/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:14:24,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:14:25,014 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 07:14:25,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:14:25,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:14:25,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:14:25,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:14:25,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:14:25,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:14:25,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:14:25,056 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:14:25,056 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:14:25,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:14:25,057 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:14:25,058 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:14:25,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:14:25,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:14:25,058 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:14:25,058 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:14:25,059 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:14:25,059 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:14:25,060 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:14:25,060 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:14:25,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:14:25,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:14:25,061 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:14:25,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:14:25,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:14:25,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:14:25,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:14:25,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:14:25,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:14:25,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:14:25,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:14:25,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:14:25,064 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:14:25,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:14:25,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:14:25,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:14:25,382 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:14:25,383 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:14:25,384 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-27 07:14:26,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:14:26,830 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:14:26,831 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-27 07:14:26,837 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d677a7166/9d165222b5014bfe8bf17090748cebfd/FLAGcf5ed768a [2023-08-27 07:14:26,847 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d677a7166/9d165222b5014bfe8bf17090748cebfd [2023-08-27 07:14:26,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:14:26,851 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:14:26,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:14:26,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:14:26,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:14:26,855 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:14:26" (1/1) ... [2023-08-27 07:14:26,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a93b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:26, skipping insertion in model container [2023-08-27 07:14:26,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:14:26" (1/1) ... [2023-08-27 07:14:26,877 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:14:27,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:14:27,097 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:14:27,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:14:27,165 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:14:27,165 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:14:27,171 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:14:27,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27 WrapperNode [2023-08-27 07:14:27,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:14:27,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:14:27,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:14:27,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:14:27,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,239 INFO L138 Inliner]: procedures = 25, calls = 64, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 365 [2023-08-27 07:14:27,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:14:27,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:14:27,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:14:27,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:14:27,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,295 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:14:27,298 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:14:27,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:14:27,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:14:27,299 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (1/1) ... [2023-08-27 07:14:27,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:14:27,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:27,327 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 07:14:27,340 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 07:14:27,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:14:27,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:14:27,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:14:27,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:14:27,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:14:27,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:14:27,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:14:27,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:14:27,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 07:14:27,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 07:14:27,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:14:27,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:14:27,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:14:27,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 07:14:27,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:14:27,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:14:27,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:14:27,369 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 07:14:27,477 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:14:27,479 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:14:28,020 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:14:28,245 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:14:28,245 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-27 07:14:28,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:14:28 BoogieIcfgContainer [2023-08-27 07:14:28,247 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:14:28,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:14:28,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:14:28,252 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:14:28,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:14:26" (1/3) ... [2023-08-27 07:14:28,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f32d7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:14:28, skipping insertion in model container [2023-08-27 07:14:28,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:27" (2/3) ... [2023-08-27 07:14:28,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f32d7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:14:28, skipping insertion in model container [2023-08-27 07:14:28,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:14:28" (3/3) ... [2023-08-27 07:14:28,254 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2023-08-27 07:14:28,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:14:28,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-08-27 07:14:28,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:14:28,359 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 07:14:28,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 313 transitions, 650 flow [2023-08-27 07:14:28,472 INFO L124 PetriNetUnfolderBase]: 25/310 cut-off events. [2023-08-27 07:14:28,472 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:14:28,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 310 events. 25/310 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 405 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 261. Up to 3 conditions per place. [2023-08-27 07:14:28,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 313 transitions, 650 flow [2023-08-27 07:14:28,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 299 transitions, 616 flow [2023-08-27 07:14:28,491 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:14:28,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 299 transitions, 616 flow [2023-08-27 07:14:28,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 299 transitions, 616 flow [2023-08-27 07:14:28,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 299 transitions, 616 flow [2023-08-27 07:14:28,549 INFO L124 PetriNetUnfolderBase]: 25/299 cut-off events. [2023-08-27 07:14:28,549 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:14:28,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 299 events. 25/299 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 402 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 261. Up to 3 conditions per place. [2023-08-27 07:14:28,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 6258 [2023-08-27 07:14:40,077 INFO L134 LiptonReduction]: Checked pairs total: 19336 [2023-08-27 07:14:40,077 INFO L136 LiptonReduction]: Total number of compositions: 327 [2023-08-27 07:14:40,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:14:40,093 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;@4223db85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:14:40,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-08-27 07:14:40,095 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:14:40,096 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 07:14:40,096 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 07:14:40,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:40,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 07:14:40,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:40,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash 47008, now seen corresponding path program 1 times [2023-08-27 07:14:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:40,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896447771] [2023-08-27 07:14:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:40,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:40,356 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 07:14:40,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896447771] [2023-08-27 07:14:40,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896447771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:40,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:40,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:14:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411161999] [2023-08-27 07:14:40,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:40,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:14:40,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 640 [2023-08-27 07:14:40,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:40,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:40,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 640 [2023-08-27 07:14:40,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:41,807 INFO L124 PetriNetUnfolderBase]: 8462/11805 cut-off events. [2023-08-27 07:14:41,807 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2023-08-27 07:14:41,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24036 conditions, 11805 events. 8462/11805 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 61912 event pairs, 7157 based on Foata normal form. 0/4938 useless extension candidates. Maximal degree in co-relation 22588. Up to 11795 conditions per place. [2023-08-27 07:14:41,882 INFO L140 encePairwiseOnDemand]: 619/640 looper letters, 60 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2023-08-27 07:14:41,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 298 flow [2023-08-27 07:14:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-27 07:14:41,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109375 [2023-08-27 07:14:41,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-27 07:14:41,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-27 07:14:41,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:41,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-27 07:14:41,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:41,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:41,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:41,924 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 156 flow. Second operand 3 states and 789 transitions. [2023-08-27 07:14:41,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 298 flow [2023-08-27 07:14:41,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 286 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 07:14:41,946 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 210 flow [2023-08-27 07:14:41,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2023-08-27 07:14:41,950 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2023-08-27 07:14:41,951 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 210 flow [2023-08-27 07:14:41,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:41,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:41,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:14:41,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:14:41,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:41,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:41,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1458685, now seen corresponding path program 1 times [2023-08-27 07:14:41,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:41,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829154219] [2023-08-27 07:14:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:41,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:42,031 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 07:14:42,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829154219] [2023-08-27 07:14:42,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829154219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:42,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:42,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:14:42,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152989494] [2023-08-27 07:14:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:42,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:14:42,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:14:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:14:42,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 640 [2023-08-27 07:14:42,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:42,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:42,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 640 [2023-08-27 07:14:42,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:43,259 INFO L124 PetriNetUnfolderBase]: 8459/11799 cut-off events. [2023-08-27 07:14:43,260 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-27 07:14:43,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23780 conditions, 11799 events. 