/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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:06:04,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:06:04,086 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 [2023-08-27 08:06:04,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:06:04,091 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:06:04,126 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:06:04,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:06:04,131 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:06:04,132 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:06:04,136 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:06:04,136 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:06:04,136 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:06:04,136 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:06:04,137 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:06:04,138 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:06:04,138 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:06:04,138 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:06:04,138 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:06:04,138 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:06:04,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:06:04,139 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:06:04,140 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:06:04,140 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:06:04,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:06:04,140 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:06:04,141 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:06:04,141 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:06:04,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:06:04,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:06:04,142 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:06:04,142 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:06:04,143 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:06:04,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:06:04,143 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:06:04,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:06:04,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:06:04,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:06:04,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:06:04,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:06:04,504 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:06:04,506 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:06:04,507 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-27 08:06:05,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:06:05,809 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:06:05,810 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-27 08:06:05,816 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98353332f/4958ef3b0fff4e30b963510ca71f76c0/FLAG540ff4e8b [2023-08-27 08:06:05,826 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98353332f/4958ef3b0fff4e30b963510ca71f76c0 [2023-08-27 08:06:05,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:06:05,829 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:06:05,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:06:05,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:06:05,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:06:05,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:06:05" (1/1) ... [2023-08-27 08:06:05,833 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554ab32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:05, skipping insertion in model container [2023-08-27 08:06:05,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:06:05" (1/1) ... [2023-08-27 08:06:05,855 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:06:06,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:06:06,072 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:06:06,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:06:06,118 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:06:06,118 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:06:06,123 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:06:06,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06 WrapperNode [2023-08-27 08:06:06,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:06:06,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:06:06,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:06:06,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:06:06,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,192 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 290 [2023-08-27 08:06:06,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:06:06,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:06:06,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:06:06,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:06:06,205 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,217 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:06:06,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:06:06,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:06:06,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:06:06,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (1/1) ... [2023-08-27 08:06:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:06:06,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:06,282 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) [2023-08-27 08:06:06,308 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 [2023-08-27 08:06:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:06:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:06:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:06:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:06:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:06:06,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:06:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:06:06,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:06:06,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 08:06:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 08:06:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:06:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 08:06:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 08:06:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:06:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:06:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:06:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:06:06,330 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 08:06:06,429 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:06:06,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:06:06,830 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:06:06,958 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:06:06,958 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-27 08:06:06,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:06:06 BoogieIcfgContainer [2023-08-27 08:06:06,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:06:06,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:06:06,965 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:06:06,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:06:06,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:06:05" (1/3) ... [2023-08-27 08:06:06,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1870c568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:06:06, skipping insertion in model container [2023-08-27 08:06:06,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:06:06" (2/3) ... [2023-08-27 08:06:06,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1870c568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:06:06, skipping insertion in model container [2023-08-27 08:06:06,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:06:06" (3/3) ... [2023-08-27 08:06:06,972 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-08-27 08:06:06,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:06:06,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-08-27 08:06:06,986 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:06:07,084 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 08:06:07,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 248 transitions, 520 flow [2023-08-27 08:06:07,216 INFO L124 PetriNetUnfolderBase]: 18/245 cut-off events. [2023-08-27 08:06:07,216 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:06:07,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 245 events. 18/245 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 200. Up to 3 conditions per place. [2023-08-27 08:06:07,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 248 transitions, 520 flow [2023-08-27 08:06:07,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 234 transitions, 486 flow [2023-08-27 08:06:07,234 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:06:07,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 234 transitions, 486 flow [2023-08-27 08:06:07,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 234 transitions, 486 flow [2023-08-27 08:06:07,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 234 transitions, 486 flow [2023-08-27 08:06:07,318 INFO L124 PetriNetUnfolderBase]: 18/234 cut-off events. [2023-08-27 08:06:07,318 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:06:07,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 234 events. 18/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 242 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 200. Up to 3 conditions per place. [2023-08-27 08:06:07,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 3960 [2023-08-27 08:06:15,689 INFO L134 LiptonReduction]: Checked pairs total: 7261 [2023-08-27 08:06:15,689 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-27 08:06:15,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:06:15,706 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;@6b97f500, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:06:15,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-27 08:06:15,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:06:15,709 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:06:15,709 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:06:15,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:15,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:06:15,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:15,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash 36335, now seen corresponding path program 1 times [2023-08-27 08:06:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:15,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119418145] [2023-08-27 08:06:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:15,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119418145] [2023-08-27 08:06:15,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119418145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:15,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:06:15,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:06:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927576951] [2023-08-27 08:06:15,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:15,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:06:16,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 08:06:16,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:16,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:16,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 08:06:16,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:16,518 INFO L124 PetriNetUnfolderBase]: 2691/3608 cut-off events. [2023-08-27 08:06:16,518 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-27 08:06:16,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7403 conditions, 3608 events. 2691/3608 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16198 event pairs, 1768 based on Foata normal form. 0/1395 useless extension candidates. Maximal degree in co-relation 6685. Up to 3605 conditions per place. [2023-08-27 08:06:16,545 INFO L140 encePairwiseOnDemand]: 488/503 looper letters, 40 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-27 08:06:16,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 200 flow [2023-08-27 08:06:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-27 08:06:16,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280980781974818 [2023-08-27 08:06:16,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-27 08:06:16,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-27 08:06:16,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:16,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-27 08:06:16,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:16,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:16,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:16,584 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 114 flow. Second operand 3 states and 646 transitions. [2023-08-27 08:06:16,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 200 flow [2023-08-27 08:06:16,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 08:06:16,591 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 134 flow [2023-08-27 08:06:16,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-27 08:06:16,598 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-27 08:06:16,599 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 134 flow [2023-08-27 08:06:16,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:16,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:16,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:06:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:06:16,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:16,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1128527, now seen corresponding path program 1 times [2023-08-27 08:06:16,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825130077] [2023-08-27 08:06:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:16,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:16,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825130077] [2023-08-27 08:06:16,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825130077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:16,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55355313] [2023-08-27 08:06:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:16,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:16,735 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) [2023-08-27 08:06:16,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 08:06:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:16,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:06:16,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:16,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:16,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55355313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:16,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:16,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 08:06:16,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606731169] [2023-08-27 08:06:16,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:16,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:06:16,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:16,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:06:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:06:16,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 08:06:16,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:16,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:16,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 08:06:16,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:17,264 INFO L124 PetriNetUnfolderBase]: 2691/3606 cut-off events. [2023-08-27 08:06:17,265 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-27 08:06:17,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7295 conditions, 3606 events. 2691/3606 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16225 event pairs, 1768 based on Foata normal form. 0/1397 useless extension candidates. Maximal degree in co-relation 7253. Up to 3597 conditions per place. [2023-08-27 08:06:17,284 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-08-27 08:06:17,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 212 flow [2023-08-27 08:06:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:06:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:06:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 833 transitions. [2023-08-27 08:06:17,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140159045725646 [2023-08-27 08:06:17,287 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 833 transitions. [2023-08-27 08:06:17,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 833 transitions. [2023-08-27 08:06:17,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:17,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 833 transitions. [2023-08-27 08:06:17,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:17,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:17,294 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:17,294 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 134 flow. Second operand 4 states and 833 transitions. [2023-08-27 08:06:17,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 212 flow [2023-08-27 08:06:17,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:17,296 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 128 flow [2023-08-27 08:06:17,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-27 08:06:17,297 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-27 08:06:17,297 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 128 flow [2023-08-27 08:06:17,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:17,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:17,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:06:17,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:17,503 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 [2023-08-27 08:06:17,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:17,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:17,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1128540, now seen corresponding path program 1 times [2023-08-27 08:06:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:17,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448173860] [2023-08-27 08:06:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448173860] [2023-08-27 08:06:17,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448173860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034981796] [2023-08-27 08:06:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:17,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:17,588 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) [2023-08-27 08:06:17,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 08:06:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:17,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:06:17,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:17,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:17,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034981796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:17,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:17,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 08:06:17,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173127159] [2023-08-27 08:06:17,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:17,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:06:17,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:06:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:06:17,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 08:06:17,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 198.14285714285714) internal successors, (1387), 7 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:17,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:17,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 08:06:17,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:18,199 INFO L124 PetriNetUnfolderBase]: 2697/3618 cut-off events. [2023-08-27 08:06:18,200 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-27 08:06:18,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7338 conditions, 3618 events. 2697/3618 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16322 event pairs, 1768 based on Foata normal form. 0/1410 useless extension candidates. Maximal degree in co-relation 7253. Up to 3606 conditions per place. [2023-08-27 08:06:18,220 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 38 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-08-27 08:06:18,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 298 flow [2023-08-27 08:06:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:06:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:06:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1243 transitions. [2023-08-27 08:06:18,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118621603711067 [2023-08-27 08:06:18,224 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1243 transitions. [2023-08-27 08:06:18,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1243 transitions. [2023-08-27 08:06:18,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:18,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1243 transitions. [2023-08-27 08:06:18,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.16666666666666) internal successors, (1243), 6 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:18,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:18,233 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:18,233 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 128 flow. Second operand 6 states and 1243 transitions. [2023-08-27 08:06:18,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 298 flow [2023-08-27 08:06:18,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:18,236 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 244 flow [2023-08-27 08:06:18,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-27 08:06:18,237 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-27 08:06:18,237 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 244 flow [2023-08-27 08:06:18,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 198.14285714285714) internal successors, (1387), 7 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:18,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:18,238 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:06:18,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:18,444 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 [2023-08-27 08:06:18,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:18,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash -737663492, now seen corresponding path program 2 times [2023-08-27 08:06:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:18,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734977065] [2023-08-27 08:06:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734977065] [2023-08-27 08:06:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734977065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753332551] [2023-08-27 08:06:18,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:18,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:18,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:18,565 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) [2023-08-27 08:06:18,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 08:06:18,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:06:18,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:18,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:06:18,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:06:18,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:18,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753332551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:18,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:18,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:06:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838292111] [2023-08-27 08:06:18,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:18,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:18,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:06:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 503 [2023-08-27 08:06:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:18,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:18,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 503 [2023-08-27 08:06:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:19,068 INFO L124 PetriNetUnfolderBase]: 2697/3617 cut-off events. [2023-08-27 08:06:19,068 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-27 08:06:19,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7363 conditions, 3617 events. 2697/3617 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16307 event pairs, 1768 based on Foata normal form. 1/1413 useless extension candidates. Maximal degree in co-relation 7304. Up to 3611 conditions per place. [2023-08-27 08:06:19,087 INFO L140 encePairwiseOnDemand]: 500/503 looper letters, 48 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2023-08-27 08:06:19,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 342 flow [2023-08-27 08:06:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-27 08:06:19,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42147117296222664 [2023-08-27 08:06:19,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-27 08:06:19,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-27 08:06:19,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:19,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-27 08:06:19,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,096 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 244 flow. Second operand 3 states and 636 transitions. [2023-08-27 08:06:19,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 342 flow [2023-08-27 08:06:19,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 316 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:06:19,098 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 220 flow [2023-08-27 08:06:19,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-08-27 08:06:19,099 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-27 08:06:19,099 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 220 flow [2023-08-27 08:06:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:19,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:06:19,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:19,305 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 [2023-08-27 08:06:19,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:19,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -721938586, now seen corresponding path program 1 times [2023-08-27 08:06:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:19,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710866421] [2023-08-27 08:06:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:19,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:19,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710866421] [2023-08-27 08:06:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710866421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:19,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:06:19,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:06:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432126855] [2023-08-27 08:06:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:19,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:06:19,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 503 [2023-08-27 08:06:19,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:19,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 503 [2023-08-27 08:06:19,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:19,802 INFO L124 PetriNetUnfolderBase]: 2909/4057 cut-off events. [2023-08-27 08:06:19,802 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-27 08:06:19,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8255 conditions, 4057 events. 2909/4057 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18362 event pairs, 1769 based on Foata normal form. 0/1807 useless extension candidates. Maximal degree in co-relation 8200. Up to 3282 conditions per place. [2023-08-27 08:06:19,826 INFO L140 encePairwiseOnDemand]: 497/503 looper letters, 74 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-27 08:06:19,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 424 flow [2023-08-27 08:06:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 685 transitions. [2023-08-27 08:06:19,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45394300861497683 [2023-08-27 08:06:19,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 685 transitions. [2023-08-27 08:06:19,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 685 transitions. [2023-08-27 08:06:19,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:19,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 685 transitions. [2023-08-27 08:06:19,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,835 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 220 flow. Second operand 3 states and 685 transitions. [2023-08-27 08:06:19,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 424 flow [2023-08-27 08:06:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:19,839 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 236 flow [2023-08-27 08:06:19,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2023-08-27 08:06:19,840 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-27 08:06:19,841 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 236 flow [2023-08-27 08:06:19,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:19,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:06:19,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 08:06:19,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:19,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash -721938755, now seen corresponding path program 1 times [2023-08-27 08:06:19,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:19,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859120094] [2023-08-27 08:06:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:19,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:19,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:19,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859120094] [2023-08-27 08:06:19,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859120094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:19,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:06:19,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:06:19,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327638727] [2023-08-27 08:06:19,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:19,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:06:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:19,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:06:19,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:06:19,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 503 [2023-08-27 08:06:19,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:19,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:19,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 503 [2023-08-27 08:06:19,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:20,374 INFO L124 PetriNetUnfolderBase]: 2666/3739 cut-off events. [2023-08-27 08:06:20,375 INFO L125 PetriNetUnfolderBase]: For 312/454 co-relation queries the response was YES. [2023-08-27 08:06:20,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8888 conditions, 3739 events. 