09:30:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941931819] [2023-08-24 09:30:18,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:30:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 09:30:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:30:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 09:30:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=832, Unknown=1, NotChecked=60, Total=1056 [2023-08-24 09:30:18,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 424 [2023-08-24 09:30:18,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 379 transitions, 5022 flow. Second operand has 33 states, 33 states have (on average 119.18181818181819) internal successors, (3933), 33 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:18,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:30:18,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 424 [2023-08-24 09:30:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:30:21,067 INFO L124 PetriNetUnfolderBase]: 4682/7149 cut-off events. [2023-08-24 09:30:21,067 INFO L125 PetriNetUnfolderBase]: For 56398/56398 co-relation queries the response was YES. [2023-08-24 09:30:21,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43030 conditions, 7149 events. 4682/7149 cut-off events. For 56398/56398 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40557 event pairs, 759 based on Foata normal form. 2/7043 useless extension candidates. Maximal degree in co-relation 42871. Up to 3560 conditions per place. [2023-08-24 09:30:21,135 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 360 selfloop transitions, 358 changer transitions 9/727 dead transitions. [2023-08-24 09:30:21,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 727 transitions, 9888 flow [2023-08-24 09:30:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 09:30:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 09:30:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2941 transitions. [2023-08-24 09:30:21,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3015791632485644 [2023-08-24 09:30:21,141 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2941 transitions. [2023-08-24 09:30:21,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2941 transitions. [2023-08-24 09:30:21,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:30:21,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2941 transitions. [2023-08-24 09:30:21,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 127.8695652173913) internal successors, (2941), 23 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:21,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 424.0) internal successors, (10176), 24 states have internal predecessors, (10176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:21,157 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 424.0) internal successors, (10176), 24 states have internal predecessors, (10176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:21,157 INFO L175 Difference]: Start difference. First operand has 164 places, 379 transitions, 5022 flow. Second operand 23 states and 2941 transitions. [2023-08-24 09:30:21,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 727 transitions, 9888 flow [2023-08-24 09:30:21,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 727 transitions, 9574 flow, removed 105 selfloop flow, removed 3 redundant places. [2023-08-24 09:30:21,443 INFO L231 Difference]: Finished difference. Result has 194 places, 524 transitions, 7722 flow [2023-08-24 09:30:21,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=4791, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7722, PETRI_PLACES=194, PETRI_TRANSITIONS=524} [2023-08-24 09:30:21,444 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 162 predicate places. [2023-08-24 09:30:21,444 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 524 transitions, 7722 flow [2023-08-24 09:30:21,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 119.18181818181819) internal successors, (3933), 33 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:21,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:30:21,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:30:21,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 09:30:21,651 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 09:30:21,652 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:30:21,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:30:21,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1959066410, now seen corresponding path program 6 times [2023-08-24 09:30:21,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:30:21,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965315443] [2023-08-24 09:30:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:30:21,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:30:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:30:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:22,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:30:22,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965315443] [2023-08-24 09:30:22,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965315443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:30:22,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595224780] [2023-08-24 09:30:22,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:30:22,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:30:22,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:30:22,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:30:22,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 09:30:22,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:30:22,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:30:22,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 09:30:22,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:30:23,233 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:23,233 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 111 treesize of output 85 [2023-08-24 09:30:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:23,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:30:24,047 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:24,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 66 [2023-08-24 09:30:24,093 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:24,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 52 [2023-08-24 09:30:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595224780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:30:24,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:30:24,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2023-08-24 09:30:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390516368] [2023-08-24 09:30:24,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:30:24,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:30:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:30:24,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:30:24,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:30:24,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:30:24,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 524 transitions, 7722 flow. Second operand has 34 states, 34 states have (on average 123.11764705882354) internal successors, (4186), 34 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:24,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:30:24,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:30:24,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:30:26,597 INFO L124 PetriNetUnfolderBase]: 4775/7323 cut-off events. [2023-08-24 09:30:26,597 INFO L125 PetriNetUnfolderBase]: For 76714/76714 co-relation queries the response was YES. [2023-08-24 09:30:26,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48939 conditions, 7323 events. 4775/7323 cut-off events. For 76714/76714 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 41636 event pairs, 1438 based on Foata normal form. 1/7248 useless extension candidates. Maximal degree in co-relation 48753. Up to 6507 conditions per place. [2023-08-24 09:30:26,661 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 388 selfloop transitions, 227 changer transitions 6/621 dead transitions. [2023-08-24 09:30:26,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 621 transitions, 10007 flow [2023-08-24 09:30:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:30:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:30:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2175 transitions. [2023-08-24 09:30:26,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3017480577136515 [2023-08-24 09:30:26,665 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2175 transitions. [2023-08-24 09:30:26,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2175 transitions. [2023-08-24 09:30:26,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:30:26,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2175 transitions. [2023-08-24 09:30:26,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.94117647058823) internal successors, (2175), 17 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:26,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 424.0) internal successors, (7632), 18 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:26,675 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 424.0) internal successors, (7632), 18 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:26,675 INFO L175 Difference]: Start difference. First operand has 194 places, 524 transitions, 7722 flow. Second operand 17 states and 2175 transitions. [2023-08-24 09:30:26,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 621 transitions, 10007 flow [2023-08-24 09:30:27,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 621 transitions, 9687 flow, removed 145 selfloop flow, removed 5 redundant places. [2023-08-24 09:30:27,069 INFO L231 Difference]: Finished difference. Result has 210 places, 564 transitions, 8657 flow [2023-08-24 09:30:27,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=7412, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8657, PETRI_PLACES=210, PETRI_TRANSITIONS=564} [2023-08-24 09:30:27,070 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 178 predicate places. [2023-08-24 09:30:27,070 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 564 transitions, 8657 flow [2023-08-24 09:30:27,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 123.11764705882354) internal successors, (4186), 34 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:27,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:30:27,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:30:27,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 09:30:27,276 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,SelfDestructingSolverStorable8 [2023-08-24 09:30:27,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:30:27,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:30:27,277 INFO L85 PathProgramCache]: Analyzing trace with hash 988243200, now seen corresponding path program 7 times [2023-08-24 09:30:27,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:30:27,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697436974] [2023-08-24 09:30:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:30:27,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:30:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:30:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:28,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:30:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697436974] [2023-08-24 09:30:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697436974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:30:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940969176] [2023-08-24 09:30:28,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:30:28,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:30:28,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:30:28,300 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:30:28,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 09:30:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:30:28,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 09:30:28,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:30:28,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:30:28,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:30:28,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:30:28,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:28,831 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 14 treesize of output 16 [2023-08-24 09:30:29,147 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:30:29,148 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 107 treesize of output 73 [2023-08-24 09:30:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:29,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:30:30,946 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse17 (+ c_~sum~0 c_~mts2~0))) (let ((.cse22 (<= .cse17 c_~mts3~0)) (.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_428 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428))) (let ((.cse4 (+ c_~mts1~0 (select (select .cse3 c_~A~0.base) c_~A~0.offset)))) (or (forall ((v_ArrVal_429 (Array Int Int))) (let ((.cse1 (select (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~A~0.base))) (let ((.cse0 (select .cse1 .cse2))) (or (<= 0 (+ .cse0 c_~mts3~0)) (= (+ c_~mts1~0 (select .cse1 c_~A~0.offset)) 0) (< 0 (+ .cse0 c_~sum~0 c_~mts2~0)))))) (< 2147483647 .cse4) (< .cse4 0))))) (forall ((v_ArrVal_428 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428))) (let ((.cse5 (+ c_~mts1~0 (select (select .cse9 c_~A~0.base) c_~A~0.offset)))) (or (< 2147483647 .cse5) (< .cse5 0) (forall ((v_ArrVal_429 (Array Int Int))) (let ((.cse8 (select (store .cse9 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~A~0.base))) (let ((.cse6 (select .cse8 .cse2))) (let ((.cse7 (+ .cse6 c_~sum~0 c_~mts2~0))) (or (<= 0 (+ .cse6 c_~mts3~0)) (<= .cse7 0) (= .cse7 (+ c_~mts1~0 (select .cse8 c_~A~0.offset)))))))))))) (forall ((v_ArrVal_428 (Array Int Int))) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428))) (let ((.cse10 (select (select .cse12 c_~A~0.base) c_~A~0.offset))) (or (<= 0 (+ c_~mts1~0 .cse10)) (< (+ c_~mts1~0 .cse10 2147483648) 0) (forall ((v_ArrVal_429 (Array Int Int))) (let ((.cse11 (+ (select (select (store .cse12 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~A~0.base) .cse2) c_~mts3~0))) (or (= .cse11 0) (< .cse11 0)))))))) (or (forall ((v_ArrVal_429 (Array Int Int)) (v_ArrVal_428 (Array Int Int))) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428))) (let ((.cse15 (select (store .cse16 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~A~0.base))) (let ((.cse13 (+ c_~mts1~0 (select (select .cse16 c_~A~0.base) c_~A~0.offset))) (.cse14 (+ (select .cse15 .cse2) c_~mts3~0))) (or (< 2147483647 .cse13) (< .cse13 0) (< .cse14 0) (= (+ c_~mts1~0 (select .cse15 c_~A~0.offset)) .cse14)))))) (< c_~mts3~0 .cse17)) (or (forall ((v_ArrVal_429 (Array Int Int)) (v_ArrVal_428 (Array Int Int))) (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428))) (let ((.cse19 (select (store .cse21 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~A~0.base))) (let ((.cse20 (+ c_~mts1~0 (select (select .cse21 c_~A~0.base) c_~A~0.offset))) (.cse18 (select .cse19 .cse2))) (or (= (+ .cse18 c_~sum~0 c_~mts2~0) (+ c_~mts1~0 (select .cse19 c_~A~0.offset))) (< 2147483647 .cse20) (< .cse20 0) (< (+ .cse18 c_~mts3~0) 0)))))) .cse22) (or .cse22 (forall ((v_ArrVal_429 (Array Int Int)) (v_ArrVal_428 (Array Int Int))) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428))) (let ((.cse23 (select (select .cse24 c_~A~0.base) c_~A~0.offset))) (or (<= 0 (+ c_~mts1~0 .cse23)) (< (+ c_~mts1~0 .cse23 2147483648) 0) (< (+ (select (select (store .cse24 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~A~0.base) .cse2) c_~mts3~0) 0)))))) (forall ((v_ArrVal_428 (Array Int Int))) (let ((.cse27 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428))) (let ((.cse25 (select (select .cse27 c_~A~0.base) c_~A~0.offset))) (or (<= 0 (+ c_~mts1~0 .cse25)) (< (+ c_~mts1~0 .cse25 2147483648) 0) (forall ((v_ArrVal_429 (Array Int Int))) (let ((.cse26 (select (select (store .cse27 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~A~0.base) .cse2))) (or (<= 0 (+ .cse26 c_~mts3~0)) (<= (+ .cse26 c_~sum~0 c_~mts2~0) 0))))))))))) is different from false [2023-08-24 09:30:34,765 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:34,766 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 90 treesize of output 66 [2023-08-24 09:30:34,782 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:34,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1616 treesize of output 1544 [2023-08-24 09:30:34,811 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:34,811 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 130 treesize of output 128 [2023-08-24 09:30:34,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 122 [2023-08-24 09:30:34,841 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:34,841 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 125 treesize of output 113 [2023-08-24 09:30:35,341 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:35,342 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 186 treesize of output 126 [2023-08-24 09:30:35,357 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:35,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1206 treesize of output 1146 [2023-08-24 09:30:35,394 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:35,395 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 315 treesize of output 295 [2023-08-24 09:30:35,419 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:35,419 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 580 treesize of output 536 [2023-08-24 09:30:35,444 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:35,445 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 428 treesize of output 352 [2023-08-24 09:30:35,452 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 09:30:35,747 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:35,747 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 124 treesize of output 88 [2023-08-24 09:30:35,767 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:35,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2965 treesize of output 2829 [2023-08-24 09:30:35,796 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:35,796 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 203 treesize of output 195 [2023-08-24 09:30:35,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 243 [2023-08-24 09:30:35,852 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:35,852 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 191 treesize of output 167 [2023-08-24 09:30:37,213 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:37,213 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 151 treesize of output 103 [2023-08-24 09:30:37,218 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:30:37,227 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:37,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 267 [2023-08-24 09:30:37,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:37,241 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 118 [2023-08-24 09:30:37,255 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:37,255 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 239 treesize of output 207 [2023-08-24 09:30:37,353 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:37,354 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 150 treesize of output 102 [2023-08-24 09:30:37,361 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:30:37,370 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:37,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 263 [2023-08-24 09:30:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:37,392 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 115 [2023-08-24 09:30:37,406 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:37,406 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 233 treesize of output 201 [2023-08-24 09:30:37,522 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:37,522 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 154 treesize of output 106 [2023-08-24 09:30:37,530 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:30:37,541 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:37,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 308 [2023-08-24 09:30:37,563 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:37,564 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 304 treesize of output 272 [2023-08-24 09:30:37,587 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:37,588 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 141 treesize of output 127 [2023-08-24 09:30:37,697 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:30:37,698 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 125 treesize of output 1 [2023-08-24 09:30:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:37,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940969176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:30:37,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:30:37,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2023-08-24 09:30:37,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328560519] [2023-08-24 09:30:37,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:30:37,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:30:37,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:30:37,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:30:37,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=4, NotChecked=62, Total=1122 [2023-08-24 09:30:37,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:30:37,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 564 transitions, 8657 flow. Second operand has 34 states, 34 states have (on average 113.11764705882354) internal successors, (3846), 34 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:37,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:30:37,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:30:37,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:30:42,200 INFO L124 PetriNetUnfolderBase]: 5105/7812 cut-off events. [2023-08-24 09:30:42,200 INFO L125 PetriNetUnfolderBase]: For 78448/78448 co-relation queries the response was YES. [2023-08-24 09:30:42,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52399 conditions, 7812 events. 5105/7812 cut-off events. For 78448/78448 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44926 event pairs, 1310 based on Foata normal form. 3/7695 useless extension candidates. Maximal degree in co-relation 52203. Up to 6277 conditions per place. [2023-08-24 09:30:42,266 INFO L140 encePairwiseOnDemand]: 409/424 looper letters, 404 selfloop transitions, 334 changer transitions 13/751 dead transitions. [2023-08-24 09:30:42,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 751 transitions, 12355 flow [2023-08-24 09:30:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 09:30:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 09:30:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3437 transitions. [2023-08-24 09:30:42,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2795217957059206 [2023-08-24 09:30:42,272 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3437 transitions. [2023-08-24 09:30:42,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3437 transitions. [2023-08-24 09:30:42,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:30:42,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3437 transitions. [2023-08-24 09:30:42,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 118.51724137931035) internal successors, (3437), 29 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:42,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 424.0) internal successors, (12720), 30 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:42,286 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 424.0) internal successors, (12720), 30 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:42,286 INFO L175 Difference]: Start difference. First operand has 210 places, 564 transitions, 8657 flow. Second operand 29 states and 3437 transitions. [2023-08-24 09:30:42,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 751 transitions, 12355 flow [2023-08-24 09:30:42,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 751 transitions, 12126 flow, removed 112 selfloop flow, removed 2 redundant places. [2023-08-24 09:30:42,665 INFO L231 Difference]: Finished difference. Result has 245 places, 626 transitions, 10482 flow [2023-08-24 09:30:42,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=8450, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10482, PETRI_PLACES=245, PETRI_TRANSITIONS=626} [2023-08-24 09:30:42,666 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 213 predicate places. [2023-08-24 09:30:42,666 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 626 transitions, 10482 flow [2023-08-24 09:30:42,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 113.11764705882354) internal successors, (3846), 34 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:42,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:30:42,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:30:42,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 09:30:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 09:30:42,867 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:30:42,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:30:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1872527988, now seen corresponding path program 8 times [2023-08-24 09:30:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:30:42,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485892734] [2023-08-24 09:30:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:30:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:30:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:30:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:43,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:30:43,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485892734] [2023-08-24 09:30:43,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485892734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:30:43,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984863525] [2023-08-24 09:30:43,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:30:43,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:30:43,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:30:43,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:30:43,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 09:30:44,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:30:44,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:30:44,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 09:30:44,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:30:44,669 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:30:44,669 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 107 treesize of output 73 [2023-08-24 09:30:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:44,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:30:45,306 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:45,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 141 [2023-08-24 09:30:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:45,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984863525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:30:45,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:30:45,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2023-08-24 09:30:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20002838] [2023-08-24 09:30:45,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:30:45,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:30:45,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:30:45,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:30:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:30:45,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:30:45,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 626 transitions, 10482 flow. Second operand has 34 states, 34 states have (on average 123.11764705882354) internal successors, (4186), 34 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:45,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:30:45,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:30:45,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:30:48,426 INFO L124 PetriNetUnfolderBase]: 5159/7907 cut-off events. [2023-08-24 09:30:48,426 INFO L125 PetriNetUnfolderBase]: For 88160/88160 co-relation queries the response was YES. [2023-08-24 09:30:48,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55265 conditions, 7907 events. 