8459/11799 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 61787 event pairs, 7157 based on Foata normal form. 2/4944 useless extension candidates. Maximal degree in co-relation 23721. Up to 11786 conditions per place. [2023-08-27 07:14:43,329 INFO L140 encePairwiseOnDemand]: 630/640 looper letters, 56 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-08-27 07:14:43,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 308 flow [2023-08-27 07:14:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:14:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:14:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1014 transitions. [2023-08-27 07:14:43,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39609375 [2023-08-27 07:14:43,333 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1014 transitions. [2023-08-27 07:14:43,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1014 transitions. [2023-08-27 07:14:43,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:43,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1014 transitions. [2023-08-27 07:14:43,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.5) internal successors, (1014), 4 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:43,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:43,345 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:43,345 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 210 flow. Second operand 4 states and 1014 transitions. [2023-08-27 07:14:43,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 308 flow [2023-08-27 07:14:43,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:14:43,348 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 182 flow [2023-08-27 07:14:43,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2023-08-27 07:14:43,350 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -10 predicate places. [2023-08-27 07:14:43,350 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 182 flow [2023-08-27 07:14:43,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:43,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:43,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:14:43,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 07:14:43,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:43,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1458686, now seen corresponding path program 1 times [2023-08-27 07:14:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658276514] [2023-08-27 07:14:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:43,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:43,470 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 07:14:43,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:43,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658276514] [2023-08-27 07:14:43,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658276514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:14:43,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688040890] [2023-08-27 07:14:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:43,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:43,474 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 07:14:43,510 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 07:14:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:43,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:14:43,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:14:43,628 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 07:14:43,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:14:43,646 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 07:14:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688040890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:14:43,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:14:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 07:14:43,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976519076] [2023-08-27 07:14:43,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:14:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 07:14:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 07:14:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:14:43,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 640 [2023-08-27 07:14:43,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:43,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:43,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 640 [2023-08-27 07:14:43,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:44,724 INFO L124 PetriNetUnfolderBase]: 8468/11817 cut-off events. [2023-08-27 07:14:44,724 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-27 07:14:44,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23844 conditions, 11817 events. 8468/11817 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 61831 event pairs, 7157 based on Foata normal form. 0/4961 useless extension candidates. Maximal degree in co-relation 23721. Up to 11798 conditions per place. [2023-08-27 07:14:44,783 INFO L140 encePairwiseOnDemand]: 630/640 looper letters, 57 selfloop transitions, 25 changer transitions 0/82 dead transitions. [2023-08-27 07:14:44,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 436 flow [2023-08-27 07:14:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:14:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:14:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1507 transitions. [2023-08-27 07:14:44,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924479166666667 [2023-08-27 07:14:44,788 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1507 transitions. [2023-08-27 07:14:44,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1507 transitions. [2023-08-27 07:14:44,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:44,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1507 transitions. [2023-08-27 07:14:44,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.16666666666666) internal successors, (1507), 6 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:44,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 640.0) internal successors, (4480), 7 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:44,801 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 640.0) internal successors, (4480), 7 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:44,801 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 182 flow. Second operand 6 states and 1507 transitions. [2023-08-27 07:14:44,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 436 flow [2023-08-27 07:14:44,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:14:44,805 INFO L231 Difference]: Finished difference. Result has 65 places, 82 transitions, 356 flow [2023-08-27 07:14:44,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=65, PETRI_TRANSITIONS=82} [2023-08-27 07:14:44,806 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2023-08-27 07:14:44,807 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 82 transitions, 356 flow [2023-08-27 07:14:44,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:44,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:44,808 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 07:14:44,827 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 07:14:45,014 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 07:14:45,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:45,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash 507469600, now seen corresponding path program 2 times [2023-08-27 07:14:45,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:45,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764471433] [2023-08-27 07:14:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:45,141 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 07:14:45,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764471433] [2023-08-27 07:14:45,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764471433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:14:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127019040] [2023-08-27 07:14:45,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:14:45,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:45,144 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 07:14:45,147 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 07:14:45,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:14:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:14:45,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:14:45,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:14:45,253 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 07:14:45,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:14:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127019040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:45,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:14:45,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 07:14:45,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011967736] [2023-08-27 07:14:45,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:45,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:14:45,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 640 [2023-08-27 07:14:45,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 82 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:45,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:45,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 640 [2023-08-27 07:14:45,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:46,337 INFO L124 PetriNetUnfolderBase]: 8468/11816 cut-off events. [2023-08-27 07:14:46,337 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-08-27 07:14:46,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23883 conditions, 11816 events. 8468/11816 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 61789 event pairs, 7157 based on Foata normal form. 1/4965 useless extension candidates. Maximal degree in co-relation 23795. Up to 11811 conditions per place. [2023-08-27 07:14:46,401 INFO L140 encePairwiseOnDemand]: 637/640 looper letters, 75 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2023-08-27 07:14:46,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 508 flow [2023-08-27 07:14:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-08-27 07:14:46,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036458333333333 [2023-08-27 07:14:46,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-08-27 07:14:46,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-08-27 07:14:46,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:46,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-08-27 07:14:46,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:46,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:46,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:46,412 INFO L175 Difference]: Start difference. First operand has 65 places, 82 transitions, 356 flow. Second operand 3 states and 775 transitions. [2023-08-27 07:14:46,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 508 flow [2023-08-27 07:14:46,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 471 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-27 07:14:46,420 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 321 flow [2023-08-27 07:14:46,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2023-08-27 07:14:46,421 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2023-08-27 07:14:46,422 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 321 flow [2023-08-27 07:14:46,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:46,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:46,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:46,429 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 07:14:46,629 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 07:14:46,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:46,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash -475361359, now seen corresponding path program 1 times [2023-08-27 07:14:46,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:46,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861596373] [2023-08-27 07:14:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:46,758 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 07:14:46,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:46,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861596373] [2023-08-27 07:14:46,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861596373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:46,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:46,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:14:46,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118218804] [2023-08-27 07:14:46,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:46,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:14:46,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:46,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:14:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:14:46,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 640 [2023-08-27 07:14:46,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 221.75) internal successors, (887), 4 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:46,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:46,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 640 [2023-08-27 07:14:46,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:47,872 INFO L124 PetriNetUnfolderBase]: 8608/12061 cut-off events. [2023-08-27 07:14:47,872 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2023-08-27 07:14:47,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24414 conditions, 12061 events. 8608/12061 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 63286 event pairs, 7280 based on Foata normal form. 90/5243 useless extension candidates. Maximal degree in co-relation 24283. Up to 11815 conditions per place. [2023-08-27 07:14:47,929 INFO L140 encePairwiseOnDemand]: 632/640 looper letters, 117 selfloop transitions, 3 changer transitions 1/121 dead transitions. [2023-08-27 07:14:47,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 121 transitions, 743 flow [2023-08-27 07:14:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:14:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:14:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 968 transitions. [2023-08-27 07:14:47,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2023-08-27 07:14:47,933 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 968 transitions. [2023-08-27 07:14:47,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 968 transitions. [2023-08-27 07:14:47,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:47,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 968 transitions. [2023-08-27 07:14:47,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:47,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:47,942 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:47,942 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 321 flow. Second operand 4 states and 968 transitions. [2023-08-27 07:14:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 121 transitions, 743 flow [2023-08-27 07:14:47,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 121 transitions, 731 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:14:47,947 INFO L231 Difference]: Finished difference. Result has 67 places, 81 transitions, 326 flow [2023-08-27 07:14:47,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=67, PETRI_TRANSITIONS=81} [2023-08-27 07:14:47,949 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2023-08-27 07:14:47,949 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 81 transitions, 326 flow [2023-08-27 07:14:47,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.75) internal successors, (887), 4 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:47,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:47,952 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 07:14:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 07:14:47,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:47,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash -515954126, now seen corresponding path program 1 times [2023-08-27 07:14:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:47,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957629125] [2023-08-27 07:14:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:48,052 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 07:14:48,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:48,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957629125] [2023-08-27 07:14:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957629125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:14:48,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248304029] [2023-08-27 07:14:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:48,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:48,054 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 07:14:48,057 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 07:14:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:48,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 07:14:48,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:14:48,180 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 07:14:48,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:14:48,234 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 07:14:48,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248304029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:14:48,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:14:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 07:14:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353718752] [2023-08-27 07:14:48,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:14:48,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 07:14:48,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:48,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 07:14:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 07:14:48,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 640 [2023-08-27 07:14:48,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 81 transitions, 326 flow. Second operand has 13 states, 13 states have (on average 237.15384615384616) internal successors, (3083), 13 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:48,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:48,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 640 [2023-08-27 07:14:48,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:49,132 INFO L124 PetriNetUnfolderBase]: 8638/12121 cut-off events. [2023-08-27 07:14:49,133 INFO L125 PetriNetUnfolderBase]: For 729/729 co-relation queries the response was YES. [2023-08-27 07:14:49,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25956 conditions, 12121 events. 