/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 13:47:39,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 13:47:39,225 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 13:47:39,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 13:47:39,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 13:47:39,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 13:47:39,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 13:47:39,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 13:47:39,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 13:47:39,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 13:47:39,265 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 13:47:39,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 13:47:39,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 13:47:39,266 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 13:47:39,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 13:47:39,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 13:47:39,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 13:47:39,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 13:47:39,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 13:47:39,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 13:47:39,267 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 13:47:39,268 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 13:47:39,268 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 13:47:39,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 13:47:39,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 13:47:39,269 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 13:47:39,269 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 13:47:39,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:47:39,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 13:47:39,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 13:47:39,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 13:47:39,270 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 13:47:39,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 13:47:39,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 13:47:39,271 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 13:47:39,271 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 13:47:39,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 13:47:39,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 13:47:39,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 13:47:39,632 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 13:47:39,633 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 13:47:39,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-27 13:47:40,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 13:47:41,068 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 13:47:41,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-27 13:47:41,075 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8714a1fa8/a1d3623c83434039bdc23cbed484a36e/FLAG22d66b053 [2023-08-27 13:47:41,087 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8714a1fa8/a1d3623c83434039bdc23cbed484a36e [2023-08-27 13:47:41,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 13:47:41,090 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 13:47:41,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 13:47:41,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 13:47:41,094 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 13:47:41,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d2d051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41, skipping insertion in model container [2023-08-27 13:47:41,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,125 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 13:47:41,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:47:41,268 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 13:47:41,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:47:41,302 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 13:47:41,302 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 13:47:41,308 INFO L206 MainTranslator]: Completed translation [2023-08-27 13:47:41,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41 WrapperNode [2023-08-27 13:47:41,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 13:47:41,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 13:47:41,309 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 13:47:41,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 13:47:41,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,324 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,366 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 362 [2023-08-27 13:47:41,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 13:47:41,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 13:47:41,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 13:47:41,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 13:47:41,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,395 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,395 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,428 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 13:47:41,429 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 13:47:41,429 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 13:47:41,429 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 13:47:41,430 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (1/1) ... [2023-08-27 13:47:41,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:47:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:41,462 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 13:47:41,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 13:47:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 13:47:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 13:47:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 13:47:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 13:47:41,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 13:47:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 13:47:41,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 13:47:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 13:47:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 13:47:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 13:47:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 13:47:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 13:47:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 13:47:41,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 13:47:41,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 13:47:41,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 13:47:41,508 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 13:47:41,501 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 13:47:41,644 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 13:47:41,651 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 13:47:42,091 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 13:47:42,357 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 13:47:42,357 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-27 13:47:42,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:47:42 BoogieIcfgContainer [2023-08-27 13:47:42,363 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 13:47:42,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 13:47:42,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 13:47:42,368 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 13:47:42,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:47:41" (1/3) ... [2023-08-27 13:47:42,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb8bc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:47:42, skipping insertion in model container [2023-08-27 13:47:42,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:47:41" (2/3) ... [2023-08-27 13:47:42,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb8bc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:47:42, skipping insertion in model container [2023-08-27 13:47:42,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:47:42" (3/3) ... [2023-08-27 13:47:42,371 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-08-27 13:47:42,388 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 13:47:42,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-08-27 13:47:42,389 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 13:47:42,518 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 13:47:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 305 transitions, 634 flow [2023-08-27 13:47:42,718 INFO L124 PetriNetUnfolderBase]: 22/302 cut-off events. [2023-08-27 13:47:42,719 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 13:47:42,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 302 events. 22/302 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 359 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 253. Up to 3 conditions per place. [2023-08-27 13:47:42,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 305 transitions, 634 flow [2023-08-27 13:47:42,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 291 transitions, 600 flow [2023-08-27 13:47:42,761 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 13:47:42,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 279 places, 291 transitions, 600 flow [2023-08-27 13:47:42,776 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 279 places, 291 transitions, 600 flow [2023-08-27 13:47:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 291 transitions, 600 flow [2023-08-27 13:47:42,828 INFO L124 PetriNetUnfolderBase]: 22/291 cut-off events. [2023-08-27 13:47:42,828 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 13:47:42,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 291 events. 22/291 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 359 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 253. Up to 3 conditions per place. [2023-08-27 13:47:42,836 INFO L119 LiptonReduction]: Number of co-enabled transitions 5314 [2023-08-27 13:47:54,232 INFO L134 LiptonReduction]: Checked pairs total: 15388 [2023-08-27 13:47:54,232 INFO L136 LiptonReduction]: Total number of compositions: 307 [2023-08-27 13:47:54,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 13:47:54,249 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;@fcb119e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 13:47:54,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-08-27 13:47:54,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 13:47:54,251 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 13:47:54,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 13:47:54,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:54,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 13:47:54,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:47:54,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash 45338, now seen corresponding path program 1 times [2023-08-27 13:47:54,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:54,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168587603] [2023-08-27 13:47:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:54,473 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 13:47:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168587603] [2023-08-27 13:47:54,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168587603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:47:54,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:47:54,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 13:47:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125524924] [2023-08-27 13:47:54,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:47:54,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:47:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:47:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:47:54,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 13:47:54,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 13:47:54,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:54,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 13:47:54,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:55,695 INFO L124 PetriNetUnfolderBase]: 6389/9066 cut-off events. [2023-08-27 13:47:55,695 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2023-08-27 13:47:55,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18492 conditions, 9066 events. 6389/9066 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 47351 event pairs, 5657 based on Foata normal form. 0/3750 useless extension candidates. Maximal degree in co-relation 17050. Up to 9062 conditions per place. [2023-08-27 13:47:55,751 INFO L140 encePairwiseOnDemand]: 590/612 looper letters, 55 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2023-08-27 13:47:55,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 266 flow [2023-08-27 13:47:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:47:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:47:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-08-27 13:47:55,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226579520697168 [2023-08-27 13:47:55,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-08-27 13:47:55,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-08-27 13:47:55,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:55,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-08-27 13:47:55,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 13:47:55,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:47:55,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:47:55,783 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 148 flow. Second operand 3 states and 776 transitions. [2023-08-27 13:47:55,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 266 flow [2023-08-27 13:47:55,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 254 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 13:47:55,813 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 182 flow [2023-08-27 13:47:55,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-08-27 13:47:55,817 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-27 13:47:55,818 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 182 flow [2023-08-27 13:47:55,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 13:47:55,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:55,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 13:47:55,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 13:47:55,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:47:55,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1406889, now seen corresponding path program 1 times [2023-08-27 13:47:55,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:55,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820598379] [2023-08-27 13:47:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:55,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:55,919 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 13:47:55,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:55,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820598379] [2023-08-27 13:47:55,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820598379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:47:55,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:47:55,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:47:55,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644510583] [2023-08-27 13:47:55,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:47:55,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:47:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:47:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:47:55,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 13:47:55,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 13:47:55,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:55,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 13:47:55,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:56,831 INFO L124 PetriNetUnfolderBase]: 6389/9063 cut-off events. [2023-08-27 13:47:56,832 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-27 13:47:56,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18275 conditions, 9063 events. 6389/9063 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 47349 event pairs, 5657 based on Foata normal form. 0/3754 useless extension candidates. Maximal degree in co-relation 18216. Up to 9050 conditions per place. [2023-08-27 13:47:56,884 INFO L140 encePairwiseOnDemand]: 607/612 looper letters, 56 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-27 13:47:56,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 288 flow [2023-08-27 13:47:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:47:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:47:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-08-27 13:47:56,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41122004357298475 [2023-08-27 13:47:56,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-08-27 13:47:56,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-08-27 13:47:56,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:56,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-08-27 13:47:56,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states 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 13:47:56,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:47:56,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:47:56,897 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 182 flow. Second operand 3 states and 755 transitions. [2023-08-27 13:47:56,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 288 flow [2023-08-27 13:47:56,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:47:56,900 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 162 flow [2023-08-27 13:47:56,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-27 13:47:56,901 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -12 predicate places. [2023-08-27 13:47:56,901 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 162 flow [2023-08-27 13:47:56,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 13:47:56,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:56,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 13:47:56,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 13:47:56,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:47:56,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1406890, now seen corresponding path program 1 times [2023-08-27 13:47:56,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:56,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039851756] [2023-08-27 13:47:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:57,027 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 13:47:57,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:57,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039851756] [2023-08-27 13:47:57,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039851756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128932009] [2023-08-27 13:47:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:57,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:57,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:57,031 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 13:47:57,079 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 13:47:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:57,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:47:57,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:57,213 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 13:47:57,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:57,244 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 13:47:57,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128932009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:57,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:57,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 13:47:57,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081435895] [2023-08-27 13:47:57,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:57,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 13:47:57,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:57,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 13:47:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 13:47:57,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 13:47:57,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 234.14285714285714) internal successors, (1639), 7 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states 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 13:47:57,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:57,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 13:47:57,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:58,240 INFO L124 PetriNetUnfolderBase]: 6398/9081 cut-off events. [2023-08-27 13:47:58,241 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-27 13:47:58,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18328 conditions, 9081 events. 6398/9081 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 47391 event pairs, 5657 based on Foata normal form. 0/3764 useless extension candidates. Maximal degree in co-relation 18216. Up to 9062 conditions per place. [2023-08-27 13:47:58,278 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 52 selfloop transitions, 25 changer transitions 0/77 dead transitions. [2023-08-27 13:47:58,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 394 flow [2023-08-27 13:47:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:47:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:47:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1484 transitions. [2023-08-27 13:47:58,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40413943355119825 [2023-08-27 13:47:58,283 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1484 transitions. [2023-08-27 13:47:58,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1484 transitions. [2023-08-27 13:47:58,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:58,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1484 transitions. [2023-08-27 13:47:58,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.33333333333334) internal successors, (1484), 6 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states 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 13:47:58,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states 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 13:47:58,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states 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 13:47:58,295 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 162 flow. Second operand 6 states and 1484 transitions. [2023-08-27 13:47:58,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 394 flow [2023-08-27 13:47:58,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:47:58,299 INFO L231 Difference]: Finished difference. Result has 61 places, 77 transitions, 331 flow [2023-08-27 13:47:58,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=61, PETRI_TRANSITIONS=77} [2023-08-27 13:47:58,300 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -6 predicate places. [2023-08-27 13:47:58,300 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 77 transitions, 331 flow [2023-08-27 13:47:58,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 234.14285714285714) internal successors, (1639), 7 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states 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 13:47:58,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:58,302 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 13:47:58,307 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 13:47:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:58,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:47:58,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1035641637, now seen corresponding path program 2 times [2023-08-27 13:47:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:58,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610288241] [2023-08-27 13:47:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:58,652 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 13:47:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:58,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610288241] [2023-08-27 13:47:58,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610288241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:58,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380613852] [2023-08-27 13:47:58,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:47:58,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:58,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:58,656 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 13:47:58,659 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 13:47:58,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:47:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:58,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 13:47:58,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:58,775 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 13:47:58,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:47:58,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380613852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:47:58,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:47:58,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 13:47:58,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090386087] [2023-08-27 13:47:58,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:47:58,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:47:58,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:58,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:47:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 13:47:58,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 612 [2023-08-27 13:47:58,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 77 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states 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 13:47:58,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:58,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 612 [2023-08-27 13:47:58,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:59,618 INFO L124 PetriNetUnfolderBase]: 6398/9080 cut-off events. [2023-08-27 13:47:59,619 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-08-27 13:47:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18375 conditions, 9080 events. 