2666/3739 cut-off events. For 312/454 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 17551 event pairs, 2036 based on Foata normal form. 216/2051 useless extension candidates. Maximal degree in co-relation 8808. Up to 3668 conditions per place. [2023-08-27 08:06:20,395 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 77 selfloop transitions, 3 changer transitions 1/82 dead transitions. [2023-08-27 08:06:20,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 497 flow [2023-08-27 08:06:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:06:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:06:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2023-08-27 08:06:20,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40059642147117297 [2023-08-27 08:06:20,398 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2023-08-27 08:06:20,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2023-08-27 08:06:20,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:20,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2023-08-27 08:06:20,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:20,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:20,404 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:20,404 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 236 flow. Second operand 4 states and 806 transitions. [2023-08-27 08:06:20,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 497 flow [2023-08-27 08:06:20,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:06:20,409 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 251 flow [2023-08-27 08:06:20,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-08-27 08:06:20,412 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-27 08:06:20,412 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 251 flow [2023-08-27 08:06:20,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:20,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:20,412 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 08:06:20,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 08:06:20,413 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:20,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash -917486090, now seen corresponding path program 1 times [2023-08-27 08:06:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:20,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135214606] [2023-08-27 08:06:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:20,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135214606] [2023-08-27 08:06:20,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135214606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:20,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599991096] [2023-08-27 08:06:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:20,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:20,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:20,496 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) [2023-08-27 08:06:20,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 08:06:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:20,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 08:06:20,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:20,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:20,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599991096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:20,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:20,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:06:20,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020753357] [2023-08-27 08:06:20,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:20,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:06:20,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:06:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:06:20,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 08:06:20,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 251 flow. Second operand has 13 states, 13 states have (on average 198.15384615384616) internal successors, (2576), 13 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:20,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:20,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 08:06:20,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:21,185 INFO L124 PetriNetUnfolderBase]: 2684/3775 cut-off events. [2023-08-27 08:06:21,186 INFO L125 PetriNetUnfolderBase]: For 857/997 co-relation queries the response was YES. [2023-08-27 08:06:21,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9506 conditions, 3775 events. 2684/3775 cut-off events. For 857/997 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 17866 event pairs, 2036 based on Foata normal form. 152/2021 useless extension candidates. Maximal degree in co-relation 9287. Up to 3735 conditions per place. [2023-08-27 08:06:21,204 INFO L140 encePairwiseOnDemand]: 497/503 looper letters, 40 selfloop transitions, 41 changer transitions 0/82 dead transitions. [2023-08-27 08:06:21,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 563 flow [2023-08-27 08:06:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 08:06:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 08:06:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2448 transitions. [2023-08-27 08:06:21,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40556660039761433 [2023-08-27 08:06:21,211 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2448 transitions. [2023-08-27 08:06:21,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2448 transitions. [2023-08-27 08:06:21,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:21,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2448 transitions. [2023-08-27 08:06:21,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 503.0) internal successors, (6539), 13 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,227 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 503.0) internal successors, (6539), 13 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,227 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 251 flow. Second operand 12 states and 2448 transitions. [2023-08-27 08:06:21,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 563 flow [2023-08-27 08:06:21,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 557 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 08:06:21,230 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 531 flow [2023-08-27 08:06:21,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=531, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2023-08-27 08:06:21,231 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 18 predicate places. [2023-08-27 08:06:21,231 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 531 flow [2023-08-27 08:06:21,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.15384615384616) internal successors, (2576), 13 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:21,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:21,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:21,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:21,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:21,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:21,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1377005283, now seen corresponding path program 1 times [2023-08-27 08:06:21,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:21,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813933412] [2023-08-27 08:06:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:21,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:21,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:21,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813933412] [2023-08-27 08:06:21,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813933412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:21,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547419127] [2023-08-27 08:06:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:21,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:21,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:21,549 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) [2023-08-27 08:06:21,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 08:06:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:21,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:06:21,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:21,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547419127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:21,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:21,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 08:06:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001026681] [2023-08-27 08:06:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:21,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:06:21,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 503 [2023-08-27 08:06:21,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 531 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:21,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 503 [2023-08-27 08:06:21,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:21,958 INFO L124 PetriNetUnfolderBase]: 1540/2207 cut-off events. [2023-08-27 08:06:21,958 INFO L125 PetriNetUnfolderBase]: For 755/881 co-relation queries the response was YES. [2023-08-27 08:06:21,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5607 conditions, 2207 events. 1540/2207 cut-off events. For 755/881 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9351 event pairs, 1136 based on Foata normal form. 325/1443 useless extension candidates. Maximal degree in co-relation 5485. Up to 2205 conditions per place. [2023-08-27 08:06:21,971 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 76 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-27 08:06:21,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 667 flow [2023-08-27 08:06:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-27 08:06:21,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44267726971504306 [2023-08-27 08:06:21,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-27 08:06:21,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-27 08:06:21,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:21,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-27 08:06:21,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,978 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 531 flow. Second operand 3 states and 668 transitions. [2023-08-27 08:06:21,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 667 flow [2023-08-27 08:06:21,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 541 flow, removed 40 selfloop flow, removed 5 redundant places. [2023-08-27 08:06:21,982 INFO L231 Difference]: Finished difference. Result has 64 places, 78 transitions, 389 flow [2023-08-27 08:06:21,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=64, PETRI_TRANSITIONS=78} [2023-08-27 08:06:21,983 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2023-08-27 08:06:21,983 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 78 transitions, 389 flow [2023-08-27 08:06:21,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:21,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:21,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:21,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:22,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:22,189 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:22,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash 262516365, now seen corresponding path program 1 times [2023-08-27 08:06:22,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:22,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297017713] [2023-08-27 08:06:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:22,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:22,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297017713] [2023-08-27 08:06:22,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297017713] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:22,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638373684] [2023-08-27 08:06:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:22,237 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) [2023-08-27 08:06:22,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 08:06:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:22,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:06:22,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:22,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:22,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638373684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:22,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:22,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-08-27 08:06:22,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899532854] [2023-08-27 08:06:22,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 08:06:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 08:06:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:06:22,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 503 [2023-08-27 08:06:22,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 78 transitions, 389 flow. Second operand has 11 states, 11 states have (on average 179.9090909090909) internal successors, (1979), 11 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:22,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:22,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 503 [2023-08-27 08:06:22,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:23,191 INFO L124 PetriNetUnfolderBase]: 3241/4675 cut-off events. [2023-08-27 08:06:23,191 INFO L125 PetriNetUnfolderBase]: For 1022/1022 co-relation queries the response was YES. [2023-08-27 08:06:23,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11215 conditions, 4675 events. 3241/4675 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22864 event pairs, 1007 based on Foata normal form. 268/2939 useless extension candidates. Maximal degree in co-relation 11194. Up to 1881 conditions per place. [2023-08-27 08:06:23,217 INFO L140 encePairwiseOnDemand]: 491/503 looper letters, 252 selfloop transitions, 23 changer transitions 2/277 dead transitions. [2023-08-27 08:06:23,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 277 transitions, 1611 flow [2023-08-27 08:06:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:06:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:06:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3060 transitions. [2023-08-27 08:06:23,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802186878727634 [2023-08-27 08:06:23,226 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3060 transitions. [2023-08-27 08:06:23,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3060 transitions. [2023-08-27 08:06:23,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:23,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3060 transitions. [2023-08-27 08:06:23,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 191.25) internal successors, (3060), 16 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,245 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,245 INFO L175 Difference]: Start difference. First operand has 64 places, 78 transitions, 389 flow. Second operand 16 states and 3060 transitions. [2023-08-27 08:06:23,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 277 transitions, 1611 flow [2023-08-27 08:06:23,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 277 transitions, 1610 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:06:23,252 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 578 flow [2023-08-27 08:06:23,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=578, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2023-08-27 08:06:23,253 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-27 08:06:23,253 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 578 flow [2023-08-27 08:06:23,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 179.9090909090909) internal successors, (1979), 11 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:23,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:23,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:23,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:23,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:23,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:23,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2103775470, now seen corresponding path program 1 times [2023-08-27 08:06:23,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:23,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16063914] [2023-08-27 08:06:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:23,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:23,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16063914] [2023-08-27 08:06:23,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16063914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:23,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:06:23,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:06:23,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367933099] [2023-08-27 08:06:23,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:23,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:06:23,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 503 [2023-08-27 08:06:23,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:23,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 503 [2023-08-27 08:06:23,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:23,914 INFO L124 PetriNetUnfolderBase]: 2901/4235 cut-off events. [2023-08-27 08:06:23,914 INFO L125 PetriNetUnfolderBase]: For 2393/2393 co-relation queries the response was YES. [2023-08-27 08:06:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12223 conditions, 4235 events. 2901/4235 cut-off events. For 2393/2393 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20335 event pairs, 925 based on Foata normal form. 200/2743 useless extension candidates. Maximal degree in co-relation 12194. Up to 2204 conditions per place. [2023-08-27 08:06:23,937 INFO L140 encePairwiseOnDemand]: 500/503 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2023-08-27 08:06:23,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 109 transitions, 824 flow [2023-08-27 08:06:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-27 08:06:23,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44731610337972166 [2023-08-27 08:06:23,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-27 08:06:23,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-27 08:06:23,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:23,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-27 08:06:23,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,945 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 578 flow. Second operand 3 states and 675 transitions. [2023-08-27 08:06:23,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 109 transitions, 824 flow [2023-08-27 08:06:23,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 793 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:23,957 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 547 flow [2023-08-27 08:06:23,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=547, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2023-08-27 08:06:23,958 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2023-08-27 08:06:23,958 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 547 flow [2023-08-27 08:06:23,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:23,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:23,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:23,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 08:06:23,959 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:23,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1265016224, now seen corresponding path program 1 times [2023-08-27 08:06:23,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:23,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246269668] [2023-08-27 08:06:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:24,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:24,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246269668] [2023-08-27 08:06:24,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246269668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:24,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:06:24,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:06:24,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622582521] [2023-08-27 08:06:24,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:24,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:24,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:24,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:06:24,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 503 [2023-08-27 08:06:24,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 547 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:24,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:24,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 503 [2023-08-27 08:06:24,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:24,455 INFO L124 PetriNetUnfolderBase]: 2691/3938 cut-off events. [2023-08-27 08:06:24,455 INFO L125 PetriNetUnfolderBase]: For 6425/6695 co-relation queries the response was YES. [2023-08-27 08:06:24,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11152 conditions, 3938 events. 2691/3938 cut-off events. For 6425/6695 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19121 event pairs, 529 based on Foata normal form. 358/2790 useless extension candidates. Maximal degree in co-relation 11123. Up to 3157 conditions per place. [2023-08-27 08:06:24,474 INFO L140 encePairwiseOnDemand]: 493/503 looper letters, 99 selfloop transitions, 5 changer transitions 3/110 dead transitions. [2023-08-27 08:06:24,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 845 flow [2023-08-27 08:06:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-27 08:06:24,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44532803180914515 [2023-08-27 08:06:24,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-27 08:06:24,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-27 08:06:24,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:24,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-27 08:06:24,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:24,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:24,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:24,481 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 547 flow. Second operand 3 states and 672 transitions. [2023-08-27 08:06:24,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 845 flow [2023-08-27 08:06:24,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 110 transitions, 823 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:24,488 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 550 flow [2023-08-27 08:06:24,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=550, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2023-08-27 08:06:24,488 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-27 08:06:24,488 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 550 flow [2023-08-27 08:06:24,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:24,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:24,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:24,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 08:06:24,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:24,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash 792532038, now seen corresponding path program 2 times [2023-08-27 08:06:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:24,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031820960] [2023-08-27 08:06:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:24,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:24,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:24,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031820960] [2023-08-27 08:06:24,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031820960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:24,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691217289] [2023-08-27 08:06:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:24,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:24,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:24,549 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) [2023-08-27 08:06:24,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 08:06:24,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:06:24,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:24,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:06:24,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:24,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691217289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 08:06:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022991896] [2023-08-27 08:06:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:06:24,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 503 [2023-08-27 08:06:24,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 550 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:24,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:24,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 503 [2023-08-27 08:06:24,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:24,987 INFO L124 PetriNetUnfolderBase]: 2414/3550 cut-off events. [2023-08-27 08:06:24,987 INFO L125 PetriNetUnfolderBase]: For 3930/4057 co-relation queries the response was YES. [2023-08-27 08:06:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11228 conditions, 3550 events. 2414/3550 cut-off events. For 3930/4057 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17124 event pairs, 1373 based on Foata normal form. 127/2493 useless extension candidates. Maximal degree in co-relation 11197. Up to 3545 conditions per place. [2023-08-27 08:06:25,013 INFO L140 encePairwiseOnDemand]: 501/503 looper letters, 87 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-08-27 08:06:25,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 91 transitions, 718 flow [2023-08-27 08:06:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-27 08:06:25,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340622929092114 [2023-08-27 08:06:25,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-27 08:06:25,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-27 08:06:25,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:25,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-27 08:06:25,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,020 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 550 flow. Second operand 3 states and 655 transitions. [2023-08-27 08:06:25,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 91 transitions, 718 flow [2023-08-27 08:06:25,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 713 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:06:25,029 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 539 flow [2023-08-27 08:06:25,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=539, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2023-08-27 08:06:25,030 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2023-08-27 08:06:25,030 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 539 flow [2023-08-27 08:06:25,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:25,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:25,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:25,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:25,236 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:25,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash -874646512, now seen corresponding path program 1 times [2023-08-27 08:06:25,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:25,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576916480] [2023-08-27 08:06:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:25,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576916480] [2023-08-27 08:06:25,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576916480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:25,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:06:25,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 08:06:25,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051065891] [2023-08-27 08:06:25,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:25,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:06:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:06:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:06:25,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 503 [2023-08-27 08:06:25,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 539 flow. Second operand has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:25,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 503 [2023-08-27 08:06:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:25,781 INFO L124 PetriNetUnfolderBase]: 2683/3993 cut-off events. [2023-08-27 08:06:25,781 INFO L125 PetriNetUnfolderBase]: For 4708/4872 co-relation queries the response was YES. [2023-08-27 08:06:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12430 conditions, 3993 events. 