8638/12121 cut-off events. For 729/729 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 64012 event pairs, 7280 based on Foata normal form. 24/5237 useless extension candidates. Maximal degree in co-relation 25604. Up to 12043 conditions per place. [2023-08-27 07:14:49,198 INFO L140 encePairwiseOnDemand]: 631/640 looper letters, 56 selfloop transitions, 61 changer transitions 0/117 dead transitions. [2023-08-27 07:14:49,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 117 transitions, 782 flow [2023-08-27 07:14:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 07:14:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 07:14:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2961 transitions. [2023-08-27 07:14:49,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385546875 [2023-08-27 07:14:49,206 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2961 transitions. [2023-08-27 07:14:49,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2961 transitions. [2023-08-27 07:14:49,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:49,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2961 transitions. [2023-08-27 07:14:49,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 246.75) internal successors, (2961), 12 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:49,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 640.0) internal successors, (8320), 13 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:49,324 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 640.0) internal successors, (8320), 13 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:49,324 INFO L175 Difference]: Start difference. First operand has 67 places, 81 transitions, 326 flow. Second operand 12 states and 2961 transitions. [2023-08-27 07:14:49,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 117 transitions, 782 flow [2023-08-27 07:14:49,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 776 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 07:14:49,328 INFO L231 Difference]: Finished difference. Result has 83 places, 117 transitions, 750 flow [2023-08-27 07:14:49,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=750, PETRI_PLACES=83, PETRI_TRANSITIONS=117} [2023-08-27 07:14:49,329 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2023-08-27 07:14:49,329 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 117 transitions, 750 flow [2023-08-27 07:14:49,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 237.15384615384616) internal successors, (3083), 13 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:49,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:49,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:49,338 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 07:14:49,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:49,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:49,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -974991341, now seen corresponding path program 1 times [2023-08-27 07:14:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:49,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861373676] [2023-08-27 07:14:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:49,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:49,655 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 07:14:49,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:49,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861373676] [2023-08-27 07:14:49,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861373676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:14:49,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479271775] [2023-08-27 07:14:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:49,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:49,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:49,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:14:49,660 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 07:14:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:49,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:14:49,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:14:49,794 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 07:14:49,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:14:49,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479271775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:49,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:14:49,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 07:14:49,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494263195] [2023-08-27 07:14:49,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:49,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:49,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:14:49,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 640 [2023-08-27 07:14:49,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 117 transitions, 750 flow. Second operand has 3 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 07:14:49,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:49,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 640 [2023-08-27 07:14:49,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:50,705 INFO L124 PetriNetUnfolderBase]: 7310/10265 cut-off events. [2023-08-27 07:14:50,705 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2023-08-27 07:14:50,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21799 conditions, 10265 events. 7310/10265 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 52743 event pairs, 6088 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 21602. Up to 10265 conditions per place. [2023-08-27 07:14:50,736 INFO L140 encePairwiseOnDemand]: 637/640 looper letters, 114 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-08-27 07:14:50,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 115 transitions, 972 flow [2023-08-27 07:14:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 825 transitions. [2023-08-27 07:14:50,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296875 [2023-08-27 07:14:50,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 825 transitions. [2023-08-27 07:14:50,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 825 transitions. [2023-08-27 07:14:50,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:50,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 825 transitions. [2023-08-27 07:14:50,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:50,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:50,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:50,745 INFO L175 Difference]: Start difference. First operand has 83 places, 117 transitions, 750 flow. Second operand 3 states and 825 transitions. [2023-08-27 07:14:50,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 115 transitions, 972 flow [2023-08-27 07:14:50,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 115 transitions, 794 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-08-27 07:14:50,749 INFO L231 Difference]: Finished difference. Result has 78 places, 115 transitions, 566 flow [2023-08-27 07:14:50,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=566, PETRI_PLACES=78, PETRI_TRANSITIONS=115} [2023-08-27 07:14:50,750 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 9 predicate places. [2023-08-27 07:14:50,750 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 115 transitions, 566 flow [2023-08-27 07:14:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:14:50,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:50,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:50,760 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 07:14:50,956 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 07:14:50,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:50,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash -159956611, now seen corresponding path program 1 times [2023-08-27 07:14:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:50,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336455465] [2023-08-27 07:14:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:51,033 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 07:14:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:51,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336455465] [2023-08-27 07:14:51,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336455465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:51,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:51,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:14:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516541117] [2023-08-27 07:14:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:51,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:51,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:14:51,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 640 [2023-08-27 07:14:51,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 115 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:51,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:51,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 640 [2023-08-27 07:14:51,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:51,775 INFO L124 PetriNetUnfolderBase]: 6822/9577 cut-off events. [2023-08-27 07:14:51,775 INFO L125 PetriNetUnfolderBase]: For 738/738 co-relation queries the response was YES. [2023-08-27 07:14:51,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20242 conditions, 9577 events. 6822/9577 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 48633 event pairs, 5640 based on Foata normal form. 0/4365 useless extension candidates. Maximal degree in co-relation 20222. Up to 9577 conditions per place. [2023-08-27 07:14:51,873 INFO L140 encePairwiseOnDemand]: 638/640 looper letters, 113 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-08-27 07:14:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 114 transitions, 792 flow [2023-08-27 07:14:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2023-08-27 07:14:51,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42864583333333334 [2023-08-27 07:14:51,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2023-08-27 07:14:51,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2023-08-27 07:14:51,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:51,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2023-08-27 07:14:51,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:51,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:51,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:51,881 INFO L175 Difference]: Start difference. First operand has 78 places, 115 transitions, 566 flow. Second operand 3 states and 823 transitions. [2023-08-27 07:14:51,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 114 transitions, 792 flow [2023-08-27 07:14:51,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 791 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:14:51,886 INFO L231 Difference]: Finished difference. Result has 78 places, 114 transitions, 565 flow [2023-08-27 07:14:51,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=563, 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=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=565, PETRI_PLACES=78, PETRI_TRANSITIONS=114} [2023-08-27 07:14:51,886 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 9 predicate places. [2023-08-27 07:14:51,886 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 114 transitions, 565 flow [2023-08-27 07:14:51,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:51,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:51,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:51,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 07:14:51,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:51,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:51,888 INFO L85 PathProgramCache]: Analyzing trace with hash -159956612, now seen corresponding path program 1 times [2023-08-27 07:14:51,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:51,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833058056] [2023-08-27 07:14:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:52,076 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 07:14:52,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:52,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833058056] [2023-08-27 07:14:52,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833058056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:14:52,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562250732] [2023-08-27 07:14:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:52,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:52,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:52,079 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 07:14:52,110 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 07:14:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:52,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 07:14:52,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:14:52,245 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 07:14:52,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:14:52,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562250732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:52,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:14:52,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-08-27 07:14:52,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040497576] [2023-08-27 07:14:52,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:52,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:14:52,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:52,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:14:52,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-27 07:14:52,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 640 [2023-08-27 07:14:52,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 114 transitions, 565 flow. Second operand has 4 states, 4 states have (on average 255.25) internal successors, (1021), 4 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:52,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:52,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 640 [2023-08-27 07:14:52,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:52,929 INFO L124 PetriNetUnfolderBase]: 7022/9777 cut-off events. [2023-08-27 07:14:52,930 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2023-08-27 07:14:52,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21043 conditions, 9777 events. 