6398/9080 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 47401 event pairs, 5657 based on Foata normal form. 1/3771 useless extension candidates. Maximal degree in co-relation 18287. Up to 9075 conditions per place. [2023-08-27 13:47:59,668 INFO L140 encePairwiseOnDemand]: 609/612 looper letters, 70 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-08-27 13:47:59,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 473 flow [2023-08-27 13:47:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:47:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:47:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-27 13:47:59,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144880174291939 [2023-08-27 13:47:59,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-27 13:47:59,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-27 13:47:59,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:59,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-27 13:47:59,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 13:47:59,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:47:59,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:47:59,678 INFO L175 Difference]: Start difference. First operand has 61 places, 77 transitions, 331 flow. Second operand 3 states and 761 transitions. [2023-08-27 13:47:59,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 473 flow [2023-08-27 13:47:59,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 436 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-27 13:47:59,681 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 296 flow [2023-08-27 13:47:59,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2023-08-27 13:47:59,682 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -6 predicate places. [2023-08-27 13:47:59,682 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 296 flow [2023-08-27 13:47:59,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states 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 13:47:59,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:59,683 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 13:47:59,692 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 13:47:59,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-27 13:47:59,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:47:59,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1029509264, now seen corresponding path program 1 times [2023-08-27 13:47:59,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:59,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679222720] [2023-08-27 13:47:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:59,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:59,978 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 13:47:59,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:59,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679222720] [2023-08-27 13:47:59,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679222720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:59,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464515177] [2023-08-27 13:47:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:59,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:59,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:59,980 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 13:47:59,983 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 13:48:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:00,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 13:48:00,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:00,107 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 13:48:00,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:00,162 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 13:48:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464515177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:00,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:00,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 13:48:00,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082933077] [2023-08-27 13:48:00,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:00,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 13:48:00,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 13:48:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:48:00,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 13:48:00,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 296 flow. Second operand has 13 states, 13 states have (on average 234.15384615384616) internal successors, (3044), 13 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states 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 13:48:00,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:00,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 13:48:00,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:01,042 INFO L124 PetriNetUnfolderBase]: 6416/9116 cut-off events. [2023-08-27 13:48:01,042 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-27 13:48:01,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18499 conditions, 9116 events. 6416/9116 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 47644 event pairs, 5657 based on Foata normal form. 12/3809 useless extension candidates. Maximal degree in co-relation 18396. Up to 9067 conditions per place. [2023-08-27 13:48:01,119 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 51 selfloop transitions, 61 changer transitions 0/112 dead transitions. [2023-08-27 13:48:01,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 736 flow [2023-08-27 13:48:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 13:48:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 13:48:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2920 transitions. [2023-08-27 13:48:01,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39760348583877997 [2023-08-27 13:48:01,127 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2920 transitions. [2023-08-27 13:48:01,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2920 transitions. [2023-08-27 13:48:01,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:01,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2920 transitions. [2023-08-27 13:48:01,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.33333333333334) internal successors, (2920), 12 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 13:48:01,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 612.0) internal successors, (7956), 13 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states 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 13:48:01,151 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 612.0) internal successors, (7956), 13 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states 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 13:48:01,151 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 296 flow. Second operand 12 states and 2920 transitions. [2023-08-27 13:48:01,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 736 flow [2023-08-27 13:48:01,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 712 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:48:01,156 INFO L231 Difference]: Finished difference. Result has 76 places, 112 transitions, 696 flow [2023-08-27 13:48:01,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=696, PETRI_PLACES=76, PETRI_TRANSITIONS=112} [2023-08-27 13:48:01,159 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-27 13:48:01,159 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 112 transitions, 696 flow [2023-08-27 13:48:01,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 234.15384615384616) internal successors, (3044), 13 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states 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 13:48:01,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:01,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:01,165 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 13:48:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:01,365 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:01,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1006754435, now seen corresponding path program 1 times [2023-08-27 13:48:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906065998] [2023-08-27 13:48:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:01,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:01,491 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 13:48:01,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:01,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906065998] [2023-08-27 13:48:01,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906065998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:01,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:48:01,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555104668] [2023-08-27 13:48:01,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:01,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:48:01,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:01,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:48:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 13:48:01,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 13:48:01,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 112 transitions, 696 flow. Second operand has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states 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 13:48:01,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:01,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 13:48:01,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:02,414 INFO L124 PetriNetUnfolderBase]: 6568/9385 cut-off events. [2023-08-27 13:48:02,414 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-27 13:48:02,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19318 conditions, 9385 events. 6568/9385 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 49424 event pairs, 5780 based on Foata normal form. 90/4105 useless extension candidates. Maximal degree in co-relation 19122. Up to 9115 conditions per place. [2023-08-27 13:48:02,443 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 172 selfloop transitions, 3 changer transitions 1/176 dead transitions. [2023-08-27 13:48:02,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 176 transitions, 1502 flow [2023-08-27 13:48:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 13:48:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 13:48:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 956 transitions. [2023-08-27 13:48:02,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39052287581699346 [2023-08-27 13:48:02,447 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 956 transitions. [2023-08-27 13:48:02,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 956 transitions. [2023-08-27 13:48:02,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:02,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 956 transitions. [2023-08-27 13:48:02,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 13:48:02,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 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 13:48:02,453 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 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 13:48:02,453 INFO L175 Difference]: Start difference. First operand has 76 places, 112 transitions, 696 flow. Second operand 4 states and 956 transitions. [2023-08-27 13:48:02,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 176 transitions, 1502 flow [2023-08-27 13:48:02,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 176 transitions, 1202 flow, removed 91 selfloop flow, removed 5 redundant places. [2023-08-27 13:48:02,459 INFO L231 Difference]: Finished difference. Result has 75 places, 112 transitions, 537 flow [2023-08-27 13:48:02,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=537, PETRI_PLACES=75, PETRI_TRANSITIONS=112} [2023-08-27 13:48:02,460 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-27 13:48:02,460 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 112 transitions, 537 flow [2023-08-27 13:48:02,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states 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 13:48:02,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:02,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:02,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 13:48:02,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:02,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2080759730, now seen corresponding path program 1 times [2023-08-27 13:48:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:02,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953962415] [2023-08-27 13:48:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:02,586 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 13:48:02,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:02,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953962415] [2023-08-27 13:48:02,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953962415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:02,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244203435] [2023-08-27 13:48:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:02,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:02,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:02,588 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 13:48:02,615 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 13:48:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:02,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:48:02,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:02,726 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 13:48:02,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:48:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244203435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:02,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:48:02,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 13:48:02,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509611025] [2023-08-27 13:48:02,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:02,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:48:02,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:48:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 13:48:02,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 612 [2023-08-27 13:48:02,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 112 transitions, 537 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 13:48:02,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:02,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 612 [2023-08-27 13:48:02,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:03,302 INFO L124 PetriNetUnfolderBase]: 4958/7113 cut-off events. [2023-08-27 13:48:03,303 INFO L125 PetriNetUnfolderBase]: For 635/635 co-relation queries the response was YES. [2023-08-27 13:48:03,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15215 conditions, 7113 events. 4958/7113 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 35933 event pairs, 4296 based on Foata normal form. 0/3268 useless extension candidates. Maximal degree in co-relation 15055. Up to 7113 conditions per place. [2023-08-27 13:48:03,323 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 108 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-08-27 13:48:03,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 743 flow [2023-08-27 13:48:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:48:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:48:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 814 transitions. [2023-08-27 13:48:03,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433551198257081 [2023-08-27 13:48:03,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 814 transitions. [2023-08-27 13:48:03,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 814 transitions. [2023-08-27 13:48:03,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:03,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 814 transitions. [2023-08-27 13:48:03,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states 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 13:48:03,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:03,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:03,331 INFO L175 Difference]: Start difference. First operand has 75 places, 112 transitions, 537 flow. Second operand 3 states and 814 transitions. [2023-08-27 13:48:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 743 flow [2023-08-27 13:48:03,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 737 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:03,335 INFO L231 Difference]: Finished difference. Result has 73 places, 109 transitions, 521 flow [2023-08-27 13:48:03,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=521, PETRI_PLACES=73, PETRI_TRANSITIONS=109} [2023-08-27 13:48:03,336 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2023-08-27 13:48:03,336 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 109 transitions, 521 flow [2023-08-27 13:48:03,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 13:48:03,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:03,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:03,344 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 13:48:03,541 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 13:48:03,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:03,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash -79044560, now seen corresponding path program 1 times [2023-08-27 13:48:03,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:03,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935284203] [2023-08-27 13:48:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:03,598 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 13:48:03,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:03,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935284203] [2023-08-27 13:48:03,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935284203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:03,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:03,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:48:03,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269637997] [2023-08-27 13:48:03,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:03,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:48:03,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:48:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:48:03,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 612 [2023-08-27 13:48:03,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 109 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 13:48:03,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:03,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 612 [2023-08-27 13:48:03,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:04,600 INFO L124 PetriNetUnfolderBase]: 8266/11823 cut-off events. [2023-08-27 13:48:04,600 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2023-08-27 13:48:04,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25245 conditions, 11823 events. 8266/11823 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 67382 event pairs, 4212 based on Foata normal form. 0/5370 useless extension candidates. Maximal degree in co-relation 25225. Up to 6980 conditions per place. [2023-08-27 13:48:04,647 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 143 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2023-08-27 13:48:04,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 145 transitions, 894 flow [2023-08-27 13:48:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:48:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:48:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-27 13:48:04,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591503267973856 [2023-08-27 13:48:04,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-27 13:48:04,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-27 13:48:04,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:04,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-27 13:48:04,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states 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 13:48:04,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:04,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:04,655 INFO L175 Difference]: Start difference. First operand has 73 places, 109 transitions, 521 flow. Second operand 3 states and 843 transitions. [2023-08-27 13:48:04,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 145 transitions, 894 flow [2023-08-27 13:48:04,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 145 transitions, 893 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:04,660 INFO L231 Difference]: Finished difference. Result has 75 places, 110 transitions, 534 flow [2023-08-27 13:48:04,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=534, PETRI_PLACES=75, PETRI_TRANSITIONS=110} [2023-08-27 13:48:04,660 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-27 13:48:04,660 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 110 transitions, 534 flow [2023-08-27 13:48:04,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 13:48:04,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:04,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 13:48:04,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:04,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash -79044865, now seen corresponding path program 1 times [2023-08-27 13:48:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:04,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498070088] [2023-08-27 13:48:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:04,739 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 13:48:04,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498070088] [2023-08-27 13:48:04,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498070088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:04,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:04,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:48:04,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516093216] [2023-08-27 13:48:04,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:04,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:48:04,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:04,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:48:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:48:04,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 612 [2023-08-27 13:48:04,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 110 transitions, 534 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 13:48:04,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:04,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 612 [2023-08-27 13:48:04,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:05,696 INFO L124 PetriNetUnfolderBase]: 8849/12568 cut-off events. [2023-08-27 13:48:05,696 INFO L125 PetriNetUnfolderBase]: For 2376/2376 co-relation queries the response was YES. [2023-08-27 13:48:05,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27968 conditions, 12568 events. 