2683/3993 cut-off events. For 4708/4872 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19907 event pairs, 1581 based on Foata normal form. 276/3063 useless extension candidates. Maximal degree in co-relation 12398. Up to 3533 conditions per place. [2023-08-27 08:06:25,803 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 74 selfloop transitions, 13 changer transitions 22/112 dead transitions. [2023-08-27 08:06:25,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 112 transitions, 850 flow [2023-08-27 08:06:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:06:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:06:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 797 transitions. [2023-08-27 08:06:25,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961232604373757 [2023-08-27 08:06:25,806 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 797 transitions. [2023-08-27 08:06:25,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 797 transitions. [2023-08-27 08:06:25,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:25,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 797 transitions. [2023-08-27 08:06:25,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,811 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,811 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 539 flow. Second operand 4 states and 797 transitions. [2023-08-27 08:06:25,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 112 transitions, 850 flow [2023-08-27 08:06:25,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:06:25,820 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 567 flow [2023-08-27 08:06:25,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=567, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2023-08-27 08:06:25,820 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2023-08-27 08:06:25,821 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 567 flow [2023-08-27 08:06:25,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:25,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:25,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 08:06:25,821 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:25,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash -615020482, now seen corresponding path program 1 times [2023-08-27 08:06:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600873695] [2023-08-27 08:06:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:06:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600873695] [2023-08-27 08:06:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600873695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:25,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:06:25,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:06:25,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076932875] [2023-08-27 08:06:25,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:06:25,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:06:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:06:25,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 503 [2023-08-27 08:06:25,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 567 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:25,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:25,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 503 [2023-08-27 08:06:25,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:26,216 INFO L124 PetriNetUnfolderBase]: 1749/2597 cut-off events. [2023-08-27 08:06:26,216 INFO L125 PetriNetUnfolderBase]: For 2416/2446 co-relation queries the response was YES. [2023-08-27 08:06:26,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 2597 events. 1749/2597 cut-off events. For 2416/2446 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11130 event pairs, 405 based on Foata normal form. 48/1783 useless extension candidates. Maximal degree in co-relation 8267. Up to 2445 conditions per place. [2023-08-27 08:06:26,228 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 87 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-27 08:06:26,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 752 flow [2023-08-27 08:06:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2023-08-27 08:06:26,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440026507620941 [2023-08-27 08:06:26,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2023-08-27 08:06:26,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2023-08-27 08:06:26,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:26,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2023-08-27 08:06:26,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,235 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 567 flow. Second operand 3 states and 670 transitions. [2023-08-27 08:06:26,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 752 flow [2023-08-27 08:06:26,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 94 transitions, 709 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-27 08:06:26,244 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 526 flow [2023-08-27 08:06:26,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=526, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-08-27 08:06:26,244 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-27 08:06:26,244 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 526 flow [2023-08-27 08:06:26,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:26,245 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 08:06:26,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 08:06:26,245 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:26,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1409315018, now seen corresponding path program 2 times [2023-08-27 08:06:26,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:26,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843404639] [2023-08-27 08:06:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:26,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:26,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:26,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843404639] [2023-08-27 08:06:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843404639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437398308] [2023-08-27 08:06:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:26,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:26,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:26,400 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) [2023-08-27 08:06:26,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 08:06:26,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:06:26,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:26,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:06:26,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-27 08:06:26,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437398308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:26,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:26,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 08:06:26,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212849608] [2023-08-27 08:06:26,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:06:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:06:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:06:26,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 503 [2023-08-27 08:06:26,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 526 flow. Second operand has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:26,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 503 [2023-08-27 08:06:26,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:26,734 INFO L124 PetriNetUnfolderBase]: 1320/1959 cut-off events. [2023-08-27 08:06:26,734 INFO L125 PetriNetUnfolderBase]: For 2413/2438 co-relation queries the response was YES. [2023-08-27 08:06:26,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 1959 events. 1320/1959 cut-off events. For 2413/2438 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7948 event pairs, 648 based on Foata normal form. 146/1447 useless extension candidates. Maximal degree in co-relation 6338. Up to 1957 conditions per place. [2023-08-27 08:06:26,750 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 77 selfloop transitions, 1 changer transitions 3/83 dead transitions. [2023-08-27 08:06:26,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 633 flow [2023-08-27 08:06:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:06:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:06:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-27 08:06:26,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115308151093439 [2023-08-27 08:06:26,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-27 08:06:26,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-27 08:06:26,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:26,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-27 08:06:26,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,756 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 526 flow. Second operand 3 states and 621 transitions. [2023-08-27 08:06:26,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 633 flow [2023-08-27 08:06:26,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 528 flow, removed 6 selfloop flow, removed 16 redundant places. [2023-08-27 08:06:26,762 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 349 flow [2023-08-27 08:06:26,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2023-08-27 08:06:26,763 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2023-08-27 08:06:26,763 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 349 flow [2023-08-27 08:06:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:26,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:26,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:26,968 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,SelfDestructingSolverStorable14 [2023-08-27 08:06:26,969 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:26,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:26,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1982621874, now seen corresponding path program 1 times [2023-08-27 08:06:26,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:26,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079357029] [2023-08-27 08:06:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:26,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:27,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079357029] [2023-08-27 08:06:27,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079357029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:27,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227857137] [2023-08-27 08:06:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:27,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:27,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:27,674 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) [2023-08-27 08:06:27,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 08:06:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:27,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:06:27,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:27,865 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 08:06:27,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 08:06:27,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:06:28,018 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:06:28,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 08:06:28,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:06:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:28,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:06:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:28,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:06:28,350 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:06:28,350 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 25 treesize of output 12 [2023-08-27 08:06:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:28,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:28,449 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_571 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_571) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649))) is different from false [2023-08-27 08:06:28,716 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:28,716 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 34 treesize of output 35 [2023-08-27 08:06:28,728 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:28,729 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 173 treesize of output 165 [2023-08-27 08:06:28,736 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 152 treesize of output 128 [2023-08-27 08:06:28,744 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 128 treesize of output 116 [2023-08-27 08:06:28,752 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 60 treesize of output 54 [2023-08-27 08:06:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:28,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227857137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:28,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:28,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 08:06:28,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583804937] [2023-08-27 08:06:28,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:28,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:06:28,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:06:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=655, Unknown=3, NotChecked=52, Total=812 [2023-08-27 08:06:28,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 503 [2023-08-27 08:06:28,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 349 flow. Second operand has 29 states, 29 states have (on average 147.24137931034483) internal successors, (4270), 29 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:28,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:28,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 503 [2023-08-27 08:06:28,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:29,486 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_571 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_571) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649))))) (and (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) .cse0) .cse0)) is different from false [2023-08-27 08:06:30,311 INFO L124 PetriNetUnfolderBase]: 1504/2276 cut-off events. [2023-08-27 08:06:30,311 INFO L125 PetriNetUnfolderBase]: For 1022/1049 co-relation queries the response was YES. [2023-08-27 08:06:30,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6672 conditions, 2276 events. 1504/2276 cut-off events. For 1022/1049 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10002 event pairs, 406 based on Foata normal form. 27/1545 useless extension candidates. Maximal degree in co-relation 6653. Up to 1298 conditions per place. [2023-08-27 08:06:30,326 INFO L140 encePairwiseOnDemand]: 487/503 looper letters, 141 selfloop transitions, 38 changer transitions 0/181 dead transitions. [2023-08-27 08:06:30,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 181 transitions, 1079 flow [2023-08-27 08:06:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:06:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:06:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2595 transitions. [2023-08-27 08:06:30,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3034732779791837 [2023-08-27 08:06:30,333 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2595 transitions. [2023-08-27 08:06:30,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2595 transitions. [2023-08-27 08:06:30,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:30,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2595 transitions. [2023-08-27 08:06:30,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:30,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 503.0) internal successors, (9054), 18 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:30,351 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 503.0) internal successors, (9054), 18 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:30,352 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 349 flow. Second operand 17 states and 2595 transitions. [2023-08-27 08:06:30,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 181 transitions, 1079 flow [2023-08-27 08:06:30,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 181 transitions, 1060 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-27 08:06:30,358 INFO L231 Difference]: Finished difference. Result has 86 places, 112 transitions, 632 flow [2023-08-27 08:06:30,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=632, PETRI_PLACES=86, PETRI_TRANSITIONS=112} [2023-08-27 08:06:30,359 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2023-08-27 08:06:30,359 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 112 transitions, 632 flow [2023-08-27 08:06:30,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 147.24137931034483) internal successors, (4270), 29 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:30,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:30,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:30,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:30,566 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,SelfDestructingSolverStorable15 [2023-08-27 08:06:30,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:30,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1171082864, now seen corresponding path program 1 times [2023-08-27 08:06:30,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:30,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731568028] [2023-08-27 08:06:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:30,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731568028] [2023-08-27 08:06:31,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731568028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270311738] [2023-08-27 08:06:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:31,069 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) [2023-08-27 08:06:31,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 08:06:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:31,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:06:31,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:31,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:31,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:06:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:06:31,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:31,409 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_624 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_624) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648)) is different from false [2023-08-27 08:06:31,419 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:31,420 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 42 treesize of output 34 [2023-08-27 08:06:31,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-27 08:06:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:06:31,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270311738] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:31,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:06:31,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 20 [2023-08-27 08:06:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988045790] [2023-08-27 08:06:31,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:31,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:06:31,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:06:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=368, Unknown=1, NotChecked=38, Total=462 [2023-08-27 08:06:31,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:06:31,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 632 flow. Second operand has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:31,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:31,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:06:31,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:32,081 INFO L124 PetriNetUnfolderBase]: 1873/2804 cut-off events. [2023-08-27 08:06:32,081 INFO L125 PetriNetUnfolderBase]: For 4796/4850 co-relation queries the response was YES. [2023-08-27 08:06:32,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10141 conditions, 2804 events. 1873/2804 cut-off events. For 4796/4850 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12545 event pairs, 318 based on Foata normal form. 52/2384 useless extension candidates. Maximal degree in co-relation 10113. Up to 1365 conditions per place. [2023-08-27 08:06:32,095 INFO L140 encePairwiseOnDemand]: 486/503 looper letters, 135 selfloop transitions, 68 changer transitions 0/205 dead transitions. [2023-08-27 08:06:32,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 205 transitions, 1540 flow [2023-08-27 08:06:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 08:06:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 08:06:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1500 transitions. [2023-08-27 08:06:32,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727634194831014 [2023-08-27 08:06:32,100 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1500 transitions. [2023-08-27 08:06:32,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1500 transitions. [2023-08-27 08:06:32,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:32,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1500 transitions. [2023-08-27 08:06:32,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:32,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 503.0) internal successors, (4527), 9 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:32,108 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 503.0) internal successors, (4527), 9 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:32,108 INFO L175 Difference]: Start difference. First operand has 86 places, 112 transitions, 632 flow. Second operand 8 states and 1500 transitions. [2023-08-27 08:06:32,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 205 transitions, 1540 flow [2023-08-27 08:06:32,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 205 transitions, 1509 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:32,124 INFO L231 Difference]: Finished difference. Result has 96 places, 158 transitions, 1185 flow [2023-08-27 08:06:32,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1185, PETRI_PLACES=96, PETRI_TRANSITIONS=158} [2023-08-27 08:06:32,125 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-27 08:06:32,125 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 158 transitions, 1185 flow [2023-08-27 08:06:32,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:32,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:32,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:32,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:32,331 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,SelfDestructingSolverStorable16 [2023-08-27 08:06:32,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:32,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2047474664, now seen corresponding path program 1 times [2023-08-27 08:06:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:32,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363933749] [2023-08-27 08:06:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:32,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:32,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363933749] [2023-08-27 08:06:32,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363933749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9438624] [2023-08-27 08:06:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:32,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:32,838 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) [2023-08-27 08:06:32,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 08:06:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:32,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 08:06:32,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:33,012 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 [2023-08-27 08:06:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:33,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:06:33,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:33,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:06:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:33,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:33,320 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:33,320 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 31 treesize of output 32 [2023-08-27 08:06:33,329 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:33,329 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 89 treesize of output 81 [2023-08-27 08:06:33,334 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 68 treesize of output 56 [2023-08-27 08:06:33,340 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 30 treesize of output 24 [2023-08-27 08:06:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9438624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:33,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:33,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-27 08:06:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301866653] [2023-08-27 08:06:33,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:33,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:06:33,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:33,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:06:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=317, Unknown=3, NotChecked=0, Total=380 [2023-08-27 08:06:33,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 503 [2023-08-27 08:06:33,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 158 transitions, 1185 flow. Second operand has 20 states, 20 states have (on average 152.7) internal successors, (3054), 20 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:33,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:33,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 503 [2023-08-27 08:06:33,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:37,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:06:38,492 INFO L124 PetriNetUnfolderBase]: 2186/3310 cut-off events. [2023-08-27 08:06:38,492 INFO L125 PetriNetUnfolderBase]: For 11402/11492 co-relation queries the response was YES. [2023-08-27 08:06:38,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 3310 events. 2186/3310 cut-off events. For 11402/11492 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15596 event pairs, 641 based on Foata normal form. 97/3155 useless extension candidates. Maximal degree in co-relation 14996. Up to 2840 conditions per place. [2023-08-27 08:06:38,510 INFO L140 encePairwiseOnDemand]: 492/503 looper letters, 218 selfloop transitions, 110 changer transitions 0/330 dead transitions. [2023-08-27 08:06:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 330 transitions, 3347 flow [2023-08-27 08:06:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 08:06:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 08:06:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2045 transitions. [2023-08-27 08:06:38,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31273895090992504 [2023-08-27 08:06:38,514 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2045 transitions. [2023-08-27 08:06:38,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2045 transitions. [2023-08-27 08:06:38,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:38,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2045 transitions. [2023-08-27 08:06:38,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:38,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 503.0) internal successors, (7042), 14 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:38,528 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 503.0) internal successors, (7042), 14 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:38,528 INFO L175 Difference]: Start difference. First operand has 96 places, 158 transitions, 1185 flow. Second operand 13 states and 2045 transitions. [2023-08-27 08:06:38,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 330 transitions, 3347 flow [2023-08-27 08:06:38,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 330 transitions, 3262 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:38,570 INFO L231 Difference]: Finished difference. Result has 109 places, 231 transitions, 2127 flow [2023-08-27 08:06:38,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2127, PETRI_PLACES=109, PETRI_TRANSITIONS=231} [2023-08-27 08:06:38,571 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2023-08-27 08:06:38,571 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 231 transitions, 2127 flow [2023-08-27 08:06:38,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 152.7) internal successors, (3054), 20 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:38,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:38,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:38,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:38,778 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,SelfDestructingSolverStorable17 [2023-08-27 08:06:38,778 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:38,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:38,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1503197747, now seen corresponding path program 1 times [2023-08-27 08:06:38,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:38,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986927268] [2023-08-27 08:06:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:39,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:39,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986927268] [2023-08-27 08:06:39,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986927268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:39,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951440434] [2023-08-27 08:06:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:39,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:39,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:39,139 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) [2023-08-27 08:06:39,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 08:06:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:39,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 08:06:39,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:39,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:39,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:39,318 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 08:06:39,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-27 08:06:39,377 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 [2023-08-27 08:06:39,430 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:06:39,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 08:06:39,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-08-27 08:06:39,519 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 [2023-08-27 08:06:39,560 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 [2023-08-27 08:06:39,602 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 [2023-08-27 08:06:39,690 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:06:39,693 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:39,693 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 17 treesize of output 10 [2023-08-27 08:06:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:39,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:40,152 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:40,152 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 74 treesize of output 62 [2023-08-27 08:06:40,188 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:06:40,189 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 5260 treesize of output 5135 [2023-08-27 08:06:40,240 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:06:40,240 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 624 treesize of output 528 [2023-08-27 08:06:40,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:06:40,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 390 treesize of output 378 [2023-08-27 08:06:40,286 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:06:40,287 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 516 treesize of output 468 [2023-08-27 08:06:40,309 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:06:40,314 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 353 treesize of output 329 [2023-08-27 08:06:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:40,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951440434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:40,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:40,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 25 [2023-08-27 08:06:40,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444966087] [2023-08-27 08:06:40,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:40,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:06:40,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:40,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:06:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=538, Unknown=16, NotChecked=0, Total=702 [2023-08-27 08:06:40,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 503 [2023-08-27 08:06:40,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 231 transitions, 2127 flow. Second operand has 27 states, 27 states have (on average 146.44444444444446) internal successors, (3954), 27 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:40,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:40,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 503 [2023-08-27 08:06:40,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:47,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:06:50,120 INFO L124 PetriNetUnfolderBase]: 3035/4842 cut-off events. [2023-08-27 08:06:50,121 INFO L125 PetriNetUnfolderBase]: For 18743/18857 co-relation queries the response was YES. [2023-08-27 08:06:50,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21780 conditions, 4842 events. 