5159/7907 cut-off events. For 88160/88160 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45608 event pairs, 1414 based on Foata normal form. 1/7904 useless extension candidates. Maximal degree in co-relation 55077. Up to 7074 conditions per place. [2023-08-24 09:30:48,485 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 431 selfloop transitions, 263 changer transitions 6/700 dead transitions. [2023-08-24 09:30:48,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 700 transitions, 12750 flow [2023-08-24 09:30:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 09:30:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 09:30:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1792 transitions. [2023-08-24 09:30:48,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3018867924528302 [2023-08-24 09:30:48,487 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1792 transitions. [2023-08-24 09:30:48,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1792 transitions. [2023-08-24 09:30:48,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:30:48,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1792 transitions. [2023-08-24 09:30:48,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.0) internal successors, (1792), 14 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:48,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:48,493 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:48,493 INFO L175 Difference]: Start difference. First operand has 245 places, 626 transitions, 10482 flow. Second operand 14 states and 1792 transitions. [2023-08-24 09:30:48,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 700 transitions, 12750 flow [2023-08-24 09:30:48,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 700 transitions, 12351 flow, removed 78 selfloop flow, removed 10 redundant places. [2023-08-24 09:30:48,903 INFO L231 Difference]: Finished difference. Result has 252 places, 654 transitions, 11230 flow [2023-08-24 09:30:48,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=10106, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11230, PETRI_PLACES=252, PETRI_TRANSITIONS=654} [2023-08-24 09:30:48,904 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 220 predicate places. [2023-08-24 09:30:48,905 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 654 transitions, 11230 flow [2023-08-24 09:30:48,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 123.11764705882354) internal successors, (4186), 34 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:48,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:30:48,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:30:48,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 09:30:49,111 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,SelfDestructingSolverStorable10 [2023-08-24 09:30:49,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:30:49,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:30:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -94448294, now seen corresponding path program 9 times [2023-08-24 09:30:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:30:49,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525571693] [2023-08-24 09:30:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:30:49,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:30:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:30:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:50,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:30:50,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525571693] [2023-08-24 09:30:50,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525571693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:30:50,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297617498] [2023-08-24 09:30:50,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:30:50,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:30:50,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:30:50,334 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:30:50,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 09:30:50,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:30:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:30:50,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-24 09:30:50,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:30:50,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:30:50,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:30:50,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:30:50,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:30:51,017 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:51,017 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 111 treesize of output 85 [2023-08-24 09:30:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:51,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:30:55,956 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:55,956 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 187 treesize of output 127 [2023-08-24 09:30:55,970 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:55,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1538 treesize of output 1482 [2023-08-24 09:30:56,002 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:56,002 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 710 treesize of output 678 [2023-08-24 09:30:56,021 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:56,022 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 670 treesize of output 598 [2023-08-24 09:30:56,086 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:56,087 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 303 treesize of output 291 [2023-08-24 09:30:57,127 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:57,128 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 09:30:57,140 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 581 treesize of output 561 [2023-08-24 09:30:57,168 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,168 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 557 treesize of output 497 [2023-08-24 09:30:57,201 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,201 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 493 treesize of output 465 [2023-08-24 09:30:57,238 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,238 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 237 treesize of output 225 [2023-08-24 09:30:57,248 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 09:30:57,598 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:57,598 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 218 treesize of output 146 [2023-08-24 09:30:57,614 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 808 treesize of output 772 [2023-08-24 09:30:57,643 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,644 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 761 treesize of output 661 [2023-08-24 09:30:57,675 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,676 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 629 treesize of output 581 [2023-08-24 09:30:57,732 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:57,732 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 296 treesize of output 274 [2023-08-24 09:30:58,017 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:58,017 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 156 treesize of output 108 [2023-08-24 09:30:58,035 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:58,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5157 treesize of output 4937 [2023-08-24 09:30:58,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:58,075 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 257 [2023-08-24 09:30:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:58,089 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 213 [2023-08-24 09:30:58,157 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:58,157 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 297 treesize of output 229 [2023-08-24 09:30:58,224 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:30:58,224 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 123 treesize of output 87 [2023-08-24 09:30:58,241 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:58,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1920 treesize of output 1844 [2023-08-24 09:30:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:58,268 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 196 [2023-08-24 09:30:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:30:58,281 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 163 [2023-08-24 09:30:58,322 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:30:58,323 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 196 treesize of output 176 [2023-08-24 09:30:58,395 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:30:58,395 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 97 treesize of output 1 [2023-08-24 09:30:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:30:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297617498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:30:58,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:30:58,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-08-24 09:30:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815203338] [2023-08-24 09:30:58,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:30:58,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 09:30:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:30:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 09:30:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1114, Unknown=26, NotChecked=0, Total=1406 [2023-08-24 09:30:58,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:30:58,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 654 transitions, 11230 flow. Second operand has 38 states, 38 states have (on average 112.8157894736842) internal successors, (4287), 38 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:30:58,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:30:58,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:30:58,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:31:07,750 INFO L124 PetriNetUnfolderBase]: 5230/8051 cut-off events. [2023-08-24 09:31:07,751 INFO L125 PetriNetUnfolderBase]: For 92616/92616 co-relation queries the response was YES. [2023-08-24 09:31:07,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57069 conditions, 8051 events. 5230/8051 cut-off events. For 92616/92616 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46966 event pairs, 1414 based on Foata normal form. 1/8050 useless extension candidates. Maximal degree in co-relation 56877. Up to 7074 conditions per place. [2023-08-24 09:31:07,988 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 441 selfloop transitions, 287 changer transitions 6/734 dead transitions. [2023-08-24 09:31:07,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 734 transitions, 13512 flow [2023-08-24 09:31:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:31:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:31:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2124 transitions. [2023-08-24 09:31:07,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2783018867924528 [2023-08-24 09:31:07,992 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2124 transitions. [2023-08-24 09:31:07,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2124 transitions. [2023-08-24 09:31:07,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:31:07,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2124 transitions. [2023-08-24 09:31:07,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.0) internal successors, (2124), 18 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:08,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:08,002 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:08,002 INFO L175 Difference]: Start difference. First operand has 252 places, 654 transitions, 11230 flow. Second operand 18 states and 2124 transitions. [2023-08-24 09:31:08,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 734 transitions, 13512 flow [2023-08-24 09:31:08,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 734 transitions, 13054 flow, removed 93 selfloop flow, removed 7 redundant places. [2023-08-24 09:31:08,611 INFO L231 Difference]: Finished difference. Result has 266 places, 672 transitions, 11814 flow [2023-08-24 09:31:08,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11814, PETRI_PLACES=266, PETRI_TRANSITIONS=672} [2023-08-24 09:31:08,612 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 234 predicate places. [2023-08-24 09:31:08,612 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 672 transitions, 11814 flow [2023-08-24 09:31:08,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 112.8157894736842) internal successors, (4287), 38 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:08,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:31:08,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:31:08,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 09:31:08,813 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,SelfDestructingSolverStorable11 [2023-08-24 09:31:08,814 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:31:08,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:31:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1668787672, now seen corresponding path program 10 times [2023-08-24 09:31:08,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:31:08,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804722139] [2023-08-24 09:31:08,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:31:08,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:31:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:31:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:09,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:31:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804722139] [2023-08-24 09:31:09,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804722139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:31:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864563268] [2023-08-24 09:31:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:31:09,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:31:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:31:09,683 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:31:09,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 09:31:09,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:31:09,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:31:09,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-24 09:31:09,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:31:09,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:31:09,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:31:09,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:31:10,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:31:10,383 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:10,383 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 111 treesize of output 85 [2023-08-24 09:31:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:10,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:31:14,245 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:14,245 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 09:31:14,257 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:14,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 581 treesize of output 565 [2023-08-24 09:31:14,288 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:14,288 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 285 treesize of output 277 [2023-08-24 09:31:14,306 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:14,306 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 541 treesize of output 485 [2023-08-24 09:31:14,324 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:14,324 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 477 treesize of output 453 [2023-08-24 09:31:15,619 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:15,619 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 123 treesize of output 87 [2023-08-24 09:31:15,632 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:15,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 944 treesize of output 908 [2023-08-24 09:31:15,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:15,655 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 196 [2023-08-24 09:31:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:15,671 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 193 [2023-08-24 09:31:15,691 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:15,691 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 388 treesize of output 344 [2023-08-24 09:31:15,823 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:15,823 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 218 treesize of output 146 [2023-08-24 09:31:15,850 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:15,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6842 treesize of output 6526 [2023-08-24 09:31:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:15,899 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 367 treesize of output 334 [2023-08-24 09:31:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:15,917 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 395 treesize of output 263 [2023-08-24 09:31:16,066 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:16,066 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 334 treesize of output 286 [2023-08-24 09:31:16,163 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:31:16,164 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 97 treesize of output 1 [2023-08-24 09:31:16,176 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:16,177 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 187 treesize of output 127 [2023-08-24 09:31:16,197 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:16,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 742 treesize of output 714 [2023-08-24 09:31:16,232 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:16,233 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 707 treesize of output 631 [2023-08-24 09:31:16,283 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:16,283 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 615 treesize of output 579 [2023-08-24 09:31:16,329 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:16,330 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 294 treesize of output 278 [2023-08-24 09:31:16,592 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:16,592 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 156 treesize of output 108 [2023-08-24 09:31:16,618 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:16,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5157 treesize of output 4937 [2023-08-24 09:31:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:16,658 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 257 [2023-08-24 09:31:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:16,683 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 213 [2023-08-24 09:31:16,715 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:16,715 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 297 treesize of output 229 [2023-08-24 09:31:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:16,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864563268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:31:16,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:31:16,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2023-08-24 09:31:16,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863031739] [2023-08-24 09:31:16,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:31:16,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 09:31:16,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:31:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 09:31:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=981, Unknown=25, NotChecked=0, Total=1260 [2023-08-24 09:31:16,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:31:16,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 672 transitions, 11814 flow. Second operand has 36 states, 36 states have (on average 112.91666666666667) internal successors, (4065), 36 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:16,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:31:16,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:31:16,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:31:29,516 WARN L234 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 230 DAG size of output: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:31:31,954 INFO L124 PetriNetUnfolderBase]: 5286/8162 cut-off events. [2023-08-24 09:31:31,955 INFO L125 PetriNetUnfolderBase]: For 97093/97093 co-relation queries the response was YES. [2023-08-24 09:31:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58769 conditions, 8162 events. 5286/8162 cut-off events. For 97093/97093 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47966 event pairs, 1436 based on Foata normal form. 1/8161 useless extension candidates. Maximal degree in co-relation 58545. Up to 7250 conditions per place. [2023-08-24 09:31:32,032 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 464 selfloop transitions, 282 changer transitions 6/752 dead transitions. [2023-08-24 09:31:32,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 752 transitions, 14129 flow [2023-08-24 09:31:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:31:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:31:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2008 transitions. [2023-08-24 09:31:32,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2785793562708102 [2023-08-24 09:31:32,035 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2008 transitions. [2023-08-24 09:31:32,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2008 transitions. [2023-08-24 09:31:32,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:31:32,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2008 transitions. [2023-08-24 09:31:32,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.11764705882354) internal successors, (2008), 17 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:32,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 424.0) internal successors, (7632), 18 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:32,043 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 424.0) internal successors, (7632), 18 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:32,043 INFO L175 Difference]: Start difference. First operand has 266 places, 672 transitions, 11814 flow. Second operand 17 states and 2008 transitions. [2023-08-24 09:31:32,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 752 transitions, 14129 flow [2023-08-24 09:31:32,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 752 transitions, 13699 flow, removed 89 selfloop flow, removed 7 redundant places. [2023-08-24 09:31:32,687 INFO L231 Difference]: Finished difference. Result has 281 places, 693 transitions, 12465 flow [2023-08-24 09:31:32,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12465, PETRI_PLACES=281, PETRI_TRANSITIONS=693} [2023-08-24 09:31:32,688 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 249 predicate places. [2023-08-24 09:31:32,688 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 693 transitions, 12465 flow [2023-08-24 09:31:32,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 112.91666666666667) internal successors, (4065), 36 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:32,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:31:32,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:31:32,693 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 09:31:32,889 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,SelfDestructingSolverStorable12 [2023-08-24 09:31:32,889 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:31:32,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:31:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1900338386, now seen corresponding path program 11 times [2023-08-24 09:31:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:31:32,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085489396] [2023-08-24 09:31:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:31:32,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:31:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:31:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:34,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:31:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085489396] [2023-08-24 09:31:34,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085489396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:31:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903006209] [2023-08-24 09:31:34,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:31:34,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:31:34,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:31:34,423 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:31:34,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 09:31:34,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:31:34,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:31:34,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 09:31:34,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:31:35,293 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:31:35,293 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 107 treesize of output 73 [2023-08-24 09:31:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:35,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:31:36,018 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:36,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 123 [2023-08-24 09:31:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903006209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:31:36,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:31:36,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 30 [2023-08-24 09:31:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336936433] [2023-08-24 09:31:36,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:31:36,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:31:36,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:31:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:31:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:31:36,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:31:36,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 693 transitions, 12465 flow. Second operand has 32 states, 32 states have (on average 113.25) internal successors, (3624), 32 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:36,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:31:36,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:31:36,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:31:40,545 INFO L124 PetriNetUnfolderBase]: 5488/8479 cut-off events. [2023-08-24 09:31:40,546 INFO L125 PetriNetUnfolderBase]: For 106410/106410 co-relation queries the response was YES. [2023-08-24 09:31:40,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62221 conditions, 8479 events. 5488/8479 cut-off events. For 106410/106410 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50252 event pairs, 1433 based on Foata normal form. 3/8480 useless extension candidates. Maximal degree in co-relation 62053. Up to 7269 conditions per place. [2023-08-24 09:31:40,614 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 488 selfloop transitions, 324 changer transitions 9/821 dead transitions. [2023-08-24 09:31:40,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 821 transitions, 15419 flow [2023-08-24 09:31:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 09:31:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 09:31:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3079 transitions. [2023-08-24 09:31:40,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.279299709724238 [2023-08-24 09:31:40,617 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3079 transitions. [2023-08-24 09:31:40,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3079 transitions. [2023-08-24 09:31:40,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:31:40,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3079 transitions. [2023-08-24 09:31:40,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 118.42307692307692) internal successors, (3079), 26 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:40,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 424.0) internal successors, (11448), 27 states have internal predecessors, (11448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:40,628 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 424.0) internal successors, (11448), 27 states have internal predecessors, (11448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:40,628 INFO L175 Difference]: Start difference. First operand has 281 places, 693 transitions, 12465 flow. Second operand 26 states and 3079 transitions. [2023-08-24 09:31:40,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 821 transitions, 15419 flow [2023-08-24 09:31:41,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 821 transitions, 15115 flow, removed 63 selfloop flow, removed 8 redundant places. [2023-08-24 09:31:41,154 INFO L231 Difference]: Finished difference. Result has 301 places, 729 transitions, 13497 flow [2023-08-24 09:31:41,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=12159, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13497, PETRI_PLACES=301, PETRI_TRANSITIONS=729} [2023-08-24 09:31:41,155 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 269 predicate places. [2023-08-24 09:31:41,155 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 729 transitions, 13497 flow [2023-08-24 09:31:41,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 113.25) internal successors, (3624), 32 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:41,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:31:41,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:31:41,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-24 09:31:41,356 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,SelfDestructingSolverStorable13 [2023-08-24 09:31:41,356 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:31:41,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:31:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash -631392944, now seen corresponding path program 12 times [2023-08-24 09:31:41,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:31:41,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068436105] [2023-08-24 09:31:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:31:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:31:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:31:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:42,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:31:42,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068436105] [2023-08-24 09:31:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068436105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:31:42,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285052071] [2023-08-24 09:31:42,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:31:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:31:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:31:42,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:31:42,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 09:31:42,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:31:42,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:31:42,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 09:31:42,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:31:43,009 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:31:43,009 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 107 treesize of output 73 [2023-08-24 09:31:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:43,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:31:43,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:43,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 77 [2023-08-24 09:31:43,847 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:43,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 68 [2023-08-24 09:31:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:44,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285052071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:31:44,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:31:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-24 09:31:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368907807] [2023-08-24 09:31:44,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:31:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:31:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:31:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:31:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2023-08-24 09:31:44,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:31:44,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 729 transitions, 13497 flow. Second operand has 29 states, 29 states have (on average 123.13793103448276) internal successors, (3571), 29 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:44,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:31:44,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:31:44,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:31:46,978 INFO L124 PetriNetUnfolderBase]: 5488/8478 cut-off events. [2023-08-24 09:31:46,978 INFO L125 PetriNetUnfolderBase]: For 109870/109870 co-relation queries the response was YES. [2023-08-24 09:31:47,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63390 conditions, 8478 events. 