8849/12568 cut-off events. For 2376/2376 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 67487 event pairs, 2540 based on Foata normal form. 292/6181 useless extension candidates. Maximal degree in co-relation 27947. Up to 10134 conditions per place. [2023-08-27 13:48:05,749 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 131 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2023-08-27 13:48:05,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 136 transitions, 869 flow [2023-08-27 13:48:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:48:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:48:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 838 transitions. [2023-08-27 13:48:05,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564270152505447 [2023-08-27 13:48:05,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 838 transitions. [2023-08-27 13:48:05,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 838 transitions. [2023-08-27 13:48:05,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:05,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 838 transitions. [2023-08-27 13:48:05,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states 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 13:48:05,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:05,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:05,756 INFO L175 Difference]: Start difference. First operand has 75 places, 110 transitions, 534 flow. Second operand 3 states and 838 transitions. [2023-08-27 13:48:05,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 136 transitions, 869 flow [2023-08-27 13:48:05,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 136 transitions, 866 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:05,763 INFO L231 Difference]: Finished difference. Result has 77 places, 114 transitions, 571 flow [2023-08-27 13:48:05,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=571, PETRI_PLACES=77, PETRI_TRANSITIONS=114} [2023-08-27 13:48:05,764 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 10 predicate places. [2023-08-27 13:48:05,764 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 114 transitions, 571 flow [2023-08-27 13:48:05,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 13:48:05,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:05,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:05,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 13:48:05,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:05,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1414771674, now seen corresponding path program 1 times [2023-08-27 13:48:05,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:05,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456080324] [2023-08-27 13:48:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:05,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:05,873 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 13:48:05,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:05,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456080324] [2023-08-27 13:48:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456080324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:05,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 13:48:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176560316] [2023-08-27 13:48:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:48:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:48:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:48:05,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 612 [2023-08-27 13:48:05,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 114 transitions, 571 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 13:48:05,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:05,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 612 [2023-08-27 13:48:05,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:06,665 INFO L124 PetriNetUnfolderBase]: 7283/10526 cut-off events. [2023-08-27 13:48:06,665 INFO L125 PetriNetUnfolderBase]: For 1486/1486 co-relation queries the response was YES. [2023-08-27 13:48:06,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25798 conditions, 10526 events. 7283/10526 cut-off events. For 1486/1486 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 57707 event pairs, 2126 based on Foata normal form. 68/4953 useless extension candidates. Maximal degree in co-relation 25775. Up to 9678 conditions per place. [2023-08-27 13:48:06,710 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 133 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-08-27 13:48:06,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 136 transitions, 913 flow [2023-08-27 13:48:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:48:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:48:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2023-08-27 13:48:06,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504357298474945 [2023-08-27 13:48:06,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2023-08-27 13:48:06,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2023-08-27 13:48:06,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:06,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2023-08-27 13:48:06,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states 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 13:48:06,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:06,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:06,717 INFO L175 Difference]: Start difference. First operand has 77 places, 114 transitions, 571 flow. Second operand 3 states and 827 transitions. [2023-08-27 13:48:06,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 136 transitions, 913 flow [2023-08-27 13:48:06,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 136 transitions, 904 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:06,726 INFO L231 Difference]: Finished difference. Result has 79 places, 116 transitions, 589 flow [2023-08-27 13:48:06,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=589, PETRI_PLACES=79, PETRI_TRANSITIONS=116} [2023-08-27 13:48:06,726 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 12 predicate places. [2023-08-27 13:48:06,727 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 116 transitions, 589 flow [2023-08-27 13:48:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 13:48:06,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:06,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 13:48:06,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:06,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 496559535, now seen corresponding path program 1 times [2023-08-27 13:48:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:06,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113102065] [2023-08-27 13:48:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:06,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:06,786 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 13:48:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113102065] [2023-08-27 13:48:06,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113102065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:06,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:06,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 13:48:06,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754344987] [2023-08-27 13:48:06,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:48:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:48:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 13:48:06,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 13:48:06,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 116 transitions, 589 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states 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 13:48:06,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:06,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 13:48:06,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:07,806 INFO L124 PetriNetUnfolderBase]: 7775/11372 cut-off events. [2023-08-27 13:48:07,807 INFO L125 PetriNetUnfolderBase]: For 2652/2652 co-relation queries the response was YES. [2023-08-27 13:48:07,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28390 conditions, 11372 events. 7775/11372 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 63067 event pairs, 6057 based on Foata normal form. 72/5541 useless extension candidates. Maximal degree in co-relation 28365. Up to 10503 conditions per place. [2023-08-27 13:48:07,852 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 128 selfloop transitions, 13 changer transitions 0/141 dead transitions. [2023-08-27 13:48:07,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 141 transitions, 942 flow [2023-08-27 13:48:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 13:48:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 13:48:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 955 transitions. [2023-08-27 13:48:07,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901143790849673 [2023-08-27 13:48:07,855 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 955 transitions. [2023-08-27 13:48:07,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 955 transitions. [2023-08-27 13:48:07,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:07,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 955 transitions. [2023-08-27 13:48:07,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 238.75) internal successors, (955), 4 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:07,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 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 13:48:07,861 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 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 13:48:07,861 INFO L175 Difference]: Start difference. First operand has 79 places, 116 transitions, 589 flow. Second operand 4 states and 955 transitions. [2023-08-27 13:48:07,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 141 transitions, 942 flow [2023-08-27 13:48:07,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 141 transitions, 929 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:07,871 INFO L231 Difference]: Finished difference. Result has 82 places, 116 transitions, 621 flow [2023-08-27 13:48:07,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=621, PETRI_PLACES=82, PETRI_TRANSITIONS=116} [2023-08-27 13:48:07,871 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 15 predicate places. [2023-08-27 13:48:07,871 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 116 transitions, 621 flow [2023-08-27 13:48:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states 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 13:48:07,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:07,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 13:48:07,872 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:07,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash 496559420, now seen corresponding path program 1 times [2023-08-27 13:48:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:07,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774389343] [2023-08-27 13:48:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:07,945 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 13:48:07,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774389343] [2023-08-27 13:48:07,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774389343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:07,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:07,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:48:07,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977506481] [2023-08-27 13:48:07,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:07,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:48:07,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:07,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:48:07,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:48:07,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 612 [2023-08-27 13:48:07,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 116 transitions, 621 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 13:48:07,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:07,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 612 [2023-08-27 13:48:07,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:08,733 INFO L124 PetriNetUnfolderBase]: 6742/9931 cut-off events. [2023-08-27 13:48:08,733 INFO L125 PetriNetUnfolderBase]: For 1597/1597 co-relation queries the response was YES. [2023-08-27 13:48:08,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24927 conditions, 9931 events. 6742/9931 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 54588 event pairs, 2598 based on Foata normal form. 156/4976 useless extension candidates. Maximal degree in co-relation 24901. Up to 9157 conditions per place. [2023-08-27 13:48:08,776 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 125 selfloop transitions, 5 changer transitions 0/130 dead transitions. [2023-08-27 13:48:08,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 913 flow [2023-08-27 13:48:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:48:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:48:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2023-08-27 13:48:08,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466230936819172 [2023-08-27 13:48:08,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2023-08-27 13:48:08,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2023-08-27 13:48:08,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:08,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2023-08-27 13:48:08,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 13:48:08,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:08,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:08,781 INFO L175 Difference]: Start difference. First operand has 82 places, 116 transitions, 621 flow. Second operand 3 states and 820 transitions. [2023-08-27 13:48:08,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 913 flow [2023-08-27 13:48:08,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 899 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:08,790 INFO L231 Difference]: Finished difference. Result has 84 places, 120 transitions, 648 flow [2023-08-27 13:48:08,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=648, PETRI_PLACES=84, PETRI_TRANSITIONS=120} [2023-08-27 13:48:08,791 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 17 predicate places. [2023-08-27 13:48:08,791 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 120 transitions, 648 flow [2023-08-27 13:48:08,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 13:48:08,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:08,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 13:48:08,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:08,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1301076197, now seen corresponding path program 1 times [2023-08-27 13:48:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:08,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189234736] [2023-08-27 13:48:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:08,841 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 13:48:08,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:08,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189234736] [2023-08-27 13:48:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189234736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:08,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:08,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:48:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057174644] [2023-08-27 13:48:08,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:48:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:48:08,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:48:08,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 612 [2023-08-27 13:48:08,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 120 transitions, 648 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:08,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:08,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 612 [2023-08-27 13:48:08,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:09,746 INFO L124 PetriNetUnfolderBase]: 7135/10668 cut-off events. [2023-08-27 13:48:09,746 INFO L125 PetriNetUnfolderBase]: For 2702/2702 co-relation queries the response was YES. [2023-08-27 13:48:09,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30243 conditions, 10668 events. 7135/10668 cut-off events. For 2702/2702 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 61979 event pairs, 4662 based on Foata normal form. 0/5615 useless extension candidates. Maximal degree in co-relation 30215. Up to 9384 conditions per place. [2023-08-27 13:48:09,810 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 151 selfloop transitions, 3 changer transitions 0/154 dead transitions. [2023-08-27 13:48:09,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 154 transitions, 1095 flow [2023-08-27 13:48:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:48:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:48:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2023-08-27 13:48:09,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2023-08-27 13:48:09,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2023-08-27 13:48:09,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2023-08-27 13:48:09,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:09,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2023-08-27 13:48:09,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 13:48:09,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:09,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 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 13:48:09,817 INFO L175 Difference]: Start difference. First operand has 84 places, 120 transitions, 648 flow. Second operand 3 states and 834 transitions. [2023-08-27 13:48:09,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 154 transitions, 1095 flow [2023-08-27 13:48:09,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 154 transitions, 1091 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:09,826 INFO L231 Difference]: Finished difference. Result has 85 places, 119 transitions, 645 flow [2023-08-27 13:48:09,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=645, PETRI_PLACES=85, PETRI_TRANSITIONS=119} [2023-08-27 13:48:09,827 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 18 predicate places. [2023-08-27 13:48:09,827 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 119 transitions, 645 flow [2023-08-27 13:48:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:09,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:09,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 13:48:09,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:09,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1301076095, now seen corresponding path program 1 times [2023-08-27 13:48:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:09,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820110997] [2023-08-27 13:48:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:09,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:09,899 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 13:48:09,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:09,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820110997] [2023-08-27 13:48:09,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820110997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:09,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:48:09,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 13:48:09,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959432096] [2023-08-27 13:48:09,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:09,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:48:09,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:48:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 13:48:09,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 13:48:09,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 119 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 13:48:09,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:09,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 13:48:09,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:10,964 INFO L124 PetriNetUnfolderBase]: 7393/11170 cut-off events. [2023-08-27 13:48:10,964 INFO L125 PetriNetUnfolderBase]: For 3188/3188 co-relation queries the response was YES. [2023-08-27 13:48:10,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31727 conditions, 11170 events. 