3035/4842 cut-off events. For 18743/18857 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27515 event pairs, 603 based on Foata normal form. 150/4456 useless extension candidates. Maximal degree in co-relation 21743. Up to 1680 conditions per place. [2023-08-27 08:06:50,151 INFO L140 encePairwiseOnDemand]: 488/503 looper letters, 443 selfloop transitions, 154 changer transitions 0/599 dead transitions. [2023-08-27 08:06:50,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 599 transitions, 5946 flow [2023-08-27 08:06:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:06:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:06:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4939 transitions. [2023-08-27 08:06:50,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30684642147117297 [2023-08-27 08:06:50,160 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4939 transitions. [2023-08-27 08:06:50,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4939 transitions. [2023-08-27 08:06:50,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:50,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4939 transitions. [2023-08-27 08:06:50,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 154.34375) internal successors, (4939), 32 states have internal predecessors, (4939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:50,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 503.0) internal successors, (16599), 33 states have internal predecessors, (16599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:50,183 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 503.0) internal successors, (16599), 33 states have internal predecessors, (16599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:50,183 INFO L175 Difference]: Start difference. First operand has 109 places, 231 transitions, 2127 flow. Second operand 32 states and 4939 transitions. [2023-08-27 08:06:50,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 599 transitions, 5946 flow [2023-08-27 08:06:50,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 599 transitions, 5813 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-08-27 08:06:50,314 INFO L231 Difference]: Finished difference. Result has 151 places, 349 transitions, 3868 flow [2023-08-27 08:06:50,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3868, PETRI_PLACES=151, PETRI_TRANSITIONS=349} [2023-08-27 08:06:50,314 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2023-08-27 08:06:50,314 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 349 transitions, 3868 flow [2023-08-27 08:06:50,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 146.44444444444446) internal successors, (3954), 27 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:50,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:50,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:50,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:50,522 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:50,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1665831308, now seen corresponding path program 2 times [2023-08-27 08:06:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:50,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120954272] [2023-08-27 08:06:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:50,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:51,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:51,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120954272] [2023-08-27 08:06:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120954272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:51,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530130492] [2023-08-27 08:06:51,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:51,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:51,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:51,275 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) [2023-08-27 08:06:51,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 08:06:51,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:06:51,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:51,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:06:51,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:06:51,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:51,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530130492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:51,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:51,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2023-08-27 08:06:51,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548754633] [2023-08-27 08:06:51,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:51,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:06:51,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:06:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:06:51,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 08:06:51,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 349 transitions, 3868 flow. Second operand has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:51,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:51,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 08:06:51,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:52,382 INFO L124 PetriNetUnfolderBase]: 3350/5393 cut-off events. [2023-08-27 08:06:52,382 INFO L125 PetriNetUnfolderBase]: For 28236/28358 co-relation queries the response was YES. [2023-08-27 08:06:52,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26171 conditions, 5393 events. 3350/5393 cut-off events. For 28236/28358 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31354 event pairs, 1222 based on Foata normal form. 135/4900 useless extension candidates. Maximal degree in co-relation 26118. Up to 4160 conditions per place. [2023-08-27 08:06:52,411 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 357 selfloop transitions, 61 changer transitions 0/420 dead transitions. [2023-08-27 08:06:52,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 420 transitions, 5394 flow [2023-08-27 08:06:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:06:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:06:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1003 transitions. [2023-08-27 08:06:52,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880715705765407 [2023-08-27 08:06:52,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1003 transitions. [2023-08-27 08:06:52,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1003 transitions. [2023-08-27 08:06:52,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:52,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1003 transitions. [2023-08-27 08:06:52,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:52,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:52,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:52,416 INFO L175 Difference]: Start difference. First operand has 151 places, 349 transitions, 3868 flow. Second operand 5 states and 1003 transitions. [2023-08-27 08:06:52,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 420 transitions, 5394 flow [2023-08-27 08:06:52,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 420 transitions, 5316 flow, removed 34 selfloop flow, removed 3 redundant places. [2023-08-27 08:06:52,511 INFO L231 Difference]: Finished difference. Result has 154 places, 359 transitions, 4104 flow [2023-08-27 08:06:52,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=3784, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4104, PETRI_PLACES=154, PETRI_TRANSITIONS=359} [2023-08-27 08:06:52,512 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2023-08-27 08:06:52,512 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 359 transitions, 4104 flow [2023-08-27 08:06:52,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:52,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:52,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:52,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:52,718 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,SelfDestructingSolverStorable19 [2023-08-27 08:06:52,719 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:52,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1665814010, now seen corresponding path program 1 times [2023-08-27 08:06:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:52,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573865482] [2023-08-27 08:06:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:53,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573865482] [2023-08-27 08:06:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573865482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376861305] [2023-08-27 08:06:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:53,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:53,199 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) [2023-08-27 08:06:53,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 08:06:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:53,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:06:53,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:06:53,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376861305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:53,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:53,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 08:06:53,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197544562] [2023-08-27 08:06:53,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:53,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:06:53,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:53,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:06:53,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:06:53,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 08:06:53,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 359 transitions, 4104 flow. Second operand has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:53,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:53,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 08:06:53,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:54,313 INFO L124 PetriNetUnfolderBase]: 3655/5843 cut-off events. [2023-08-27 08:06:54,313 INFO L125 PetriNetUnfolderBase]: For 33042/33158 co-relation queries the response was YES. [2023-08-27 08:06:54,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29047 conditions, 5843 events. 3655/5843 cut-off events. For 33042/33158 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34071 event pairs, 1189 based on Foata normal form. 136/5301 useless extension candidates. Maximal degree in co-relation 28991. Up to 4414 conditions per place. [2023-08-27 08:06:54,350 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 351 selfloop transitions, 74 changer transitions 0/427 dead transitions. [2023-08-27 08:06:54,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 427 transitions, 5593 flow [2023-08-27 08:06:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:06:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:06:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1006 transitions. [2023-08-27 08:06:54,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-27 08:06:54,352 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1006 transitions. [2023-08-27 08:06:54,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1006 transitions. [2023-08-27 08:06:54,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:54,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1006 transitions. [2023-08-27 08:06:54,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,355 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,355 INFO L175 Difference]: Start difference. First operand has 154 places, 359 transitions, 4104 flow. Second operand 5 states and 1006 transitions. [2023-08-27 08:06:54,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 427 transitions, 5593 flow [2023-08-27 08:06:54,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 427 transitions, 5530 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:54,495 INFO L231 Difference]: Finished difference. Result has 158 places, 371 transitions, 4448 flow [2023-08-27 08:06:54,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=4029, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4448, PETRI_PLACES=158, PETRI_TRANSITIONS=371} [2023-08-27 08:06:54,496 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2023-08-27 08:06:54,496 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 371 transitions, 4448 flow [2023-08-27 08:06:54,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:54,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:54,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:54,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:54,697 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:54,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:54,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1797020866, now seen corresponding path program 2 times [2023-08-27 08:06:54,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:54,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859267166] [2023-08-27 08:06:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:54,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:55,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:55,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859267166] [2023-08-27 08:06:55,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859267166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:55,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149848373] [2023-08-27 08:06:55,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:55,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:55,137 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) [2023-08-27 08:06:55,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 08:06:55,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:06:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:55,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 08:06:55,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:55,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:55,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:06:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:06:55,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:55,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149848373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:55,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:55,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 08:06:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804585654] [2023-08-27 08:06:55,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:55,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:06:55,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:06:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:06:55,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:06:55,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 371 transitions, 4448 flow. Second operand has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:55,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:55,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:06:55,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:56,388 INFO L124 PetriNetUnfolderBase]: 4017/6414 cut-off events. [2023-08-27 08:06:56,388 INFO L125 PetriNetUnfolderBase]: For 38281/38397 co-relation queries the response was YES. [2023-08-27 08:06:56,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31994 conditions, 6414 events. 4017/6414 cut-off events. For 38281/38397 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37812 event pairs, 1315 based on Foata normal form. 146/5786 useless extension candidates. Maximal degree in co-relation 31936. Up to 4646 conditions per place. [2023-08-27 08:06:56,436 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 324 selfloop transitions, 122 changer transitions 0/448 dead transitions. [2023-08-27 08:06:56,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 448 transitions, 6021 flow [2023-08-27 08:06:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:06:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:06:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1319 transitions. [2023-08-27 08:06:56,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3746094859414939 [2023-08-27 08:06:56,438 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1319 transitions. [2023-08-27 08:06:56,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1319 transitions. [2023-08-27 08:06:56,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:56,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1319 transitions. [2023-08-27 08:06:56,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.42857142857142) internal successors, (1319), 7 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:56,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:56,441 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:56,441 INFO L175 Difference]: Start difference. First operand has 158 places, 371 transitions, 4448 flow. Second operand 7 states and 1319 transitions. [2023-08-27 08:06:56,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 448 transitions, 6021 flow [2023-08-27 08:06:56,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 448 transitions, 5932 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-27 08:06:56,587 INFO L231 Difference]: Finished difference. Result has 165 places, 384 transitions, 4952 flow [2023-08-27 08:06:56,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4952, PETRI_PLACES=165, PETRI_TRANSITIONS=384} [2023-08-27 08:06:56,588 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 113 predicate places. [2023-08-27 08:06:56,588 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 384 transitions, 4952 flow [2023-08-27 08:06:56,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:56,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:56,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:56,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:56,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:56,789 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:56,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:56,789 INFO L85 PathProgramCache]: Analyzing trace with hash 100628549, now seen corresponding path program 2 times [2023-08-27 08:06:56,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:56,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63533244] [2023-08-27 08:06:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:56,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63533244] [2023-08-27 08:06:57,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63533244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691311681] [2023-08-27 08:06:57,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:57,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:57,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:57,237 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) [2023-08-27 08:06:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 08:06:57,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:06:57,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:57,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:06:57,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:06:57,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:57,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691311681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:57,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:57,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-27 08:06:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454894618] [2023-08-27 08:06:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:57,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:06:57,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:06:57,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:06:57,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 08:06:57,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 384 transitions, 4952 flow. Second operand has 6 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:57,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:57,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 08:06:57,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:58,363 INFO L124 PetriNetUnfolderBase]: 3676/5879 cut-off events. [2023-08-27 08:06:58,363 INFO L125 PetriNetUnfolderBase]: For 41122/41238 co-relation queries the response was YES. [2023-08-27 08:06:58,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30511 conditions, 5879 events. 3676/5879 cut-off events. For 41122/41238 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34311 event pairs, 1184 based on Foata normal form. 236/5437 useless extension candidates. Maximal degree in co-relation 30450. Up to 4626 conditions per place. [2023-08-27 08:06:58,411 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 357 selfloop transitions, 65 changer transitions 0/424 dead transitions. [2023-08-27 08:06:58,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 424 transitions, 6122 flow [2023-08-27 08:06:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:06:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:06:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2023-08-27 08:06:58,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984095427435388 [2023-08-27 08:06:58,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2023-08-27 08:06:58,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2023-08-27 08:06:58,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:58,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2023-08-27 08:06:58,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:58,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:58,417 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:58,417 INFO L175 Difference]: Start difference. First operand has 165 places, 384 transitions, 4952 flow. Second operand 5 states and 1002 transitions. [2023-08-27 08:06:58,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 424 transitions, 6122 flow [2023-08-27 08:06:58,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 424 transitions, 5975 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-27 08:06:58,636 INFO L231 Difference]: Finished difference. Result has 165 places, 384 transitions, 4960 flow [2023-08-27 08:06:58,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=4791, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4960, PETRI_PLACES=165, PETRI_TRANSITIONS=384} [2023-08-27 08:06:58,636 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 113 predicate places. [2023-08-27 08:06:58,636 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 384 transitions, 4960 flow [2023-08-27 08:06:58,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:58,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:58,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:58,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:58,838 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,SelfDestructingSolverStorable22 [2023-08-27 08:06:58,838 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:06:58,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:58,838 INFO L85 PathProgramCache]: Analyzing trace with hash 100719689, now seen corresponding path program 3 times [2023-08-27 08:06:58,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:58,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803999915] [2023-08-27 08:06:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:58,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:59,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:59,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803999915] [2023-08-27 08:06:59,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803999915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:59,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526564456] [2023-08-27 08:06:59,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:06:59,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:59,410 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) [2023-08-27 08:06:59,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 08:06:59,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:06:59,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:59,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:06:59,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:59,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:59,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:06:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:06:59,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:06:59,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526564456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:06:59,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:06:59,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 08:06:59,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983169711] [2023-08-27 08:06:59,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:06:59,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:06:59,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:06:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:06:59,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:06:59,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 384 transitions, 4960 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:59,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:59,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:06:59,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:00,766 INFO L124 PetriNetUnfolderBase]: 4040/6423 cut-off events. [2023-08-27 08:07:00,766 INFO L125 PetriNetUnfolderBase]: For 44204/44320 co-relation queries the response was YES. [2023-08-27 08:07:00,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33545 conditions, 6423 events. 4040/6423 cut-off events. For 44204/44320 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37902 event pairs, 1140 based on Foata normal form. 148/5833 useless extension candidates. Maximal degree in co-relation 33484. Up to 4626 conditions per place. [2023-08-27 08:07:00,810 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 376 selfloop transitions, 54 changer transitions 0/432 dead transitions. [2023-08-27 08:07:00,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 432 transitions, 6259 flow [2023-08-27 08:07:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:07:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:07:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1130 transitions. [2023-08-27 08:07:00,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3744201457919152 [2023-08-27 08:07:00,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1130 transitions. [2023-08-27 08:07:00,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1130 transitions. [2023-08-27 08:07:00,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:00,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1130 transitions. [2023-08-27 08:07:00,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.33333333333334) internal successors, (1130), 6 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:00,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:00,814 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:00,815 INFO L175 Difference]: Start difference. First operand has 165 places, 384 transitions, 4960 flow. Second operand 6 states and 1130 transitions. [2023-08-27 08:07:00,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 432 transitions, 6259 flow [2023-08-27 08:07:00,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 432 transitions, 6132 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-27 08:07:00,984 INFO L231 Difference]: Finished difference. Result has 168 places, 388 transitions, 5049 flow [2023-08-27 08:07:00,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5049, PETRI_PLACES=168, PETRI_TRANSITIONS=388} [2023-08-27 08:07:00,984 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2023-08-27 08:07:00,984 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 388 transitions, 5049 flow [2023-08-27 08:07:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:00,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:00,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:00,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 08:07:01,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:01,186 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:07:01,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash 100719851, now seen corresponding path program 1 times [2023-08-27 08:07:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:01,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623362790] [2023-08-27 08:07:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:01,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:01,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:01,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623362790] [2023-08-27 08:07:01,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623362790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:07:01,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106425029] [2023-08-27 08:07:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:01,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:01,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:07:01,881 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) [2023-08-27 08:07:01,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 08:07:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:02,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 08:07:02,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:07:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:02,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:07:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:07:02,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:07:02,423 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1045 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1045) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 08:07:02,440 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:07:02,440 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 46 treesize of output 38 [2023-08-27 08:07:02,455 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 11 treesize of output 5 [2023-08-27 08:07:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:07:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106425029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:07:02,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:07:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-27 08:07:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044095475] [2023-08-27 08:07:02,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:07:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:07:02,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:07:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=474, Unknown=1, NotChecked=44, Total=600 [2023-08-27 08:07:02,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 503 [2023-08-27 08:07:02,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 388 transitions, 5049 flow. Second operand has 25 states, 25 states have (on average 155.56) internal successors, (3889), 25 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:02,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:02,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 503 [2023-08-27 08:07:02,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:09,793 INFO L124 PetriNetUnfolderBase]: 4639/7358 cut-off events. [2023-08-27 08:07:09,793 INFO L125 PetriNetUnfolderBase]: For 59280/59424 co-relation queries the response was YES. [2023-08-27 08:07:09,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39713 conditions, 7358 events. 