5488/8478 cut-off events. For 109870/109870 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50274 event pairs, 1478 based on Foata normal form. 1/8477 useless extension candidates. Maximal degree in co-relation 63192. Up to 7699 conditions per place. [2023-08-24 09:31:47,066 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 515 selfloop transitions, 250 changer transitions 6/771 dead transitions. [2023-08-24 09:31:47,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 771 transitions, 15355 flow [2023-08-24 09:31:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 09:31:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 09:31:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1790 transitions. [2023-08-24 09:31:47,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30154986522911054 [2023-08-24 09:31:47,076 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1790 transitions. [2023-08-24 09:31:47,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1790 transitions. [2023-08-24 09:31:47,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:31:47,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1790 transitions. [2023-08-24 09:31:47,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 127.85714285714286) internal successors, (1790), 14 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:47,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:47,089 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:47,090 INFO L175 Difference]: Start difference. First operand has 301 places, 729 transitions, 13497 flow. Second operand 14 states and 1790 transitions. [2023-08-24 09:31:47,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 771 transitions, 15355 flow [2023-08-24 09:31:47,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 771 transitions, 14659 flow, removed 134 selfloop flow, removed 12 redundant places. [2023-08-24 09:31:47,835 INFO L231 Difference]: Finished difference. Result has 302 places, 728 transitions, 13291 flow [2023-08-24 09:31:47,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=12791, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13291, PETRI_PLACES=302, PETRI_TRANSITIONS=728} [2023-08-24 09:31:47,836 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 270 predicate places. [2023-08-24 09:31:47,836 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 728 transitions, 13291 flow [2023-08-24 09:31:47,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 123.13793103448276) internal successors, (3571), 29 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:47,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:31:47,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:31:47,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 09:31:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:31:48,043 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:31:48,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:31:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1042334080, now seen corresponding path program 13 times [2023-08-24 09:31:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:31:48,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100332447] [2023-08-24 09:31:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:31:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:31:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:31:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:49,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:31:49,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100332447] [2023-08-24 09:31:49,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100332447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:31:49,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394612839] [2023-08-24 09:31:49,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:31:49,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:31:49,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:31:49,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:31:49,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 09:31:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:31:49,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 09:31:49,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:31:49,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:31:49,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:31:49,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:31:49,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:31:49,938 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:31:49,939 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 117 treesize of output 73 [2023-08-24 09:31:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:50,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:31:51,398 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_708 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse3 (select .cse1 c_~A~0.offset))) (let ((.cse0 (+ c_~mts1~0 .cse3))) (or (< 2147483647 .cse0) (< .cse0 0) (< (+ c_~sum~0 (select .cse1 .cse2) c_~mts2~0) (+ c_~mts1~0 .cse3 1))))))) (forall ((v_ArrVal_708 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse4 (+ c_~mts1~0 (select .cse5 c_~A~0.offset)))) (or (< 2147483647 .cse4) (< .cse4 0) (<= 0 (+ c_~mts3~0 (select .cse5 .cse2))) (= .cse4 0))))) (forall ((v_ArrVal_708 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse7 (+ c_~mts3~0 (select .cse8 .cse2))) (.cse6 (select .cse8 c_~A~0.offset))) (or (<= 0 (+ c_~mts1~0 .cse6)) (< .cse7 0) (= .cse7 0) (< (+ c_~mts1~0 .cse6 2147483648) 0))))) (forall ((v_ArrVal_708 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse10 (+ c_~mts3~0 (select .cse11 .cse2))) (.cse9 (+ c_~mts1~0 (select .cse11 c_~A~0.offset)))) (or (< 2147483647 .cse9) (< .cse9 0) (< .cse10 0) (= .cse10 .cse9))))) (forall ((v_ArrVal_708 (Array Int Int))) (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse12 (select .cse13 c_~A~0.offset))) (or (<= 0 (+ c_~mts1~0 .cse12)) (< (+ c_~sum~0 (select .cse13 .cse2) c_~mts2~0) 1) (< (+ c_~mts1~0 .cse12 2147483648) 0))))))) is different from false [2023-08-24 09:31:51,520 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_708 (Array Int Int)) (v_ArrVal_707 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_707) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse0 (+ (select .cse1 c_~A~0.offset) c_~mts1~0))) (or (= .cse0 0) (< 2147483647 .cse0) (< .cse0 0) (<= 0 (+ c_~mts3~0 (select .cse1 .cse2))))))) (forall ((v_ArrVal_708 (Array Int Int)) (v_ArrVal_707 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_707) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse3 (select .cse4 c_~A~0.offset))) (or (<= 0 (+ .cse3 c_~mts1~0)) (< (+ c_~sum~0 (select .cse4 .cse2) c_~mts2~0) 1) (< (+ .cse3 c_~mts1~0 2147483648) 0))))) (forall ((v_ArrVal_708 (Array Int Int)) (v_ArrVal_707 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_707) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse5 (select .cse7 c_~A~0.offset)) (.cse6 (+ c_~mts3~0 (select .cse7 .cse2)))) (or (<= 0 (+ .cse5 c_~mts1~0)) (< .cse6 0) (< (+ .cse5 c_~mts1~0 2147483648) 0) (= .cse6 0))))) (forall ((v_ArrVal_708 (Array Int Int)) (v_ArrVal_707 (Array Int Int))) (let ((.cse9 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_707) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse10 (select .cse9 c_~A~0.offset))) (let ((.cse8 (+ .cse10 c_~mts1~0))) (or (< 2147483647 .cse8) (< (+ c_~sum~0 (select .cse9 .cse2) c_~mts2~0) (+ .cse10 c_~mts1~0 1)) (< .cse8 0)))))) (forall ((v_ArrVal_708 (Array Int Int)) (v_ArrVal_707 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_707) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_708) c_~A~0.base))) (let ((.cse12 (+ c_~mts3~0 (select .cse13 .cse2))) (.cse11 (+ (select .cse13 c_~A~0.offset) c_~mts1~0))) (or (< 2147483647 .cse11) (< .cse12 0) (= .cse12 .cse11) (< .cse11 0))))))) is different from false [2023-08-24 09:31:52,089 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:52,089 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 125 treesize of output 89 [2023-08-24 09:31:52,105 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:52,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2293 treesize of output 2221 [2023-08-24 09:31:52,137 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:52,137 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 257 treesize of output 253 [2023-08-24 09:31:52,157 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:52,158 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 245 treesize of output 229 [2023-08-24 09:31:52,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:52,179 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 265 treesize of output 225 [2023-08-24 09:31:53,592 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:53,592 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 97 treesize of output 73 [2023-08-24 09:31:53,611 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:53,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1816 treesize of output 1756 [2023-08-24 09:31:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:53,641 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 194 [2023-08-24 09:31:53,659 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:53,660 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 404 treesize of output 368 [2023-08-24 09:31:53,691 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:53,691 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 191 treesize of output 175 [2023-08-24 09:31:53,860 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:53,860 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 09:31:53,878 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:53,878 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 581 treesize of output 561 [2023-08-24 09:31:53,907 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:53,907 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 557 treesize of output 529 [2023-08-24 09:31:53,934 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:53,935 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 525 treesize of output 465 [2023-08-24 09:31:53,970 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:53,970 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 237 treesize of output 225 [2023-08-24 09:31:53,977 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 09:31:54,465 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:54,466 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 156 treesize of output 108 [2023-08-24 09:31:54,491 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:54,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5157 treesize of output 4937 [2023-08-24 09:31:54,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:31:54,535 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 253 [2023-08-24 09:31:54,559 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:54,560 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 531 treesize of output 463 [2023-08-24 09:31:54,599 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:54,599 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 235 treesize of output 221 [2023-08-24 09:31:54,797 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:31:54,798 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 124 treesize of output 88 [2023-08-24 09:31:54,814 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:54,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 464 treesize of output 448 [2023-08-24 09:31:54,836 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:54,836 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 442 treesize of output 398 [2023-08-24 09:31:54,858 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:54,858 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 386 treesize of output 366 [2023-08-24 09:31:54,884 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:31:54,885 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 185 treesize of output 177 [2023-08-24 09:31:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:31:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394612839] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:31:55,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:31:55,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-24 09:31:55,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509562255] [2023-08-24 09:31:55,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:31:55,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 09:31:55,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:31:55,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 09:31:55,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=786, Unknown=2, NotChecked=118, Total=1056 [2023-08-24 09:31:55,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 424 [2023-08-24 09:31:55,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 728 transitions, 13291 flow. Second operand has 33 states, 33 states have (on average 117.0909090909091) internal successors, (3864), 33 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:55,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:31:55,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 424 [2023-08-24 09:31:55,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:31:59,101 INFO L124 PetriNetUnfolderBase]: 5577/8717 cut-off events. [2023-08-24 09:31:59,102 INFO L125 PetriNetUnfolderBase]: For 114461/114771 co-relation queries the response was YES. [2023-08-24 09:31:59,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65069 conditions, 8717 events. 5577/8717 cut-off events. For 114461/114771 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54236 event pairs, 1433 based on Foata normal form. 254/8894 useless extension candidates. Maximal degree in co-relation 64870. Up to 6855 conditions per place. [2023-08-24 09:31:59,202 INFO L140 encePairwiseOnDemand]: 412/424 looper letters, 491 selfloop transitions, 369 changer transitions 10/894 dead transitions. [2023-08-24 09:31:59,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 894 transitions, 17552 flow [2023-08-24 09:31:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:31:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:31:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2232 transitions. [2023-08-24 09:31:59,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29245283018867924 [2023-08-24 09:31:59,206 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2232 transitions. [2023-08-24 09:31:59,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2232 transitions. [2023-08-24 09:31:59,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:31:59,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2232 transitions. [2023-08-24 09:31:59,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:59,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:59,214 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:59,214 INFO L175 Difference]: Start difference. First operand has 302 places, 728 transitions, 13291 flow. Second operand 18 states and 2232 transitions. [2023-08-24 09:31:59,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 894 transitions, 17552 flow [2023-08-24 09:31:59,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 894 transitions, 16928 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-08-24 09:31:59,935 INFO L231 Difference]: Finished difference. Result has 312 places, 794 transitions, 15279 flow [2023-08-24 09:31:59,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=12779, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15279, PETRI_PLACES=312, PETRI_TRANSITIONS=794} [2023-08-24 09:31:59,936 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 280 predicate places. [2023-08-24 09:31:59,936 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 794 transitions, 15279 flow [2023-08-24 09:31:59,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 117.0909090909091) internal successors, (3864), 33 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:31:59,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:31:59,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:31:59,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 09:32:00,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 09:32:00,142 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:32:00,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:32:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1831714662, now seen corresponding path program 14 times [2023-08-24 09:32:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:32:00,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877065979] [2023-08-24 09:32:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:32:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:32:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:32:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:01,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:32:01,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877065979] [2023-08-24 09:32:01,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877065979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:32:01,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559927811] [2023-08-24 09:32:01,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:32:01,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:32:01,205 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:32:01,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 09:32:01,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:32:01,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:32:01,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 09:32:01,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:32:01,902 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:01,902 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 111 treesize of output 85 [2023-08-24 09:32:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:02,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:32:02,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:02,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 141 [2023-08-24 09:32:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559927811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:32:03,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:32:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 28 [2023-08-24 09:32:03,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145029594] [2023-08-24 09:32:03,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:32:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:32:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:32:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:32:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:32:03,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 424 [2023-08-24 09:32:03,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 794 transitions, 15279 flow. Second operand has 30 states, 30 states have (on average 121.3) internal successors, (3639), 30 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:03,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:32:03,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 424 [2023-08-24 09:32:03,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:32:07,088 INFO L124 PetriNetUnfolderBase]: 5789/9069 cut-off events. [2023-08-24 09:32:07,088 INFO L125 PetriNetUnfolderBase]: For 129263/129587 co-relation queries the response was YES. [2023-08-24 09:32:07,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69415 conditions, 9069 events. 5789/9069 cut-off events. For 129263/129587 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 57018 event pairs, 1564 based on Foata normal form. 265/9253 useless extension candidates. Maximal degree in co-relation 69184. Up to 7618 conditions per place. [2023-08-24 09:32:07,198 INFO L140 encePairwiseOnDemand]: 414/424 looper letters, 554 selfloop transitions, 289 changer transitions 3/870 dead transitions. [2023-08-24 09:32:07,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 870 transitions, 17731 flow [2023-08-24 09:32:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 09:32:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 09:32:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1911 transitions. [2023-08-24 09:32:07,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30047169811320756 [2023-08-24 09:32:07,201 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1911 transitions. [2023-08-24 09:32:07,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1911 transitions. [2023-08-24 09:32:07,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:32:07,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1911 transitions. [2023-08-24 09:32:07,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 127.4) internal successors, (1911), 15 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:07,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 424.0) internal successors, (6784), 16 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:07,208 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 424.0) internal successors, (6784), 16 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:07,208 INFO L175 Difference]: Start difference. First operand has 312 places, 794 transitions, 15279 flow. Second operand 15 states and 1911 transitions. [2023-08-24 09:32:07,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 870 transitions, 17731 flow [2023-08-24 09:32:07,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 870 transitions, 17533 flow, removed 73 selfloop flow, removed 6 redundant places. [2023-08-24 09:32:07,955 INFO L231 Difference]: Finished difference. Result has 325 places, 810 transitions, 16039 flow [2023-08-24 09:32:07,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=15081, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16039, PETRI_PLACES=325, PETRI_TRANSITIONS=810} [2023-08-24 09:32:07,956 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 293 predicate places. [2023-08-24 09:32:07,956 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 810 transitions, 16039 flow [2023-08-24 09:32:07,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 121.3) internal successors, (3639), 30 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:07,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:32:07,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:32:07,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 09:32:08,156 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,SelfDestructingSolverStorable16 [2023-08-24 09:32:08,157 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:32:08,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:32:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash 33221554, now seen corresponding path program 15 times [2023-08-24 09:32:08,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:32:08,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951487211] [2023-08-24 09:32:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:32:08,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:32:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:32:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:09,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:32:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951487211] [2023-08-24 09:32:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951487211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:32:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912724976] [2023-08-24 09:32:09,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:32:09,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:09,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:32:09,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:32:09,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 09:32:09,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:32:09,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:32:09,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 09:32:09,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:32:09,875 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:32:09,875 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 107 treesize of output 73 [2023-08-24 09:32:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:10,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:32:10,531 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:10,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 116 [2023-08-24 09:32:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:11,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912724976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:32:11,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:32:11,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 09:32:11,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992245173] [2023-08-24 09:32:11,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:32:11,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:32:11,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:32:11,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:32:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:32:11,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:32:11,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 810 transitions, 16039 flow. Second operand has 30 states, 30 states have (on average 123.06666666666666) internal successors, (3692), 30 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:11,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:32:11,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:32:11,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:32:14,817 INFO L124 PetriNetUnfolderBase]: 7123/10997 cut-off events. [2023-08-24 09:32:14,817 INFO L125 PetriNetUnfolderBase]: For 155902/155902 co-relation queries the response was YES. [2023-08-24 09:32:14,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85607 conditions, 10997 events. 7123/10997 cut-off events. For 155902/155902 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 68470 event pairs, 1382 based on Foata normal form. 2/10997 useless extension candidates. Maximal degree in co-relation 85367. Up to 9136 conditions per place. [2023-08-24 09:32:14,926 INFO L140 encePairwiseOnDemand]: 408/424 looper letters, 600 selfloop transitions, 529 changer transitions 6/1135 dead transitions. [2023-08-24 09:32:14,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1135 transitions, 23979 flow [2023-08-24 09:32:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:32:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:32:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2312 transitions. [2023-08-24 09:32:14,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3029350104821803 [2023-08-24 09:32:14,929 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2312 transitions. [2023-08-24 09:32:14,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2312 transitions. [2023-08-24 09:32:14,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:32:14,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2312 transitions. [2023-08-24 09:32:14,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 128.44444444444446) internal successors, (2312), 18 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:14,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:14,937 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:14,937 INFO L175 Difference]: Start difference. First operand has 325 places, 810 transitions, 16039 flow. Second operand 18 states and 2312 transitions. [2023-08-24 09:32:14,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1135 transitions, 23979 flow [2023-08-24 09:32:15,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1135 transitions, 23202 flow, removed 175 selfloop flow, removed 7 redundant places. [2023-08-24 09:32:15,926 INFO L231 Difference]: Finished difference. Result has 343 places, 1072 transitions, 22095 flow [2023-08-24 09:32:15,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=15523, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22095, PETRI_PLACES=343, PETRI_TRANSITIONS=1072} [2023-08-24 09:32:15,927 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 311 predicate places. [2023-08-24 09:32:15,927 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1072 transitions, 22095 flow [2023-08-24 09:32:15,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 123.06666666666666) internal successors, (3692), 30 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:15,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:32:15,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:32:15,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 09:32:16,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 09:32:16,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:32:16,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:32:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash 53634968, now seen corresponding path program 16 times [2023-08-24 09:32:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:32:16,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178765424] [2023-08-24 09:32:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:32:16,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:32:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:32:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:17,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:32:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178765424] [2023-08-24 09:32:17,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178765424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:32:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076119780] [2023-08-24 09:32:17,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:32:17,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:32:17,351 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:32:17,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 09:32:17,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:32:17,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:32:17,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 09:32:17,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:32:18,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 50 [2023-08-24 09:32:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:18,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:32:18,847 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:18,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 116 [2023-08-24 09:32:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076119780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:32:19,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:32:19,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-24 09:32:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125337982] [2023-08-24 09:32:19,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:32:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:32:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:32:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:32:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-08-24 09:32:19,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:32:19,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1072 transitions, 22095 flow. Second operand has 29 states, 29 states have (on average 123.13793103448276) internal successors, (3571), 29 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:19,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:32:19,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:32:19,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:32:24,204 INFO L124 PetriNetUnfolderBase]: 7857/12053 cut-off events. [2023-08-24 09:32:24,204 INFO L125 PetriNetUnfolderBase]: For 177209/177209 co-relation queries the response was YES. [2023-08-24 09:32:24,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100258 conditions, 12053 events. 