7393/11170 cut-off events. For 3188/3188 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 64813 event pairs, 5377 based on Foata normal form. 96/6213 useless extension candidates. Maximal degree in co-relation 31699. Up to 10656 conditions per place. [2023-08-27 13:48:11,006 INFO L140 encePairwiseOnDemand]: 601/612 looper letters, 117 selfloop transitions, 14 changer transitions 25/156 dead transitions. [2023-08-27 13:48:11,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 156 transitions, 1148 flow [2023-08-27 13:48:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:48:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:48:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1166 transitions. [2023-08-27 13:48:11,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810457516339869 [2023-08-27 13:48:11,010 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1166 transitions. [2023-08-27 13:48:11,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1166 transitions. [2023-08-27 13:48:11,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:11,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1166 transitions. [2023-08-27 13:48:11,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.2) internal successors, (1166), 5 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states 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 13:48:11,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:48:11,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:48:11,015 INFO L175 Difference]: Start difference. First operand has 85 places, 119 transitions, 645 flow. Second operand 5 states and 1166 transitions. [2023-08-27 13:48:11,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 156 transitions, 1148 flow [2023-08-27 13:48:11,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 156 transitions, 1144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:11,027 INFO L231 Difference]: Finished difference. Result has 90 places, 120 transitions, 694 flow [2023-08-27 13:48:11,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=694, PETRI_PLACES=90, PETRI_TRANSITIONS=120} [2023-08-27 13:48:11,027 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2023-08-27 13:48:11,027 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 120 transitions, 694 flow [2023-08-27 13:48:11,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 13:48:11,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:11,028 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 13:48:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 13:48:11,028 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:11,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1781421232, now seen corresponding path program 2 times [2023-08-27 13:48:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951548997] [2023-08-27 13:48:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:11,197 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 13:48:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:11,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951548997] [2023-08-27 13:48:11,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951548997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:11,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736664191] [2023-08-27 13:48:11,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:48:11,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:11,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:11,201 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 13:48:11,209 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 13:48:11,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:48:11,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:11,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 13:48:11,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:11,359 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 13:48:11,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:48:11,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736664191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:11,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:48:11,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 13:48:11,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584838530] [2023-08-27 13:48:11,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:11,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:48:11,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:11,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:48:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 13:48:11,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 13:48:11,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 120 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 13:48:11,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:11,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 13:48:11,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:12,199 INFO L124 PetriNetUnfolderBase]: 5774/8719 cut-off events. [2023-08-27 13:48:12,200 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2023-08-27 13:48:12,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25890 conditions, 8719 events. 5774/8719 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 48447 event pairs, 3996 based on Foata normal form. 2/5031 useless extension candidates. Maximal degree in co-relation 25860. Up to 8674 conditions per place. [2023-08-27 13:48:12,240 INFO L140 encePairwiseOnDemand]: 607/612 looper letters, 105 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2023-08-27 13:48:12,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 898 flow [2023-08-27 13:48:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 13:48:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 13:48:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 981 transitions. [2023-08-27 13:48:12,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007352941176471 [2023-08-27 13:48:12,243 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 981 transitions. [2023-08-27 13:48:12,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 981 transitions. [2023-08-27 13:48:12,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:12,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 981 transitions. [2023-08-27 13:48:12,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 13:48:12,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 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 13:48:12,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 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 13:48:12,248 INFO L175 Difference]: Start difference. First operand has 90 places, 120 transitions, 694 flow. Second operand 4 states and 981 transitions. [2023-08-27 13:48:12,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 898 flow [2023-08-27 13:48:12,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 856 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 13:48:12,257 INFO L231 Difference]: Finished difference. Result has 88 places, 117 transitions, 646 flow [2023-08-27 13:48:12,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=646, PETRI_PLACES=88, PETRI_TRANSITIONS=117} [2023-08-27 13:48:12,258 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 21 predicate places. [2023-08-27 13:48:12,258 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 117 transitions, 646 flow [2023-08-27 13:48:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 13:48:12,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:12,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:12,267 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 13:48:12,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 13:48:12,464 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:12,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1041331456, now seen corresponding path program 1 times [2023-08-27 13:48:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:12,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102119775] [2023-08-27 13:48:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:12,878 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 13:48:12,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102119775] [2023-08-27 13:48:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102119775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065115211] [2023-08-27 13:48:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:12,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:12,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:12,881 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 13:48:12,909 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 13:48:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:13,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 13:48:13,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:13,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:48:13,106 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 13:48:13,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:48:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065115211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:13,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:48:13,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-27 13:48:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287340989] [2023-08-27 13:48:13,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:48:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:48:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-27 13:48:13,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 612 [2023-08-27 13:48:13,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 646 flow. Second operand has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 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 13:48:13,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:13,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 612 [2023-08-27 13:48:13,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:14,101 INFO L124 PetriNetUnfolderBase]: 6710/10172 cut-off events. [2023-08-27 13:48:14,101 INFO L125 PetriNetUnfolderBase]: For 3335/3335 co-relation queries the response was YES. [2023-08-27 13:48:14,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30176 conditions, 10172 events. 6710/10172 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 60446 event pairs, 1852 based on Foata normal form. 0/5979 useless extension candidates. Maximal degree in co-relation 30146. Up to 7379 conditions per place. [2023-08-27 13:48:14,191 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 155 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-08-27 13:48:14,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1145 flow [2023-08-27 13:48:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:48:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:48:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1251 transitions. [2023-08-27 13:48:14,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2023-08-27 13:48:14,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1251 transitions. [2023-08-27 13:48:14,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1251 transitions. [2023-08-27 13:48:14,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:14,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1251 transitions. [2023-08-27 13:48:14,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.2) internal successors, (1251), 5 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 13:48:14,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:48:14,200 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:48:14,200 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 646 flow. Second operand 5 states and 1251 transitions. [2023-08-27 13:48:14,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1145 flow [2023-08-27 13:48:14,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 163 transitions, 1132 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:48:14,217 INFO L231 Difference]: Finished difference. Result has 93 places, 122 transitions, 690 flow [2023-08-27 13:48:14,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=690, PETRI_PLACES=93, PETRI_TRANSITIONS=122} [2023-08-27 13:48:14,218 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 26 predicate places. [2023-08-27 13:48:14,218 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 122 transitions, 690 flow [2023-08-27 13:48:14,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 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 13:48:14,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:14,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:14,225 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 13:48:14,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 13:48:14,424 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:14,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash 332286873, now seen corresponding path program 1 times [2023-08-27 13:48:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:14,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832382719] [2023-08-27 13:48:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:14,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:14,852 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 13:48:14,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:14,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832382719] [2023-08-27 13:48:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832382719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:14,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323624915] [2023-08-27 13:48:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:14,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:14,854 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 13:48:14,857 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 13:48:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:14,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 13:48:15,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:15,058 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 13:48:15,058 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 13:48:15,116 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 13:48:15,166 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 13:48:15,167 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 13:48:15,204 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 13:48:15,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 13:48:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:15,321 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 13:48:15,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-27 13:48:15,383 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 13:48:15,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:17,830 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:17,831 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 62 treesize of output 50 [2023-08-27 13:48:17,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1367 treesize of output 1287 [2023-08-27 13:48:17,872 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 93 treesize of output 81 [2023-08-27 13:48:17,884 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 92 treesize of output 68 [2023-08-27 13:48:17,896 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 70 treesize of output 46 [2023-08-27 13:48:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:18,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323624915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:18,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:18,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 13:48:18,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341226674] [2023-08-27 13:48:18,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:18,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 13:48:18,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 13:48:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=489, Unknown=17, NotChecked=0, Total=600 [2023-08-27 13:48:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 612 [2023-08-27 13:48:18,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 122 transitions, 690 flow. Second operand has 25 states, 25 states have (on average 179.68) internal successors, (4492), 25 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states 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 13:48:18,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:18,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 612 [2023-08-27 13:48:18,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:20,607 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 13:48:22,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 13:48:25,091 WARN L539 Checker$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 13:48:29,312 INFO L124 PetriNetUnfolderBase]: 19517/29129 cut-off events. [2023-08-27 13:48:29,312 INFO L125 PetriNetUnfolderBase]: For 20859/20859 co-relation queries the response was YES. [2023-08-27 13:48:29,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91539 conditions, 29129 events. 19517/29129 cut-off events. For 20859/20859 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 196199 event pairs, 3067 based on Foata normal form. 628/18311 useless extension candidates. Maximal degree in co-relation 91506. Up to 8505 conditions per place. [2023-08-27 13:48:29,508 INFO L140 encePairwiseOnDemand]: 593/612 looper letters, 437 selfloop transitions, 115 changer transitions 1/553 dead transitions. [2023-08-27 13:48:29,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 553 transitions, 3824 flow [2023-08-27 13:48:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 13:48:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 13:48:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6466 transitions. [2023-08-27 13:48:29,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31074586697424067 [2023-08-27 13:48:29,519 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6466 transitions. [2023-08-27 13:48:29,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6466 transitions. [2023-08-27 13:48:29,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:29,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6466 transitions. [2023-08-27 13:48:29,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 190.1764705882353) internal successors, (6466), 34 states have internal predecessors, (6466), 0 states have call successors, (0), 0 states 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 13:48:29,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 612.0) internal successors, (21420), 35 states have internal predecessors, (21420), 0 states have call successors, (0), 0 states 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 13:48:29,551 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 612.0) internal successors, (21420), 35 states have internal predecessors, (21420), 0 states have call successors, (0), 0 states 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 13:48:29,551 INFO L175 Difference]: Start difference. First operand has 93 places, 122 transitions, 690 flow. Second operand 34 states and 6466 transitions. [2023-08-27 13:48:29,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 553 transitions, 3824 flow [2023-08-27 13:48:29,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 553 transitions, 3813 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:29,595 INFO L231 Difference]: Finished difference. Result has 142 places, 223 transitions, 1818 flow [2023-08-27 13:48:29,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1818, PETRI_PLACES=142, PETRI_TRANSITIONS=223} [2023-08-27 13:48:29,596 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 75 predicate places. [2023-08-27 13:48:29,596 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 223 transitions, 1818 flow [2023-08-27 13:48:29,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 179.68) internal successors, (4492), 25 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states 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 13:48:29,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:29,597 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-27 13:48:29,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 13:48:29,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:29,805 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:29,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash -397355325, now seen corresponding path program 1 times [2023-08-27 13:48:29,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:29,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647956171] [2023-08-27 13:48:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:29,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:29,992 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 13:48:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647956171] [2023-08-27 13:48:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647956171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536256400] [2023-08-27 13:48:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:29,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:29,997 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 13:48:30,005 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 13:48:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:30,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 13:48:30,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:30,175 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 13:48:30,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:30,364 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 13:48:30,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536256400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:30,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-27 13:48:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249947266] [2023-08-27 13:48:30,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:30,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 13:48:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 13:48:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-27 13:48:30,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 13:48:30,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 223 transitions, 1818 flow. Second operand has 25 states, 25 states have (on average 234.12) internal successors, (5853), 25 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states 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 13:48:30,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:30,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 13:48:30,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:34,121 INFO L124 PetriNetUnfolderBase]: 19621/29353 cut-off events. [2023-08-27 13:48:34,121 INFO L125 PetriNetUnfolderBase]: For 72722/72722 co-relation queries the response was YES. [2023-08-27 13:48:34,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115570 conditions, 29353 events. 19621/29353 cut-off events. For 72722/72722 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 194737 event pairs, 12226 based on Foata normal form. 72/18935 useless extension candidates. Maximal degree in co-relation 115519. Up to 29042 conditions per place. [2023-08-27 13:48:34,445 INFO L140 encePairwiseOnDemand]: 604/612 looper letters, 130 selfloop transitions, 189 changer transitions 0/319 dead transitions. [2023-08-27 13:48:34,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 319 transitions, 3188 flow [2023-08-27 13:48:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 13:48:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 13:48:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5782 transitions. [2023-08-27 13:48:34,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936546840958606 [2023-08-27 13:48:34,451 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5782 transitions. [2023-08-27 13:48:34,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5782 transitions. [2023-08-27 13:48:34,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:34,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5782 transitions. [2023-08-27 13:48:34,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 240.91666666666666) internal successors, (5782), 24 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states 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 13:48:34,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 612.0) internal successors, (15300), 25 states have internal predecessors, (15300), 0 states have call successors, (0), 0 states 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 13:48:34,466 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 612.0) internal successors, (15300), 25 states have internal predecessors, (15300), 0 states have call successors, (0), 0 states 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 13:48:34,466 INFO L175 Difference]: Start difference. First operand has 142 places, 223 transitions, 1818 flow. Second operand 24 states and 5782 transitions. [2023-08-27 13:48:34,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 319 transitions, 3188 flow [2023-08-27 13:48:34,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 319 transitions, 3121 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-08-27 13:48:34,720 INFO L231 Difference]: Finished difference. Result has 176 places, 319 transitions, 3051 flow [2023-08-27 13:48:34,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3051, PETRI_PLACES=176, PETRI_TRANSITIONS=319} [2023-08-27 13:48:34,721 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 109 predicate places. [2023-08-27 13:48:34,721 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 319 transitions, 3051 flow [2023-08-27 13:48:34,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 234.12) internal successors, (5853), 25 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states 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 13:48:34,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:34,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:34,732 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 13:48:34,927 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,SelfDestructingSolverStorable17 [2023-08-27 13:48:34,927 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:34,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash 557727562, now seen corresponding path program 1 times [2023-08-27 13:48:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:34,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668179403] [2023-08-27 13:48:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:35,621 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 13:48:35,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668179403] [2023-08-27 13:48:35,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668179403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853252754] [2023-08-27 13:48:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:35,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:35,625 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 13:48:35,654 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 13:48:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:35,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 13:48:35,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:35,903 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 13:48:35,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:48:35,965 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 13:48:35,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:36,065 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:36,066 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 41 treesize of output 33 [2023-08-27 13:48:36,069 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 13:48:36,151 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 13:48:36,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853252754] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:36,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 13:48:36,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 24 [2023-08-27 13:48:36,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501406367] [2023-08-27 13:48:36,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:36,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 13:48:36,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:36,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 13:48:36,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=562, Unknown=1, NotChecked=0, Total=650 [2023-08-27 13:48:36,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 13:48:36,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 319 transitions, 3051 flow. Second operand has 9 states, 9 states have (on average 219.55555555555554) internal successors, (1976), 9 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 13:48:36,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:36,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 13:48:36,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:40,831 INFO L124 PetriNetUnfolderBase]: 19664/29497 cut-off events. [2023-08-27 13:48:40,832 INFO L125 PetriNetUnfolderBase]: For 68354/68354 co-relation queries the response was YES. [2023-08-27 13:48:41,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115403 conditions, 29497 events. 