4639/7358 cut-off events. For 59280/59424 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44902 event pairs, 778 based on Foata normal form. 169/6769 useless extension candidates. Maximal degree in co-relation 39651. Up to 2880 conditions per place. [2023-08-27 08:07:09,854 INFO L140 encePairwiseOnDemand]: 485/503 looper letters, 484 selfloop transitions, 217 changer transitions 0/703 dead transitions. [2023-08-27 08:07:09,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 703 transitions, 9268 flow [2023-08-27 08:07:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:07:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:07:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3756 transitions. [2023-08-27 08:07:09,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3246607312645864 [2023-08-27 08:07:09,859 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3756 transitions. [2023-08-27 08:07:09,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3756 transitions. [2023-08-27 08:07:09,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:09,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3756 transitions. [2023-08-27 08:07:09,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 163.30434782608697) internal successors, (3756), 23 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:09,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 503.0) internal successors, (12072), 24 states have internal predecessors, (12072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:09,876 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 503.0) internal successors, (12072), 24 states have internal predecessors, (12072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:09,877 INFO L175 Difference]: Start difference. First operand has 168 places, 388 transitions, 5049 flow. Second operand 23 states and 3756 transitions. [2023-08-27 08:07:09,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 703 transitions, 9268 flow [2023-08-27 08:07:10,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 703 transitions, 9217 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 08:07:10,227 INFO L231 Difference]: Finished difference. Result has 200 places, 483 transitions, 7244 flow [2023-08-27 08:07:10,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7244, PETRI_PLACES=200, PETRI_TRANSITIONS=483} [2023-08-27 08:07:10,228 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 148 predicate places. [2023-08-27 08:07:10,228 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 483 transitions, 7244 flow [2023-08-27 08:07:10,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 155.56) internal successors, (3889), 25 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:10,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:10,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:10,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 08:07:10,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:10,435 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:07:10,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:10,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1467218235, now seen corresponding path program 1 times [2023-08-27 08:07:10,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:10,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417744088] [2023-08-27 08:07:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:10,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:07:10,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:10,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417744088] [2023-08-27 08:07:10,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417744088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:07:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062020138] [2023-08-27 08:07:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:10,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:07:10,885 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) [2023-08-27 08:07:10,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 08:07:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:11,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:07:11,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:07:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:11,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:11,055 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 08:07:11,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-27 08:07:11,108 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 [2023-08-27 08:07:11,165 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:07:11,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 08:07:11,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:07:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:11,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:07:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:11,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:07:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:11,498 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:07:11,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:07:11,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:07:11,543 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 19 treesize of output 12 [2023-08-27 08:07:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:11,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:07:11,609 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1107 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1107) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 08:07:11,950 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:07:11,951 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 37 treesize of output 38 [2023-08-27 08:07:11,962 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:07:11,962 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 341 treesize of output 333 [2023-08-27 08:07:11,970 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 296 [2023-08-27 08:07:11,980 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 296 treesize of output 248 [2023-08-27 08:07:11,991 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 248 treesize of output 236 [2023-08-27 08:07:12,002 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 120 treesize of output 114 [2023-08-27 08:07:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:12,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062020138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:07:12,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:07:12,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2023-08-27 08:07:12,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179222089] [2023-08-27 08:07:12,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:07:12,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:07:12,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:07:12,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=649, Unknown=11, NotChecked=52, Total=812 [2023-08-27 08:07:12,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 503 [2023-08-27 08:07:12,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 483 transitions, 7244 flow. Second operand has 29 states, 29 states have (on average 146.3448275862069) internal successors, (4244), 29 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:12,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:12,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 503 [2023-08-27 08:07:12,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:47,358 WARN L234 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 99 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:07:49,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:07:51,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:00,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:02,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:05,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:13,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:15,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:18,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:20,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:22,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:24,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:26,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:29,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:08:30,586 INFO L124 PetriNetUnfolderBase]: 5953/9378 cut-off events. [2023-08-27 08:08:30,586 INFO L125 PetriNetUnfolderBase]: For 98837/99001 co-relation queries the response was YES. [2023-08-27 08:08:30,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56918 conditions, 9378 events. 5953/9378 cut-off events. For 98837/99001 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59432 event pairs, 881 based on Foata normal form. 251/8709 useless extension candidates. Maximal degree in co-relation 56843. Up to 3873 conditions per place. [2023-08-27 08:08:30,678 INFO L140 encePairwiseOnDemand]: 478/503 looper letters, 528 selfloop transitions, 332 changer transitions 0/862 dead transitions. [2023-08-27 08:08:30,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 862 transitions, 12112 flow [2023-08-27 08:08:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 08:08:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 08:08:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5994 transitions. [2023-08-27 08:08:30,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3055513075393791 [2023-08-27 08:08:30,686 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5994 transitions. [2023-08-27 08:08:30,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5994 transitions. [2023-08-27 08:08:30,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:30,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5994 transitions. [2023-08-27 08:08:30,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 153.69230769230768) internal successors, (5994), 39 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:30,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 503.0) internal successors, (20120), 40 states have internal predecessors, (20120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:30,709 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 503.0) internal successors, (20120), 40 states have internal predecessors, (20120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:30,709 INFO L175 Difference]: Start difference. First operand has 200 places, 483 transitions, 7244 flow. Second operand 39 states and 5994 transitions. [2023-08-27 08:08:30,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 862 transitions, 12112 flow [2023-08-27 08:08:31,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 862 transitions, 11841 flow, removed 97 selfloop flow, removed 6 redundant places. [2023-08-27 08:08:31,570 INFO L231 Difference]: Finished difference. Result has 244 places, 613 transitions, 9873 flow [2023-08-27 08:08:31,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=6958, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9873, PETRI_PLACES=244, PETRI_TRANSITIONS=613} [2023-08-27 08:08:31,571 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 192 predicate places. [2023-08-27 08:08:31,571 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 613 transitions, 9873 flow [2023-08-27 08:08:31,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 146.3448275862069) internal successors, (4244), 29 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:31,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:31,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:31,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-27 08:08:31,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:31,772 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:08:31,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:31,772 INFO L85 PathProgramCache]: Analyzing trace with hash -326782173, now seen corresponding path program 2 times [2023-08-27 08:08:31,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355896877] [2023-08-27 08:08:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:08:32,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:32,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355896877] [2023-08-27 08:08:32,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355896877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:32,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200851765] [2023-08-27 08:08:32,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:08:32,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:32,349 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) [2023-08-27 08:08:32,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 08:08:32,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:08:32,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:32,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:08:32,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:32,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:08:32,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:08:32,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200851765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:08:32,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:08:32,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 08:08:32,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468799951] [2023-08-27 08:08:32,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:08:32,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:08:32,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:08:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:08:32,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:08:32,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 613 transitions, 9873 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:32,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:32,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:08:32,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:34,817 INFO L124 PetriNetUnfolderBase]: 6099/9589 cut-off events. [2023-08-27 08:08:34,817 INFO L125 PetriNetUnfolderBase]: For 136642/136808 co-relation queries the response was YES. [2023-08-27 08:08:34,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70356 conditions, 9589 events. 6099/9589 cut-off events. For 136642/136808 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 60181 event pairs, 1659 based on Foata normal form. 192/8865 useless extension candidates. Maximal degree in co-relation 70270. Up to 7341 conditions per place. [2023-08-27 08:08:34,907 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 555 selfloop transitions, 133 changer transitions 0/690 dead transitions. [2023-08-27 08:08:34,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 690 transitions, 12238 flow [2023-08-27 08:08:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:08:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:08:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1309 transitions. [2023-08-27 08:08:34,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717693836978131 [2023-08-27 08:08:34,910 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1309 transitions. [2023-08-27 08:08:34,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1309 transitions. [2023-08-27 08:08:34,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:34,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1309 transitions. [2023-08-27 08:08:34,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:34,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:34,914 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:34,914 INFO L175 Difference]: Start difference. First operand has 244 places, 613 transitions, 9873 flow. Second operand 7 states and 1309 transitions. [2023-08-27 08:08:34,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 690 transitions, 12238 flow [2023-08-27 08:08:35,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 690 transitions, 11862 flow, removed 156 selfloop flow, removed 13 redundant places. [2023-08-27 08:08:35,785 INFO L231 Difference]: Finished difference. Result has 239 places, 623 transitions, 10120 flow [2023-08-27 08:08:35,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10120, PETRI_PLACES=239, PETRI_TRANSITIONS=623} [2023-08-27 08:08:35,785 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 187 predicate places. [2023-08-27 08:08:35,786 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 623 transitions, 10120 flow [2023-08-27 08:08:35,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:35,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:35,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:35,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-27 08:08:35,988 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,SelfDestructingSolverStorable26 [2023-08-27 08:08:35,989 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:08:35,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash -510843399, now seen corresponding path program 1 times [2023-08-27 08:08:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630927349] [2023-08-27 08:08:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:35,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:08:36,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:36,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630927349] [2023-08-27 08:08:36,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630927349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:36,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084906903] [2023-08-27 08:08:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:36,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:36,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:36,568 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) [2023-08-27 08:08:36,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 08:08:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:36,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:08:36,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:36,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:36,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:08:36,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:08:36,956 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1217 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1217) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 08:08:36,968 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:08:36,969 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 46 treesize of output 38 [2023-08-27 08:08:36,973 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 11 treesize of output 5 [2023-08-27 08:08:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:08:37,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084906903] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:37,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:08:37,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-08-27 08:08:37,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737615086] [2023-08-27 08:08:37,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:08:37,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:08:37,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:08:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=405, Unknown=1, NotChecked=40, Total=506 [2023-08-27 08:08:37,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:08:37,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 623 transitions, 10120 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:37,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:37,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:08:37,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:39,371 INFO L124 PetriNetUnfolderBase]: 6203/9756 cut-off events. [2023-08-27 08:08:39,371 INFO L125 PetriNetUnfolderBase]: For 145769/145935 co-relation queries the response was YES. [2023-08-27 08:08:39,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72175 conditions, 9756 events. 6203/9756 cut-off events. For 145769/145935 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 61505 event pairs, 1308 based on Foata normal form. 172/9012 useless extension candidates. Maximal degree in co-relation 72090. Up to 6774 conditions per place. [2023-08-27 08:08:39,467 INFO L140 encePairwiseOnDemand]: 486/503 looper letters, 517 selfloop transitions, 163 changer transitions 0/682 dead transitions. [2023-08-27 08:08:39,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 682 transitions, 12308 flow [2023-08-27 08:08:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:08:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:08:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1311 transitions. [2023-08-27 08:08:39,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37233740414654926 [2023-08-27 08:08:39,469 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1311 transitions. [2023-08-27 08:08:39,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1311 transitions. [2023-08-27 08:08:39,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:39,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1311 transitions. [2023-08-27 08:08:39,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.28571428571428) internal successors, (1311), 7 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) [2023-08-27 08:08:39,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:39,472 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:39,472 INFO L175 Difference]: Start difference. First operand has 239 places, 623 transitions, 10120 flow. Second operand 7 states and 1311 transitions. [2023-08-27 08:08:39,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 682 transitions, 12308 flow [2023-08-27 08:08:40,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 682 transitions, 12107 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-27 08:08:40,373 INFO L231 Difference]: Finished difference. Result has 244 places, 638 transitions, 10793 flow [2023-08-27 08:08:40,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=9919, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10793, PETRI_PLACES=244, PETRI_TRANSITIONS=638} [2023-08-27 08:08:40,374 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 192 predicate places. [2023-08-27 08:08:40,374 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 638 transitions, 10793 flow [2023-08-27 08:08:40,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:40,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:40,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:40,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 08:08:40,580 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,SelfDestructingSolverStorable27 [2023-08-27 08:08:40,580 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:08:40,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1161303089, now seen corresponding path program 2 times [2023-08-27 08:08:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:40,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208586394] [2023-08-27 08:08:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:40,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:08:41,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:41,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208586394] [2023-08-27 08:08:41,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208586394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:41,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963190502] [2023-08-27 08:08:41,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:08:41,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:41,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:41,193 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) [2023-08-27 08:08:41,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 08:08:41,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:08:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:41,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 08:08:41,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:41,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:41,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:08:41,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:08:41,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963190502] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:08:41,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:08:41,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-27 08:08:41,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089705865] [2023-08-27 08:08:41,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:08:41,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:08:41,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:41,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:08:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:08:41,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:08:41,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 638 transitions, 10793 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:41,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:41,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:08:41,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:43,856 INFO L124 PetriNetUnfolderBase]: 6587/10462 cut-off events. [2023-08-27 08:08:43,856 INFO L125 PetriNetUnfolderBase]: For 166824/166990 co-relation queries the response was YES. [2023-08-27 08:08:43,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77698 conditions, 10462 events. 6587/10462 cut-off events. For 166824/166990 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 67658 event pairs, 1909 based on Foata normal form. 182/9572 useless extension candidates. Maximal degree in co-relation 77610. Up to 8754 conditions per place. [2023-08-27 08:08:43,944 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 606 selfloop transitions, 104 changer transitions 0/712 dead transitions. [2023-08-27 08:08:43,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 712 transitions, 13121 flow [2023-08-27 08:08:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:08:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:08:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1314 transitions. [2023-08-27 08:08:43,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3731894348196535 [2023-08-27 08:08:43,946 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1314 transitions. [2023-08-27 08:08:43,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1314 transitions. [2023-08-27 08:08:43,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:43,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1314 transitions. [2023-08-27 08:08:43,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.71428571428572) internal successors, (1314), 7 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:43,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:43,950 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:43,950 INFO L175 Difference]: Start difference. First operand has 244 places, 638 transitions, 10793 flow. Second operand 7 states and 1314 transitions. [2023-08-27 08:08:43,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 712 transitions, 13121 flow [2023-08-27 08:08:45,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 712 transitions, 12903 flow, removed 49 selfloop flow, removed 3 redundant places. [2023-08-27 08:08:45,207 INFO L231 Difference]: Finished difference. Result has 250 places, 646 transitions, 11057 flow [2023-08-27 08:08:45,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=10575, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11057, PETRI_PLACES=250, PETRI_TRANSITIONS=646} [2023-08-27 08:08:45,208 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 198 predicate places. [2023-08-27 08:08:45,208 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 646 transitions, 11057 flow [2023-08-27 08:08:45,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:45,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:45,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:45,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 08:08:45,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 08:08:45,410 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:08:45,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:45,411 INFO L85 PathProgramCache]: Analyzing trace with hash -310158795, now seen corresponding path program 2 times [2023-08-27 08:08:45,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:45,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156434891] [2023-08-27 08:08:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:45,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:46,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:46,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156434891] [2023-08-27 08:08:46,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156434891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:46,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687462891] [2023-08-27 08:08:46,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:08:46,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:46,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:46,297 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) [2023-08-27 08:08:46,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 08:08:46,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:08:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:46,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:08:46,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:46,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:08:46,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:08:46,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687462891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:08:46,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:08:46,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 08:08:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992461026] [2023-08-27 08:08:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:08:46,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:08:46,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:46,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:08:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:08:46,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:08:46,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 646 transitions, 11057 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:46,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:46,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:08:46,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:49,235 INFO L124 PetriNetUnfolderBase]: 6539/10372 cut-off events. [2023-08-27 08:08:49,235 INFO L125 PetriNetUnfolderBase]: For 168204/168370 co-relation queries the response was YES. [2023-08-27 08:08:49,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78060 conditions, 10372 events. 