7022/9777 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 52271 event pairs, 2504 based on Foata normal form. 0/4565 useless extension candidates. Maximal degree in co-relation 21022. Up to 5309 conditions per place. [2023-08-27 07:14:52,976 INFO L140 encePairwiseOnDemand]: 632/640 looper letters, 122 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2023-08-27 07:14:52,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 139 transitions, 901 flow [2023-08-27 07:14:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:14:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:14:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1092 transitions. [2023-08-27 07:14:52,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265625 [2023-08-27 07:14:52,980 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1092 transitions. [2023-08-27 07:14:52,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1092 transitions. [2023-08-27 07:14:53,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:53,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1092 transitions. [2023-08-27 07:14:53,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:53,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:53,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:53,041 INFO L175 Difference]: Start difference. First operand has 78 places, 114 transitions, 565 flow. Second operand 4 states and 1092 transitions. [2023-08-27 07:14:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 139 transitions, 901 flow [2023-08-27 07:14:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 139 transitions, 900 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:14:53,046 INFO L231 Difference]: Finished difference. Result has 81 places, 115 transitions, 641 flow [2023-08-27 07:14:53,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=641, PETRI_PLACES=81, PETRI_TRANSITIONS=115} [2023-08-27 07:14:53,046 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 12 predicate places. [2023-08-27 07:14:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 115 transitions, 641 flow [2023-08-27 07:14:53,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.25) internal successors, (1021), 4 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:53,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:53,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:53,063 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 07:14:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:53,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:53,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash -663691000, now seen corresponding path program 1 times [2023-08-27 07:14:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:53,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403511254] [2023-08-27 07:14:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:53,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:53,404 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 07:14:53,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:53,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403511254] [2023-08-27 07:14:53,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403511254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:53,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:53,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:14:53,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494927699] [2023-08-27 07:14:53,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:53,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:14:53,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:14:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:14:53,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 640 [2023-08-27 07:14:53,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 115 transitions, 641 flow. Second operand has 4 states, 4 states have (on average 254.5) internal successors, (1018), 4 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:53,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:53,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 640 [2023-08-27 07:14:53,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:54,817 INFO L124 PetriNetUnfolderBase]: 12438/17029 cut-off events. [2023-08-27 07:14:54,817 INFO L125 PetriNetUnfolderBase]: For 7119/7119 co-relation queries the response was YES. [2023-08-27 07:14:54,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40862 conditions, 17029 events. 12438/17029 cut-off events. For 7119/7119 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 90701 event pairs, 2170 based on Foata normal form. 308/8411 useless extension candidates. Maximal degree in co-relation 40838. Up to 8719 conditions per place. [2023-08-27 07:14:54,912 INFO L140 encePairwiseOnDemand]: 628/640 looper letters, 183 selfloop transitions, 15 changer transitions 0/198 dead transitions. [2023-08-27 07:14:54,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 198 transitions, 1257 flow [2023-08-27 07:14:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:14:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:14:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1402 transitions. [2023-08-27 07:14:54,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438125 [2023-08-27 07:14:54,916 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1402 transitions. [2023-08-27 07:14:54,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1402 transitions. [2023-08-27 07:14:54,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:54,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1402 transitions. [2023-08-27 07:14:54,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:54,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 640.0) internal successors, (3840), 6 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:54,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 640.0) internal successors, (3840), 6 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:54,925 INFO L175 Difference]: Start difference. First operand has 81 places, 115 transitions, 641 flow. Second operand 5 states and 1402 transitions. [2023-08-27 07:14:54,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 198 transitions, 1257 flow [2023-08-27 07:14:54,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 198 transitions, 1256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:14:54,935 INFO L231 Difference]: Finished difference. Result has 87 places, 129 transitions, 779 flow [2023-08-27 07:14:54,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=779, PETRI_PLACES=87, PETRI_TRANSITIONS=129} [2023-08-27 07:14:54,936 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 18 predicate places. [2023-08-27 07:14:54,936 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 129 transitions, 779 flow [2023-08-27 07:14:54,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.5) internal successors, (1018), 4 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:54,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:54,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:54,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 07:14:54,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:54,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash -663689074, now seen corresponding path program 1 times [2023-08-27 07:14:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443826916] [2023-08-27 07:14:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:54,989 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 07:14:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443826916] [2023-08-27 07:14:54,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443826916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:54,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:54,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:14:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374235220] [2023-08-27 07:14:54,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:54,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:14:54,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 640 [2023-08-27 07:14:54,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 129 transitions, 779 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:54,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:54,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 640 [2023-08-27 07:14:54,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:57,224 INFO L124 PetriNetUnfolderBase]: 21348/29081 cut-off events. [2023-08-27 07:14:57,224 INFO L125 PetriNetUnfolderBase]: For 20964/20964 co-relation queries the response was YES. [2023-08-27 07:14:57,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84018 conditions, 29081 events. 21348/29081 cut-off events. For 20964/20964 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 163244 event pairs, 9024 based on Foata normal form. 470/15997 useless extension candidates. Maximal degree in co-relation 83990. Up to 16974 conditions per place. [2023-08-27 07:14:57,467 INFO L140 encePairwiseOnDemand]: 636/640 looper letters, 181 selfloop transitions, 4 changer transitions 0/185 dead transitions. [2023-08-27 07:14:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 185 transitions, 1400 flow [2023-08-27 07:14:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 866 transitions. [2023-08-27 07:14:57,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4510416666666667 [2023-08-27 07:14:57,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 866 transitions. [2023-08-27 07:14:57,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 866 transitions. [2023-08-27 07:14:57,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:57,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 866 transitions. [2023-08-27 07:14:57,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.6666666666667) internal successors, (866), 3 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:57,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:57,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:57,475 INFO L175 Difference]: Start difference. First operand has 87 places, 129 transitions, 779 flow. Second operand 3 states and 866 transitions. [2023-08-27 07:14:57,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 185 transitions, 1400 flow [2023-08-27 07:14:57,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 185 transitions, 1400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 07:14:57,564 INFO L231 Difference]: Finished difference. Result has 90 places, 132 transitions, 828 flow [2023-08-27 07:14:57,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=90, PETRI_TRANSITIONS=132} [2023-08-27 07:14:57,564 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 21 predicate places. [2023-08-27 07:14:57,564 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 132 transitions, 828 flow [2023-08-27 07:14:57,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:57,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:57,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:57,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 07:14:57,565 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:57,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:57,566 INFO L85 PathProgramCache]: Analyzing trace with hash 988141594, now seen corresponding path program 1 times [2023-08-27 07:14:57,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:57,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835302836] [2023-08-27 07:14:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:57,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:57,648 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 07:14:57,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:57,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835302836] [2023-08-27 07:14:57,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835302836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:57,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:57,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:14:57,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99061946] [2023-08-27 07:14:57,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:14:57,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 640 [2023-08-27 07:14:57,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 132 transitions, 828 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:57,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:57,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 640 [2023-08-27 07:14:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:59,089 INFO L124 PetriNetUnfolderBase]: 14400/19949 cut-off events. [2023-08-27 07:14:59,089 INFO L125 PetriNetUnfolderBase]: For 19851/19851 co-relation queries the response was YES. [2023-08-27 07:14:59,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59128 conditions, 19949 events. 14400/19949 cut-off events. For 19851/19851 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 108199 event pairs, 6140 based on Foata normal form. 312/11085 useless extension candidates. Maximal degree in co-relation 59098. Up to 17475 conditions per place. [2023-08-27 07:14:59,282 INFO L140 encePairwiseOnDemand]: 636/640 looper letters, 165 selfloop transitions, 6 changer transitions 0/171 dead transitions. [2023-08-27 07:14:59,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 171 transitions, 1361 flow [2023-08-27 07:14:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 842 transitions. [2023-08-27 07:14:59,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43854166666666666 [2023-08-27 07:14:59,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 842 transitions. [2023-08-27 07:14:59,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 842 transitions. [2023-08-27 07:14:59,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:59,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 842 transitions. [2023-08-27 07:14:59,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,289 INFO L175 Difference]: Start difference. First operand has 90 places, 132 transitions, 828 flow. Second operand 3 states and 842 transitions. [2023-08-27 07:14:59,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 171 transitions, 1361 flow [2023-08-27 07:14:59,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 171 transitions, 1357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:14:59,327 INFO L231 Difference]: Finished difference. Result has 92 places, 134 transitions, 862 flow [2023-08-27 07:14:59,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=862, PETRI_PLACES=92, PETRI_TRANSITIONS=134} [2023-08-27 07:14:59,328 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2023-08-27 07:14:59,328 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 134 transitions, 862 flow [2023-08-27 07:14:59,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:59,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:14:59,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 07:14:59,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:59,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1867685512, now seen corresponding path program 1 times [2023-08-27 07:14:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809703069] [2023-08-27 07:14:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:59,376 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 07:14:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:59,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809703069] [2023-08-27 07:14:59,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809703069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:59,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:14:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766775575] [2023-08-27 07:14:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:59,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:14:59,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 640 [2023-08-27 07:14:59,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 134 transitions, 862 flow. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:59,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 640 [2023-08-27 07:14:59,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:00,728 INFO L124 PetriNetUnfolderBase]: 12322/17065 cut-off events. [2023-08-27 07:15:00,728 INFO L125 PetriNetUnfolderBase]: For 21314/21314 co-relation queries the response was YES. [2023-08-27 07:15:00,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51523 conditions, 17065 events. 12322/17065 cut-off events. For 21314/21314 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 89546 event pairs, 3266 based on Foata normal form. 164/9003 useless extension candidates. Maximal degree in co-relation 51491. Up to 15545 conditions per place. [2023-08-27 07:15:00,881 INFO L140 encePairwiseOnDemand]: 630/640 looper letters, 151 selfloop transitions, 5 changer transitions 0/156 dead transitions. [2023-08-27 07:15:00,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 156 transitions, 1259 flow [2023-08-27 07:15:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 848 transitions. [2023-08-27 07:15:00,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-08-27 07:15:00,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 848 transitions. [2023-08-27 07:15:00,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 848 transitions. [2023-08-27 07:15:00,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:00,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 848 transitions. [2023-08-27 07:15:00,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,887 INFO L175 Difference]: Start difference. First operand has 92 places, 134 transitions, 862 flow. Second operand 3 states and 848 transitions. [2023-08-27 07:15:00,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 156 transitions, 1259 flow [2023-08-27 07:15:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:00,933 INFO L231 Difference]: Finished difference. Result has 94 places, 136 transitions, 872 flow [2023-08-27 07:15:00,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=872, PETRI_PLACES=94, PETRI_TRANSITIONS=136} [2023-08-27 07:15:00,933 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 25 predicate places. [2023-08-27 07:15:00,933 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 136 transitions, 872 flow [2023-08-27 07:15:00,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:00,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 07:15:00,934 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:00,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash 874491358, now seen corresponding path program 1 times [2023-08-27 07:15:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506101629] [2023-08-27 07:15:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:01,057 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 07:15:01,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:01,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506101629] [2023-08-27 07:15:01,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506101629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:01,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:01,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:15:01,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511189762] [2023-08-27 07:15:01,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:01,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:15:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:01,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:15:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:15:01,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 640 [2023-08-27 07:15:01,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 136 transitions, 872 flow. Second operand has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:01,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:01,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 640 [2023-08-27 07:15:01,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:02,639 INFO L124 PetriNetUnfolderBase]: 12868/17953 cut-off events. [2023-08-27 07:15:02,639 INFO L125 PetriNetUnfolderBase]: For 23817/23817 co-relation queries the response was YES. [2023-08-27 07:15:02,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59535 conditions, 17953 events. 12868/17953 cut-off events. For 23817/23817 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95723 event pairs, 7884 based on Foata normal form. 124/10373 useless extension candidates. Maximal degree in co-relation 59501. Up to 17053 conditions per place. [2023-08-27 07:15:02,820 INFO L140 encePairwiseOnDemand]: 628/640 looper letters, 162 selfloop transitions, 15 changer transitions 7/184 dead transitions. [2023-08-27 07:15:02,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 184 transitions, 1582 flow [2023-08-27 07:15:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:15:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:15:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1192 transitions. [2023-08-27 07:15:02,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725 [2023-08-27 07:15:02,823 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1192 transitions. [2023-08-27 07:15:02,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1192 transitions. [2023-08-27 07:15:02,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:02,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1192 transitions. [2023-08-27 07:15:02,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.4) internal successors, (1192), 5 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 640.0) internal successors, (3840), 6 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,827 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 640.0) internal successors, (3840), 6 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,828 INFO L175 Difference]: Start difference. First operand has 94 places, 136 transitions, 872 flow. Second operand 5 states and 1192 transitions. [2023-08-27 07:15:02,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 184 transitions, 1582 flow [2023-08-27 07:15:02,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 184 transitions, 1577 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:02,880 INFO L231 Difference]: Finished difference. Result has 99 places, 138 transitions, 936 flow [2023-08-27 07:15:02,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=936, PETRI_PLACES=99, PETRI_TRANSITIONS=138} [2023-08-27 07:15:02,881 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 30 predicate places. [2023-08-27 07:15:02,881 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 138 transitions, 936 flow [2023-08-27 07:15:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:02,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:02,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 07:15:02,882 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:02,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:02,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2074665885, now seen corresponding path program 1 times [2023-08-27 07:15:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:02,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169585190] [2023-08-27 07:15:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:02,937 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 07:15:02,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169585190] [2023-08-27 07:15:02,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169585190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375072668] [2023-08-27 07:15:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:02,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:02,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:02,938 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 07:15:02,942 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 07:15:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:03,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:15:03,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:15:03,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:03,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375072668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:03,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:03,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 07:15:03,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185362312] [2023-08-27 07:15:03,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:15:03,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:15:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:15:03,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 640 [2023-08-27 07:15:03,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 138 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 260.25) internal successors, (1041), 4 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:03,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 640 [2023-08-27 07:15:03,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:04,426 INFO L124 PetriNetUnfolderBase]: 11664/16275 cut-off events. [2023-08-27 07:15:04,427 INFO L125 PetriNetUnfolderBase]: For 22762/22762 co-relation queries the response was YES. [2023-08-27 07:15:04,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55313 conditions, 16275 events. 11664/16275 cut-off events. For 22762/22762 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 85541 event pairs, 4344 based on Foata normal form. 0/9671 useless extension candidates. Maximal degree in co-relation 55277. Up to 13708 conditions per place. [2023-08-27 07:15:04,548 INFO L140 encePairwiseOnDemand]: 637/640 looper letters, 184 selfloop transitions, 2 changer transitions 1/187 dead transitions. [2023-08-27 07:15:04,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 187 transitions, 1503 flow [2023-08-27 07:15:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:15:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:15:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1124 transitions. [2023-08-27 07:15:04,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390625 [2023-08-27 07:15:04,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1124 transitions. [2023-08-27 07:15:04,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1124 transitions. [2023-08-27 07:15:04,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:04,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1124 transitions. [2023-08-27 07:15:04,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:04,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:04,556 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:04,556 INFO L175 Difference]: Start difference. First operand has 99 places, 138 transitions, 936 flow. Second operand 4 states and 1124 transitions. [2023-08-27 07:15:04,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 187 transitions, 1503 flow [2023-08-27 07:15:04,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 187 transitions, 1485 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:04,607 INFO L231 Difference]: Finished difference. Result has 100 places, 137 transitions, 914 flow [2023-08-27 07:15:04,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=914, PETRI_PLACES=100, PETRI_TRANSITIONS=137} [2023-08-27 07:15:04,608 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 31 predicate places. [2023-08-27 07:15:04,608 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 137 transitions, 914 flow [2023-08-27 07:15:04,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 260.25) internal successors, (1041), 4 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:04,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:04,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:04,617 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 07:15:04,814 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,SelfDestructingSolverStorable14 [2023-08-27 07:15:04,814 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:04,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:04,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2074665886, now seen corresponding path program 1 times [2023-08-27 07:15:04,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:04,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459964963] [2023-08-27 07:15:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:04,867 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 07:15:04,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459964963] [2023-08-27 07:15:04,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459964963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815462467] [2023-08-27 07:15:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:04,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:04,869 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 07:15:04,892 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 07:15:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:05,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:15:05,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:05,026 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 07:15:05,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:05,045 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 07:15:05,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815462467] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:15:05,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:15:05,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 07:15:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886675419] [2023-08-27 07:15:05,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:15:05,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:15:05,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:15:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:15:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 640 [2023-08-27 07:15:05,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 137 transitions, 914 flow. Second operand has 7 states, 7 states have (on average 260.42857142857144) internal successors, (1823), 7 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:05,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:05,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 640 [2023-08-27 07:15:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:10,535 INFO L124 PetriNetUnfolderBase]: 38160/52281 cut-off events. [2023-08-27 07:15:10,535 INFO L125 PetriNetUnfolderBase]: For 67590/67590 co-relation queries the response was YES. [2023-08-27 07:15:10,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178989 conditions, 52281 events. 