19664/29497 cut-off events. For 68354/68354 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 197688 event pairs, 6453 based on Foata normal form. 104/19357 useless extension candidates. Maximal degree in co-relation 115339. Up to 21180 conditions per place. [2023-08-27 13:48:41,190 INFO L140 encePairwiseOnDemand]: 599/612 looper letters, 319 selfloop transitions, 73 changer transitions 0/392 dead transitions. [2023-08-27 13:48:41,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 392 transitions, 4252 flow [2023-08-27 13:48:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 13:48:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 13:48:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2060 transitions. [2023-08-27 13:48:41,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37400145243282495 [2023-08-27 13:48:41,192 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2060 transitions. [2023-08-27 13:48:41,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2060 transitions. [2023-08-27 13:48:41,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:41,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2060 transitions. [2023-08-27 13:48:41,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.88888888888889) internal successors, (2060), 9 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states 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 13:48:41,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 612.0) internal successors, (6120), 10 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states 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 13:48:41,198 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 612.0) internal successors, (6120), 10 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states 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 13:48:41,198 INFO L175 Difference]: Start difference. First operand has 176 places, 319 transitions, 3051 flow. Second operand 9 states and 2060 transitions. [2023-08-27 13:48:41,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 392 transitions, 4252 flow [2023-08-27 13:48:41,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 392 transitions, 3744 flow, removed 125 selfloop flow, removed 11 redundant places. [2023-08-27 13:48:41,490 INFO L231 Difference]: Finished difference. Result has 178 places, 338 transitions, 2964 flow [2023-08-27 13:48:41,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2964, PETRI_PLACES=178, PETRI_TRANSITIONS=338} [2023-08-27 13:48:41,491 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 111 predicate places. [2023-08-27 13:48:41,491 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 338 transitions, 2964 flow [2023-08-27 13:48:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 219.55555555555554) internal successors, (1976), 9 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 13:48:41,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:41,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:41,497 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 13:48:41,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:41,693 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:41,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:41,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2138311010, now seen corresponding path program 1 times [2023-08-27 13:48:41,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:41,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116210335] [2023-08-27 13:48:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:41,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:42,228 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 13:48:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116210335] [2023-08-27 13:48:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116210335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969687085] [2023-08-27 13:48:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:42,230 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 13:48:42,262 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 13:48:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:42,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 13:48:42,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:42,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:42,441 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 13:48:42,441 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 13:48:42,491 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 13:48:42,537 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 13:48:42,537 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 13:48:42,578 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 13:48:42,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 13:48:42,658 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 13:48:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:42,744 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 13:48:42,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:48:42,789 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 13:48:42,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:43,257 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:43,258 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 70 treesize of output 58 [2023-08-27 13:48:43,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2991 treesize of output 2911 [2023-08-27 13:48:43,304 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 233 treesize of output 221 [2023-08-27 13:48:43,317 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 443 treesize of output 419 [2023-08-27 13:48:43,331 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 302 treesize of output 254 [2023-08-27 13:48:43,343 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 371 treesize of output 323 [2023-08-27 13:48:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:43,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969687085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:43,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:43,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 13:48:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360859729] [2023-08-27 13:48:43,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:43,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 13:48:43,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:43,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 13:48:43,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=582, Unknown=18, NotChecked=0, Total=702 [2023-08-27 13:48:43,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 612 [2023-08-27 13:48:43,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 338 transitions, 2964 flow. Second operand has 27 states, 27 states have (on average 178.66666666666666) internal successors, (4824), 27 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states 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 13:48:43,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:43,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 612 [2023-08-27 13:48:43,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:46,817 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 13:48:52,587 INFO L124 PetriNetUnfolderBase]: 18561/27939 cut-off events. [2023-08-27 13:48:52,587 INFO L125 PetriNetUnfolderBase]: For 75694/75694 co-relation queries the response was YES. [2023-08-27 13:48:52,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113650 conditions, 27939 events. 18561/27939 cut-off events. For 75694/75694 co-relation queries the response was YES. Maximal size of possible extension queue 1445. Compared 188878 event pairs, 2949 based on Foata normal form. 201/19216 useless extension candidates. Maximal degree in co-relation 113581. Up to 7804 conditions per place. [2023-08-27 13:48:52,911 INFO L140 encePairwiseOnDemand]: 593/612 looper letters, 555 selfloop transitions, 172 changer transitions 2/729 dead transitions. [2023-08-27 13:48:52,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 729 transitions, 6654 flow [2023-08-27 13:48:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 13:48:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 13:48:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6603 transitions. [2023-08-27 13:48:52,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30826330532212887 [2023-08-27 13:48:52,917 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6603 transitions. [2023-08-27 13:48:52,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6603 transitions. [2023-08-27 13:48:52,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:52,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6603 transitions. [2023-08-27 13:48:52,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 188.65714285714284) internal successors, (6603), 35 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states 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 13:48:52,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 612.0) internal successors, (22032), 36 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states 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 13:48:52,941 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 612.0) internal successors, (22032), 36 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states 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 13:48:52,941 INFO L175 Difference]: Start difference. First operand has 178 places, 338 transitions, 2964 flow. Second operand 35 states and 6603 transitions. [2023-08-27 13:48:52,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 729 transitions, 6654 flow [2023-08-27 13:48:53,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 729 transitions, 6602 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-27 13:48:53,399 INFO L231 Difference]: Finished difference. Result has 216 places, 368 transitions, 3768 flow [2023-08-27 13:48:53,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3768, PETRI_PLACES=216, PETRI_TRANSITIONS=368} [2023-08-27 13:48:53,400 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 149 predicate places. [2023-08-27 13:48:53,400 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 368 transitions, 3768 flow [2023-08-27 13:48:53,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 178.66666666666666) internal successors, (4824), 27 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states 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 13:48:53,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:53,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:53,407 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 13:48:53,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:53,607 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:53,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1039396247, now seen corresponding path program 2 times [2023-08-27 13:48:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143275580] [2023-08-27 13:48:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:54,033 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 13:48:54,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:54,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143275580] [2023-08-27 13:48:54,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143275580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:54,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123192984] [2023-08-27 13:48:54,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:48:54,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:54,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:54,037 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 13:48:54,062 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 13:48:54,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:48:54,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:54,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 13:48:54,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:54,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:48:54,287 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 13:48:54,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:48:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123192984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:48:54,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:48:54,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-27 13:48:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800337305] [2023-08-27 13:48:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:48:54,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 13:48:54,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 13:48:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:48:54,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 612 [2023-08-27 13:48:54,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 368 transitions, 3768 flow. Second operand has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:54,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:54,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 612 [2023-08-27 13:48:54,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:58,681 INFO L124 PetriNetUnfolderBase]: 18690/28262 cut-off events. [2023-08-27 13:48:58,681 INFO L125 PetriNetUnfolderBase]: For 133427/133427 co-relation queries the response was YES. [2023-08-27 13:48:58,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124585 conditions, 28262 events. 18690/28262 cut-off events. For 133427/133427 co-relation queries the response was YES. Maximal size of possible extension queue 1422. Compared 190338 event pairs, 7960 based on Foata normal form. 110/20124 useless extension candidates. Maximal degree in co-relation 124510. Up to 26537 conditions per place. [2023-08-27 13:48:58,971 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 396 selfloop transitions, 21 changer transitions 1/418 dead transitions. [2023-08-27 13:48:58,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 418 transitions, 4953 flow [2023-08-27 13:48:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:48:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:48:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1478 transitions. [2023-08-27 13:48:58,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025054466230937 [2023-08-27 13:48:58,973 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1478 transitions. [2023-08-27 13:48:58,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1478 transitions. [2023-08-27 13:48:58,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:58,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1478 transitions. [2023-08-27 13:48:58,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 246.33333333333334) internal successors, (1478), 6 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states 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 13:48:58,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states 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 13:48:58,977 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states 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 13:48:58,977 INFO L175 Difference]: Start difference. First operand has 216 places, 368 transitions, 3768 flow. Second operand 6 states and 1478 transitions. [2023-08-27 13:48:58,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 418 transitions, 4953 flow [2023-08-27 13:48:59,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 418 transitions, 4720 flow, removed 59 selfloop flow, removed 16 redundant places. [2023-08-27 13:48:59,764 INFO L231 Difference]: Finished difference. Result has 208 places, 377 transitions, 3750 flow [2023-08-27 13:48:59,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3750, PETRI_PLACES=208, PETRI_TRANSITIONS=377} [2023-08-27 13:48:59,765 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 141 predicate places. [2023-08-27 13:48:59,765 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 377 transitions, 3750 flow [2023-08-27 13:48:59,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:59,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:59,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:59,770 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 13:48:59,965 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,SelfDestructingSolverStorable20 [2023-08-27 13:48:59,966 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:48:59,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash 189301101, now seen corresponding path program 1 times [2023-08-27 13:48:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430202190] [2023-08-27 13:48:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:00,300 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 13:49:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:49:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430202190] [2023-08-27 13:49:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430202190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:49:00,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398124243] [2023-08-27 13:49:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:49:00,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:49:00,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:49:00,305 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 13:49:00,313 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 13:49:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:00,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 13:49:00,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:49:00,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:00,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:00,530 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 13:49:00,531 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 13:49:00,575 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 13:49:00,639 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 13:49:00,640 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 13:49:00,683 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 13:49:00,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:00,738 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 13:49:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:00,805 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 13:49:00,929 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 13:49:00,929 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 13:49:00,953 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 13:49:00,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:49:01,492 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:01,493 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 32 treesize of output 33 [2023-08-27 13:49:01,515 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:01,515 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 1233 treesize of output 1169 [2023-08-27 13:49:01,532 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 65 treesize of output 59 [2023-08-27 13:49:01,542 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 59 treesize of output 47 [2023-08-27 13:49:01,552 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 70 treesize of output 46 [2023-08-27 13:49:01,791 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 13:49:01,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398124243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:49:01,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:49:01,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 13:49:01,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768452626] [2023-08-27 13:49:01,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:49:01,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 13:49:01,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:49:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 13:49:01,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=613, Unknown=9, NotChecked=0, Total=702 [2023-08-27 13:49:01,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 612 [2023-08-27 13:49:01,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 377 transitions, 3750 flow. Second operand has 27 states, 27 states have (on average 178.55555555555554) internal successors, (4821), 27 states have internal predecessors, (4821), 0 states have call successors, (0), 0 states 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 13:49:01,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:49:01,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 612 [2023-08-27 13:49:01,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:49:14,617 INFO L124 PetriNetUnfolderBase]: 26243/38947 cut-off events. [2023-08-27 13:49:14,618 INFO L125 PetriNetUnfolderBase]: For 177271/177271 co-relation queries the response was YES. [2023-08-27 13:49:15,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170262 conditions, 38947 events. 