6539/10372 cut-off events. For 168204/168370 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 66844 event pairs, 1894 based on Foata normal form. 172/9496 useless extension candidates. Maximal degree in co-relation 77968. Up to 8754 conditions per place. [2023-08-27 08:08:49,332 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 604 selfloop transitions, 104 changer transitions 0/710 dead transitions. [2023-08-27 08:08:49,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 710 transitions, 13197 flow [2023-08-27 08:08:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:08:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:08:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1313 transitions. [2023-08-27 08:08:49,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729054245952854 [2023-08-27 08:08:49,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1313 transitions. [2023-08-27 08:08:49,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1313 transitions. [2023-08-27 08:08:49,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:49,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1313 transitions. [2023-08-27 08:08:49,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:49,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:49,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:49,339 INFO L175 Difference]: Start difference. First operand has 250 places, 646 transitions, 11057 flow. Second operand 7 states and 1313 transitions. [2023-08-27 08:08:49,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 710 transitions, 13197 flow [2023-08-27 08:08:50,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 710 transitions, 13049 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-27 08:08:50,511 INFO L231 Difference]: Finished difference. Result has 254 places, 646 transitions, 11135 flow [2023-08-27 08:08:50,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=10909, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11135, PETRI_PLACES=254, PETRI_TRANSITIONS=646} [2023-08-27 08:08:50,512 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 202 predicate places. [2023-08-27 08:08:50,512 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 646 transitions, 11135 flow [2023-08-27 08:08:50,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:50,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:50,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:50,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 08:08:50,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:50,718 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:08:50,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -124124889, now seen corresponding path program 3 times [2023-08-27 08:08:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:50,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254829155] [2023-08-27 08:08:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:50,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:51,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254829155] [2023-08-27 08:08:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254829155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765049605] [2023-08-27 08:08:51,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:08:51,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:51,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:51,558 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) [2023-08-27 08:08:51,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 08:08:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:08:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:51,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 08:08:51,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:51,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:51,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:08:52,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:08:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765049605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:08:52,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:08:52,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-08-27 08:08:52,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431659666] [2023-08-27 08:08:52,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:08:52,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 08:08:52,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 08:08:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-08-27 08:08:52,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 08:08:52,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 646 transitions, 11135 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:52,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:52,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 08:08:52,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:54,692 INFO L124 PetriNetUnfolderBase]: 6704/10651 cut-off events. [2023-08-27 08:08:54,692 INFO L125 PetriNetUnfolderBase]: For 173461/173627 co-relation queries the response was YES. [2023-08-27 08:08:54,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79935 conditions, 10651 events. 6704/10651 cut-off events. For 173461/173627 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 69171 event pairs, 1770 based on Foata normal form. 192/9747 useless extension candidates. Maximal degree in co-relation 79842. Up to 6982 conditions per place. [2023-08-27 08:08:54,785 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 570 selfloop transitions, 158 changer transitions 1/731 dead transitions. [2023-08-27 08:08:54,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 731 transitions, 13600 flow [2023-08-27 08:08:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:08:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:08:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1298 transitions. [2023-08-27 08:08:54,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36864527122976426 [2023-08-27 08:08:54,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1298 transitions. [2023-08-27 08:08:54,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1298 transitions. [2023-08-27 08:08:54,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:54,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1298 transitions. [2023-08-27 08:08:54,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.42857142857142) internal successors, (1298), 7 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:54,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:54,791 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:54,791 INFO L175 Difference]: Start difference. First operand has 254 places, 646 transitions, 11135 flow. Second operand 7 states and 1298 transitions. [2023-08-27 08:08:54,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 731 transitions, 13600 flow [2023-08-27 08:08:55,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 731 transitions, 13392 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 08:08:55,866 INFO L231 Difference]: Finished difference. Result has 257 places, 653 transitions, 11597 flow [2023-08-27 08:08:55,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=10927, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11597, PETRI_PLACES=257, PETRI_TRANSITIONS=653} [2023-08-27 08:08:55,867 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2023-08-27 08:08:55,867 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 653 transitions, 11597 flow [2023-08-27 08:08:55,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:55,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:55,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:55,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-27 08:08:56,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:56,072 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:08:56,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:56,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1331637835, now seen corresponding path program 3 times [2023-08-27 08:08:56,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:56,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847424576] [2023-08-27 08:08:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:08:56,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847424576] [2023-08-27 08:08:56,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847424576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539201808] [2023-08-27 08:08:56,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:08:56,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:56,741 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) [2023-08-27 08:08:56,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 08:08:56,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:08:56,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:56,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 08:08:56,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:57,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:57,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:57,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:57,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:08:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:08:57,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:08:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539201808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:08:57,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:08:57,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-08-27 08:08:57,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856629737] [2023-08-27 08:08:57,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:08:57,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 08:08:57,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 08:08:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:08:57,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 08:08:57,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 653 transitions, 11597 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:57,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:57,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 08:08:57,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:59,513 INFO L124 PetriNetUnfolderBase]: 6795/10843 cut-off events. [2023-08-27 08:08:59,513 INFO L125 PetriNetUnfolderBase]: For 183495/183661 co-relation queries the response was YES. [2023-08-27 08:08:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82499 conditions, 10843 events. 6795/10843 cut-off events. For 183495/183661 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 71002 event pairs, 1857 based on Foata normal form. 172/9859 useless extension candidates. Maximal degree in co-relation 82403. Up to 8417 conditions per place. [2023-08-27 08:08:59,621 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 608 selfloop transitions, 112 changer transitions 0/722 dead transitions. [2023-08-27 08:08:59,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 722 transitions, 13832 flow [2023-08-27 08:08:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:08:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:08:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1293 transitions. [2023-08-27 08:08:59,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672252201079239 [2023-08-27 08:08:59,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1293 transitions. [2023-08-27 08:08:59,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1293 transitions. [2023-08-27 08:08:59,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:59,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1293 transitions. [2023-08-27 08:08:59,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.71428571428572) internal successors, (1293), 7 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:59,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:59,627 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:59,627 INFO L175 Difference]: Start difference. First operand has 257 places, 653 transitions, 11597 flow. Second operand 7 states and 1293 transitions. [2023-08-27 08:08:59,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 722 transitions, 13832 flow [2023-08-27 08:09:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 722 transitions, 13617 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-08-27 08:09:00,932 INFO L231 Difference]: Finished difference. Result has 260 places, 658 transitions, 11797 flow [2023-08-27 08:09:00,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=11363, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11797, PETRI_PLACES=260, PETRI_TRANSITIONS=658} [2023-08-27 08:09:00,933 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 208 predicate places. [2023-08-27 08:09:00,933 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 658 transitions, 11797 flow [2023-08-27 08:09:00,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:00,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:09:00,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:09:00,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 08:09:01,135 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,SelfDestructingSolverStorable31 [2023-08-27 08:09:01,135 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:09:01,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:09:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1331637997, now seen corresponding path program 3 times [2023-08-27 08:09:01,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:09:01,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339144579] [2023-08-27 08:09:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:09:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:01,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:09:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339144579] [2023-08-27 08:09:01,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339144579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:09:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040461994] [2023-08-27 08:09:01,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:09:01,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:01,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:09:01,653 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) [2023-08-27 08:09:01,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 08:09:01,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:09:01,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:09:01,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 08:09:01,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:09:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:09:02,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:09:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:09:02,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:09:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:09:02,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:09:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040461994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:09:02,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:09:02,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-08-27 08:09:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002771974] [2023-08-27 08:09:02,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:09:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 08:09:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:09:02,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 08:09:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:09:02,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 08:09:02,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 658 transitions, 11797 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:02,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:09:02,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 08:09:02,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:09:05,071 INFO L124 PetriNetUnfolderBase]: 6737/10742 cut-off events. [2023-08-27 08:09:05,071 INFO L125 PetriNetUnfolderBase]: For 185582/185748 co-relation queries the response was YES. [2023-08-27 08:09:05,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82095 conditions, 10742 events. 6737/10742 cut-off events. For 185582/185748 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 69951 event pairs, 1964 based on Foata normal form. 182/9792 useless extension candidates. Maximal degree in co-relation 81998. Up to 8417 conditions per place. [2023-08-27 08:09:05,185 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 605 selfloop transitions, 112 changer transitions 0/719 dead transitions. [2023-08-27 08:09:05,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 719 transitions, 13851 flow [2023-08-27 08:09:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:09:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:09:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1292 transitions. [2023-08-27 08:09:05,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36694120988355583 [2023-08-27 08:09:05,187 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1292 transitions. [2023-08-27 08:09:05,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1292 transitions. [2023-08-27 08:09:05,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:09:05,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1292 transitions. [2023-08-27 08:09:05,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:05,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:05,191 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:05,191 INFO L175 Difference]: Start difference. First operand has 260 places, 658 transitions, 11797 flow. Second operand 7 states and 1292 transitions. [2023-08-27 08:09:05,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 719 transitions, 13851 flow [2023-08-27 08:09:06,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 719 transitions, 13750 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-27 08:09:06,525 INFO L231 Difference]: Finished difference. Result has 264 places, 657 transitions, 11919 flow [2023-08-27 08:09:06,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=11668, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11919, PETRI_PLACES=264, PETRI_TRANSITIONS=657} [2023-08-27 08:09:06,525 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 212 predicate places. [2023-08-27 08:09:06,525 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 657 transitions, 11919 flow [2023-08-27 08:09:06,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:06,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:09:06,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:09:06,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-27 08:09:06,726 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,SelfDestructingSolverStorable32 [2023-08-27 08:09:06,726 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:09:06,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:09:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash -124125051, now seen corresponding path program 4 times [2023-08-27 08:09:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:09:06,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871451291] [2023-08-27 08:09:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:09:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:07,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:09:07,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871451291] [2023-08-27 08:09:07,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871451291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:09:07,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644776582] [2023-08-27 08:09:07,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:09:07,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:09:07,200 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) [2023-08-27 08:09:07,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 08:09:07,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:09:07,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:09:07,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-27 08:09:07,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:09:07,378 INFO L322 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2023-08-27 08:09:07,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 21 [2023-08-27 08:09:07,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:09:07,440 INFO L322 Elim1Store]: treesize reduction 32, result has 22.0 percent of original size [2023-08-27 08:09:07,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 21 treesize of output 21 [2023-08-27 08:09:07,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:09:07,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:09:07,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:09:07,628 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:09:07,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:09:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:07,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:09:07,859 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1548 (Array Int Int)) (~q2_back~0 Int)) (or (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1548) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))))) (< ~q2_back~0 0) (<= c_~n2~0 ~q2_back~0))) is different from false [2023-08-27 08:09:08,010 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:09:08,010 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 34 treesize of output 35 [2023-08-27 08:09:08,020 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:09:08,021 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 343 treesize of output 327 [2023-08-27 08:09:08,028 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 152 treesize of output 128 [2023-08-27 08:09:08,037 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 61 treesize of output 55 [2023-08-27 08:09:08,043 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 66 treesize of output 54 [2023-08-27 08:09:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644776582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:09:08,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:09:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-27 08:09:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699280084] [2023-08-27 08:09:08,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:09:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 08:09:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:09:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 08:09:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=4, NotChecked=42, Total=552 [2023-08-27 08:09:08,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 503 [2023-08-27 08:09:08,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 657 transitions, 11919 flow. Second operand has 24 states, 24 states have (on average 147.625) internal successors, (3543), 24 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:08,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:09:08,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 503 [2023-08-27 08:09:08,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:09:15,036 INFO L124 PetriNetUnfolderBase]: 13487/21551 cut-off events. [2023-08-27 08:09:15,036 INFO L125 PetriNetUnfolderBase]: For 350805/351071 co-relation queries the response was YES. [2023-08-27 08:09:15,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158735 conditions, 21551 events. 13487/21551 cut-off events. For 350805/351071 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 157740 event pairs, 4661 based on Foata normal form. 370/19179 useless extension candidates. Maximal degree in co-relation 158637. Up to 10595 conditions per place. [2023-08-27 08:09:15,350 INFO L140 encePairwiseOnDemand]: 489/503 looper letters, 851 selfloop transitions, 233 changer transitions 0/1086 dead transitions. [2023-08-27 08:09:15,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1086 transitions, 21226 flow [2023-08-27 08:09:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:09:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:09:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2334 transitions. [2023-08-27 08:09:15,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30934393638170976 [2023-08-27 08:09:15,353 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2334 transitions. [2023-08-27 08:09:15,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2334 transitions. [2023-08-27 08:09:15,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:09:15,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2334 transitions. [2023-08-27 08:09:15,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 155.6) internal successors, (2334), 15 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:15,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 503.0) internal successors, (8048), 16 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:15,360 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 503.0) internal successors, (8048), 16 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:15,360 INFO L175 Difference]: Start difference. First operand has 264 places, 657 transitions, 11919 flow. Second operand 15 states and 2334 transitions. [2023-08-27 08:09:15,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1086 transitions, 21226 flow [2023-08-27 08:09:18,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1086 transitions, 20906 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 08:09:18,688 INFO L231 Difference]: Finished difference. Result has 279 places, 756 transitions, 14819 flow [2023-08-27 08:09:18,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=11758, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14819, PETRI_PLACES=279, PETRI_TRANSITIONS=756} [2023-08-27 08:09:18,689 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 227 predicate places. [2023-08-27 08:09:18,689 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 756 transitions, 14819 flow [2023-08-27 08:09:18,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.625) internal successors, (3543), 24 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:18,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:09:18,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:09:18,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 08:09:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:18,898 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:09:18,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:09:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2136156096, now seen corresponding path program 1 times [2023-08-27 08:09:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:09:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521334239] [2023-08-27 08:09:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:09:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:19,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:09:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521334239] [2023-08-27 08:09:19,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521334239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:09:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789566877] [2023-08-27 08:09:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:19,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:09:19,011 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) [2023-08-27 08:09:19,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 08:09:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:19,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:09:19,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:09:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:19,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:09:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:19,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789566877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:09:19,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:09:19,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 08:09:19,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721143742] [2023-08-27 08:09:19,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:09:19,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:09:19,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:09:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:09:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:09:19,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 503 [2023-08-27 08:09:19,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 756 transitions, 14819 flow. Second operand has 12 states, 12 states have (on average 186.16666666666666) internal successors, (2234), 12 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:19,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:09:19,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 503 [2023-08-27 08:09:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:09:24,234 INFO L124 PetriNetUnfolderBase]: 12390/19899 cut-off events. [2023-08-27 08:09:24,234 INFO L125 PetriNetUnfolderBase]: For 387277/387543 co-relation queries the response was YES. [2023-08-27 08:09:24,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153094 conditions, 19899 events. 