7857/12053 cut-off events. For 177209/177209 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 75581 event pairs, 1368 based on Foata normal form. 2/12053 useless extension candidates. Maximal degree in co-relation 100034. Up to 9356 conditions per place. [2023-08-24 09:32:24,339 INFO L140 encePairwiseOnDemand]: 407/424 looper letters, 629 selfloop transitions, 713 changer transitions 6/1348 dead transitions. [2023-08-24 09:32:24,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1348 transitions, 29142 flow [2023-08-24 09:32:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 09:32:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 09:32:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3333 transitions. [2023-08-24 09:32:24,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3023403483309144 [2023-08-24 09:32:24,344 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3333 transitions. [2023-08-24 09:32:24,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3333 transitions. [2023-08-24 09:32:24,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:32:24,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3333 transitions. [2023-08-24 09:32:24,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 128.19230769230768) internal successors, (3333), 26 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:24,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 424.0) internal successors, (11448), 27 states have internal predecessors, (11448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:24,356 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 424.0) internal successors, (11448), 27 states have internal predecessors, (11448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:24,356 INFO L175 Difference]: Start difference. First operand has 343 places, 1072 transitions, 22095 flow. Second operand 26 states and 3333 transitions. [2023-08-24 09:32:24,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1348 transitions, 29142 flow [2023-08-24 09:32:25,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1348 transitions, 28501 flow, removed 316 selfloop flow, removed 3 redundant places. [2023-08-24 09:32:25,845 INFO L231 Difference]: Finished difference. Result has 374 places, 1257 transitions, 26957 flow [2023-08-24 09:32:25,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=21558, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26957, PETRI_PLACES=374, PETRI_TRANSITIONS=1257} [2023-08-24 09:32:25,846 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 342 predicate places. [2023-08-24 09:32:25,846 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1257 transitions, 26957 flow [2023-08-24 09:32:25,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 123.13793103448276) internal successors, (3571), 29 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:25,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:32:25,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:32:25,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 09:32:26,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:26,056 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:32:26,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:32:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash 221202406, now seen corresponding path program 17 times [2023-08-24 09:32:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:32:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456545594] [2023-08-24 09:32:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:32:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:32:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:32:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:27,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:32:27,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456545594] [2023-08-24 09:32:27,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456545594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:32:27,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801638822] [2023-08-24 09:32:27,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:32:27,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:27,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:32:27,028 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:32:27,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 09:32:27,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:32:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:32:27,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 09:32:27,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:32:27,876 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:32:27,877 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 107 treesize of output 73 [2023-08-24 09:32:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:28,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:32:28,567 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:28,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 115 [2023-08-24 09:32:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:29,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801638822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:32:29,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:32:29,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 26 [2023-08-24 09:32:29,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033863849] [2023-08-24 09:32:29,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:32:29,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 09:32:29,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:32:29,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 09:32:29,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2023-08-24 09:32:29,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 424 [2023-08-24 09:32:29,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1257 transitions, 26957 flow. Second operand has 28 states, 28 states have (on average 131.46428571428572) internal successors, (3681), 28 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:29,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:32:29,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 424 [2023-08-24 09:32:29,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:32:33,709 INFO L124 PetriNetUnfolderBase]: 7687/11779 cut-off events. [2023-08-24 09:32:33,709 INFO L125 PetriNetUnfolderBase]: For 212211/212782 co-relation queries the response was YES. [2023-08-24 09:32:33,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105510 conditions, 11779 events. 7687/11779 cut-off events. For 212211/212782 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 75273 event pairs, 1617 based on Foata normal form. 413/12101 useless extension candidates. Maximal degree in co-relation 105273. Up to 10314 conditions per place. [2023-08-24 09:32:33,842 INFO L140 encePairwiseOnDemand]: 414/424 looper letters, 828 selfloop transitions, 443 changer transitions 3/1298 dead transitions. [2023-08-24 09:32:33,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1298 transitions, 29987 flow [2023-08-24 09:32:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:32:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:32:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1377 transitions. [2023-08-24 09:32:33,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3247641509433962 [2023-08-24 09:32:33,845 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1377 transitions. [2023-08-24 09:32:33,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1377 transitions. [2023-08-24 09:32:33,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:32:33,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1377 transitions. [2023-08-24 09:32:33,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 137.7) internal successors, (1377), 10 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:33,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 424.0) internal successors, (4664), 11 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:33,849 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 424.0) internal successors, (4664), 11 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:33,849 INFO L175 Difference]: Start difference. First operand has 374 places, 1257 transitions, 26957 flow. Second operand 10 states and 1377 transitions. [2023-08-24 09:32:33,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1298 transitions, 29987 flow [2023-08-24 09:32:35,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1298 transitions, 28556 flow, removed 507 selfloop flow, removed 11 redundant places. [2023-08-24 09:32:35,326 INFO L231 Difference]: Finished difference. Result has 371 places, 1256 transitions, 26463 flow [2023-08-24 09:32:35,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=25577, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=26463, PETRI_PLACES=371, PETRI_TRANSITIONS=1256} [2023-08-24 09:32:35,327 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 339 predicate places. [2023-08-24 09:32:35,327 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1256 transitions, 26463 flow [2023-08-24 09:32:35,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 131.46428571428572) internal successors, (3681), 28 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:35,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:32:35,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:32:35,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-24 09:32:35,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:35,528 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:32:35,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:32:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash 65257944, now seen corresponding path program 18 times [2023-08-24 09:32:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:32:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694621408] [2023-08-24 09:32:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:32:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:32:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:32:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:36,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:32:36,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694621408] [2023-08-24 09:32:36,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694621408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:32:36,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091967655] [2023-08-24 09:32:36,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:32:36,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:32:36,949 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:32:36,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 09:32:37,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:32:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:32:37,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 09:32:37,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:32:37,857 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:32:37,857 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 111 treesize of output 77 [2023-08-24 09:32:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:38,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:32:38,909 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:38,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 122 [2023-08-24 09:32:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091967655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:32:39,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:32:39,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 36 [2023-08-24 09:32:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112582108] [2023-08-24 09:32:39,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:32:39,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 09:32:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:32:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 09:32:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 09:32:39,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:32:39,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1256 transitions, 26463 flow. Second operand has 38 states, 38 states have (on average 112.89473684210526) internal successors, (4290), 38 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:39,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:32:39,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:32:39,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:32:49,320 INFO L124 PetriNetUnfolderBase]: 9481/14438 cut-off events. [2023-08-24 09:32:49,320 INFO L125 PetriNetUnfolderBase]: For 267328/267328 co-relation queries the response was YES. [2023-08-24 09:32:49,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131093 conditions, 14438 events. 9481/14438 cut-off events. For 267328/267328 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 93074 event pairs, 1097 based on Foata normal form. 2/14438 useless extension candidates. Maximal degree in co-relation 130857. Up to 9079 conditions per place. [2023-08-24 09:32:49,478 INFO L140 encePairwiseOnDemand]: 407/424 looper letters, 584 selfloop transitions, 1417 changer transitions 11/2012 dead transitions. [2023-08-24 09:32:49,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2012 transitions, 43490 flow [2023-08-24 09:32:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:32:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:32:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4239 transitions. [2023-08-24 09:32:49,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2777122641509434 [2023-08-24 09:32:49,482 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4239 transitions. [2023-08-24 09:32:49,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4239 transitions. [2023-08-24 09:32:49,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:32:49,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4239 transitions. [2023-08-24 09:32:49,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 117.75) internal successors, (4239), 36 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:49,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 424.0) internal successors, (15688), 37 states have internal predecessors, (15688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:49,493 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 424.0) internal successors, (15688), 37 states have internal predecessors, (15688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:49,493 INFO L175 Difference]: Start difference. First operand has 371 places, 1256 transitions, 26463 flow. Second operand 36 states and 4239 transitions. [2023-08-24 09:32:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2012 transitions, 43490 flow [2023-08-24 09:32:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 2012 transitions, 42606 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 09:32:51,172 INFO L231 Difference]: Finished difference. Result has 413 places, 1805 transitions, 42045 flow [2023-08-24 09:32:51,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=25686, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=913, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=42045, PETRI_PLACES=413, PETRI_TRANSITIONS=1805} [2023-08-24 09:32:51,174 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 381 predicate places. [2023-08-24 09:32:51,174 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 1805 transitions, 42045 flow [2023-08-24 09:32:51,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 112.89473684210526) internal successors, (4290), 38 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:32:51,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:32:51,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:32:51,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 09:32:51,381 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,SelfDestructingSolverStorable20 [2023-08-24 09:32:51,381 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:32:51,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:32:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2124885350, now seen corresponding path program 19 times [2023-08-24 09:32:51,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:32:51,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910958420] [2023-08-24 09:32:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:32:51,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:32:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:32:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:52,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:32:52,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910958420] [2023-08-24 09:32:52,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910958420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:32:52,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292692606] [2023-08-24 09:32:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:32:52,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:32:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:32:52,325 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:32:52,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 09:32:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:32:52,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 09:32:52,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:32:52,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:32:52,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:32:52,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:32:52,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:32:53,195 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:53,195 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 121 treesize of output 85 [2023-08-24 09:32:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:32:53,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:32:59,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:59,676 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 158 treesize of output 110 [2023-08-24 09:32:59,691 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:59,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1289 treesize of output 1241 [2023-08-24 09:32:59,719 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:59,719 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 595 treesize of output 567 [2023-08-24 09:32:59,739 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:59,740 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 559 treesize of output 495 [2023-08-24 09:32:59,763 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:32:59,763 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 251 treesize of output 241 [2023-08-24 09:33:00,621 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:00,621 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 156 treesize of output 108 [2023-08-24 09:33:00,638 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:00,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 607 treesize of output 587 [2023-08-24 09:33:00,660 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:00,661 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 579 treesize of output 515 [2023-08-24 09:33:00,682 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:00,682 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 507 treesize of output 479 [2023-08-24 09:33:00,706 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:00,707 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 233 [2023-08-24 09:33:02,238 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:02,239 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 95 treesize of output 71 [2023-08-24 09:33:02,259 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:33:02,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1752 treesize of output 1692 [2023-08-24 09:33:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:33:02,289 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 186 [2023-08-24 09:33:02,308 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:33:02,308 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 388 treesize of output 352 [2023-08-24 09:33:02,335 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:33:02,335 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 183 treesize of output 167 [2023-08-24 09:33:02,528 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:33:02,528 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 1 [2023-08-24 09:33:02,539 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:02,539 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 125 treesize of output 89 [2023-08-24 09:33:02,559 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:33:02,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1125 treesize of output 1089 [2023-08-24 09:33:02,594 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:33:02,594 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 521 treesize of output 477 [2023-08-24 09:33:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:33:02,617 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 221 [2023-08-24 09:33:02,645 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:33:02,646 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 241 treesize of output 221 [2023-08-24 09:33:02,930 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 09:33:02,941 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:33:02,941 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 1 [2023-08-24 09:33:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:03,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292692606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:03,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:03,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-08-24 09:33:03,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475810794] [2023-08-24 09:33:03,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:03,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 09:33:03,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 09:33:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1218, Unknown=30, NotChecked=0, Total=1482 [2023-08-24 09:33:03,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:33:03,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 1805 transitions, 42045 flow. Second operand has 39 states, 39 states have (on average 112.84615384615384) internal successors, (4401), 39 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:03,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:03,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:33:03,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:24,986 WARN L234 SmtUtils]: Spent 15.86s on a formula simplification. DAG size of input: 239 DAG size of output: 151 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:33:28,871 INFO L124 PetriNetUnfolderBase]: 9555/14579 cut-off events. [2023-08-24 09:33:28,872 INFO L125 PetriNetUnfolderBase]: For 338256/338256 co-relation queries the response was YES. [2023-08-24 09:33:28,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146287 conditions, 14579 events. 9555/14579 cut-off events. For 338256/338256 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 93714 event pairs, 1712 based on Foata normal form. 1/14580 useless extension candidates. Maximal degree in co-relation 146081. Up to 13015 conditions per place. [2023-08-24 09:33:29,076 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 1286 selfloop transitions, 594 changer transitions 6/1886 dead transitions. [2023-08-24 09:33:29,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 1886 transitions, 46926 flow [2023-08-24 09:33:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 09:33:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 09:33:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2467 transitions. [2023-08-24 09:33:29,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27706648697214736 [2023-08-24 09:33:29,079 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2467 transitions. [2023-08-24 09:33:29,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2467 transitions. [2023-08-24 09:33:29,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:29,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2467 transitions. [2023-08-24 09:33:29,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 117.47619047619048) internal successors, (2467), 21 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:29,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 424.0) internal successors, (9328), 22 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:29,086 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 424.0) internal successors, (9328), 22 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:29,086 INFO L175 Difference]: Start difference. First operand has 413 places, 1805 transitions, 42045 flow. Second operand 21 states and 2467 transitions. [2023-08-24 09:33:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 1886 transitions, 46926 flow [2023-08-24 09:33:32,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1886 transitions, 45370 flow, removed 719 selfloop flow, removed 5 redundant places. [2023-08-24 09:33:32,729 INFO L231 Difference]: Finished difference. Result has 431 places, 1825 transitions, 42380 flow [2023-08-24 09:33:32,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=40563, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=42380, PETRI_PLACES=431, PETRI_TRANSITIONS=1825} [2023-08-24 09:33:32,731 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 399 predicate places. [2023-08-24 09:33:32,731 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1825 transitions, 42380 flow [2023-08-24 09:33:32,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 112.84615384615384) internal successors, (4401), 39 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:32,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:32,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:32,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 09:33:32,937 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,SelfDestructingSolverStorable21 [2023-08-24 09:33:32,937 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:33:32,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1739882344, now seen corresponding path program 20 times [2023-08-24 09:33:32,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:32,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692123426] [2023-08-24 09:33:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:32,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:33,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:33,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692123426] [2023-08-24 09:33:33,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692123426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:33:33,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017852174] [2023-08-24 09:33:33,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:33:33,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:33,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:33,806 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:33:33,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 09:33:33,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:33:33,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:33:33,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 09:33:33,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:33:34,647 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-24 09:33:34,648 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 107 treesize of output 73 [2023-08-24 09:33:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:34,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:33:35,405 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:35,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 115 [2023-08-24 09:33:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:36,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017852174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:36,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:36,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2023-08-24 09:33:36,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619245464] [2023-08-24 09:33:36,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:36,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:33:36,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:36,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:33:36,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:33:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:33:36,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1825 transitions, 42380 flow. Second operand has 34 states, 34 states have (on average 123.11764705882354) internal successors, (4186), 34 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:36,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:36,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:33:36,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:43,071 INFO L124 PetriNetUnfolderBase]: 9558/14593 cut-off events. [2023-08-24 09:33:43,071 INFO L125 PetriNetUnfolderBase]: For 323680/323680 co-relation queries the response was YES. [2023-08-24 09:33:43,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144717 conditions, 14593 events. 9558/14593 cut-off events. For 323680/323680 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 93931 event pairs, 1732 based on Foata normal form. 1/14594 useless extension candidates. Maximal degree in co-relation 144416. Up to 13184 conditions per place. [2023-08-24 09:33:43,248 INFO L140 encePairwiseOnDemand]: 411/424 looper letters, 1303 selfloop transitions, 555 changer transitions 6/1864 dead transitions. [2023-08-24 09:33:43,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1864 transitions, 46518 flow [2023-08-24 09:33:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 09:33:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 09:33:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1789 transitions. [2023-08-24 09:33:43,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3013814016172507 [2023-08-24 09:33:43,250 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1789 transitions. [2023-08-24 09:33:43,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1789 transitions. [2023-08-24 09:33:43,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:43,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1789 transitions. [2023-08-24 09:33:43,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 127.78571428571429) internal successors, (1789), 14 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:43,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:43,255 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:43,255 INFO L175 Difference]: Start difference. First operand has 431 places, 1825 transitions, 42380 flow. Second operand 14 states and 1789 transitions. [2023-08-24 09:33:43,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1864 transitions, 46518 flow [2023-08-24 09:33:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 1864 transitions, 45591 flow, removed 161 selfloop flow, removed 10 redundant places. [2023-08-24 09:33:46,032 INFO L231 Difference]: Finished difference. Result has 435 places, 1826 transitions, 42611 flow [2023-08-24 09:33:46,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=41475, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=42611, PETRI_PLACES=435, PETRI_TRANSITIONS=1826} [2023-08-24 09:33:46,033 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 403 predicate places. [2023-08-24 09:33:46,033 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 1826 transitions, 42611 flow [2023-08-24 09:33:46,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 123.11764705882354) internal successors, (4186), 34 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:46,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:46,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:46,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 09:33:46,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:46,242 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:33:46,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash -130098670, now seen corresponding path program 21 times [2023-08-24 09:33:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179919919] [2023-08-24 09:33:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:47,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:47,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179919919] [2023-08-24 09:33:47,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179919919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:33:47,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171605030] [2023-08-24 09:33:47,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:33:47,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:47,481 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:33:47,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 09:33:47,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:33:47,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:33:47,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 09:33:47,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:33:48,256 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:48,256 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 111 treesize of output 85 [2023-08-24 09:33:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:48,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:33:49,605 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:33:49,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 123 [2023-08-24 09:33:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:50,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171605030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:50,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:50,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2023-08-24 09:33:50,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031803355] [2023-08-24 09:33:50,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:33:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:33:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:33:50,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:33:50,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 1826 transitions, 42611 flow. Second operand has 32 states, 32 states have (on average 113.1875) internal successors, (3622), 32 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:50,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:50,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:33:50,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:01,286 INFO L124 PetriNetUnfolderBase]: 9834/15022 cut-off events. [2023-08-24 09:34:01,286 INFO L125 PetriNetUnfolderBase]: For 329044/329044 co-relation queries the response was YES. [2023-08-24 09:34:01,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150023 conditions, 15022 events. 