38160/52281 cut-off events. For 67590/67590 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 296958 event pairs, 9382 based on Foata normal form. 1422/31817 useless extension candidates. Maximal degree in co-relation 178953. Up to 14400 conditions per place. [2023-08-27 07:15:11,002 INFO L140 encePairwiseOnDemand]: 637/640 looper letters, 348 selfloop transitions, 11 changer transitions 1/360 dead transitions. [2023-08-27 07:15:11,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 360 transitions, 2752 flow [2023-08-27 07:15:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:15:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:15:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1753 transitions. [2023-08-27 07:15:11,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45651041666666664 [2023-08-27 07:15:11,005 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1753 transitions. [2023-08-27 07:15:11,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1753 transitions. [2023-08-27 07:15:11,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:11,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1753 transitions. [2023-08-27 07:15:11,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 292.1666666666667) internal successors, (1753), 6 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 640.0) internal successors, (4480), 7 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,010 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 640.0) internal successors, (4480), 7 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,010 INFO L175 Difference]: Start difference. First operand has 100 places, 137 transitions, 914 flow. Second operand 6 states and 1753 transitions. [2023-08-27 07:15:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 360 transitions, 2752 flow [2023-08-27 07:15:11,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 360 transitions, 2749 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:11,321 INFO L231 Difference]: Finished difference. Result has 106 places, 146 transitions, 1060 flow [2023-08-27 07:15:11,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1060, PETRI_PLACES=106, PETRI_TRANSITIONS=146} [2023-08-27 07:15:11,322 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 37 predicate places. [2023-08-27 07:15:11,322 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 146 transitions, 1060 flow [2023-08-27 07:15:11,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 260.42857142857144) internal successors, (1823), 7 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:11,323 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 07:15:11,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 07:15:11,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:11,523 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:11,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 932889746, now seen corresponding path program 2 times [2023-08-27 07:15:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810254880] [2023-08-27 07:15:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:11,723 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 07:15:11,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:11,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810254880] [2023-08-27 07:15:11,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810254880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:11,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857032025] [2023-08-27 07:15:11,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:15:11,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:11,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:11,725 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 07:15:11,753 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 07:15:11,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:15:11,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:15:11,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:15:11,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:11,902 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 07:15:11,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:11,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857032025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:11,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:11,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 07:15:11,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701770553] [2023-08-27 07:15:11,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:11,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:15:11,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:15:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:15:11,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 640 [2023-08-27 07:15:11,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 146 transitions, 1060 flow. Second operand has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:11,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 640 [2023-08-27 07:15:11,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:15,889 INFO L124 PetriNetUnfolderBase]: 30276/41487 cut-off events. [2023-08-27 07:15:15,889 INFO L125 PetriNetUnfolderBase]: For 72159/72159 co-relation queries the response was YES. [2023-08-27 07:15:16,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146574 conditions, 41487 events. 30276/41487 cut-off events. For 72159/72159 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 229092 event pairs, 17204 based on Foata normal form. 2/25209 useless extension candidates. Maximal degree in co-relation 146535. Up to 41442 conditions per place. [2023-08-27 07:15:16,242 INFO L140 encePairwiseOnDemand]: 635/640 looper letters, 131 selfloop transitions, 12 changer transitions 0/143 dead transitions. [2023-08-27 07:15:16,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1316 flow [2023-08-27 07:15:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:15:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:15:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 996 transitions. [2023-08-27 07:15:16,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890625 [2023-08-27 07:15:16,244 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 996 transitions. [2023-08-27 07:15:16,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 996 transitions. [2023-08-27 07:15:16,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:16,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 996 transitions. [2023-08-27 07:15:16,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:16,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:16,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 640.0) internal successors, (3200), 5 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:16,249 INFO L175 Difference]: Start difference. First operand has 106 places, 146 transitions, 1060 flow. Second operand 4 states and 996 transitions. [2023-08-27 07:15:16,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1316 flow [2023-08-27 07:15:16,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1296 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:16,440 INFO L231 Difference]: Finished difference. Result has 105 places, 143 transitions, 1034 flow [2023-08-27 07:15:16,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1034, PETRI_PLACES=105, PETRI_TRANSITIONS=143} [2023-08-27 07:15:16,441 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 36 predicate places. [2023-08-27 07:15:16,441 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 143 transitions, 1034 flow [2023-08-27 07:15:16,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:16,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:16,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:16,449 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 07:15:16,647 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,SelfDestructingSolverStorable16 [2023-08-27 07:15:16,648 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:16,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1743204267, now seen corresponding path program 1 times [2023-08-27 07:15:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:16,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773025185] [2023-08-27 07:15:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:17,159 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 07:15:17,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:17,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773025185] [2023-08-27 07:15:17,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773025185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:17,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953260873] [2023-08-27 07:15:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:17,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:17,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:17,163 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 07:15:17,165 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 07:15:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:17,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:15:17,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:17,486 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 07:15:17,504 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 07:15:17,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:17,562 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:15:17,562 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 07:15:17,610 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 07:15:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953260873] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:17,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:15:17,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 18 [2023-08-27 07:15:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052441978] [2023-08-27 07:15:17,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:17,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 07:15:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:17,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 07:15:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:15:17,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 640 [2023-08-27 07:15:17,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 143 transitions, 1034 flow. Second operand has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:17,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:17,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 640 [2023-08-27 07:15:17,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:21,938 INFO L124 PetriNetUnfolderBase]: 30406/41719 cut-off events. [2023-08-27 07:15:21,938 INFO L125 PetriNetUnfolderBase]: For 67023/67023 co-relation queries the response was YES. [2023-08-27 07:15:22,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146056 conditions, 41719 events. 30406/41719 cut-off events. For 67023/67023 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 229330 event pairs, 9152 based on Foata normal form. 0/25409 useless extension candidates. Maximal degree in co-relation 146015. Up to 30021 conditions per place. [2023-08-27 07:15:22,520 INFO L140 encePairwiseOnDemand]: 629/640 looper letters, 211 selfloop transitions, 15 changer transitions 1/227 dead transitions. [2023-08-27 07:15:22,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 227 transitions, 1975 flow [2023-08-27 07:15:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:15:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:15:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1484 transitions. [2023-08-27 07:15:22,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38645833333333335 [2023-08-27 07:15:22,523 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1484 transitions. [2023-08-27 07:15:22,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1484 transitions. [2023-08-27 07:15:22,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:22,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1484 transitions. [2023-08-27 07:15:22,525 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 07:15:22,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 640.0) internal successors, (4480), 7 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:22,529 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 640.0) internal successors, (4480), 7 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:22,529 INFO L175 Difference]: Start difference. First operand has 105 places, 143 transitions, 1034 flow. Second operand 6 states and 1484 transitions. [2023-08-27 07:15:22,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 227 transitions, 1975 flow [2023-08-27 07:15:22,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 227 transitions, 1962 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:22,663 INFO L231 Difference]: Finished difference. Result has 112 places, 152 transitions, 1133 flow [2023-08-27 07:15:22,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1133, PETRI_PLACES=112, PETRI_TRANSITIONS=152} [2023-08-27 07:15:22,663 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 43 predicate places. [2023-08-27 07:15:22,663 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 152 transitions, 1133 flow [2023-08-27 07:15:22,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:22,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:22,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:22,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-27 07:15:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 07:15:22,869 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:22,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1743204458, now seen corresponding path program 1 times [2023-08-27 07:15:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769005344] [2023-08-27 07:15:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:22,922 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 07:15:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:22,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769005344] [2023-08-27 07:15:22,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769005344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:22,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:22,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:15:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224348235] [2023-08-27 07:15:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:22,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:22,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:15:22,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 640 [2023-08-27 07:15:22,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 152 transitions, 1133 flow. Second operand has 3 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 07:15:22,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:22,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 640 [2023-08-27 07:15:22,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:27,836 INFO L124 PetriNetUnfolderBase]: 32628/45261 cut-off events. [2023-08-27 07:15:27,837 INFO L125 PetriNetUnfolderBase]: For 91452/91452 co-relation queries the response was YES. [2023-08-27 07:15:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168134 conditions, 45261 events. 