12390/19899 cut-off events. For 387277/387543 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 144563 event pairs, 4759 based on Foata normal form. 788/18241 useless extension candidates. Maximal degree in co-relation 152990. Up to 12152 conditions per place. [2023-08-27 08:09:24,596 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 777 selfloop transitions, 96 changer transitions 0/875 dead transitions. [2023-08-27 08:09:24,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 875 transitions, 18367 flow [2023-08-27 08:09:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:09:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:09:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1174 transitions. [2023-08-27 08:09:24,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3889993373094765 [2023-08-27 08:09:24,598 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1174 transitions. [2023-08-27 08:09:24,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1174 transitions. [2023-08-27 08:09:24,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:09:24,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1174 transitions. [2023-08-27 08:09:24,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.66666666666666) internal successors, (1174), 6 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:24,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:24,601 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:24,601 INFO L175 Difference]: Start difference. First operand has 279 places, 756 transitions, 14819 flow. Second operand 6 states and 1174 transitions. [2023-08-27 08:09:24,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 875 transitions, 18367 flow [2023-08-27 08:09:27,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 875 transitions, 18169 flow, removed 78 selfloop flow, removed 5 redundant places. [2023-08-27 08:09:27,816 INFO L231 Difference]: Finished difference. Result has 280 places, 753 transitions, 14928 flow [2023-08-27 08:09:27,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=14200, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14928, PETRI_PLACES=280, PETRI_TRANSITIONS=753} [2023-08-27 08:09:27,817 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 228 predicate places. [2023-08-27 08:09:27,817 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 753 transitions, 14928 flow [2023-08-27 08:09:27,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 186.16666666666666) internal successors, (2234), 12 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:27,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:09:27,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:09:27,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 08:09:28,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:28,018 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:09:28,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:09:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash -880249937, now seen corresponding path program 5 times [2023-08-27 08:09:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:09:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142000616] [2023-08-27 08:09:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:09:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:09:28,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:09:28,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142000616] [2023-08-27 08:09:28,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142000616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:09:28,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234987803] [2023-08-27 08:09:28,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:09:28,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:28,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:09:28,657 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) [2023-08-27 08:09:28,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 08:09:28,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:09:28,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:09:28,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 08:09:28,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:09:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:09:29,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:09:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:09:29,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:09:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:09:29,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:09:29,400 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1654 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1654) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 08:09:29,413 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1654 (Array Int Int)) (v_ArrVal_1653 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1653) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1654) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 08:09:29,431 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:09:29,431 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 88 treesize of output 80 [2023-08-27 08:09:29,438 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 68 treesize of output 56 [2023-08-27 08:09:29,445 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 30 treesize of output 24 [2023-08-27 08:09:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:09:29,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234987803] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:09:29,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:09:29,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 08:09:29,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771179314] [2023-08-27 08:09:29,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:09:29,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 08:09:29,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:09:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 08:09:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=477, Unknown=3, NotChecked=90, Total=650 [2023-08-27 08:09:29,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 503 [2023-08-27 08:09:29,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 753 transitions, 14928 flow. Second operand has 26 states, 26 states have (on average 152.5) internal successors, (3965), 26 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:29,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:09:29,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 503 [2023-08-27 08:09:29,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:09:36,557 INFO L124 PetriNetUnfolderBase]: 12900/20551 cut-off events. [2023-08-27 08:09:36,557 INFO L125 PetriNetUnfolderBase]: For 420833/421091 co-relation queries the response was YES. [2023-08-27 08:09:36,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161807 conditions, 20551 events. 12900/20551 cut-off events. For 420833/421091 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 148627 event pairs, 3065 based on Foata normal form. 324/18471 useless extension candidates. Maximal degree in co-relation 161701. Up to 9917 conditions per place. [2023-08-27 08:09:36,788 INFO L140 encePairwiseOnDemand]: 486/503 looper letters, 746 selfloop transitions, 199 changer transitions 0/947 dead transitions. [2023-08-27 08:09:36,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 947 transitions, 18934 flow [2023-08-27 08:09:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:09:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:09:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3033 transitions. [2023-08-27 08:09:36,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3173590038715078 [2023-08-27 08:09:36,791 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3033 transitions. [2023-08-27 08:09:36,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3033 transitions. [2023-08-27 08:09:36,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:09:36,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3033 transitions. [2023-08-27 08:09:36,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 159.6315789473684) internal successors, (3033), 19 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:36,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 503.0) internal successors, (10060), 20 states have internal predecessors, (10060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:36,798 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 503.0) internal successors, (10060), 20 states have internal predecessors, (10060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:36,798 INFO L175 Difference]: Start difference. First operand has 280 places, 753 transitions, 14928 flow. Second operand 19 states and 3033 transitions. [2023-08-27 08:09:36,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 947 transitions, 18934 flow [2023-08-27 08:09:40,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 947 transitions, 18788 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-27 08:09:40,554 INFO L231 Difference]: Finished difference. Result has 299 places, 790 transitions, 16164 flow [2023-08-27 08:09:40,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=14661, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=16164, PETRI_PLACES=299, PETRI_TRANSITIONS=790} [2023-08-27 08:09:40,555 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 247 predicate places. [2023-08-27 08:09:40,555 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 790 transitions, 16164 flow [2023-08-27 08:09:40,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 152.5) internal successors, (3965), 26 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:40,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:09:40,556 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:09:40,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 08:09:40,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:40,757 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:09:40,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:09:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1511118008, now seen corresponding path program 1 times [2023-08-27 08:09:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:09:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626580373] [2023-08-27 08:09:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:40,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:09:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 08:09:41,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:09:41,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626580373] [2023-08-27 08:09:41,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626580373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:09:41,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801245070] [2023-08-27 08:09:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:41,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:41,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:09:41,370 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) [2023-08-27 08:09:41,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 08:09:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:41,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 08:09:41,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:09:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:09:41,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:09:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:09:41,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:09:41,780 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1715 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1715) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 08:09:41,795 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:09:41,795 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 46 treesize of output 38 [2023-08-27 08:09:41,801 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 11 treesize of output 5 [2023-08-27 08:09:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-08-27 08:09:41,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801245070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:09:41,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:09:41,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-08-27 08:09:41,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53241054] [2023-08-27 08:09:41,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:09:41,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 08:09:41,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:09:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 08:09:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=445, Unknown=1, NotChecked=42, Total=552 [2023-08-27 08:09:41,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 503 [2023-08-27 08:09:41,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 790 transitions, 16164 flow. Second operand has 24 states, 24 states have (on average 144.83333333333334) internal successors, (3476), 24 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:41,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:09:41,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 503 [2023-08-27 08:09:41,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:09:48,344 INFO L124 PetriNetUnfolderBase]: 12710/20275 cut-off events. [2023-08-27 08:09:48,344 INFO L125 PetriNetUnfolderBase]: For 437490/437767 co-relation queries the response was YES. [2023-08-27 08:09:48,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164000 conditions, 20275 events. 12710/20275 cut-off events. For 437490/437767 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 146386 event pairs, 2179 based on Foata normal form. 298/18215 useless extension candidates. Maximal degree in co-relation 163888. Up to 9695 conditions per place. [2023-08-27 08:09:48,692 INFO L140 encePairwiseOnDemand]: 488/503 looper letters, 620 selfloop transitions, 417 changer transitions 0/1039 dead transitions. [2023-08-27 08:09:48,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1039 transitions, 21680 flow [2023-08-27 08:09:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 08:09:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 08:09:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3337 transitions. [2023-08-27 08:09:48,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3015543105006326 [2023-08-27 08:09:48,695 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3337 transitions. [2023-08-27 08:09:48,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3337 transitions. [2023-08-27 08:09:48,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:09:48,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3337 transitions. [2023-08-27 08:09:48,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 151.6818181818182) internal successors, (3337), 22 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:48,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 503.0) internal successors, (11569), 23 states have internal predecessors, (11569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:48,705 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 503.0) internal successors, (11569), 23 states have internal predecessors, (11569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:48,705 INFO L175 Difference]: Start difference. First operand has 299 places, 790 transitions, 16164 flow. Second operand 22 states and 3337 transitions. [2023-08-27 08:09:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1039 transitions, 21680 flow [2023-08-27 08:09:54,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1039 transitions, 21348 flow, removed 79 selfloop flow, removed 8 redundant places. [2023-08-27 08:09:54,213 INFO L231 Difference]: Finished difference. Result has 315 places, 830 transitions, 18034 flow [2023-08-27 08:09:54,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=15774, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18034, PETRI_PLACES=315, PETRI_TRANSITIONS=830} [2023-08-27 08:09:54,214 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 263 predicate places. [2023-08-27 08:09:54,214 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 830 transitions, 18034 flow [2023-08-27 08:09:54,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 144.83333333333334) internal successors, (3476), 24 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:54,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:09:54,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:09:54,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 08:09:54,419 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,SelfDestructingSolverStorable36 [2023-08-27 08:09:54,420 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:09:54,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:09:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1244944173, now seen corresponding path program 1 times [2023-08-27 08:09:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:09:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384385508] [2023-08-27 08:09:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:09:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:55,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:09:55,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384385508] [2023-08-27 08:09:55,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384385508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:09:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488128524] [2023-08-27 08:09:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:09:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:09:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:09:55,126 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) [2023-08-27 08:09:55,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 08:09:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:09:55,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 08:09:55,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:09:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:55,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:09:55,622 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:09:55,623 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 23 treesize of output 10 [2023-08-27 08:09:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:09:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488128524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:09:55,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:09:55,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2023-08-27 08:09:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459644716] [2023-08-27 08:09:55,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:09:55,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:09:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:09:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:09:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-08-27 08:09:55,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 503 [2023-08-27 08:09:55,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 830 transitions, 18034 flow. Second operand has 22 states, 22 states have (on average 151.1818181818182) internal successors, (3326), 22 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:09:55,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:09:55,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 503 [2023-08-27 08:09:55,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:10:03,789 INFO L124 PetriNetUnfolderBase]: 15706/24470 cut-off events. [2023-08-27 08:10:03,790 INFO L125 PetriNetUnfolderBase]: For 506539/506799 co-relation queries the response was YES. [2023-08-27 08:10:04,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187407 conditions, 24470 events. 15706/24470 cut-off events. For 506539/506799 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 174877 event pairs, 2826 based on Foata normal form. 248/20331 useless extension candidates. Maximal degree in co-relation 187292. Up to 13322 conditions per place. [2023-08-27 08:10:04,259 INFO L140 encePairwiseOnDemand]: 490/503 looper letters, 852 selfloop transitions, 223 changer transitions 2/1079 dead transitions. [2023-08-27 08:10:04,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1079 transitions, 23339 flow [2023-08-27 08:10:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:10:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:10:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2395 transitions. [2023-08-27 08:10:04,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.317428760768721 [2023-08-27 08:10:04,262 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2395 transitions. [2023-08-27 08:10:04,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2395 transitions. [2023-08-27 08:10:04,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:10:04,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2395 transitions. [2023-08-27 08:10:04,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 159.66666666666666) internal successors, (2395), 15 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:04,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 503.0) internal successors, (8048), 16 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:04,271 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 503.0) internal successors, (8048), 16 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:04,271 INFO L175 Difference]: Start difference. First operand has 315 places, 830 transitions, 18034 flow. Second operand 15 states and 2395 transitions. [2023-08-27 08:10:04,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1079 transitions, 23339 flow [2023-08-27 08:10:08,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1079 transitions, 22921 flow, removed 87 selfloop flow, removed 7 redundant places. [2023-08-27 08:10:08,512 INFO L231 Difference]: Finished difference. Result has 325 places, 866 transitions, 18442 flow [2023-08-27 08:10:08,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=17616, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=18442, PETRI_PLACES=325, PETRI_TRANSITIONS=866} [2023-08-27 08:10:08,513 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 273 predicate places. [2023-08-27 08:10:08,513 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 866 transitions, 18442 flow [2023-08-27 08:10:08,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 151.1818181818182) internal successors, (3326), 22 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:08,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:10:08,513 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:10:08,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 08:10:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 08:10:08,714 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:10:08,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:10:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1599839030, now seen corresponding path program 2 times [2023-08-27 08:10:08,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:10:08,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470393972] [2023-08-27 08:10:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:10:08,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:10:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:10:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:10:10,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:10:10,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470393972] [2023-08-27 08:10:10,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470393972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:10:10,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655821882] [2023-08-27 08:10:10,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:10:10,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:10:10,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:10:10,069 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) [2023-08-27 08:10:10,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 08:10:10,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:10:10,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:10:10,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:10:10,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:10:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:10:10,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:10:10,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655821882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:10:10,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:10:10,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2023-08-27 08:10:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979040077] [2023-08-27 08:10:10,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:10:10,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:10:10,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:10:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:10:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:10:10,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 08:10:10,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 866 transitions, 18442 flow. Second operand has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:10,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:10:10,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 08:10:10,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:10:17,422 INFO L124 PetriNetUnfolderBase]: 15465/24207 cut-off events. [2023-08-27 08:10:17,423 INFO L125 PetriNetUnfolderBase]: For 520508/520768 co-relation queries the response was YES. [2023-08-27 08:10:17,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199070 conditions, 24207 events. 15465/24207 cut-off events. For 520508/520768 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 172753 event pairs, 4648 based on Foata normal form. 268/20306 useless extension candidates. Maximal degree in co-relation 198952. Up to 19395 conditions per place. [2023-08-27 08:10:18,012 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 833 selfloop transitions, 119 changer transitions 0/954 dead transitions. [2023-08-27 08:10:18,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 954 transitions, 21275 flow [2023-08-27 08:10:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:10:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:10:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2023-08-27 08:10:18,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984095427435388 [2023-08-27 08:10:18,014 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2023-08-27 08:10:18,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2023-08-27 08:10:18,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:10:18,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2023-08-27 08:10:18,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:18,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:18,017 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:18,018 INFO L175 Difference]: Start difference. First operand has 325 places, 866 transitions, 18442 flow. Second operand 5 states and 1002 transitions. [2023-08-27 08:10:18,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 954 transitions, 21275 flow [2023-08-27 08:10:22,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 954 transitions, 20572 flow, removed 102 selfloop flow, removed 7 redundant places. [2023-08-27 08:10:22,669 INFO L231 Difference]: Finished difference. Result has 322 places, 864 transitions, 17996 flow [2023-08-27 08:10:22,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=17758, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=17996, PETRI_PLACES=322, PETRI_TRANSITIONS=864} [2023-08-27 08:10:22,670 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 270 predicate places. [2023-08-27 08:10:22,670 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 864 transitions, 17996 flow [2023-08-27 08:10:22,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:22,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:10:22,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:10:22,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 08:10:22,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 08:10:22,872 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:10:22,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:10:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1847593413, now seen corresponding path program 4 times [2023-08-27 08:10:22,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:10:22,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312088995] [2023-08-27 08:10:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:10:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:10:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:10:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:10:23,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:10:23,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312088995] [2023-08-27 08:10:23,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312088995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:10:23,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118013953] [2023-08-27 08:10:23,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:10:23,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:10:23,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:10:23,891 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) [2023-08-27 08:10:23,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 08:10:24,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:10:24,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:10:24,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:10:24,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:10:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:10:24,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:10:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:10:24,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:10:24,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:10:24,475 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 48 treesize of output 40 [2023-08-27 08:10:24,488 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 12 treesize of output 6 [2023-08-27 08:10:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:10:24,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118013953] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:10:24,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:10:24,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 7] total 22 [2023-08-27 08:10:24,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606483839] [2023-08-27 08:10:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:10:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:10:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:10:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:10:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=483, Unknown=5, NotChecked=0, Total=552 [2023-08-27 08:10:24,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 08:10:24,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 864 transitions, 17996 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:24,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:10:24,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 08:10:24,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:10:31,431 INFO L124 PetriNetUnfolderBase]: 15456/24198 cut-off events. [2023-08-27 08:10:31,432 INFO L125 PetriNetUnfolderBase]: For 473186/473446 co-relation queries the response was YES. [2023-08-27 08:10:32,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193743 conditions, 24198 events. 