26243/38947 cut-off events. For 177271/177271 co-relation queries the response was YES. Maximal size of possible extension queue 2056. Compared 267794 event pairs, 5061 based on Foata normal form. 284/27431 useless extension candidates. Maximal degree in co-relation 170185. Up to 10883 conditions per place. [2023-08-27 13:49:15,157 INFO L140 encePairwiseOnDemand]: 593/612 looper letters, 728 selfloop transitions, 271 changer transitions 40/1039 dead transitions. [2023-08-27 13:49:15,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1039 transitions, 10336 flow [2023-08-27 13:49:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-27 13:49:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-27 13:49:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 10081 transitions. [2023-08-27 13:49:15,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30504115226337447 [2023-08-27 13:49:15,169 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 10081 transitions. [2023-08-27 13:49:15,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 10081 transitions. [2023-08-27 13:49:15,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:49:15,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 10081 transitions. [2023-08-27 13:49:15,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 186.6851851851852) internal successors, (10081), 54 states have internal predecessors, (10081), 0 states have call successors, (0), 0 states 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 13:49:15,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 612.0) internal successors, (33660), 55 states have internal predecessors, (33660), 0 states have call successors, (0), 0 states 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 13:49:15,209 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 612.0) internal successors, (33660), 55 states have internal predecessors, (33660), 0 states have call successors, (0), 0 states 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 13:49:15,209 INFO L175 Difference]: Start difference. First operand has 208 places, 377 transitions, 3750 flow. Second operand 54 states and 10081 transitions. [2023-08-27 13:49:15,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1039 transitions, 10336 flow [2023-08-27 13:49:15,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1039 transitions, 10298 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-27 13:49:15,863 INFO L231 Difference]: Finished difference. Result has 277 places, 532 transitions, 6512 flow [2023-08-27 13:49:15,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=3709, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6512, PETRI_PLACES=277, PETRI_TRANSITIONS=532} [2023-08-27 13:49:15,864 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 210 predicate places. [2023-08-27 13:49:15,864 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 532 transitions, 6512 flow [2023-08-27 13:49:15,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 178.55555555555554) internal successors, (4821), 27 states have internal predecessors, (4821), 0 states have call successors, (0), 0 states 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 13:49:15,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:49:15,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:49:15,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-27 13:49:16,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-27 13:49:16,065 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:49:16,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:49:16,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1644432581, now seen corresponding path program 1 times [2023-08-27 13:49:16,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:49:16,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27467572] [2023-08-27 13:49:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:49:16,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:49:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:16,748 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 13:49:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:49:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27467572] [2023-08-27 13:49:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27467572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:49:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195219647] [2023-08-27 13:49:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:49:16,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:49:16,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:49:16,749 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 13:49:16,753 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 13:49:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:16,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 13:49:16,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:49:16,944 INFO L322 Elim1Store]: treesize reduction 82, result has 24.8 percent of original size [2023-08-27 13:49:16,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 47 [2023-08-27 13:49:16,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 13:49:17,057 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 13:49:17,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 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 13:49:17,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 13:49:17,277 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 18 treesize of output 20 [2023-08-27 13:49:17,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 13:49:17,433 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 13:49:17,515 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 13:49:17,515 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 13:49:17,539 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 13:49:17,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:49:17,916 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:17,916 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 35 treesize of output 36 [2023-08-27 13:49:17,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:17,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4897 treesize of output 4769 [2023-08-27 13:49:17,952 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 141 treesize of output 135 [2023-08-27 13:49:17,964 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 282 treesize of output 234 [2023-08-27 13:49:17,975 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 111 treesize of output 99 [2023-08-27 13:49:17,988 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 122 treesize of output 98 [2023-08-27 13:49:18,318 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 13:49:18,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195219647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:49:18,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:49:18,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 13:49:18,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368111428] [2023-08-27 13:49:18,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:49:18,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 13:49:18,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:49:18,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 13:49:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=861, Unknown=16, NotChecked=0, Total=992 [2023-08-27 13:49:18,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 612 [2023-08-27 13:49:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 532 transitions, 6512 flow. Second operand has 32 states, 32 states have (on average 177.40625) internal successors, (5677), 32 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states 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 13:49:18,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:49:18,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 612 [2023-08-27 13:49:18,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:49:21,091 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 13:49:33,962 INFO L124 PetriNetUnfolderBase]: 27366/40975 cut-off events. [2023-08-27 13:49:33,963 INFO L125 PetriNetUnfolderBase]: For 263684/263684 co-relation queries the response was YES. [2023-08-27 13:49:34,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192192 conditions, 40975 events. 27366/40975 cut-off events. For 263684/263684 co-relation queries the response was YES. Maximal size of possible extension queue 2311. Compared 288617 event pairs, 7922 based on Foata normal form. 52/28721 useless extension candidates. Maximal degree in co-relation 192097. Up to 11351 conditions per place. [2023-08-27 13:49:34,523 INFO L140 encePairwiseOnDemand]: 592/612 looper letters, 614 selfloop transitions, 221 changer transitions 0/835 dead transitions. [2023-08-27 13:49:34,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 835 transitions, 9894 flow [2023-08-27 13:49:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 13:49:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 13:49:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5786 transitions. [2023-08-27 13:49:34,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30497575374235714 [2023-08-27 13:49:34,529 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5786 transitions. [2023-08-27 13:49:34,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5786 transitions. [2023-08-27 13:49:34,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:49:34,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5786 transitions. [2023-08-27 13:49:34,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 186.6451612903226) internal successors, (5786), 31 states have internal predecessors, (5786), 0 states have call successors, (0), 0 states 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 13:49:34,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 612.0) internal successors, (19584), 32 states have internal predecessors, (19584), 0 states have call successors, (0), 0 states 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 13:49:34,547 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 612.0) internal successors, (19584), 32 states have internal predecessors, (19584), 0 states have call successors, (0), 0 states 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 13:49:34,547 INFO L175 Difference]: Start difference. First operand has 277 places, 532 transitions, 6512 flow. Second operand 31 states and 5786 transitions. [2023-08-27 13:49:34,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 835 transitions, 9894 flow [2023-08-27 13:49:36,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 835 transitions, 9558 flow, removed 139 selfloop flow, removed 9 redundant places. [2023-08-27 13:49:36,736 INFO L231 Difference]: Finished difference. Result has 303 places, 555 transitions, 7052 flow [2023-08-27 13:49:36,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=6228, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7052, PETRI_PLACES=303, PETRI_TRANSITIONS=555} [2023-08-27 13:49:36,736 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 236 predicate places. [2023-08-27 13:49:36,737 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 555 transitions, 7052 flow [2023-08-27 13:49:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 177.40625) internal successors, (5677), 32 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states 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 13:49:36,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:49:36,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:49:36,743 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 13:49:36,938 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,SelfDestructingSolverStorable22 [2023-08-27 13:49:36,938 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:49:36,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:49:36,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1577860267, now seen corresponding path program 1 times [2023-08-27 13:49:36,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:49:36,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157784012] [2023-08-27 13:49:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:49:36,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:49:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:37,352 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 13:49:37,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:49:37,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157784012] [2023-08-27 13:49:37,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157784012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:49:37,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463402643] [2023-08-27 13:49:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:49:37,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:49:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:49:37,357 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 13:49:37,365 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 13:49:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:37,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 13:49:37,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:49:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:37,586 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 13:49:37,587 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 13:49:37,631 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 13:49:37,692 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 13:49:37,692 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 13:49:37,733 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 13:49:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:37,798 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 13:49:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:37,876 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 13:49:38,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:38,024 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 13:49:38,075 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 13:49:38,075 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 13:49:38,099 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 13:49:38,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:49:38,494 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:38,495 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 35 treesize of output 36 [2023-08-27 13:49:38,508 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:38,508 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 4897 treesize of output 4769 [2023-08-27 13:49:38,525 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 288 treesize of output 264 [2023-08-27 13:49:38,533 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 129 treesize of output 123 [2023-08-27 13:49:38,541 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 258 treesize of output 210 [2023-08-27 13:49:38,552 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 110 treesize of output 98 [2023-08-27 13:49:39,038 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 13:49:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463402643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:49:39,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:49:39,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-08-27 13:49:39,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458371097] [2023-08-27 13:49:39,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:49:39,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 13:49:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:49:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 13:49:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=765, Unknown=12, NotChecked=0, Total=870 [2023-08-27 13:49:39,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 612 [2023-08-27 13:49:39,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 555 transitions, 7052 flow. Second operand has 30 states, 30 states have (on average 177.5) internal successors, (5325), 30 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states 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 13:49:39,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:49:39,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 612 [2023-08-27 13:49:39,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:49:47,623 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_1039 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1039) c_~q1~0.base) .cse0) |c_thread2Thread1of1ForFork0_~s~0#1|) 2147483648)) (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) (forall ((v_ArrVal_1039 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1039) c_~q1~0.base) .cse0) 2147483648))))) is different from false [2023-08-27 13:50:01,916 WARN L234 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 75 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 13:50:06,578 INFO L124 PetriNetUnfolderBase]: 28611/43117 cut-off events. [2023-08-27 13:50:06,578 INFO L125 PetriNetUnfolderBase]: For 284207/284207 co-relation queries the response was YES. [2023-08-27 13:50:07,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202728 conditions, 43117 events. 28611/43117 cut-off events. For 284207/284207 co-relation queries the response was YES. Maximal size of possible extension queue 2501. Compared 309120 event pairs, 6753 based on Foata normal form. 153/30048 useless extension candidates. Maximal degree in co-relation 202626. Up to 11681 conditions per place. [2023-08-27 13:50:07,341 INFO L140 encePairwiseOnDemand]: 587/612 looper letters, 755 selfloop transitions, 262 changer transitions 1/1018 dead transitions. [2023-08-27 13:50:07,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1018 transitions, 11502 flow [2023-08-27 13:50:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 13:50:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 13:50:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 7517 transitions. [2023-08-27 13:50:07,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3070669934640523 [2023-08-27 13:50:07,348 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 7517 transitions. [2023-08-27 13:50:07,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 7517 transitions. [2023-08-27 13:50:07,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:07,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 7517 transitions. [2023-08-27 13:50:07,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 187.925) internal successors, (7517), 40 states have internal predecessors, (7517), 0 states have call successors, (0), 0 states 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 13:50:07,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 612.0) internal successors, (25092), 41 states have internal predecessors, (25092), 0 states have call successors, (0), 0 states 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 13:50:07,375 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 612.0) internal successors, (25092), 41 states have internal predecessors, (25092), 0 states have call successors, (0), 0 states 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 13:50:07,375 INFO L175 Difference]: Start difference. First operand has 303 places, 555 transitions, 7052 flow. Second operand 40 states and 7517 transitions. [2023-08-27 13:50:07,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1018 transitions, 11502 flow [2023-08-27 13:50:10,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1018 transitions, 11401 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-08-27 13:50:10,206 INFO L231 Difference]: Finished difference. Result has 342 places, 574 transitions, 8010 flow [2023-08-27 13:50:10,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=6865, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=8010, PETRI_PLACES=342, PETRI_TRANSITIONS=574} [2023-08-27 13:50:10,206 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 275 predicate places. [2023-08-27 13:50:10,207 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 574 transitions, 8010 flow [2023-08-27 13:50:10,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 177.5) internal successors, (5325), 30 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states 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 13:50:10,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:10,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:10,213 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 13:50:10,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:10,409 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:50:10,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1978480630, now seen corresponding path program 1 times [2023-08-27 13:50:10,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:10,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025219736] [2023-08-27 13:50:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:10,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:10,776 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 13:50:10,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:10,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025219736] [2023-08-27 13:50:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025219736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:10,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817203544] [2023-08-27 13:50:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:10,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:10,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:10,785 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 13:50:10,789 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 13:50:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:10,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 13:50:10,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:10,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:50:11,006 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 13:50:11,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:50:11,034 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 13:50:11,034 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 13:50:11,039 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 13:50:11,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817203544] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:11,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 13:50:11,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 14 [2023-08-27 13:50:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831405168] [2023-08-27 13:50:11,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:50:11,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:50:11,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:11,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:50:11,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-27 13:50:11,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 612 [2023-08-27 13:50:11,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 574 transitions, 8010 flow. Second operand has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 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 13:50:11,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:11,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 612 [2023-08-27 13:50:11,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:19,914 INFO L124 PetriNetUnfolderBase]: 28631/43185 cut-off events. [2023-08-27 13:50:19,914 INFO L125 PetriNetUnfolderBase]: For 362040/362040 co-relation queries the response was YES. [2023-08-27 13:50:20,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223251 conditions, 43185 events. 