32628/45261 cut-off events. For 91452/91452 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 260717 event pairs, 17522 based on Foata normal form. 0/29223 useless extension candidates. Maximal degree in co-relation 168089. Up to 37510 conditions per place. [2023-08-27 07:15:28,284 INFO L140 encePairwiseOnDemand]: 636/640 looper letters, 202 selfloop transitions, 6 changer transitions 0/208 dead transitions. [2023-08-27 07:15:28,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 208 transitions, 1972 flow [2023-08-27 07:15:28,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 844 transitions. [2023-08-27 07:15:28,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2023-08-27 07:15:28,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 844 transitions. [2023-08-27 07:15:28,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 844 transitions. [2023-08-27 07:15:28,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:28,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 844 transitions. [2023-08-27 07:15:28,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:28,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:28,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 640.0) internal successors, (2560), 4 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:28,289 INFO L175 Difference]: Start difference. First operand has 112 places, 152 transitions, 1133 flow. Second operand 3 states and 844 transitions. [2023-08-27 07:15:28,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 208 transitions, 1972 flow [2023-08-27 07:15:28,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 208 transitions, 1957 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:28,421 INFO L231 Difference]: Finished difference. Result has 113 places, 150 transitions, 1115 flow [2023-08-27 07:15:28,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1115, PETRI_PLACES=113, PETRI_TRANSITIONS=150} [2023-08-27 07:15:28,421 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 44 predicate places. [2023-08-27 07:15:28,421 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 150 transitions, 1115 flow [2023-08-27 07:15:28,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:15:28,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:28,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:28,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-27 07:15:28,422 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:28,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1755692094, now seen corresponding path program 1 times [2023-08-27 07:15:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:28,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283500173] [2023-08-27 07:15:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:28,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:28,707 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 07:15:28,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:28,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283500173] [2023-08-27 07:15:28,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283500173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:28,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696657821] [2023-08-27 07:15:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:28,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:28,709 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 07:15:28,720 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 07:15:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:28,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 07:15:28,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:28,979 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 07:15:28,989 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 07:15:28,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:29,036 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:15:29,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-08-27 07:15:29,073 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 07:15:29,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696657821] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:29,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:15:29,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 15 [2023-08-27 07:15:29,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211751156] [2023-08-27 07:15:29,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:29,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:15:29,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:29,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:15:29,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:15:29,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 640 [2023-08-27 07:15:29,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 150 transitions, 1115 flow. Second operand has 5 states, 5 states have (on average 232.8) internal successors, (1164), 5 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:29,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:29,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 640 [2023-08-27 07:15:29,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:34,134 INFO L124 PetriNetUnfolderBase]: 32660/45303 cut-off events. [2023-08-27 07:15:34,134 INFO L125 PetriNetUnfolderBase]: For 95305/95305 co-relation queries the response was YES. [2023-08-27 07:15:34,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169101 conditions, 45303 events. 32660/45303 cut-off events. For 95305/95305 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 261139 event pairs, 6193 based on Foata normal form. 0/29451 useless extension candidates. Maximal degree in co-relation 169056. Up to 30546 conditions per place. [2023-08-27 07:15:34,531 INFO L140 encePairwiseOnDemand]: 628/640 looper letters, 204 selfloop transitions, 18 changer transitions 1/223 dead transitions. [2023-08-27 07:15:34,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 223 transitions, 2046 flow [2023-08-27 07:15:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:15:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:15:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1253 transitions. [2023-08-27 07:15:34,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915625 [2023-08-27 07:15:34,534 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1253 transitions. [2023-08-27 07:15:34,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1253 transitions. [2023-08-27 07:15:34,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:34,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1253 transitions. [2023-08-27 07:15:34,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 640.0) internal successors, (3840), 6 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,539 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 640.0) internal successors, (3840), 6 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,539 INFO L175 Difference]: Start difference. First operand has 113 places, 150 transitions, 1115 flow. Second operand 5 states and 1253 transitions. [2023-08-27 07:15:34,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 223 transitions, 2046 flow [2023-08-27 07:15:34,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 223 transitions, 2037 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:34,678 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1222 flow [2023-08-27 07:15:34,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1222, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2023-08-27 07:15:34,679 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 49 predicate places. [2023-08-27 07:15:34,679 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1222 flow [2023-08-27 07:15:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.8) internal successors, (1164), 5 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:34,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:34,684 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 07:15:34,880 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 07:15:34,880 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:34,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1985405097, now seen corresponding path program 2 times [2023-08-27 07:15:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:34,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938625543] [2023-08-27 07:15:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:34,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:35,562 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 07:15:35,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:35,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938625543] [2023-08-27 07:15:35,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938625543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342190549] [2023-08-27 07:15:35,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:15:35,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:35,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:35,564 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 07:15:35,567 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 07:15:35,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:15:35,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:15:35,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 07:15:35,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:35,842 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 07:15:35,885 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 07:15:35,903 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 07:15:35,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:35,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342190549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:35,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:35,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-27 07:15:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068012365] [2023-08-27 07:15:35,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:35,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 07:15:35,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 07:15:35,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:15:35,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 640 [2023-08-27 07:15:35,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1222 flow. Second operand has 9 states, 9 states have (on average 220.55555555555554) internal successors, (1985), 9 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:35,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:35,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 640 [2023-08-27 07:15:35,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:40,749 INFO L124 PetriNetUnfolderBase]: 32747/45495 cut-off events. [2023-08-27 07:15:40,749 INFO L125 PetriNetUnfolderBase]: For 135712/135712 co-relation queries the response was YES. [2023-08-27 07:15:41,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188520 conditions, 45495 events. 32747/45495 cut-off events. For 135712/135712 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 261520 event pairs, 13683 based on Foata normal form. 50/31117 useless extension candidates. Maximal degree in co-relation 188472. Up to 44378 conditions per place. [2023-08-27 07:15:41,265 INFO L140 encePairwiseOnDemand]: 630/640 looper letters, 180 selfloop transitions, 24 changer transitions 1/205 dead transitions. [2023-08-27 07:15:41,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 205 transitions, 1841 flow [2023-08-27 07:15:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:15:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:15:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1854 transitions. [2023-08-27 07:15:41,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362109375 [2023-08-27 07:15:41,269 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1854 transitions. [2023-08-27 07:15:41,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1854 transitions. [2023-08-27 07:15:41,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:41,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1854 transitions. [2023-08-27 07:15:41,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.75) internal successors, (1854), 8 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:41,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 640.0) internal successors, (5760), 9 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:41,276 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 640.0) internal successors, (5760), 9 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:41,276 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1222 flow. Second operand 8 states and 1854 transitions. [2023-08-27 07:15:41,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 205 transitions, 1841 flow [2023-08-27 07:15:41,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 205 transitions, 1826 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:41,486 INFO L231 Difference]: Finished difference. Result has 126 places, 158 transitions, 1302 flow [2023-08-27 07:15:41,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1302, PETRI_PLACES=126, PETRI_TRANSITIONS=158} [2023-08-27 07:15:41,487 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 57 predicate places. [2023-08-27 07:15:41,487 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 158 transitions, 1302 flow [2023-08-27 07:15:41,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 220.55555555555554) internal successors, (1985), 9 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:41,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:41,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:41,493 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 07:15:41,691 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 07:15:41,691 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:41,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1250072695, now seen corresponding path program 1 times [2023-08-27 07:15:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:41,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090002135] [2023-08-27 07:15:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:41,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:42,245 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 07:15:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:42,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090002135] [2023-08-27 07:15:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090002135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:42,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691290334] [2023-08-27 07:15:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:42,249 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 07:15:42,252 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 07:15:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:42,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 07:15:42,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:42,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:42,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:42,453 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 07:15:42,453 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 07:15:42,498 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 07:15:42,571 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:15:42,571 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 07:15:42,620 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 07:15:42,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:42,689 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 07:15:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:42,755 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 07:15:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:42,915 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 07:15:42,962 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:15:42,963 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 07:15:42,987 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 07:15:42,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:43,435 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:15:43,435 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 07:15:43,450 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:15:43,451 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 2449 treesize of output 2385 [2023-08-27 07:15:43,478 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 276 [2023-08-27 07:15:43,491 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 276 treesize of output 252 [2023-08-27 07:15:43,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 122 [2023-08-27 07:15:43,520 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 246 treesize of output 198 [2023-08-27 07:15:43,978 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 07:15:43,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691290334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:15:43,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:15:43,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-08-27 07:15:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619485001] [2023-08-27 07:15:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:15:43,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 07:15:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 07:15:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=756, Unknown=21, NotChecked=0, Total=870 [2023-08-27 07:15:43,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 640 [2023-08-27 07:15:43,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 158 transitions, 1302 flow. Second operand has 30 states, 30 states have (on average 178.5) internal successors, (5355), 30 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:43,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:43,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 640 [2023-08-27 07:15:43,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:48,739 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 07:15:50,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:15:55,895 WARN L539 Checker$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 07:15:57,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:16:01,351 WARN L539 Checker$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 07:16:02,456 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (<= c_~n1~0 c_~q1_back~0)) (.