9834/15022 cut-off events. For 329044/329044 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 97963 event pairs, 1166 based on Foata normal form. 3/15025 useless extension candidates. Maximal degree in co-relation 149750. Up to 10160 conditions per place. [2023-08-24 09:34:01,473 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 741 selfloop transitions, 1369 changer transitions 9/2119 dead transitions. [2023-08-24 09:34:01,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 2119 transitions, 51767 flow [2023-08-24 09:34:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 09:34:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 09:34:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4926 transitions. [2023-08-24 09:34:01,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27661725067385445 [2023-08-24 09:34:01,479 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4926 transitions. [2023-08-24 09:34:01,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4926 transitions. [2023-08-24 09:34:01,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:01,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4926 transitions. [2023-08-24 09:34:01,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 117.28571428571429) internal successors, (4926), 42 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 424.0) internal successors, (18232), 43 states have internal predecessors, (18232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,497 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 424.0) internal successors, (18232), 43 states have internal predecessors, (18232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,497 INFO L175 Difference]: Start difference. First operand has 435 places, 1826 transitions, 42611 flow. Second operand 42 states and 4926 transitions. [2023-08-24 09:34:01,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 2119 transitions, 51767 flow [2023-08-24 09:34:04,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2119 transitions, 50748 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-24 09:34:04,768 INFO L231 Difference]: Finished difference. Result has 471 places, 1920 transitions, 48600 flow [2023-08-24 09:34:04,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=41583, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=48600, PETRI_PLACES=471, PETRI_TRANSITIONS=1920} [2023-08-24 09:34:04,770 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 439 predicate places. [2023-08-24 09:34:04,770 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1920 transitions, 48600 flow [2023-08-24 09:34:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 113.1875) internal successors, (3622), 32 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:04,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:04,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 09:34:04,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:04,971 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:34:04,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash -478362468, now seen corresponding path program 22 times [2023-08-24 09:34:04,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:04,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666733548] [2023-08-24 09:34:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:04,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666733548] [2023-08-24 09:34:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666733548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787072996] [2023-08-24 09:34:05,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:34:05,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:05,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:05,889 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:34:05,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 09:34:06,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:34:06,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:06,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 09:34:06,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:06,521 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:34:06,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 50 [2023-08-24 09:34:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:06,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:07,677 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:34:07,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 141 [2023-08-24 09:34:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:08,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787072996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:08,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:08,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 30 [2023-08-24 09:34:08,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900095409] [2023-08-24 09:34:08,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:08,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:34:08,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:08,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:34:08,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:34:08,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 424 [2023-08-24 09:34:08,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1920 transitions, 48600 flow. Second operand has 32 states, 32 states have (on average 123.25) internal successors, (3944), 32 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:08,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:08,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 424 [2023-08-24 09:34:08,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:28,217 INFO L124 PetriNetUnfolderBase]: 12812/19618 cut-off events. [2023-08-24 09:34:28,218 INFO L125 PetriNetUnfolderBase]: For 556173/556173 co-relation queries the response was YES. [2023-08-24 09:34:28,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210254 conditions, 19618 events. 12812/19618 cut-off events. For 556173/556173 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 133273 event pairs, 1574 based on Foata normal form. 3/19621 useless extension candidates. Maximal degree in co-relation 209868. Up to 12197 conditions per place. [2023-08-24 09:34:28,509 INFO L140 encePairwiseOnDemand]: 407/424 looper letters, 1128 selfloop transitions, 1998 changer transitions 19/3145 dead transitions. [2023-08-24 09:34:28,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 3145 transitions, 82079 flow [2023-08-24 09:34:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-24 09:34:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-24 09:34:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 10651 transitions. [2023-08-24 09:34:28,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30265401227551714 [2023-08-24 09:34:28,520 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 10651 transitions. [2023-08-24 09:34:28,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 10651 transitions. [2023-08-24 09:34:28,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:28,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 10651 transitions. [2023-08-24 09:34:28,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 128.32530120481928) internal successors, (10651), 83 states have internal predecessors, (10651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:28,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 424.0) internal successors, (35616), 84 states have internal predecessors, (35616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:28,559 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 424.0) internal successors, (35616), 84 states have internal predecessors, (35616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:28,559 INFO L175 Difference]: Start difference. First operand has 471 places, 1920 transitions, 48600 flow. Second operand 83 states and 10651 transitions. [2023-08-24 09:34:28,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 3145 transitions, 82079 flow [2023-08-24 09:34:35,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 3145 transitions, 76312 flow, removed 1881 selfloop flow, removed 33 redundant places. [2023-08-24 09:34:35,265 INFO L231 Difference]: Finished difference. Result has 550 places, 2821 transitions, 73336 flow [2023-08-24 09:34:35,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=45622, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=73336, PETRI_PLACES=550, PETRI_TRANSITIONS=2821} [2023-08-24 09:34:35,266 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 518 predicate places. [2023-08-24 09:34:35,266 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 2821 transitions, 73336 flow [2023-08-24 09:34:35,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 123.25) internal successors, (3944), 32 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:35,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:35,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:35,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 09:34:35,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 09:34:35,468 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:34:35,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash 154774955, now seen corresponding path program 23 times [2023-08-24 09:34:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:35,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69427020] [2023-08-24 09:34:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:35,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:35,564 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 09:34:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69427020] [2023-08-24 09:34:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69427020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312586033] [2023-08-24 09:34:35,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:34:35,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:35,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:35,569 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 09:34:35,573 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 09:34:35,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:34:35,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:35,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:34:35,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:35,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312586033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:35,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:35,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 09:34:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206387956] [2023-08-24 09:34:35,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:35,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:34:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:34:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:34:35,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 424 [2023-08-24 09:34:35,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 2821 transitions, 73336 flow. Second operand has 14 states, 14 states have (on average 166.64285714285714) internal successors, (2333), 14 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:35,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:35,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 424 [2023-08-24 09:34:35,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:47,824 INFO L124 PetriNetUnfolderBase]: 13629/20383 cut-off events. [2023-08-24 09:34:47,825 INFO L125 PetriNetUnfolderBase]: For 789090/790496 co-relation queries the response was YES. [2023-08-24 09:34:48,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244681 conditions, 20383 events. 13629/20383 cut-off events. For 789090/790496 co-relation queries the response was YES. Maximal size of possible extension queue 1449. Compared 139961 event pairs, 2000 based on Foata normal form. 1207/21250 useless extension candidates. Maximal degree in co-relation 244332. Up to 8440 conditions per place. [2023-08-24 09:34:48,278 INFO L140 encePairwiseOnDemand]: 417/424 looper letters, 2331 selfloop transitions, 910 changer transitions 0/3340 dead transitions. [2023-08-24 09:34:48,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 3340 transitions, 93581 flow [2023-08-24 09:34:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:34:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:34:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1733 transitions. [2023-08-24 09:34:48,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087264150943396 [2023-08-24 09:34:48,281 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1733 transitions. [2023-08-24 09:34:48,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1733 transitions. [2023-08-24 09:34:48,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:48,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1733 transitions. [2023-08-24 09:34:48,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 173.3) internal successors, (1733), 10 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:48,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 424.0) internal successors, (4664), 11 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:48,285 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 424.0) internal successors, (4664), 11 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:48,285 INFO L175 Difference]: Start difference. First operand has 550 places, 2821 transitions, 73336 flow. Second operand 10 states and 1733 transitions. [2023-08-24 09:34:48,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 3340 transitions, 93581 flow [2023-08-24 09:34:59,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 3340 transitions, 84423 flow, removed 4435 selfloop flow, removed 11 redundant places. [2023-08-24 09:34:59,756 INFO L231 Difference]: Finished difference. Result has 550 places, 2832 transitions, 70218 flow [2023-08-24 09:34:59,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=65040, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=70218, PETRI_PLACES=550, PETRI_TRANSITIONS=2832} [2023-08-24 09:34:59,758 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 518 predicate places. [2023-08-24 09:34:59,758 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 2832 transitions, 70218 flow [2023-08-24 09:34:59,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 166.64285714285714) internal successors, (2333), 14 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:59,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:59,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:59,767 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 09:34:59,964 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,SelfDestructingSolverStorable25 [2023-08-24 09:34:59,965 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 09:34:59,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1363465428, now seen corresponding path program 24 times [2023-08-24 09:34:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004434662] [2023-08-24 09:34:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:35:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:35:00,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:35:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004434662] [2023-08-24 09:35:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004434662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:35:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609188620] [2023-08-24 09:35:00,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:35:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:35:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:35:00,957 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 09:35:00,959 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 09:35:01,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:35:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:35:01,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-24 09:35:01,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:35:01,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:35:01,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:35:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:35:01,448 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 14 treesize of output 16 [2023-08-24 09:35:01,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:35:01,667 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 50 treesize of output 44 [2023-08-24 09:35:01,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:01,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 56 [2023-08-24 09:35:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:35:02,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:35:02,848 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1206 (Array Int Int)) (~M~0 Int)) (or (< (+ c_~mts3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1206) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) 0) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (< (+ c_~sum~0 c_~mts2~0) (+ c_~mts3~0 1))) (or (forall ((v_ArrVal_1206 (Array Int Int)) (~M~0 Int)) (or (<= c_~N~0 ~M~0) (<= 0 (+ c_~mts3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1206) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (< (+ ~M~0 1) c_~N~0))) (= c_~mts1~0 0)) (forall ((v_ArrVal_1206 (Array Int Int)) (~M~0 Int)) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1206) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (< (+ c_~sum~0 .cse0 c_~mts2~0) 1) (<= c_~N~0 ~M~0) (<= 0 (+ c_~mts3~0 .cse0)) (< (+ ~M~0 1) c_~N~0)))) (forall ((v_ArrVal_1206 (Array Int Int)) (~M~0 Int)) (let ((.cse1 (+ c_~mts3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1206) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))))) (or (= c_~mts1~0 .cse1) (< .cse1 0) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))))) is different from false [2023-08-24 09:35:07,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:07,188 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 110 treesize of output 74 [2023-08-24 09:35:07,201 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:07,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1529 treesize of output 1457 [2023-08-24 09:35:07,223 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:07,223 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 123 treesize of output 119 [2023-08-24 09:35:07,240 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:07,241 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 96 treesize of output 88 [2023-08-24 09:35:07,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 54 [2023-08-24 09:35:07,611 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:07,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 82 [2023-08-24 09:35:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:07,624 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:07,625 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2023-08-24 09:35:07,650 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:07,650 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 54 treesize of output 42 [2023-08-24 09:35:07,681 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:07,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 59 [2023-08-24 09:35:07,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:07,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:07,697 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:07,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 72 [2023-08-24 09:35:07,718 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:07,718 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 38 treesize of output 32 [2023-08-24 09:35:07,738 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:07,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 93 [2023-08-24 09:35:07,744 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:07,745 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:07,757 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:07,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 145 [2023-08-24 09:35:07,787 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:07,788 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 57 treesize of output 43 [2023-08-24 09:35:07,813 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:35:07,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 1 [2023-08-24 09:35:07,831 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:35:07,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 1 [2023-08-24 09:35:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 09:35:07,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609188620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:35:07,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:35:07,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 32 [2023-08-24 09:35:07,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006937799] [2023-08-24 09:35:07,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:35:07,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:35:07,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:35:07,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:35:07,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=892, Unknown=5, NotChecked=62, Total=1122 [2023-08-24 09:35:07,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 424 [2023-08-24 09:35:07,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 2832 transitions, 70218 flow. Second operand has 34 states, 34 states have (on average 121.02941176470588) internal successors, (4115), 34 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:07,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:35:07,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 424 [2023-08-24 09:35:07,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:35:22,294 INFO L124 PetriNetUnfolderBase]: 14315/21426 cut-off events. [2023-08-24 09:35:22,294 INFO L125 PetriNetUnfolderBase]: For 696203/697107 co-relation queries the response was YES. [2023-08-24 09:35:22,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242880 conditions, 21426 events. 14315/21426 cut-off events. For 696203/697107 co-relation queries the response was YES. Maximal size of possible extension queue 1453. Compared 146338 event pairs, 1604 based on Foata normal form. 682/21986 useless extension candidates. Maximal degree in co-relation 242508. Up to 15921 conditions per place. [2023-08-24 09:35:22,671 INFO L140 encePairwiseOnDemand]: 413/424 looper letters, 1971 selfloop transitions, 989 changer transitions 3/2989 dead transitions. [2023-08-24 09:35:22,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 2989 transitions, 79611 flow [2023-08-24 09:35:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:35:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:35:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1656 transitions. [2023-08-24 09:35:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30043541364296084 [2023-08-24 09:35:22,674 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1656 transitions. [2023-08-24 09:35:22,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1656 transitions. [2023-08-24 09:35:22,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:35:22,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1656 transitions. [2023-08-24 09:35:22,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 127.38461538461539) internal successors, (1656), 13 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:22,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 424.0) internal successors, (5936), 14 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:22,678 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 424.0) internal successors, (5936), 14 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:22,678 INFO L175 Difference]: Start difference. First operand has 550 places, 2832 transitions, 70218 flow. Second operand 13 states and 1656 transitions. [2023-08-24 09:35:22,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 2989 transitions, 79611 flow [2023-08-24 09:35:32,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2989 transitions, 79450 flow, removed 26 selfloop flow, removed 8 redundant places. [2023-08-24 09:35:32,541 INFO L231 Difference]: Finished difference. Result has 559 places, 2909 transitions, 75614 flow [2023-08-24 09:35:32,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=70063, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=926, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=75614, PETRI_PLACES=559, PETRI_TRANSITIONS=2909} [2023-08-24 09:35:32,544 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 527 predicate places. [2023-08-24 09:35:32,544 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 2909 transitions, 75614 flow [2023-08-24 09:35:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 121.02941176470588) internal successors, (4115), 34 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:32,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:35:32,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:35:32,552 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 09:35:32,749 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,SelfDestructingSolverStorable26 [2023-08-24 09:35:32,750 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 09:35:32,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:35:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1900571060, now seen corresponding path program 25 times [2023-08-24 09:35:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:35:32,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231444816] [2023-08-24 09:35:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:35:32,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:35:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:35:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:35:33,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:35:33,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231444816] [2023-08-24 09:35:33,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231444816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:35:33,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134188964] [2023-08-24 09:35:33,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:35:33,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:35:33,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:35:33,659 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 09:35:33,661 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 09:35:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:35:33,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 09:35:33,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:35:33,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 09:35:33,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:35:34,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:35:34,293 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 50 treesize of output 44 [2023-08-24 09:35:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:35:34,421 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 50 treesize of output 44 [2023-08-24 09:35:34,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:34,760 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:34,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 51 [2023-08-24 09:35:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:35:34,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:35:35,323 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_1255 (Array Int Int))) (let ((.cse0 (+ c_~mts3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1)))) (or (= c_~mts1~0 .cse0) (< .cse0 0)))) (forall ((v_ArrVal_1255 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1))) (or (< (+ c_~sum~0 .cse2 c_~mts2~0) 1) (<= 0 (+ c_~mts3~0 .cse2))))) (forall ((v_ArrVal_1255 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1))) (or (< (+ c_~sum~0 .cse3 c_~mts2~0) (+ c_~mts1~0 1)) (< (+ c_~mts3~0 .cse3) 0)))) (or (forall ((v_ArrVal_1255 (Array Int Int))) (<= 0 (+ c_~mts3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1)))) (= c_~mts1~0 0)))) is different from false [2023-08-24 09:35:35,369 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1))) (or (< (+ .cse0 c_~sum~0 c_~mts2~0) (+ c_~mts1~0 1)) (< (+ .cse0 c_~mts3~0) 0)))) (or (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1) c_~mts3~0))) (= c_~mts1~0 0)) (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse2 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1) c_~mts3~0))) (or (< .cse2 0) (= c_~mts1~0 .cse2)))) (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse3 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse1))) (or (< (+ .cse3 c_~sum~0 c_~mts2~0) 1) (<= 0 (+ .cse3 c_~mts3~0))))))) is different from false [2023-08-24 09:35:35,468 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (let ((.cse6 (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse9 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse3))) (or (< (+ .cse9 c_~sum~0 c_~mts2~0) 1) (<= 0 (+ .cse9 c_~mts3~0)))))) (.cse0 (+ |c_thread1Thread1of1ForFork2_plus_~a#1| |c_thread1Thread1of1ForFork2_plus_~b#1|))) (and (or (< .cse0 0) (let ((.