15456/24198 cut-off events. For 473186/473446 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 173213 event pairs, 2810 based on Foata normal form. 257/20654 useless extension candidates. Maximal degree in co-relation 193627. Up to 13080 conditions per place. [2023-08-27 08:10:32,200 INFO L140 encePairwiseOnDemand]: 491/503 looper letters, 582 selfloop transitions, 342 changer transitions 1/927 dead transitions. [2023-08-27 08:10:32,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 927 transitions, 20561 flow [2023-08-27 08:10:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:10:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:10:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1313 transitions. [2023-08-27 08:10:32,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729054245952854 [2023-08-27 08:10:32,202 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1313 transitions. [2023-08-27 08:10:32,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1313 transitions. [2023-08-27 08:10:32,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:10:32,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1313 transitions. [2023-08-27 08:10:32,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:32,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:32,205 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:32,205 INFO L175 Difference]: Start difference. First operand has 322 places, 864 transitions, 17996 flow. Second operand 7 states and 1313 transitions. [2023-08-27 08:10:32,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 927 transitions, 20561 flow [2023-08-27 08:10:36,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 927 transitions, 20281 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-27 08:10:36,599 INFO L231 Difference]: Finished difference. Result has 323 places, 863 transitions, 18374 flow [2023-08-27 08:10:36,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=17690, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18374, PETRI_PLACES=323, PETRI_TRANSITIONS=863} [2023-08-27 08:10:36,600 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 271 predicate places. [2023-08-27 08:10:36,600 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 863 transitions, 18374 flow [2023-08-27 08:10:36,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:36,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:10:36,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:10:36,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 08:10:36,801 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,SelfDestructingSolverStorable39 [2023-08-27 08:10:36,801 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:10:36,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:10:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1196216464, now seen corresponding path program 1 times [2023-08-27 08:10:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:10:36,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138204709] [2023-08-27 08:10:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:10:36,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:10:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:10:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:10:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:10:37,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138204709] [2023-08-27 08:10:37,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138204709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:10:37,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711702665] [2023-08-27 08:10:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:10:37,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:10:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:10:37,345 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) [2023-08-27 08:10:37,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 08:10:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:10:37,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 08:10:37,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:10:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:10:37,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:10:37,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:10:37,962 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 28 treesize of output 20 [2023-08-27 08:10:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:10:38,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711702665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:10:38,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:10:38,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-27 08:10:38,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137232036] [2023-08-27 08:10:38,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:10:38,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:10:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:10:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:10:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-08-27 08:10:38,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 503 [2023-08-27 08:10:38,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 863 transitions, 18374 flow. Second operand has 21 states, 21 states have (on average 155.1904761904762) internal successors, (3259), 21 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:38,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:10:38,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 503 [2023-08-27 08:10:38,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:10:47,169 INFO L124 PetriNetUnfolderBase]: 18201/27801 cut-off events. [2023-08-27 08:10:47,169 INFO L125 PetriNetUnfolderBase]: For 535315/535575 co-relation queries the response was YES. [2023-08-27 08:10:47,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220616 conditions, 27801 events. 18201/27801 cut-off events. For 535315/535575 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 195146 event pairs, 2274 based on Foata normal form. 340/23198 useless extension candidates. Maximal degree in co-relation 220501. Up to 15578 conditions per place. [2023-08-27 08:10:47,853 INFO L140 encePairwiseOnDemand]: 489/503 looper letters, 849 selfloop transitions, 309 changer transitions 1/1161 dead transitions. [2023-08-27 08:10:47,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1161 transitions, 25105 flow [2023-08-27 08:10:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:10:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:10:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2622 transitions. [2023-08-27 08:10:47,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3257952286282306 [2023-08-27 08:10:47,856 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2622 transitions. [2023-08-27 08:10:47,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2622 transitions. [2023-08-27 08:10:47,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:10:47,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2622 transitions. [2023-08-27 08:10:47,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 163.875) internal successors, (2622), 16 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:47,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:47,863 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:47,863 INFO L175 Difference]: Start difference. First operand has 323 places, 863 transitions, 18374 flow. Second operand 16 states and 2622 transitions. [2023-08-27 08:10:47,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1161 transitions, 25105 flow [2023-08-27 08:10:52,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1161 transitions, 24872 flow, removed 82 selfloop flow, removed 2 redundant places. [2023-08-27 08:10:52,223 INFO L231 Difference]: Finished difference. Result has 342 places, 877 transitions, 19155 flow [2023-08-27 08:10:52,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=18137, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19155, PETRI_PLACES=342, PETRI_TRANSITIONS=877} [2023-08-27 08:10:52,224 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 290 predicate places. [2023-08-27 08:10:52,225 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 877 transitions, 19155 flow [2023-08-27 08:10:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.1904761904762) internal successors, (3259), 21 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:52,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:10:52,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:10:52,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 08:10:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:10:52,426 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:10:52,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:10:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash 138633187, now seen corresponding path program 1 times [2023-08-27 08:10:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:10:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139927310] [2023-08-27 08:10:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:10:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:10:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:10:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:10:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:10:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139927310] [2023-08-27 08:10:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139927310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:10:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326013593] [2023-08-27 08:10:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:10:53,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:10:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:10:53,025 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) [2023-08-27 08:10:53,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 08:10:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:10:53,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 08:10:53,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:10:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:10:53,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:10:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:10:53,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:10:53,754 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1993 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1993) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2023-08-27 08:10:53,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:10:53,773 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 45 treesize of output 37 [2023-08-27 08:10:53,780 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 11 treesize of output 5 [2023-08-27 08:10:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:10:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326013593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:10:54,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:10:54,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-27 08:10:54,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78839838] [2023-08-27 08:10:54,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:10:54,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:10:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:10:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:10:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=316, Unknown=1, NotChecked=36, Total=420 [2023-08-27 08:10:54,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 503 [2023-08-27 08:10:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 877 transitions, 19155 flow. Second operand has 21 states, 21 states have (on average 155.14285714285714) internal successors, (3258), 21 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:10:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:10:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 503 [2023-08-27 08:10:54,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:11:04,831 INFO L124 PetriNetUnfolderBase]: 20773/31676 cut-off events. [2023-08-27 08:11:04,831 INFO L125 PetriNetUnfolderBase]: For 717619/717957 co-relation queries the response was YES. [2023-08-27 08:11:05,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274330 conditions, 31676 events. 20773/31676 cut-off events. For 717619/717957 co-relation queries the response was YES. Maximal size of possible extension queue 1615. Compared 226585 event pairs, 4191 based on Foata normal form. 372/27311 useless extension candidates. Maximal degree in co-relation 274208. Up to 17355 conditions per place. [2023-08-27 08:11:05,733 INFO L140 encePairwiseOnDemand]: 482/503 looper letters, 933 selfloop transitions, 305 changer transitions 0/1240 dead transitions. [2023-08-27 08:11:05,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1240 transitions, 28255 flow [2023-08-27 08:11:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:11:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:11:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2610 transitions. [2023-08-27 08:11:05,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32430417495029823 [2023-08-27 08:11:05,736 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2610 transitions. [2023-08-27 08:11:05,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2610 transitions. [2023-08-27 08:11:05,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:11:05,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2610 transitions. [2023-08-27 08:11:05,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 163.125) internal successors, (2610), 16 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:05,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:05,746 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:05,746 INFO L175 Difference]: Start difference. First operand has 342 places, 877 transitions, 19155 flow. Second operand 16 states and 2610 transitions. [2023-08-27 08:11:05,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1240 transitions, 28255 flow [2023-08-27 08:11:12,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1240 transitions, 27847 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-27 08:11:12,634 INFO L231 Difference]: Finished difference. Result has 354 places, 955 transitions, 21238 flow [2023-08-27 08:11:12,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=18794, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=21238, PETRI_PLACES=354, PETRI_TRANSITIONS=955} [2023-08-27 08:11:12,635 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 302 predicate places. [2023-08-27 08:11:12,635 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 955 transitions, 21238 flow [2023-08-27 08:11:12,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.14285714285714) internal successors, (3258), 21 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:12,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:11:12,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:11:12,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 08:11:12,836 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,SelfDestructingSolverStorable41 [2023-08-27 08:11:12,836 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:11:12,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:11:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash 870796046, now seen corresponding path program 2 times [2023-08-27 08:11:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:11:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738012398] [2023-08-27 08:11:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:11:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:11:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:11:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:11:12,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:11:12,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738012398] [2023-08-27 08:11:12,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738012398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:11:12,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:11:12,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 08:11:12,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231161643] [2023-08-27 08:11:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:11:12,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:11:12,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:11:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:11:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:11:12,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 503 [2023-08-27 08:11:12,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 955 transitions, 21238 flow. Second operand has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:12,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:11:12,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 503 [2023-08-27 08:11:12,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:11:24,384 INFO L124 PetriNetUnfolderBase]: 22938/35152 cut-off events. [2023-08-27 08:11:24,384 INFO L125 PetriNetUnfolderBase]: For 935104/935442 co-relation queries the response was YES. [2023-08-27 08:11:25,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326230 conditions, 35152 events. 22938/35152 cut-off events. For 935104/935442 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 256739 event pairs, 4544 based on Foata normal form. 1779/31842 useless extension candidates. Maximal degree in co-relation 326105. Up to 19700 conditions per place. [2023-08-27 08:11:25,463 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 1115 selfloop transitions, 158 changer transitions 0/1275 dead transitions. [2023-08-27 08:11:25,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1275 transitions, 30594 flow [2023-08-27 08:11:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:11:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:11:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 914 transitions. [2023-08-27 08:11:25,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542743538767396 [2023-08-27 08:11:25,466 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 914 transitions. [2023-08-27 08:11:25,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 914 transitions. [2023-08-27 08:11:25,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:11:25,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 914 transitions. [2023-08-27 08:11:25,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:25,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:25,469 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:25,469 INFO L175 Difference]: Start difference. First operand has 354 places, 955 transitions, 21238 flow. Second operand 4 states and 914 transitions. [2023-08-27 08:11:25,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1275 transitions, 30594 flow [2023-08-27 08:11:33,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1275 transitions, 29798 flow, removed 139 selfloop flow, removed 13 redundant places. [2023-08-27 08:11:33,902 INFO L231 Difference]: Finished difference. Result has 342 places, 940 transitions, 21286 flow [2023-08-27 08:11:33,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=19846, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=21286, PETRI_PLACES=342, PETRI_TRANSITIONS=940} [2023-08-27 08:11:33,903 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 290 predicate places. [2023-08-27 08:11:33,903 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 940 transitions, 21286 flow [2023-08-27 08:11:33,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:33,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:11:33,903 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:11:33,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-27 08:11:33,903 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:11:33,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:11:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2080858173, now seen corresponding path program 2 times [2023-08-27 08:11:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:11:33,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238666739] [2023-08-27 08:11:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:11:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:11:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:11:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:11:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:11:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238666739] [2023-08-27 08:11:34,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238666739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:11:34,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354810331] [2023-08-27 08:11:34,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:11:34,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:11:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:11:34,383 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) [2023-08-27 08:11:34,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 08:11:34,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:11:34,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:11:34,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 08:11:34,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:11:34,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:11:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:11:34,627 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 08:11:34,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 08:11:34,698 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:11:34,752 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-27 08:11:34,815 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:11:34,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 08:11:34,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:11:34,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:11:34,912 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:11:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:11:34,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:11:35,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:11:35,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:11:35,340 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:11:35,343 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:11:35,343 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 19 treesize of output 12 [2023-08-27 08:11:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:11:35,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:11:36,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:11:36,250 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 48 [2023-08-27 08:11:36,264 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:11:36,265 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 683 treesize of output 651 [2023-08-27 08:11:36,275 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 73 treesize of output 61 [2023-08-27 08:11:36,283 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 61 treesize of output 55 [2023-08-27 08:11:36,292 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 [2023-08-27 08:11:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:11:36,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354810331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:11:36,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:11:36,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-27 08:11:36,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598329958] [2023-08-27 08:11:36,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:11:36,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 08:11:36,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:11:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 08:11:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=931, Unknown=5, NotChecked=0, Total=1056 [2023-08-27 08:11:36,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 503 [2023-08-27 08:11:36,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 940 transitions, 21286 flow. Second operand has 33 states, 33 states have (on average 147.33333333333334) internal successors, (4862), 33 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:11:36,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:11:36,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 503 [2023-08-27 08:11:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:11:40,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:11:42,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:12:15,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:12:37,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:12:40,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:12:55,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:13:11,978 INFO L124 PetriNetUnfolderBase]: 78560/115764 cut-off events. [2023-08-27 08:13:11,978 INFO L125 PetriNetUnfolderBase]: For 3072665/3073077 co-relation queries the response was YES. [2023-08-27 08:13:14,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085556 conditions, 115764 events. 78560/115764 cut-off events. For 3072665/3073077 co-relation queries the response was YES. Maximal size of possible extension queue 5302. Compared 909569 event pairs, 8817 based on Foata normal form. 1761/100145 useless extension candidates. Maximal degree in co-relation 1085434. Up to 64030 conditions per place. [2023-08-27 08:13:15,277 INFO L140 encePairwiseOnDemand]: 487/503 looper letters, 2799 selfloop transitions, 1357 changer transitions 31/4189 dead transitions. [2023-08-27 08:13:15,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 4189 transitions, 83907 flow [2023-08-27 08:13:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-08-27 08:13:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2023-08-27 08:13:15,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 16285 transitions. [2023-08-27 08:13:15,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3113052454503747 [2023-08-27 08:13:15,287 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 16285 transitions. [2023-08-27 08:13:15,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 16285 transitions. [2023-08-27 08:13:15,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:13:15,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 16285 transitions. [2023-08-27 08:13:15,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 156.58653846153845) internal successors, (16285), 104 states have internal predecessors, (16285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:13:15,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 503.0) internal successors, (52815), 105 states have internal predecessors, (52815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:13:15,333 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 503.0) internal successors, (52815), 105 states have internal predecessors, (52815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:13:15,333 INFO L175 Difference]: Start difference. First operand has 342 places, 940 transitions, 21286 flow. Second operand 104 states and 16285 transitions. [2023-08-27 08:13:15,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 4189 transitions, 83907 flow [2023-08-27 08:14:43,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 4189 transitions, 83637 flow, removed 120 selfloop flow, removed 1 redundant places. [2023-08-27 08:14:43,766 INFO L231 Difference]: Finished difference. Result has 518 places, 2022 transitions, 52882 flow [2023-08-27 08:14:43,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=21211, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=52882, PETRI_PLACES=518, PETRI_TRANSITIONS=2022} [2023-08-27 08:14:43,768 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 466 predicate places. [2023-08-27 08:14:43,768 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 2022 transitions, 52882 flow [2023-08-27 08:14:43,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 147.33333333333334) internal successors, (4862), 33 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:14:43,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:14:43,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:14:43,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 08:14:43,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:14:43,970 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:14:43,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:14:43,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1366992150, now seen corresponding path program 6 times [2023-08-27 08:14:43,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:14:43,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283169203] [2023-08-27 08:14:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:14:43,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:14:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:14:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:14:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:14:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283169203] [2023-08-27 08:14:44,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283169203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:14:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259792289] [2023-08-27 08:14:44,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:14:44,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:14:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:14:44,703 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) [2023-08-27 08:14:44,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 08:14:44,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 08:14:44,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:14:44,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:14:44,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:14:45,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:14:45,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:14:45,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:14:45,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:14:45,514 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:14:45,514 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 23 treesize of output 10 [2023-08-27 08:14:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:14:45,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:14:47,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:14:47,953 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 88 treesize of output 80 [2023-08-27 08:14:47,958 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 68 treesize of output 56 [2023-08-27 08:14:47,964 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 30 treesize of output 24 [2023-08-27 08:14:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:14:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259792289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:14:48,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:14:48,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 08:14:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262038827] [2023-08-27 08:14:48,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:14:48,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:14:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:14:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:14:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=875, Unknown=2, NotChecked=0, Total=992 [2023-08-27 08:14:48,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 503 [2023-08-27 08:14:48,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 2022 transitions, 52882 flow. Second operand has 32 states, 32 states have (on average 152.40625) internal successors, (4877), 32 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:14:48,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:14:48,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 503 [2023-08-27 08:14:48,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:14:53,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:14:55,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:14:58,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:15:00,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]