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse2 (< c_~q1_back~0 0))) (and (forall ((v_ArrVal_829 (Array Int Int))) (< (+ |c_thread2Thread1of1ForFork1_~s~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_829) c_~q1~0.base) .cse0)) 2147483648)) (or .cse1 .cse2 (forall ((v_ArrVal_829 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_829) c_~q1~0.base) .cse0) 2147483648))) (or .cse1 (forall ((v_ArrVal_829 (Array Int Int)) (v_ArrVal_828 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_828) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_829) c_~q1~0.base) .cse0) 2147483648)) .cse2))) is different from false [2023-08-27 07:16:29,105 INFO L124 PetriNetUnfolderBase]: 139244/192928 cut-off events. [2023-08-27 07:16:29,105 INFO L125 PetriNetUnfolderBase]: For 650317/650317 co-relation queries the response was YES. [2023-08-27 07:16:30,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815447 conditions, 192928 events. 139244/192928 cut-off events. For 650317/650317 co-relation queries the response was YES. Maximal size of possible extension queue 4433. Compared 1332839 event pairs, 25619 based on Foata normal form. 1516/134586 useless extension candidates. Maximal degree in co-relation 815395. Up to 48288 conditions per place. [2023-08-27 07:16:31,266 INFO L140 encePairwiseOnDemand]: 614/640 looper letters, 914 selfloop transitions, 247 changer transitions 53/1214 dead transitions. [2023-08-27 07:16:31,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1214 transitions, 11705 flow [2023-08-27 07:16:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-27 07:16:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-27 07:16:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 9721 transitions. [2023-08-27 07:16:31,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2978247549019608 [2023-08-27 07:16:31,277 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 9721 transitions. [2023-08-27 07:16:31,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 9721 transitions. [2023-08-27 07:16:31,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:16:31,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 9721 transitions. [2023-08-27 07:16:31,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 190.6078431372549) internal successors, (9721), 51 states have internal predecessors, (9721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:31,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 640.0) internal successors, (33280), 52 states have internal predecessors, (33280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:31,311 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 640.0) internal successors, (33280), 52 states have internal predecessors, (33280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:31,311 INFO L175 Difference]: Start difference. First operand has 126 places, 158 transitions, 1302 flow. Second operand 51 states and 9721 transitions. [2023-08-27 07:16:31,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1214 transitions, 11705 flow [2023-08-27 07:16:43,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1214 transitions, 11642 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-27 07:16:43,034 INFO L231 Difference]: Finished difference. Result has 205 places, 414 transitions, 5578 flow [2023-08-27 07:16:43,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5578, PETRI_PLACES=205, PETRI_TRANSITIONS=414} [2023-08-27 07:16:43,034 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 136 predicate places. [2023-08-27 07:16:43,034 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 414 transitions, 5578 flow [2023-08-27 07:16:43,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 178.5) internal successors, (5355), 30 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:43,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:16:43,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:16:43,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 07:16:43,235 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 07:16:43,235 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:16:43,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:16:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1985405358, now seen corresponding path program 2 times [2023-08-27 07:16:43,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:16:43,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289434493] [2023-08-27 07:16:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:16:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:16:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:16:43,596 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 07:16:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:16:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289434493] [2023-08-27 07:16:43,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289434493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:16:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454680105] [2023-08-27 07:16:43,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:16:43,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:16:43,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:16:43,601 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 07:16:43,604 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 07:16:43,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:16:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:16:43,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:16:43,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:16:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:43,920 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 07:16:43,949 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 07:16:43,966 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 07:16:43,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:16:43,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454680105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:16:43,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:16:43,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 07:16:43,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671302268] [2023-08-27 07:16:43,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:16:43,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 07:16:43,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:16:43,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 07:16:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:16:43,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 640 [2023-08-27 07:16:43,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 414 transitions, 5578 flow. Second operand has 8 states, 8 states have (on average 221.75) internal successors, (1774), 8 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:43,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:16:43,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 640 [2023-08-27 07:16:43,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:17:26,422 INFO L124 PetriNetUnfolderBase]: 172779/242866 cut-off events. [2023-08-27 07:17:26,423 INFO L125 PetriNetUnfolderBase]: For 2241963/2241963 co-relation queries the response was YES. [2023-08-27 07:17:30,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309380 conditions, 242866 events. 172779/242866 cut-off events. For 2241963/2241963 co-relation queries the response was YES. Maximal size of possible extension queue 5864. Compared 1796353 event pairs, 30237 based on Foata normal form. 1617/186104 useless extension candidates. Maximal degree in co-relation 1309297. Up to 142217 conditions per place. [2023-08-27 07:17:31,827 INFO L140 encePairwiseOnDemand]: 630/640 looper letters, 559 selfloop transitions, 99 changer transitions 1/659 dead transitions. [2023-08-27 07:17:31,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 659 transitions, 10346 flow [2023-08-27 07:17:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:17:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:17:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1880 transitions. [2023-08-27 07:17:31,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2023-08-27 07:17:31,830 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1880 transitions. [2023-08-27 07:17:31,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1880 transitions. [2023-08-27 07:17:31,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:17:31,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1880 transitions. [2023-08-27 07:17:31,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:31,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 640.0) internal successors, (5760), 9 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:31,851 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 640.0) internal successors, (5760), 9 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:31,851 INFO L175 Difference]: Start difference. First operand has 205 places, 414 transitions, 5578 flow. Second operand 8 states and 1880 transitions. [2023-08-27 07:17:31,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 659 transitions, 10346 flow [2023-08-27 07:19:14,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 659 transitions, 9953 flow, removed 195 selfloop flow, removed 1 redundant places. [2023-08-27 07:19:14,458 INFO L231 Difference]: Finished difference. Result has 213 places, 447 transitions, 6321 flow [2023-08-27 07:19:14,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=640, PETRI_DIFFERENCE_MINUEND_FLOW=5347, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6321, PETRI_PLACES=213, PETRI_TRANSITIONS=447} [2023-08-27 07:19:14,458 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 144 predicate places. [2023-08-27 07:19:14,458 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 447 transitions, 6321 flow [2023-08-27 07:19:14,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 221.75) internal successors, (1774), 8 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:14,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:19:14,459 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-27 07:19:14,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-27 07:19:14,659 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 07:19:14,659 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:19:14,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:19:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash -158718084, now seen corresponding path program 1 times [2023-08-27 07:19:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:19:14,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443339277] [2023-08-27 07:19:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:14,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:19:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:14,853 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 07:19:14,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:19:14,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443339277] [2023-08-27 07:19:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443339277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:19:14,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741957115] [2023-08-27 07:19:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:14,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:19:14,854 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 07:19:14,861 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 07:19:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:15,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:19:15,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:19:15,051 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 07:19:15,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:19:15,297 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 07:19:15,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741957115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:19:15,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:19:15,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-27 07:19:15,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782015565] [2023-08-27 07:19:15,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:19:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:19:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:19:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:19:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:19:15,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 640 [2023-08-27 07:19:15,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 447 transitions, 6321 flow. Second operand has 25 states, 25 states have (on average 237.12) internal successors, (5928), 25 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:15,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:19:15,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 640 [2023-08-27 07:19:15,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:19:59,406 INFO L124 PetriNetUnfolderBase]: 172899/243106 cut-off events. [2023-08-27 07:19:59,407 INFO L125 PetriNetUnfolderBase]: For 2603761/2603761 co-relation queries the response was YES. [2023-08-27 07:20:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348213 conditions, 243106 events. 172899/243106 cut-off events. For 2603761/2603761 co-relation queries the response was YES. Maximal size of possible extension queue 6074. Compared 1797832 event pairs, 97440 based on Foata normal form. 72/184799 useless extension candidates. Maximal degree in co-relation 1348124. Up to 242797 conditions per place. [2023-08-27 07:20:04,571 INFO L140 encePairwiseOnDemand]: 632/640 looper letters, 364 selfloop transitions, 167 changer transitions 0/531 dead transitions. [2023-08-27 07:20:04,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 531 transitions, 8127 flow [2023-08-27 07:20:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 07:20:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 07:20:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5857 transitions. [2023-08-27 07:20:04,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38131510416666664 [2023-08-27 07:20:04,578 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5857 transitions. [2023-08-27 07:20:04,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5857 transitions. [2023-08-27 07:20:04,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:04,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5857 transitions. [2023-08-27 07:20:04,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 244.04166666666666) internal successors, (5857), 24 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:04,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 640.0) internal successors, (16000), 25 states have internal predecessors, (16000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:04,597 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 640.0) internal successors, (16000), 25 states have internal predecessors, (16000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:04,597 INFO L175 Difference]: Start difference. First operand has 213 places, 447 transitions, 6321 flow. Second operand 24 states and 5857 transitions. [2023-08-27 07:20:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 531 transitions, 8127 flow