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))))) (let ((.cse5 (+ .cse2 c_~mts1~0))) (and (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse3))) (or (< (+ .cse1 c_~mts3~0) 0) (< (+ .cse1 c_~sum~0 c_~mts2~0) (+ .cse2 c_~mts1~0 1))))) (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse4 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse3) c_~mts3~0))) (or (< .cse4 0) (= .cse5 .cse4)))) (or (= .cse5 0) (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse3) c_~mts3~0)))) .cse6))) (< 2147483647 .cse0)) (or (and (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse7 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse3) c_~mts3~0))) (or (= .cse7 0) (< .cse7 0)))) (forall ((v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1254 (Array Int Int))) (let ((.cse8 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1254) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) .cse3))) (or (< (+ .cse8 c_~sum~0 c_~mts2~0) 1) (< (+ .cse8 c_~mts3~0) 0)))) .cse6) (< (+ |c_thread1Thread1of1ForFork2_plus_~a#1| |c_thread1Thread1of1ForFork2_plus_~b#1| 2147483648) 0) (<= 0 .cse0))))) is different from false [2023-08-24 09:35:48,774 WARN L234 SmtUtils]: Spent 12.14s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:35:48,848 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:48,848 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 118 treesize of output 82 [2023-08-24 09:35:48,858 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:48,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 371 treesize of output 355 [2023-08-24 09:35:48,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 255 [2023-08-24 09:35:48,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 231 [2023-08-24 09:35:48,889 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:48,889 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 144 treesize of output 136 [2023-08-24 09:35:49,421 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:49,422 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 140 treesize of output 92 [2023-08-24 09:35:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,435 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 153 [2023-08-24 09:35:49,459 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,460 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 59 treesize of output 45 [2023-08-24 09:35:49,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:49,483 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 118 treesize of output 82 [2023-08-24 09:35:49,487 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,487 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,496 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2023-08-24 09:35:49,508 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,508 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 54 treesize of output 42 [2023-08-24 09:35:49,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:49,546 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 107 treesize of output 71 [2023-08-24 09:35:49,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,560 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,561 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2023-08-24 09:35:49,574 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,575 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 49 treesize of output 41 [2023-08-24 09:35:49,601 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:35:49,601 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 90 [2023-08-24 09:35:49,605 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:35:49,615 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 145 [2023-08-24 09:35:49,630 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:35:49,630 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 57 treesize of output 43 [2023-08-24 09:35:49,667 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:35:49,667 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 119 treesize of output 1 [2023-08-24 09:35:49,676 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 09:35:49,676 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 119 treesize of output 1 [2023-08-24 09:35:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 09:35:49,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134188964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:35:49,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:35:49,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2023-08-24 09:35:49,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251943417] [2023-08-24 09:35:49,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:35:49,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:35:49,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:35:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:35:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=809, Unknown=3, NotChecked=180, Total=1122 [2023-08-24 09:35:49,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 424 [2023-08-24 09:35:49,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 2909 transitions, 75614 flow. Second operand has 34 states, 34 states have (on average 113.11764705882354) internal successors, (3846), 34 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:49,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:35:49,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 424 [2023-08-24 09:35:49,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:36:06,962 INFO L124 PetriNetUnfolderBase]: 16289/24376 cut-off events. [2023-08-24 09:36:06,962 INFO L125 PetriNetUnfolderBase]: For 869317/869317 co-relation queries the response was YES. [2023-08-24 09:36:07,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285716 conditions, 24376 events. 16289/24376 cut-off events. For 869317/869317 co-relation queries the response was YES. Maximal size of possible extension queue 1495. Compared 165050 event pairs, 1102 based on Foata normal form. 131/24507 useless extension candidates. Maximal degree in co-relation 285343. Up to 17082 conditions per place. [2023-08-24 09:36:07,423 INFO L140 encePairwiseOnDemand]: 406/424 looper letters, 2048 selfloop transitions, 1443 changer transitions 1/3492 dead transitions. [2023-08-24 09:36:07,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 3492 transitions, 96120 flow [2023-08-24 09:36:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 09:36:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 09:36:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3019 transitions. [2023-08-24 09:36:07,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.284811320754717 [2023-08-24 09:36:07,426 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3019 transitions. [2023-08-24 09:36:07,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3019 transitions. [2023-08-24 09:36:07,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:36:07,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3019 transitions. [2023-08-24 09:36:07,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 120.76) internal successors, (3019), 25 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:07,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 424.0) internal successors, (11024), 26 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:07,433 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 424.0) internal successors, (11024), 26 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:07,433 INFO L175 Difference]: Start difference. First operand has 559 places, 2909 transitions, 75614 flow. Second operand 25 states and 3019 transitions. [2023-08-24 09:36:07,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 3492 transitions, 96120 flow [2023-08-24 09:36:20,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 3492 transitions, 95625 flow, removed 194 selfloop flow, removed 4 redundant places. [2023-08-24 09:36:20,456 INFO L231 Difference]: Finished difference. Result has 590 places, 3272 transitions, 89747 flow [2023-08-24 09:36:20,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=73564, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=89747, PETRI_PLACES=590, PETRI_TRANSITIONS=3272} [2023-08-24 09:36:20,459 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 558 predicate places. [2023-08-24 09:36:20,459 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 3272 transitions, 89747 flow [2023-08-24 09:36:20,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 113.11764705882354) internal successors, (3846), 34 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:20,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:36:20,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:36:20,471 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 09:36:20,671 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,SelfDestructingSolverStorable27 [2023-08-24 09:36:20,672 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 09:36:20,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:36:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash 487553846, now seen corresponding path program 26 times [2023-08-24 09:36:20,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:36:20,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074399584] [2023-08-24 09:36:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:36:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:36:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:36:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:36:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:36:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074399584] [2023-08-24 09:36:21,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074399584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:36:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315365259] [2023-08-24 09:36:21,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:36:21,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:36:21,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:36:21,939 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 09:36:21,941 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 09:36:22,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:36:22,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:36:22,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 09:36:22,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:36:22,757 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:36:22,757 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 111 treesize of output 85 [2023-08-24 09:36:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:36:23,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:36:24,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:36:24,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 123 [2023-08-24 09:36:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:36:24,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315365259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:36:24,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:36:24,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-08-24 09:36:24,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105547072] [2023-08-24 09:36:24,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:36:24,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 09:36:24,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:36:24,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 09:36:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-08-24 09:36:24,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 424 [2023-08-24 09:36:24,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 3272 transitions, 89747 flow. Second operand has 31 states, 31 states have (on average 121.2258064516129) internal successors, (3758), 31 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:24,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:36:24,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 424 [2023-08-24 09:36:24,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:36:43,575 INFO L124 PetriNetUnfolderBase]: 15924/23999 cut-off events. [2023-08-24 09:36:43,575 INFO L125 PetriNetUnfolderBase]: For 983172/983815 co-relation queries the response was YES. [2023-08-24 09:36:43,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302374 conditions, 23999 events. 15924/23999 cut-off events. For 983172/983815 co-relation queries the response was YES. Maximal size of possible extension queue 1551. Compared 166440 event pairs, 1572 based on Foata normal form. 444/24366 useless extension candidates. Maximal degree in co-relation 301989. Up to 16918 conditions per place. [2023-08-24 09:36:44,112 INFO L140 encePairwiseOnDemand]: 413/424 looper letters, 1489 selfloop transitions, 2006 changer transitions 9/3542 dead transitions. [2023-08-24 09:36:44,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 3542 transitions, 101203 flow [2023-08-24 09:36:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:36:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:36:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3539 transitions. [2023-08-24 09:36:44,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2980963611859838 [2023-08-24 09:36:44,115 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3539 transitions. [2023-08-24 09:36:44,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3539 transitions. [2023-08-24 09:36:44,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:36:44,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3539 transitions. [2023-08-24 09:36:44,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 126.39285714285714) internal successors, (3539), 28 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:44,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 424.0) internal successors, (12296), 29 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:44,122 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 424.0) internal successors, (12296), 29 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:44,122 INFO L175 Difference]: Start difference. First operand has 590 places, 3272 transitions, 89747 flow. Second operand 28 states and 3539 transitions. [2023-08-24 09:36:44,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 3542 transitions, 101203 flow [2023-08-24 09:36:57,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 3542 transitions, 99037 flow, removed 870 selfloop flow, removed 11 redundant places. [2023-08-24 09:36:57,505 INFO L231 Difference]: Finished difference. Result has 611 places, 3320 transitions, 95784 flow [2023-08-24 09:36:57,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=87640, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=95784, PETRI_PLACES=611, PETRI_TRANSITIONS=3320} [2023-08-24 09:36:57,508 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 579 predicate places. [2023-08-24 09:36:57,508 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 3320 transitions, 95784 flow [2023-08-24 09:36:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 121.2258064516129) internal successors, (3758), 31 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:57,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:36:57,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:36:57,513 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 09:36:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 09:36:57,713 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 09:36:57,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:36:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1799941519, now seen corresponding path program 27 times [2023-08-24 09:36:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:36:57,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87002183] [2023-08-24 09:36:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:36:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:36:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:36:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:36:57,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:36:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87002183] [2023-08-24 09:36:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87002183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:36:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287744901] [2023-08-24 09:36:57,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:36:57,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:36:57,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:36:57,873 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 09:36:57,905 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 09:36:58,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:36:58,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:36:58,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:36:58,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:36:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:36:58,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:36:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:36:58,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287744901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:36:58,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:36:58,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 09:36:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320105994] [2023-08-24 09:36:58,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:36:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 09:36:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:36:58,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 09:36:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:36:58,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 424 [2023-08-24 09:36:58,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 3320 transitions, 95784 flow. Second operand has 15 states, 15 states have (on average 165.6) internal successors, (2484), 15 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:58,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:36:58,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 424 [2023-08-24 09:36:58,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:37:14,047 INFO L124 PetriNetUnfolderBase]: 14407/22331 cut-off events. [2023-08-24 09:37:14,048 INFO L125 PetriNetUnfolderBase]: For 1017724/1018495 co-relation queries the response was YES. [2023-08-24 09:37:14,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287956 conditions, 22331 events. 14407/22331 cut-off events. For 1017724/1018495 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 161867 event pairs, 2940 based on Foata normal form. 1598/23761 useless extension candidates. Maximal degree in co-relation 287558. Up to 8537 conditions per place. [2023-08-24 09:37:14,455 INFO L140 encePairwiseOnDemand]: 418/424 looper letters, 2642 selfloop transitions, 519 changer transitions 63/3316 dead transitions. [2023-08-24 09:37:14,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 3316 transitions, 102570 flow [2023-08-24 09:37:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:37:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:37:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1205 transitions. [2023-08-24 09:37:14,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40599730458221023 [2023-08-24 09:37:14,457 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1205 transitions. [2023-08-24 09:37:14,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1205 transitions. [2023-08-24 09:37:14,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:37:14,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1205 transitions. [2023-08-24 09:37:14,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 172.14285714285714) internal successors, (1205), 7 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:14,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 424.0) internal successors, (3392), 8 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:14,459 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 424.0) internal successors, (3392), 8 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:14,459 INFO L175 Difference]: Start difference. First operand has 611 places, 3320 transitions, 95784 flow. Second operand 7 states and 1205 transitions. [2023-08-24 09:37:14,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 3316 transitions, 102570 flow [2023-08-24 09:37:27,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 3316 transitions, 101193 flow, removed 297 selfloop flow, removed 11 redundant places. [2023-08-24 09:37:27,817 INFO L231 Difference]: Finished difference. Result has 609 places, 3072 transitions, 90322 flow [2023-08-24 09:37:27,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=89212, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=90322, PETRI_PLACES=609, PETRI_TRANSITIONS=3072} [2023-08-24 09:37:27,819 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 577 predicate places. [2023-08-24 09:37:27,819 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 3072 transitions, 90322 flow [2023-08-24 09:37:27,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 165.6) internal successors, (2484), 15 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:27,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:37:27,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:37:27,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 09:37:28,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:28,020 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 09:37:28,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:37:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash -731787581, now seen corresponding path program 28 times [2023-08-24 09:37:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:37:28,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854472084] [2023-08-24 09:37:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:37:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:37:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:37:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:37:28,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:37:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854472084] [2023-08-24 09:37:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854472084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:37:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845544355] [2023-08-24 09:37:28,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:37:28,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:28,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:37:28,125 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 09:37:28,127 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 09:37:28,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:37:28,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:37:28,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:37:28,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:37:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:37:28,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:37:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:37:28,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845544355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:37:28,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:37:28,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 09:37:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531109855] [2023-08-24 09:37:28,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:37:28,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:37:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:37:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:37:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:37:28,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 424 [2023-08-24 09:37:28,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 3072 transitions, 90322 flow. Second operand has 14 states, 14 states have (on average 166.64285714285714) internal successors, (2333), 14 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:28,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:37:28,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 424 [2023-08-24 09:37:28,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:37:40,055 INFO L124 PetriNetUnfolderBase]: 10649/17130 cut-off events. [2023-08-24 09:37:40,055 INFO L125 PetriNetUnfolderBase]: For 817727/819059 co-relation queries the response was YES. [2023-08-24 09:37:40,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216296 conditions, 17130 events. 10649/17130 cut-off events. For 817727/819059 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 127204 event pairs, 2459 based on Foata normal form. 1310/18082 useless extension candidates. Maximal degree in co-relation 216104. Up to 8383 conditions per place. [2023-08-24 09:37:40,306 INFO L140 encePairwiseOnDemand]: 417/424 looper letters, 2083 selfloop transitions, 179 changer transitions 390/2763 dead transitions. [2023-08-24 09:37:40,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 2763 transitions, 81614 flow [2023-08-24 09:37:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:37:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:37:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2023-08-24 09:37:40,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41004043126684636 [2023-08-24 09:37:40,307 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2023-08-24 09:37:40,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2023-08-24 09:37:40,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:37:40,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2023-08-24 09:37:40,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:40,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 424.0) internal successors, (3392), 8 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:40,309 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 424.0) internal successors, (3392), 8 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:40,309 INFO L175 Difference]: Start difference. First operand has 609 places, 3072 transitions, 90322 flow. Second operand 7 states and 1217 transitions. [2023-08-24 09:37:40,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 2763 transitions, 81614 flow [2023-08-24 09:37:50,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 2763 transitions, 80407 flow, removed 540 selfloop flow, removed 7 redundant places. [2023-08-24 09:37:50,969 INFO L231 Difference]: Finished difference. Result has 608 places, 2149 transitions, 58474 flow [2023-08-24 09:37:50,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=69138, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=58474, PETRI_PLACES=608, PETRI_TRANSITIONS=2149} [2023-08-24 09:37:50,971 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 576 predicate places. [2023-08-24 09:37:50,971 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 2149 transitions, 58474 flow [2023-08-24 09:37:50,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 166.64285714285714) internal successors, (2333), 14 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:50,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:37:50,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:37:50,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-24 09:37:51,172 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,SelfDestructingSolverStorable30 [2023-08-24 09:37:51,173 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 09:37:51,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:37:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash -507472285, now seen corresponding path program 1 times [2023-08-24 09:37:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:37:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315332722] [2023-08-24 09:37:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:37:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:37:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:37:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:37:51,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:37:51,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315332722] [2023-08-24 09:37:51,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315332722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:37:51,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871616002] [2023-08-24 09:37:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:37:51,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:37:51,285 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 09:37:51,287 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 09:37:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:37:51,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:37:51,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:37:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:37:51,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:37:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:37:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871616002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:37:51,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:37:51,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:37:51,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591662916] [2023-08-24 09:37:51,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:37:51,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:37:51,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:37:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:37:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:37:51,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:37:51,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 2149 transitions, 58474 flow. Second operand has 18 states, 18 states have (on average 158.5) internal successors, (2853), 18 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:51,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:37:51,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:37:51,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:00,700 INFO L124 PetriNetUnfolderBase]: 10271/16044 cut-off events. [2023-08-24 09:38:00,700 INFO L125 PetriNetUnfolderBase]: For 677286/677320 co-relation queries the response was YES. [2023-08-24 09:38:00,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201257 conditions, 16044 events. 10271/16044 cut-off events. For 677286/677320 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 110740 event pairs, 2143 based on Foata normal form. 261/16279 useless extension candidates. Maximal degree in co-relation 201067. Up to 8778 conditions per place. [2023-08-24 09:38:00,967 INFO L140 encePairwiseOnDemand]: 414/424 looper letters, 1840 selfloop transitions, 308 changer transitions 96/2289 dead transitions. [2023-08-24 09:38:00,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 2289 transitions, 66043 flow [2023-08-24 09:38:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:38:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:38:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2155 transitions. [2023-08-24 09:38:00,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39096516690856314 [2023-08-24 09:38:00,969 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2155 transitions. [2023-08-24 09:38:00,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2155 transitions. [2023-08-24 09:38:00,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:00,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2155 transitions. [2023-08-24 09:38:00,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 165.76923076923077) internal successors, (2155), 13 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:00,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 424.0) internal successors, (5936), 14 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:00,973 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 424.0) internal successors, (5936), 14 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:00,973 INFO L175 Difference]: Start difference. First operand has 608 places, 2149 transitions, 58474 flow. Second operand 13 states and 2155 transitions. [2023-08-24 09:38:00,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 2289 transitions, 66043 flow [2023-08-24 09:38:09,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 2289 transitions, 63536 flow, removed 694 selfloop flow, removed 42 redundant places. [2023-08-24 09:38:09,342 INFO L231 Difference]: Finished difference. Result has 561 places, 2021 transitions, 54375 flow [2023-08-24 09:38:09,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=53738, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=54375, PETRI_PLACES=561, PETRI_TRANSITIONS=2021} [2023-08-24 09:38:09,343 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 529 predicate places. [2023-08-24 09:38:09,343 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 2021 transitions, 54375 flow [2023-08-24 09:38:09,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 158.5) internal successors, (2853), 18 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:09,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:09,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:38:09,349 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 09:38:09,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:09,545 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 09:38:09,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:09,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1013802449, now seen corresponding path program 2 times [2023-08-24 09:38:09,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:09,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891215722] [2023-08-24 09:38:09,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:09,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:09,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:09,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891215722] [2023-08-24 09:38:09,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891215722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:09,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431380951] [2023-08-24 09:38:09,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:38:09,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:09,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:09,648 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 09:38:09,650 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 09:38:09,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:38:09,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:09,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:38:09,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:09,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431380951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:10,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:10,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:38:10,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126463354] [2023-08-24 09:38:10,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:38:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:38:10,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:38:10,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:38:10,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2021 transitions, 54375 flow. Second operand has 18 states, 18 states have (on average 158.16666666666666) internal successors, (2847), 18 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:10,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:10,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:38:10,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:17,778 INFO L124 PetriNetUnfolderBase]: 9554/14955 cut-off events. [2023-08-24 09:38:17,778 INFO L125 PetriNetUnfolderBase]: For 614705/614745 co-relation queries the response was YES. [2023-08-24 09:38:17,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187273 conditions, 14955 events. 