28631/43185 cut-off events. For 362040/362040 co-relation queries the response was YES. Maximal size of possible extension queue 2509. Compared 311709 event pairs, 8279 based on Foata normal form. 93/30360 useless extension candidates. Maximal degree in co-relation 223138. Up to 31164 conditions per place. [2023-08-27 13:50:20,732 INFO L140 encePairwiseOnDemand]: 600/612 looper letters, 461 selfloop transitions, 172 changer transitions 0/633 dead transitions. [2023-08-27 13:50:20,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 633 transitions, 9907 flow [2023-08-27 13:50:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:50:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:50:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1252 transitions. [2023-08-27 13:50:20,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091503267973856 [2023-08-27 13:50:20,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1252 transitions. [2023-08-27 13:50:20,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1252 transitions. [2023-08-27 13:50:20,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:20,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1252 transitions. [2023-08-27 13:50:20,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.4) internal successors, (1252), 5 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 13:50:20,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:50:20,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:50:20,738 INFO L175 Difference]: Start difference. First operand has 342 places, 574 transitions, 8010 flow. Second operand 5 states and 1252 transitions. [2023-08-27 13:50:20,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 633 transitions, 9907 flow [2023-08-27 13:50:24,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 633 transitions, 9642 flow, removed 46 selfloop flow, removed 15 redundant places. [2023-08-27 13:50:24,287 INFO L231 Difference]: Finished difference. Result has 334 places, 590 transitions, 8772 flow [2023-08-27 13:50:24,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=7728, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8772, PETRI_PLACES=334, PETRI_TRANSITIONS=590} [2023-08-27 13:50:24,287 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 267 predicate places. [2023-08-27 13:50:24,287 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 590 transitions, 8772 flow [2023-08-27 13:50:24,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 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 13:50:24,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:24,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:24,293 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 13:50:24,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:24,488 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:50:24,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1763091699, now seen corresponding path program 1 times [2023-08-27 13:50:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:24,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31651160] [2023-08-27 13:50:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:24,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:24,873 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 13:50:24,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:24,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31651160] [2023-08-27 13:50:24,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31651160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:24,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747375326] [2023-08-27 13:50:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:24,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:24,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:24,877 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 13:50:24,879 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 13:50:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:25,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 13:50:25,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:25,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:50:25,115 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 13:50:25,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:50:25,150 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 13:50:25,150 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 13:50:25,157 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 13:50:25,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747375326] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:25,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 13:50:25,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 14 [2023-08-27 13:50:25,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599912786] [2023-08-27 13:50:25,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:50:25,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:50:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:50:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-27 13:50:25,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 612 [2023-08-27 13:50:25,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 590 transitions, 8772 flow. Second operand has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 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 13:50:25,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:25,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 612 [2023-08-27 13:50:25,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:34,951 INFO L124 PetriNetUnfolderBase]: 28576/43101 cut-off events. [2023-08-27 13:50:34,952 INFO L125 PetriNetUnfolderBase]: For 451888/451888 co-relation queries the response was YES. [2023-08-27 13:50:35,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239701 conditions, 43101 events. 28576/43101 cut-off events. For 451888/451888 co-relation queries the response was YES. Maximal size of possible extension queue 2391. Compared 309652 event pairs, 8567 based on Foata normal form. 49/30232 useless extension candidates. Maximal degree in co-relation 239586. Up to 30466 conditions per place. [2023-08-27 13:50:35,760 INFO L140 encePairwiseOnDemand]: 600/612 looper letters, 461 selfloop transitions, 170 changer transitions 3/634 dead transitions. [2023-08-27 13:50:35,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 634 transitions, 10344 flow [2023-08-27 13:50:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:50:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:50:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1251 transitions. [2023-08-27 13:50:35,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2023-08-27 13:50:35,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1251 transitions. [2023-08-27 13:50:35,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1251 transitions. [2023-08-27 13:50:35,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:35,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1251 transitions. [2023-08-27 13:50:35,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.2) internal successors, (1251), 5 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 13:50:35,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:50:35,766 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 13:50:35,766 INFO L175 Difference]: Start difference. First operand has 334 places, 590 transitions, 8772 flow. Second operand 5 states and 1251 transitions. [2023-08-27 13:50:35,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 634 transitions, 10344 flow [2023-08-27 13:50:40,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 634 transitions, 10281 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-27 13:50:40,249 INFO L231 Difference]: Finished difference. Result has 337 places, 586 transitions, 8992 flow [2023-08-27 13:50:40,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8696, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8992, PETRI_PLACES=337, PETRI_TRANSITIONS=586} [2023-08-27 13:50:40,249 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 270 predicate places. [2023-08-27 13:50:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 586 transitions, 8992 flow [2023-08-27 13:50:40,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 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 13:50:40,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:40,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:40,257 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 13:50:40,456 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,SelfDestructingSolverStorable25 [2023-08-27 13:50:40,456 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:50:40,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:40,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1756666698, now seen corresponding path program 2 times [2023-08-27 13:50:40,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:40,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368996463] [2023-08-27 13:50:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:40,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:40,883 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 13:50:40,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368996463] [2023-08-27 13:50:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368996463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774787996] [2023-08-27 13:50:40,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:50:40,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:40,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:40,889 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 13:50:40,892 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 13:50:41,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:50:41,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:50:41,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 13:50:41,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:41,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:50:41,216 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 13:50:41,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:50:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774787996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:50:41,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:50:41,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 13:50:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503413457] [2023-08-27 13:50:41,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:50:41,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 13:50:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 13:50:41,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-08-27 13:50:41,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 612 [2023-08-27 13:50:41,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 586 transitions, 8992 flow. Second operand has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:41,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:41,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 612 [2023-08-27 13:50:41,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:50,658 INFO L124 PetriNetUnfolderBase]: 28227/42508 cut-off events. [2023-08-27 13:50:50,658 INFO L125 PetriNetUnfolderBase]: For 571957/571957 co-relation queries the response was YES. [2023-08-27 13:50:51,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246183 conditions, 42508 events. 28227/42508 cut-off events. For 571957/571957 co-relation queries the response was YES. Maximal size of possible extension queue 2357. Compared 301472 event pairs, 15385 based on Foata normal form. 18/29844 useless extension candidates. Maximal degree in co-relation 246067. Up to 40569 conditions per place. [2023-08-27 13:50:51,633 INFO L140 encePairwiseOnDemand]: 604/612 looper letters, 573 selfloop transitions, 54 changer transitions 0/627 dead transitions. [2023-08-27 13:50:51,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 627 transitions, 10465 flow [2023-08-27 13:50:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:50:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:50:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1476 transitions. [2023-08-27 13:50:51,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019607843137255 [2023-08-27 13:50:51,635 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1476 transitions. [2023-08-27 13:50:51,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1476 transitions. [2023-08-27 13:50:51,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:51,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1476 transitions. [2023-08-27 13:50:51,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 13:50:51,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states 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 13:50:51,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states 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 13:50:51,638 INFO L175 Difference]: Start difference. First operand has 337 places, 586 transitions, 8992 flow. Second operand 6 states and 1476 transitions. [2023-08-27 13:50:51,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 627 transitions, 10465 flow [2023-08-27 13:50:55,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 627 transitions, 10353 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 13:50:55,669 INFO L231 Difference]: Finished difference. Result has 340 places, 586 transitions, 9014 flow [2023-08-27 13:50:55,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9014, PETRI_PLACES=340, PETRI_TRANSITIONS=586} [2023-08-27 13:50:55,670 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 273 predicate places. [2023-08-27 13:50:55,670 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 586 transitions, 9014 flow [2023-08-27 13:50:55,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:55,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:55,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:55,677 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 13:50:55,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 13:50:55,877 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:50:55,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1899652469, now seen corresponding path program 2 times [2023-08-27 13:50:55,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:55,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409313238] [2023-08-27 13:50:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:55,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:56,313 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 13:50:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409313238] [2023-08-27 13:50:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409313238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207338921] [2023-08-27 13:50:56,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:50:56,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:56,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:56,317 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 13:50:56,323 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 13:50:56,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:50:56,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:50:56,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 13:50:56,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:56,550 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 18 treesize of output 16 [2023-08-27 13:50:56,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:50:56,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 13:50:56,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:50:56,664 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 13:50:56,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:50:56,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207338921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:50:56,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:50:56,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-27 13:50:56,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225790475] [2023-08-27 13:50:56,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:50:56,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 13:50:56,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 13:50:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-27 13:50:56,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 612 [2023-08-27 13:50:56,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 586 transitions, 9014 flow. Second operand has 8 states, 8 states have (on average 220.75) internal successors, (1766), 8 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states 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 13:50:56,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:56,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 612 [2023-08-27 13:50:56,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:06,846 INFO L124 PetriNetUnfolderBase]: 29360/44115 cut-off events. [2023-08-27 13:51:06,847 INFO L125 PetriNetUnfolderBase]: For 596370/596370 co-relation queries the response was YES. [2023-08-27 13:51:07,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255446 conditions, 44115 events. 29360/44115 cut-off events. For 596370/596370 co-relation queries the response was YES. Maximal size of possible extension queue 2393. Compared 312677 event pairs, 14539 based on Foata normal form. 30/30939 useless extension candidates. Maximal degree in co-relation 255329. Up to 35277 conditions per place. [2023-08-27 13:51:08,061 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 550 selfloop transitions, 109 changer transitions 0/659 dead transitions. [2023-08-27 13:51:08,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 659 transitions, 11107 flow [2023-08-27 13:51:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:51:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:51:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1623 transitions. [2023-08-27 13:51:08,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3788515406162465 [2023-08-27 13:51:08,063 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1623 transitions. [2023-08-27 13:51:08,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1623 transitions. [2023-08-27 13:51:08,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:08,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1623 transitions. [2023-08-27 13:51:08,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 231.85714285714286) internal successors, (1623), 7 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 13:51:08,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 612.0) internal successors, (4896), 8 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states 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 13:51:08,066 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 612.0) internal successors, (4896), 8 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states 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 13:51:08,066 INFO L175 Difference]: Start difference. First operand has 340 places, 586 transitions, 9014 flow. Second operand 7 states and 1623 transitions. [2023-08-27 13:51:08,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 659 transitions, 11107 flow [2023-08-27 13:51:12,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 659 transitions, 11043 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 13:51:12,049 INFO L231 Difference]: Finished difference. Result has 346 places, 600 transitions, 9570 flow [2023-08-27 13:51:12,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8950, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9570, PETRI_PLACES=346, PETRI_TRANSITIONS=600} [2023-08-27 13:51:12,049 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 279 predicate places. [2023-08-27 13:51:12,050 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 600 transitions, 9570 flow [2023-08-27 13:51:12,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 220.75) internal successors, (1766), 8 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states 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 13:51:12,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:12,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:12,057 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 13:51:12,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 13:51:12,256 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:51:12,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1784541219, now seen corresponding path program 2 times [2023-08-27 13:51:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:12,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054468311] [2023-08-27 13:51:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:12,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:12,707 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 13:51:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054468311] [2023-08-27 13:51:12,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054468311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256502908] [2023-08-27 13:51:12,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:51:12,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:12,709 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 13:51:12,738 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 13:51:12,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:51:12,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:51:12,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 13:51:12,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:51:13,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 13:51:13,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:51:13,050 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 13:51:13,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:51:13,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256502908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:51:13,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:51:13,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-27 13:51:13,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954150723] [2023-08-27 13:51:13,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:51:13,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 13:51:13,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 13:51:13,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-27 13:51:13,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 612 [2023-08-27 13:51:13,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 600 transitions, 9570 flow. Second operand has 8 states, 8 states have (on average 220.75) internal successors, (1766), 8 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states 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 13:51:13,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:13,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 612 [2023-08-27 13:51:13,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:22,813 INFO L124 PetriNetUnfolderBase]: 29520/44469 cut-off events. [2023-08-27 13:51:22,813 INFO L125 PetriNetUnfolderBase]: For 637973/637973 co-relation queries the response was YES. [2023-08-27 13:51:23,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262931 conditions, 44469 events. 