9554/14955 cut-off events. For 614705/614745 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 103021 event pairs, 2159 based on Foata normal form. 245/15171 useless extension candidates. Maximal degree in co-relation 187102. Up to 8778 conditions per place. [2023-08-24 09:38:18,017 INFO L140 encePairwiseOnDemand]: 413/424 looper letters, 1944 selfloop transitions, 202 changer transitions 82/2273 dead transitions. [2023-08-24 09:38:18,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 2273 transitions, 64287 flow [2023-08-24 09:38:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 09:38:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 09:38:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2318 transitions. [2023-08-24 09:38:18,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39049865229110514 [2023-08-24 09:38:18,019 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2318 transitions. [2023-08-24 09:38:18,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2318 transitions. [2023-08-24 09:38:18,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:18,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2318 transitions. [2023-08-24 09:38:18,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.57142857142858) internal successors, (2318), 14 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:18,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:18,023 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 424.0) internal successors, (6360), 15 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:18,023 INFO L175 Difference]: Start difference. First operand has 561 places, 2021 transitions, 54375 flow. Second operand 14 states and 2318 transitions. [2023-08-24 09:38:18,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 2273 transitions, 64287 flow [2023-08-24 09:38:25,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 2273 transitions, 63474 flow, removed 221 selfloop flow, removed 11 redundant places. [2023-08-24 09:38:25,548 INFO L231 Difference]: Finished difference. Result has 567 places, 2026 transitions, 53985 flow [2023-08-24 09:38:25,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=53670, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=53985, PETRI_PLACES=567, PETRI_TRANSITIONS=2026} [2023-08-24 09:38:25,550 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 535 predicate places. [2023-08-24 09:38:25,550 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 2026 transitions, 53985 flow [2023-08-24 09:38:25,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 158.16666666666666) internal successors, (2847), 18 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:25,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:25,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:38:25,556 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 09:38:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:25,751 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 09:38:25,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash 793222853, now seen corresponding path program 3 times [2023-08-24 09:38:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505171484] [2023-08-24 09:38:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:25,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:25,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505171484] [2023-08-24 09:38:25,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505171484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:25,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629361410] [2023-08-24 09:38:25,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:38:25,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:25,842 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 09:38:25,843 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 09:38:25,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:38:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:25,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:38:25,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:26,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629361410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:26,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:38:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051435093] [2023-08-24 09:38:26,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:38:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:38:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:38:26,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:38:26,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 2026 transitions, 53985 flow. Second operand has 16 states, 16 states have (on average 158.4375) internal successors, (2535), 16 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:26,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:26,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:38:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:31,278 INFO L124 PetriNetUnfolderBase]: 6846/10569 cut-off events. [2023-08-24 09:38:31,278 INFO L125 PetriNetUnfolderBase]: For 472382/472429 co-relation queries the response was YES. [2023-08-24 09:38:31,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135002 conditions, 10569 events. 6846/10569 cut-off events. For 472382/472429 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 66994 event pairs, 1766 based on Foata normal form. 372/10917 useless extension candidates. Maximal degree in co-relation 134830. Up to 8778 conditions per place. [2023-08-24 09:38:31,414 INFO L140 encePairwiseOnDemand]: 417/424 looper letters, 1371 selfloop transitions, 3 changer transitions 250/1656 dead transitions. [2023-08-24 09:38:31,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1656 transitions, 46181 flow [2023-08-24 09:38:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:38:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:38:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1317 transitions. [2023-08-24 09:38:31,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38826650943396224 [2023-08-24 09:38:31,415 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1317 transitions. [2023-08-24 09:38:31,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1317 transitions. [2023-08-24 09:38:31,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:31,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1317 transitions. [2023-08-24 09:38:31,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.625) internal successors, (1317), 8 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:31,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 424.0) internal successors, (3816), 9 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 09:38:31,418 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 424.0) internal successors, (3816), 9 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 09:38:31,418 INFO L175 Difference]: Start difference. First operand has 567 places, 2026 transitions, 53985 flow. Second operand 8 states and 1317 transitions. [2023-08-24 09:38:31,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1656 transitions, 46181 flow [2023-08-24 09:38:36,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 1656 transitions, 44108 flow, removed 533 selfloop flow, removed 25 redundant places. [2023-08-24 09:38:36,336 INFO L231 Difference]: Finished difference. Result has 524 places, 1406 transitions, 34824 flow [2023-08-24 09:38:36,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=40105, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=34824, PETRI_PLACES=524, PETRI_TRANSITIONS=1406} [2023-08-24 09:38:36,337 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 492 predicate places. [2023-08-24 09:38:36,337 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 1406 transitions, 34824 flow [2023-08-24 09:38:36,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 158.4375) internal successors, (2535), 16 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:36,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:36,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:38:36,343 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 09:38:36,538 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,SelfDestructingSolverStorable33 [2023-08-24 09:38:36,538 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 09:38:36,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 337865966, now seen corresponding path program 29 times [2023-08-24 09:38:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:36,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211227228] [2023-08-24 09:38:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:36,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:36,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211227228] [2023-08-24 09:38:36,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211227228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:36,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120699216] [2023-08-24 09:38:36,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:38:36,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:36,662 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 09:38:36,663 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 09:38:36,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:38:36,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:36,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:38:36,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:38:36,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:38:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120699216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:37,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:37,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-08-24 09:38:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560309697] [2023-08-24 09:38:37,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:37,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:38:37,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:38:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:38:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 424 [2023-08-24 09:38:37,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 1406 transitions, 34824 flow. Second operand has 19 states, 19 states have (on average 152.78947368421052) internal successors, (2903), 19 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:37,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:37,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 424 [2023-08-24 09:38:37,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:41,672 INFO L124 PetriNetUnfolderBase]: 7069/10375 cut-off events. [2023-08-24 09:38:41,672 INFO L125 PetriNetUnfolderBase]: For 420277/420277 co-relation queries the response was YES. [2023-08-24 09:38:41,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134477 conditions, 10375 events. 7069/10375 cut-off events. For 420277/420277 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 58850 event pairs, 372 based on Foata normal form. 106/10481 useless extension candidates. Maximal degree in co-relation 134319. Up to 4671 conditions per place. [2023-08-24 09:38:41,809 INFO L140 encePairwiseOnDemand]: 412/424 looper letters, 1210 selfloop transitions, 662 changer transitions 0/1872 dead transitions. [2023-08-24 09:38:41,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1872 transitions, 50504 flow [2023-08-24 09:38:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:38:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:38:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2832 transitions. [2023-08-24 09:38:41,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710691823899371 [2023-08-24 09:38:41,811 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2832 transitions. [2023-08-24 09:38:41,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2832 transitions. [2023-08-24 09:38:41,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:41,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2832 transitions. [2023-08-24 09:38:41,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 157.33333333333334) internal successors, (2832), 18 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,817 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 424.0) internal successors, (8056), 19 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:41,817 INFO L175 Difference]: Start difference. First operand has 524 places, 1406 transitions, 34824 flow. Second operand 18 states and 2832 transitions. [2023-08-24 09:38:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1872 transitions, 50504 flow [2023-08-24 09:38:46,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1872 transitions, 47540 flow, removed 946 selfloop flow, removed 47 redundant places. [2023-08-24 09:38:46,042 INFO L231 Difference]: Finished difference. Result has 367 places, 1498 transitions, 38181 flow [2023-08-24 09:38:46,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=31938, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=38181, PETRI_PLACES=367, PETRI_TRANSITIONS=1498} [2023-08-24 09:38:46,043 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 335 predicate places. [2023-08-24 09:38:46,043 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1498 transitions, 38181 flow [2023-08-24 09:38:46,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 152.78947368421052) internal successors, (2903), 19 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:46,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:46,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:38:46,053 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 09:38:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 09:38:46,250 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 09:38:46,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -906222082, now seen corresponding path program 30 times [2023-08-24 09:38:46,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:46,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801228728] [2023-08-24 09:38:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:38:46,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801228728] [2023-08-24 09:38:46,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801228728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619081891] [2023-08-24 09:38:46,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:38:46,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:46,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:46,401 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 09:38:46,422 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 09:38:46,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:38:46,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:46,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:38:46,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:38:46,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:38:46,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619081891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:46,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:46,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-08-24 09:38:46,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664858368] [2023-08-24 09:38:46,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:46,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:38:46,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:38:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:38:46,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 424 [2023-08-24 09:38:46,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1498 transitions, 38181 flow. Second operand has 17 states, 17 states have (on average 153.0) internal successors, (2601), 17 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:46,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:46,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 424 [2023-08-24 09:38:46,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:52,806 INFO L124 PetriNetUnfolderBase]: 8727/12811 cut-off events. [2023-08-24 09:38:52,806 INFO L125 PetriNetUnfolderBase]: For 475148/475148 co-relation queries the response was YES. [2023-08-24 09:38:52,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163760 conditions, 12811 events. 8727/12811 cut-off events. For 475148/475148 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 73992 event pairs, 265 based on Foata normal form. 50/12861 useless extension candidates. Maximal degree in co-relation 163628. Up to 5979 conditions per place. [2023-08-24 09:38:52,963 INFO L140 encePairwiseOnDemand]: 411/424 looper letters, 742 selfloop transitions, 1625 changer transitions 0/2367 dead transitions. [2023-08-24 09:38:52,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 2367 transitions, 65282 flow [2023-08-24 09:38:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 09:38:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 09:38:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5028 transitions. [2023-08-24 09:38:52,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37057783018867924 [2023-08-24 09:38:52,967 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5028 transitions. [2023-08-24 09:38:52,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5028 transitions. [2023-08-24 09:38:52,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:52,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5028 transitions. [2023-08-24 09:38:52,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 157.125) internal successors, (5028), 32 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:52,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 424.0) internal successors, (13992), 33 states have internal predecessors, (13992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:52,976 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 424.0) internal successors, (13992), 33 states have internal predecessors, (13992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:52,976 INFO L175 Difference]: Start difference. First operand has 367 places, 1498 transitions, 38181 flow. Second operand 32 states and 5028 transitions. [2023-08-24 09:38:52,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 2367 transitions, 65282 flow [2023-08-24 09:38:57,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 2367 transitions, 64633 flow, removed 321 selfloop flow, removed 4 redundant places. [2023-08-24 09:38:57,799 INFO L231 Difference]: Finished difference. Result has 406 places, 2031 transitions, 56356 flow [2023-08-24 09:38:57,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=37746, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=56356, PETRI_PLACES=406, PETRI_TRANSITIONS=2031} [2023-08-24 09:38:57,800 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 374 predicate places. [2023-08-24 09:38:57,800 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 2031 transitions, 56356 flow [2023-08-24 09:38:57,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 153.0) internal successors, (2601), 17 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:57,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:57,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:38:57,806 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 09:38:58,006 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,SelfDestructingSolverStorable35 [2023-08-24 09:38:58,006 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 09:38:58,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:58,007 INFO L85 PathProgramCache]: Analyzing trace with hash 43606506, now seen corresponding path program 31 times [2023-08-24 09:38:58,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:58,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558593118] [2023-08-24 09:38:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:58,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:38:58,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:58,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558593118] [2023-08-24 09:38:58,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558593118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:58,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522829309] [2023-08-24 09:38:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:38:58,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:58,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:58,131 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 09:38:58,132 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 09:38:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:58,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:38:58,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:38:58,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:38:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522829309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:58,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:58,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 09:38:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90708231] [2023-08-24 09:38:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:38:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:38:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:38:58,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:38:58,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 2031 transitions, 56356 flow. Second operand has 20 states, 20 states have (on average 158.05) internal successors, (3161), 20 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:58,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:58,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:38:58,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:07,012 INFO L124 PetriNetUnfolderBase]: 11273/16466 cut-off events. [2023-08-24 09:39:07,012 INFO L125 PetriNetUnfolderBase]: For 781003/781070 co-relation queries the response was YES. [2023-08-24 09:39:07,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228739 conditions, 16466 events. 11273/16466 cut-off events. For 781003/781070 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 97525 event pairs, 711 based on Foata normal form. 51/16502 useless extension candidates. Maximal degree in co-relation 228595. Up to 8084 conditions per place. [2023-08-24 09:39:07,238 INFO L140 encePairwiseOnDemand]: 413/424 looper letters, 1440 selfloop transitions, 1507 changer transitions 0/3011 dead transitions. [2023-08-24 09:39:07,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 3011 transitions, 89897 flow [2023-08-24 09:39:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 09:39:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 09:39:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3963 transitions. [2023-08-24 09:39:07,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894457547169811 [2023-08-24 09:39:07,240 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3963 transitions. [2023-08-24 09:39:07,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3963 transitions. [2023-08-24 09:39:07,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:07,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3963 transitions. [2023-08-24 09:39:07,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.125) internal successors, (3963), 24 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:07,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 424.0) internal successors, (10600), 25 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:07,247 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 424.0) internal successors, (10600), 25 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:07,248 INFO L175 Difference]: Start difference. First operand has 406 places, 2031 transitions, 56356 flow. Second operand 24 states and 3963 transitions. [2023-08-24 09:39:07,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 3011 transitions, 89897 flow [2023-08-24 09:39:18,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 3011 transitions, 86055 flow, removed 1650 selfloop flow, removed 8 redundant places. [2023-08-24 09:39:18,921 INFO L231 Difference]: Finished difference. Result has 431 places, 2471 transitions, 71369 flow [2023-08-24 09:39:18,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=54174, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=841, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=71369, PETRI_PLACES=431, PETRI_TRANSITIONS=2471} [2023-08-24 09:39:18,923 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 399 predicate places. [2023-08-24 09:39:18,923 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 2471 transitions, 71369 flow [2023-08-24 09:39:18,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 158.05) internal successors, (3161), 20 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:18,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:18,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:39:18,932 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 09:39:19,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:19,132 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 09:39:19,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1464455658, now seen corresponding path program 32 times [2023-08-24 09:39:19,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:19,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818419226] [2023-08-24 09:39:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818419226] [2023-08-24 09:39:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818419226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508390930] [2023-08-24 09:39:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:39:19,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:19,272 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 09:39:19,274 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 09:39:19,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:39:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:39:19,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:39:19,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:19,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:19,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508390930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:39:19,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:39:19,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 09:39:19,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607791641] [2023-08-24 09:39:19,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:39:19,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:39:19,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:39:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:39:19,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:39:19,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 2471 transitions, 71369 flow. Second operand has 19 states, 19 states have (on average 158.73684210526315) internal successors, (3016), 19 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:19,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:19,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:39:19,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:28,716 INFO L124 PetriNetUnfolderBase]: 11326/16542 cut-off events. [2023-08-24 09:39:28,716 INFO L125 PetriNetUnfolderBase]: For 785183/785255 co-relation queries the response was YES. [2023-08-24 09:39:28,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233066 conditions, 16542 events. 11326/16542 cut-off events. For 785183/785255 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 98449 event pairs, 1406 based on Foata normal form. 81/16605 useless extension candidates. Maximal degree in co-relation 232915. Up to 9076 conditions per place. [2023-08-24 09:39:28,959 INFO L140 encePairwiseOnDemand]: 413/424 looper letters, 1492 selfloop transitions, 1228 changer transitions 0/2784 dead transitions. [2023-08-24 09:39:28,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 2784 transitions, 85323 flow [2023-08-24 09:39:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 09:39:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 09:39:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1966 transitions. [2023-08-24 09:39:28,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3863993710691824 [2023-08-24 09:39:28,961 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1966 transitions. [2023-08-24 09:39:28,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1966 transitions. [2023-08-24 09:39:28,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:28,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1966 transitions. [2023-08-24 09:39:28,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.83333333333334) internal successors, (1966), 12 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:28,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:28,965 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:28,965 INFO L175 Difference]: Start difference. First operand has 431 places, 2471 transitions, 71369 flow. Second operand 12 states and 1966 transitions. [2023-08-24 09:39:28,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 2784 transitions, 85323 flow [2023-08-24 09:39:39,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2784 transitions, 84032 flow, removed 607 selfloop flow, removed 6 redundant places. [2023-08-24 09:39:39,795 INFO L231 Difference]: Finished difference. Result has 438 places, 2538 transitions, 75778 flow [2023-08-24 09:39:39,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=70023, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=75778, PETRI_PLACES=438, PETRI_TRANSITIONS=2538} [2023-08-24 09:39:39,797 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 406 predicate places. [2023-08-24 09:39:39,797 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 2538 transitions, 75778 flow [2023-08-24 09:39:39,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 158.73684210526315) internal successors, (3016), 19 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:39,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:39,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:39:39,806 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 09:39:40,003 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,SelfDestructingSolverStorable37 [2023-08-24 09:39:40,004 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 09:39:40,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:40,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1732073986, now seen corresponding path program 33 times [2023-08-24 09:39:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:40,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600364863] [2023-08-24 09:39:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:40,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600364863] [2023-08-24 09:39:40,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600364863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090281008] [2023-08-24 09:39:40,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:39:40,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:40,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:40,134 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 09:39:40,136 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 09:39:40,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:39:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:39:40,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:39:40,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:40,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:39:40,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090281008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:39:40,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:39:40,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 09:39:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991006603] [2023-08-24 09:39:40,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:39:40,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:39:40,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:39:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:39:40,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:39:40,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 2538 transitions, 75778 flow. Second operand has 21 states, 21 states have (on average 157.9047619047619) internal successors, (3316), 21 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:40,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:40,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:39:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:39:51,950 INFO L124 PetriNetUnfolderBase]: 13408/19380 cut-off events. [2023-08-24 09:39:51,950 INFO L125 PetriNetUnfolderBase]: For 923466/923527 co-relation queries the response was YES. [2023-08-24 09:39:52,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279492 conditions, 19380 events. 13408/19380 cut-off events. For 923466/923527 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 114544 event pairs, 567 based on Foata normal form. 63/19426 useless extension candidates. Maximal degree in co-relation 279338. Up to 9827 conditions per place. [2023-08-24 09:39:52,284 INFO L140 encePairwiseOnDemand]: 414/424 looper letters, 1368 selfloop transitions, 2002 changer transitions 0/3434 dead transitions. [2023-08-24 09:39:52,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 3434 transitions, 108396 flow [2023-08-24 09:39:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:39:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:39:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4612 transitions. [2023-08-24 09:39:52,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884770889487871 [2023-08-24 09:39:52,288 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4612 transitions. [2023-08-24 09:39:52,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4612 transitions. [2023-08-24 09:39:52,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:52,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4612 transitions. [2023-08-24 09:39:52,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 164.71428571428572) internal successors, (4612), 28 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:52,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 424.0) internal successors, (12296), 29 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:52,300 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 424.0) internal successors, (12296), 29 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:52,300 INFO L175 Difference]: Start difference. First operand has 438 places, 2538 transitions, 75778 flow. Second operand 28 states and 4612 transitions. [2023-08-24 09:39:52,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 3434 transitions, 108396 flow [2023-08-24 09:40:06,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 3434 transitions, 105211 flow, removed 273 selfloop flow, removed 11 redundant places. [2023-08-24 09:40:06,998 INFO L231 Difference]: Finished difference. Result has 456 places, 2834 transitions, 86620 flow [2023-08-24 09:40:07,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=72998, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=86620, PETRI_PLACES=456, PETRI_TRANSITIONS=2834} [2023-08-24 09:40:07,001 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 424 predicate places. [2023-08-24 09:40:07,001 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 2834 transitions, 86620 flow [2023-08-24 09:40:07,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 157.9047619047619) internal successors, (3316), 21 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:07,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:40:07,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:40:07,009 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 09:40:07,207 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,SelfDestructingSolverStorable38 [2023-08-24 09:40:07,207 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 09:40:07,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:40:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash 82094406, now seen corresponding path program 34 times [2023-08-24 09:40:07,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:40:07,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113980160] [2023-08-24 09:40:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:40:07,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:40:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:40:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:40:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:40:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113980160] [2023-08-24 09:40:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113980160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:40:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813012327] [2023-08-24 09:40:07,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:40:07,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:40:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:40:07,330 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 09:40:07,331 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 09:40:07,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:40:07,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:40:07,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:40:07,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:40:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:40:07,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:40:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:40:07,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813012327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:40:07,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:40:07,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 09:40:07,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337416064] [2023-08-24 09:40:07,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:40:07,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:40:07,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:40:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:40:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:40:07,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 424 [2023-08-24 09:40:07,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 2834 transitions, 86620 flow. Second operand has 19 states, 19 states have (on average 158.10526315789474) internal successors, (3004), 19 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:07,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:40:07,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 424 [2023-08-24 09:40:07,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:40:19,707 INFO L124 PetriNetUnfolderBase]: 13418/19380 cut-off events. [2023-08-24 09:40:19,707 INFO L125 PetriNetUnfolderBase]: For 948873/948934 co-relation queries the response was YES. [2023-08-24 09:40:19,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286984 conditions, 19380 events. 13418/19380 cut-off events. For 948873/948934 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 114964 event pairs, 1987 based on Foata normal form. 55/19406 useless extension candidates. Maximal degree in co-relation 286832. Up to 12752 conditions per place. [2023-08-24 09:40:20,008 INFO L140 encePairwiseOnDemand]: 413/424 looper letters, 1579 selfloop transitions, 1345 changer transitions 0/2987 dead transitions. [2023-08-24 09:40:20,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 2987 transitions, 96659 flow [2023-08-24 09:40:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 09:40:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 09:40:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1961 transitions. [2023-08-24 09:40:20,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2023-08-24 09:40:20,010 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1961 transitions. [2023-08-24 09:40:20,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1961 transitions. [2023-08-24 09:40:20,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:40:20,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1961 transitions. [2023-08-24 09:40:20,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.41666666666666) internal successors, (1961), 12 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:20,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:20,014 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:20,014 INFO L175 Difference]: Start difference. First operand has 456 places, 2834 transitions, 86620 flow. Second operand 12 states and 1961 transitions. [2023-08-24 09:40:20,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 2987 transitions, 96659 flow [2023-08-24 09:40:35,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2987 transitions, 95468 flow, removed 524 selfloop flow, removed 6 redundant places. [2023-08-24 09:40:35,995 INFO L231 Difference]: Finished difference. Result has 462 places, 2835 transitions, 88338 flow [2023-08-24 09:40:35,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=85320, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=88338, PETRI_PLACES=462, PETRI_TRANSITIONS=2835} [2023-08-24 09:40:35,997 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 430 predicate places. [2023-08-24 09:40:35,997 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 2835 transitions, 88338 flow [2023-08-24 09:40:35,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 158.10526315789474) internal successors, (3004), 19 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:35,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:40:35,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:40:36,003 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 09:40:36,198 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,SelfDestructingSolverStorable39 [2023-08-24 09:40:36,198 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 09:40:36,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:40:36,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1938970370, now seen corresponding path program 35 times [2023-08-24 09:40:36,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:40:36,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299686847] [2023-08-24 09:40:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:40:36,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:40:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:40:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:40:36,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:40:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299686847] [2023-08-24 09:40:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299686847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:40:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775641742] [2023-08-24 09:40:36,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:40:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:40:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:40:36,318 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 09:40:36,320 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 09:40:36,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:40:36,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:40:36,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:40:36,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:40:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:40:36,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:40:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:40:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775641742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:40:36,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:40:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-08-24 09:40:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171496268] [2023-08-24 09:40:36,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:40:36,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:40:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:40:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:40:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:40:36,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 424 [2023-08-24 09:40:36,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 2835 transitions, 88338 flow. Second operand has 18 states, 18 states have (on average 152.66666666666666) internal successors, (2748), 18 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:36,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:40:36,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 424 [2023-08-24 09:40:36,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:40:49,932 INFO L124 PetriNetUnfolderBase]: 13760/19848 cut-off events. [2023-08-24 09:40:49,933 INFO L125 PetriNetUnfolderBase]: For 912451/912451 co-relation queries the response was YES. [2023-08-24 09:40:50,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292796 conditions, 19848 events. 13760/19848 cut-off events. For 912451/912451 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 117248 event pairs, 596 based on Foata normal form. 58/19906 useless extension candidates. Maximal degree in co-relation 292643. Up to 10095 conditions per place. [2023-08-24 09:40:50,231 INFO L140 encePairwiseOnDemand]: 410/424 looper letters, 1140 selfloop transitions, 2387 changer transitions 0/3527 dead transitions. [2023-08-24 09:40:50,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 3527 transitions, 114481 flow [2023-08-24 09:40:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 09:40:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 09:40:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6936 transitions. [2023-08-24 09:40:50,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37178387650085765 [2023-08-24 09:40:50,236 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6936 transitions. [2023-08-24 09:40:50,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6936 transitions. [2023-08-24 09:40:50,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:40:50,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6936 transitions. [2023-08-24 09:40:50,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 157.63636363636363) internal successors, (6936), 44 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:50,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 424.0) internal successors, (19080), 45 states have internal predecessors, (19080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:50,254 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 424.0) internal successors, (19080), 45 states have internal predecessors, (19080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:50,254 INFO L175 Difference]: Start difference. First operand has 462 places, 2835 transitions, 88338 flow. Second operand 44 states and 6936 transitions. [2023-08-24 09:40:50,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 3527 transitions, 114481 flow [2023-08-24 09:41:03,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 3527 transitions, 113861 flow, removed 23 selfloop flow, removed 8 redundant places. [2023-08-24 09:41:03,860 INFO L231 Difference]: Finished difference. Result has 506 places, 3126 transitions, 102782 flow [2023-08-24 09:41:03,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=87359, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2093, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=102782, PETRI_PLACES=506, PETRI_TRANSITIONS=3126} [2023-08-24 09:41:03,862 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 474 predicate places. [2023-08-24 09:41:03,863 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 3126 transitions, 102782 flow [2023-08-24 09:41:03,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 152.66666666666666) internal successors, (2748), 18 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:03,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:41:03,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:41:03,868 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 09:41:04,063 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,SelfDestructingSolverStorable40 [2023-08-24 09:41:04,064 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 09:41:04,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:41:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1206216458, now seen corresponding path program 36 times [2023-08-24 09:41:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:41:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15280105] [2023-08-24 09:41:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:41:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:41:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:41:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:41:04,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:41:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15280105] [2023-08-24 09:41:04,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15280105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:41:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893146056] [2023-08-24 09:41:04,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:41:04,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:41:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:41:04,233 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 09:41:04,238 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 09:41:04,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:41:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:41:04,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:41:04,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:41:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:41:04,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:41:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:41:04,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893146056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:41:04,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:41:04,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-08-24 09:41:04,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795414237] [2023-08-24 09:41:04,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:41:04,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:41:04,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:41:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:41:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:41:04,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 424 [2023-08-24 09:41:04,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 3126 transitions, 102782 flow. Second operand has 19 states, 19 states have (on average 152.47368421052633) internal successors, (2897), 19 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:04,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:41:04,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 424 [2023-08-24 09:41:04,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:41:19,744 INFO L124 PetriNetUnfolderBase]: 13645/19637 cut-off events. [2023-08-24 09:41:19,744 INFO L125 PetriNetUnfolderBase]: For 983033/983033 co-relation queries the response was YES. [2023-08-24 09:41:19,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304704 conditions, 19637 events. 13645/19637 cut-off events. For 983033/983033 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 115154 event pairs, 570 based on Foata normal form. 68/19705 useless extension candidates. Maximal degree in co-relation 304539. Up to 10051 conditions per place. [2023-08-24 09:41:20,086 INFO L140 encePairwiseOnDemand]: 411/424 looper letters, 1445 selfloop transitions, 2039 changer transitions 0/3484 dead transitions. [2023-08-24 09:41:20,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 3484 transitions, 120010 flow [2023-08-24 09:41:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 09:41:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 09:41:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5985 transitions. [2023-08-24 09:41:20,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3714622641509434 [2023-08-24 09:41:20,090 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5985 transitions. [2023-08-24 09:41:20,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5985 transitions. [2023-08-24 09:41:20,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:41:20,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5985 transitions. [2023-08-24 09:41:20,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 157.5) internal successors, (5985), 38 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:20,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 424.0) internal successors, (16536), 39 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:20,102 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 424.0) internal successors, (16536), 39 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:20,102 INFO L175 Difference]: Start difference. First operand has 506 places, 3126 transitions, 102782 flow. Second operand 38 states and 5985 transitions. [2023-08-24 09:41:20,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 3484 transitions, 120010 flow [2023-08-24 09:41:38,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 3484 transitions, 116192 flow, removed 1123 selfloop flow, removed 11 redundant places. [2023-08-24 09:41:38,633 INFO L231 Difference]: Finished difference. Result has 530 places, 3121 transitions, 103596 flow [2023-08-24 09:41:38,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=98381, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1080, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=103596, PETRI_PLACES=530, PETRI_TRANSITIONS=3121} [2023-08-24 09:41:38,636 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 498 predicate places. [2023-08-24 09:41:38,636 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 3121 transitions, 103596 flow [2023-08-24 09:41:38,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 152.47368421052633) internal successors, (2897), 19 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:38,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:41:38,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:41:38,642 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 09:41:38,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:41:38,839 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 09:41:38,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:41:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash -842353479, now seen corresponding path program 37 times [2023-08-24 09:41:38,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:41:38,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887381032] [2023-08-24 09:41:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:41:38,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:41:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:41:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:41:41,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:41:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887381032] [2023-08-24 09:41:41,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887381032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:41:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715899167] [2023-08-24 09:41:41,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:41:41,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:41:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:41:41,065 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 09:41:41,070 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 09:41:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:41:41,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-24 09:41:41,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:41:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:41:43,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:41:43,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 144 [2023-08-24 09:41:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:41:44,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-08-24 09:42:20,638 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:42:20,645 WARN L266 SmtUtils]: Removed 45 from assertion stack [2023-08-24 09:42:20,648 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:42:20,648 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 09:42:20,653 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 09:42:20,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:20,849 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1637 for 24853ms.. [2023-08-24 09:42:20,850 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 09:42:20,851 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 09:42:20,851 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 09:42:20,851 INFO L445 BasicCegarLoop]: Path program histogram: [37, 3, 1, 1, 1] [2023-08-24 09:42:20,853 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 09:42:20,853 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 09:42:20,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 09:42:20 BasicIcfg [2023-08-24 09:42:20,855 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 09:42:20,855 INFO L158 Benchmark]: Toolchain (without parser) took 780662.64ms. Allocated memory was 364.9MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 340.4MB in the beginning and 6.8GB in the end (delta: -6.4GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-08-24 09:42:20,855 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 364.9MB. Free memory is still 342.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:42:20,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.21ms. Allocated memory is still 364.9MB. Free memory was 339.6MB in the beginning and 328.4MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 09:42:20,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.36ms. Allocated memory is still 364.9MB. Free memory was 328.4MB in the beginning and 325.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:42:20,855 INFO L158 Benchmark]: Boogie Preprocessor took 25.95ms. Allocated memory is still 364.9MB. Free memory was 325.7MB in the beginning and 324.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:42:20,855 INFO L158 Benchmark]: RCFGBuilder took 638.93ms. Allocated memory is still 364.9MB. Free memory was 323.6MB in the beginning and 285.8MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-24 09:42:20,856 INFO L158 Benchmark]: TraceAbstraction took 779643.62ms. Allocated memory was 364.9MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 285.1MB in the beginning and 6.8GB in the end (delta: -6.5GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2023-08-24 09:42:20,856 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 364.9MB. Free memory is still 342.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 286.21ms. Allocated memory is still 364.9MB. Free memory was 339.6MB in the beginning and 328.4MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.36ms. Allocated memory is still 364.9MB. Free memory was 328.4MB in the beginning and 325.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.95ms. Allocated memory is still 364.9MB. Free memory was 325.7MB in the beginning and 324.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 638.93ms. Allocated memory is still 364.9MB. Free memory was 323.6MB in the beginning and 285.8MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * TraceAbstraction took 779643.62ms. Allocated memory was 364.9MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 285.1MB in the beginning and 6.8GB in the end (delta: -6.5GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.4s, 189 PlacesBefore, 32 PlacesAfterwards, 197 TransitionsBefore, 26 TransitionsAfterwards, 7578 CoEnabledTransitionPairs, 7 FixpointIterations, 78 TrivialSequentialCompositions, 84 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 24 ConcurrentYvCompositions, 14 ChoiceCompositions, 214 TotalNumberOfCompositions, 7276 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6766, independent: 6728, independent conditional: 0, independent unconditional: 6728, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4306, independent: 4285, independent conditional: 0, independent unconditional: 4285, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6766, independent: 2443, independent conditional: 0, independent unconditional: 2443, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 4306, unknown conditional: 0, unknown unconditional: 4306] , Statistics on independence cache: Total cache size (in pairs): 75, Positive cache size: 70, Positive conditional cache size: 0, Positive unconditional cache size: 70, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1637 for 24853ms.. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1637 for 24853ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1637 for 24853ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1637 for 24853ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 280 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: 779.5s, OverallIterations: 43, TraceHistogramMax: 2, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.0s, AutomataDifference: 562.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.6s, HoareTripleCheckerStatistics: 66 mSolverCounterUnknown, 6539 SdHoareTripleChecker+Valid, 45.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6539 mSDsluCounter, 2662 SdHoareTripleChecker+Invalid, 41.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2091 IncrementalHoareTripleChecker+Unchecked, 2389 mSDsCounter, 498 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43837 IncrementalHoareTripleChecker+Invalid, 46492 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 498 mSolverCounterUnsat, 273 mSDtfsCounter, 43837 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2952 GetRequests, 1305 SyntacticMatches, 48 SemanticMatches, 1599 ConstructedPredicates, 10 IntricatePredicates, 1 DeprecatedPredicates, 18534 ImplicationChecksByTransitivity, 135.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103596occurred in iteration=42, InterpolantAutomatonStates: 879, 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: 0.7s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 153.2s InterpolantComputationTime, 2048 NumberOfCodeBlocks, 2046 NumberOfCodeBlocksAsserted, 121 NumberOfCheckSat, 2938 ConstructedInterpolants, 135 QuantifiedInterpolants, 96574 SizeOfPredicates, 750 NumberOfNonLiveVariables, 10991 ConjunctsInSsa, 1637 ConjunctsInUnsatCore, 124 InterpolantComputations, 3 PerfectInterpolantSequences, 179/510 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