29520/44469 cut-off events. For 637973/637973 co-relation queries the response was YES. Maximal size of possible extension queue 2463. Compared 319811 event pairs, 10813 based on Foata normal form. 30/31173 useless extension candidates. Maximal degree in co-relation 262811. Up to 28236 conditions per place. [2023-08-27 13:51:23,712 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 468 selfloop transitions, 177 changer transitions 0/645 dead transitions. [2023-08-27 13:51:23,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 645 transitions, 11137 flow [2023-08-27 13:51:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:51:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:51:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1627 transitions. [2023-08-27 13:51:23,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37978524743230624 [2023-08-27 13:51:23,714 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1627 transitions. [2023-08-27 13:51:23,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1627 transitions. [2023-08-27 13:51:23,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:23,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1627 transitions. [2023-08-27 13:51:23,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 232.42857142857142) internal successors, (1627), 7 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 13:51:23,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 612.0) internal successors, (4896), 8 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states 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 13:51:23,717 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 612.0) internal successors, (4896), 8 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states 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 13:51:23,717 INFO L175 Difference]: Start difference. First operand has 346 places, 600 transitions, 9570 flow. Second operand 7 states and 1627 transitions. [2023-08-27 13:51:23,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 645 transitions, 11137 flow [2023-08-27 13:51:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 645 transitions, 11060 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 13:51:28,059 INFO L231 Difference]: Finished difference. Result has 351 places, 600 transitions, 10047 flow [2023-08-27 13:51:28,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=9478, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10047, PETRI_PLACES=351, PETRI_TRANSITIONS=600} [2023-08-27 13:51:28,060 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 284 predicate places. [2023-08-27 13:51:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 600 transitions, 10047 flow [2023-08-27 13:51:28,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 220.75) internal successors, (1766), 8 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states 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 13:51:28,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:28,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 13:51:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 13:51:28,267 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:51:28,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash -770366682, now seen corresponding path program 1 times [2023-08-27 13:51:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:28,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907244866] [2023-08-27 13:51:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:28,355 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 13:51:28,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907244866] [2023-08-27 13:51:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907244866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387472569] [2023-08-27 13:51:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:28,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:28,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:28,361 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 13:51:28,366 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 13:51:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:28,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 13:51:28,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:28,620 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 13:51:28,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:28,672 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 13:51:28,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387472569] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:51:28,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:51:28,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-27 13:51:28,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481825005] [2023-08-27 13:51:28,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:51:28,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 13:51:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:28,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 13:51:28,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-27 13:51:28,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 612 [2023-08-27 13:51:28,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 600 transitions, 10047 flow. Second operand has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states 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 13:51:28,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:28,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 612 [2023-08-27 13:51:28,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:42,793 INFO L124 PetriNetUnfolderBase]: 40834/62661 cut-off events. [2023-08-27 13:51:42,793 INFO L125 PetriNetUnfolderBase]: For 1438304/1438304 co-relation queries the response was YES. [2023-08-27 13:51:44,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377855 conditions, 62661 events. 40834/62661 cut-off events. For 1438304/1438304 co-relation queries the response was YES. Maximal size of possible extension queue 3257. Compared 480966 event pairs, 21364 based on Foata normal form. 6000/49667 useless extension candidates. Maximal degree in co-relation 377733. Up to 42915 conditions per place. [2023-08-27 13:51:44,328 INFO L140 encePairwiseOnDemand]: 600/612 looper letters, 724 selfloop transitions, 128 changer transitions 31/883 dead transitions. [2023-08-27 13:51:44,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 883 transitions, 16459 flow [2023-08-27 13:51:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 13:51:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 13:51:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2268 transitions. [2023-08-27 13:51:44,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37058823529411766 [2023-08-27 13:51:44,331 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2268 transitions. [2023-08-27 13:51:44,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2268 transitions. [2023-08-27 13:51:44,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:44,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2268 transitions. [2023-08-27 13:51:44,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 226.8) internal successors, (2268), 10 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 13:51:44,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 612.0) internal successors, (6732), 11 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 13:51:44,336 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 612.0) internal successors, (6732), 11 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 13:51:44,336 INFO L175 Difference]: Start difference. First operand has 351 places, 600 transitions, 10047 flow. Second operand 10 states and 2268 transitions. [2023-08-27 13:51:44,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 883 transitions, 16459 flow [2023-08-27 13:51:52,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 883 transitions, 16226 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-27 13:51:52,366 INFO L231 Difference]: Finished difference. Result has 361 places, 653 transitions, 11421 flow [2023-08-27 13:51:52,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=9878, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11421, PETRI_PLACES=361, PETRI_TRANSITIONS=653} [2023-08-27 13:51:52,367 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 294 predicate places. [2023-08-27 13:51:52,367 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 653 transitions, 11421 flow [2023-08-27 13:51:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states 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 13:51:52,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:52,368 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:52,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 13:51:52,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:52,576 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:51:52,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:52,577 INFO L85 PathProgramCache]: Analyzing trace with hash 98375593, now seen corresponding path program 1 times [2023-08-27 13:51:52,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:52,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077689073] [2023-08-27 13:51:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:52,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:53,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:53,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077689073] [2023-08-27 13:51:53,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077689073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841404506] [2023-08-27 13:51:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:53,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:53,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:53,659 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 13:51:53,665 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 13:51:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:53,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 13:51:53,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:54,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:51:54,008 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 13:51:54,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:51:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 13:51:54,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:54,095 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1459 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1459) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-08-27 13:51:54,104 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:54,104 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 41 treesize of output 33 [2023-08-27 13:51:54,107 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 13:51:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 13:51:54,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841404506] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:54,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 13:51:54,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 8] total 25 [2023-08-27 13:51:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267068337] [2023-08-27 13:51:54,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:51:54,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 13:51:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 13:51:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=564, Unknown=1, NotChecked=48, Total=702 [2023-08-27 13:51:54,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 612 [2023-08-27 13:51:54,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 653 transitions, 11421 flow. Second operand has 8 states, 8 states have (on average 220.875) internal successors, (1767), 8 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states 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 13:51:54,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:54,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 612 [2023-08-27 13:51:54,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:52:08,826 INFO L124 PetriNetUnfolderBase]: 40890/62627 cut-off events. [2023-08-27 13:52:08,826 INFO L125 PetriNetUnfolderBase]: For 1066278/1066278 co-relation queries the response was YES. [2023-08-27 13:52:10,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385649 conditions, 62627 events. 40890/62627 cut-off events. For 1066278/1066278 co-relation queries the response was YES. Maximal size of possible extension queue 2936. Compared 479893 event pairs, 10294 based on Foata normal form. 98/43731 useless extension candidates. Maximal degree in co-relation 385524. Up to 43347 conditions per place. [2023-08-27 13:52:10,638 INFO L140 encePairwiseOnDemand]: 594/612 looper letters, 522 selfloop transitions, 186 changer transitions 19/727 dead transitions. [2023-08-27 13:52:10,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 727 transitions, 13868 flow [2023-08-27 13:52:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:52:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:52:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1852 transitions. [2023-08-27 13:52:10,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37826797385620914 [2023-08-27 13:52:10,642 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1852 transitions. [2023-08-27 13:52:10,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1852 transitions. [2023-08-27 13:52:10,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:52:10,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1852 transitions. [2023-08-27 13:52:10,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.5) internal successors, (1852), 8 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states 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 13:52:10,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 13:52:10,648 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 13:52:10,648 INFO L175 Difference]: Start difference. First operand has 361 places, 653 transitions, 11421 flow. Second operand 8 states and 1852 transitions. [2023-08-27 13:52:10,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 727 transitions, 13868 flow [2023-08-27 13:52:20,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 727 transitions, 13765 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-27 13:52:20,198 INFO L231 Difference]: Finished difference. Result has 368 places, 663 transitions, 12296 flow [2023-08-27 13:52:20,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=11302, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12296, PETRI_PLACES=368, PETRI_TRANSITIONS=663} [2023-08-27 13:52:20,199 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 301 predicate places. [2023-08-27 13:52:20,199 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 663 transitions, 12296 flow [2023-08-27 13:52:20,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 220.875) internal successors, (1767), 8 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states 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 13:52:20,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:52:20,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:52:20,204 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 13:52:20,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:20,400 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:52:20,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:52:20,400 INFO L85 PathProgramCache]: Analyzing trace with hash 162724397, now seen corresponding path program 2 times [2023-08-27 13:52:20,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:52:20,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191120988] [2023-08-27 13:52:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:52:20,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:52:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:52:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:52:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191120988] [2023-08-27 13:52:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191120988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:52:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070752049] [2023-08-27 13:52:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:52:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:52:21,461 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 13:52:21,464 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 13:52:21,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:52:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:52:21,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 13:52:21,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:52:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:52:21,851 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 13:52:21,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:52:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 13:52:21,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:52:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070752049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:52:21,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:52:21,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 19 [2023-08-27 13:52:21,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134254193] [2023-08-27 13:52:21,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:52:21,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 13:52:21,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:52:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 13:52:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-08-27 13:52:21,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 13:52:21,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 663 transitions, 12296 flow. Second operand has 9 states, 9 states have (on average 219.66666666666666) internal successors, (1977), 9 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 13:52:21,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:52:21,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 13:52:21,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:52:38,303 INFO L124 PetriNetUnfolderBase]: 43567/67479 cut-off events. [2023-08-27 13:52:38,304 INFO L125 PetriNetUnfolderBase]: For 1454734/1454734 co-relation queries the response was YES. [2023-08-27 13:52:39,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439469 conditions, 67479 events. 43567/67479 cut-off events. For 1454734/1454734 co-relation queries the response was YES. Maximal size of possible extension queue 3211. Compared 530545 event pairs, 22170 based on Foata normal form. 70/46469 useless extension candidates. Maximal degree in co-relation 439339. Up to 58740 conditions per place. [2023-08-27 13:52:39,847 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 627 selfloop transitions, 91 changer transitions 8/726 dead transitions. [2023-08-27 13:52:39,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 726 transitions, 14306 flow [2023-08-27 13:52:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:52:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:52:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1845 transitions. [2023-08-27 13:52:39,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37683823529411764 [2023-08-27 13:52:39,849 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1845 transitions. [2023-08-27 13:52:39,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1845 transitions. [2023-08-27 13:52:39,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:52:39,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1845 transitions. [2023-08-27 13:52:39,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 230.625) internal successors, (1845), 8 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states 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 13:52:39,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 13:52:39,853 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 13:52:39,853 INFO L175 Difference]: Start difference. First operand has 368 places, 663 transitions, 12296 flow. Second operand 8 states and 1845 transitions. [2023-08-27 13:52:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 726 transitions, 14306 flow [2023-08-27 13:52:49,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 726 transitions, 13981 flow, removed 28 selfloop flow, removed 13 redundant places. [2023-08-27 13:52:49,850 INFO L231 Difference]: Finished difference. Result has 357 places, 663 transitions, 12208 flow [2023-08-27 13:52:49,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=11985, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12208, PETRI_PLACES=357, PETRI_TRANSITIONS=663} [2023-08-27 13:52:49,850 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 290 predicate places. [2023-08-27 13:52:49,850 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 663 transitions, 12208 flow [2023-08-27 13:52:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 219.66666666666666) internal successors, (1977), 9 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 13:52:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:52:49,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:52:49,857 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 13:52:50,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:50,052 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 13:52:50,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:52:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash 102725323, now seen corresponding path program 2 times [2023-08-27 13:52:50,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:52:50,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025261808] [2023-08-27 13:52:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:52:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:52:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:52:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:51,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:52:51,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025261808] [2023-08-27 13:52:51,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025261808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:52:51,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912097965] [2023-08-27 13:52:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:52:51,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:52:51,166 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 13:52:51,167 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 13:52:51,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:52:51,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:52:51,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 13:52:51,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:52:51,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:52:51,626 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 13:52:51,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-27 13:52:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 13:52:51,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:52:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912097965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:52:51,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:52:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 19 [2023-08-27 13:52:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700154612] [2023-08-27 13:52:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:52:51,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 13:52:51,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:52:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 13:52:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-27 13:52:51,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 13:52:51,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 663 transitions, 12208 flow. Second operand has 9 states, 9 states have (on average 219.66666666666666) internal successors, (1977), 9 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 13:52:51,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:52:51,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 13:52:51,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:53:07,684 INFO L124 PetriNetUnfolderBase]: 43647/67758 cut-off events. [2023-08-27 13:53:07,684 INFO L125 PetriNetUnfolderBase]: For 1340382/1340382 co-relation queries the response was YES. [2023-08-27 13:53:08,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433872 conditions, 67758 events. 43647/67758 cut-off events. For 1340382/1340382 co-relation queries the response was YES. Maximal size of possible extension queue 3231. Compared 535243 event pairs, 23134 based on Foata normal form. 81/46639 useless extension candidates. Maximal degree in co-relation 433748. Up to 63792 conditions per place. [2023-08-27 13:53:09,411 INFO L140 encePairwiseOnDemand]: 604/612 looper letters, 656 selfloop transitions, 49 changer transitions 3/708 dead transitions. [2023-08-27 13:53:09,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 708 transitions, 13986 flow [2023-08-27 13:53:09,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:53:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:53:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1835 transitions. [2023-08-27 13:53:09,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37479575163398693 [2023-08-27 13:53:09,413 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1835 transitions. [2023-08-27 13:53:09,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1835 transitions. [2023-08-27 13:53:09,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:53:09,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1835 transitions. [2023-08-27 13:53:09,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 229.375) internal successors, (1835), 8 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states 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 13:53:09,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 13:53:09,416 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 13:53:09,416 INFO L175 Difference]: Start difference. First operand has 357 places, 663 transitions, 12208 flow. Second operand 8 states and 1835 transitions. [2023-08-27 13:53:09,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 708 transitions, 13986 flow