/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.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:14:44,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:14:44,259 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 07:14:44,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:14:44,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:14:44,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:14:44,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:14:44,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:14:44,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:14:44,300 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:14:44,301 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:14:44,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:14:44,301 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:14:44,302 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:14:44,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:14:44,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:14:44,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:14:44,303 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:14:44,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:14:44,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:14:44,303 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:14:44,304 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:14:44,304 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:14:44,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:14:44,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:14:44,305 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:14:44,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:14:44,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:14:44,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:14:44,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:14:44,306 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:14:44,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:14:44,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:14:44,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:14:44,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:14:44,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:14:44,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:14:44,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:14:44,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:14:44,593 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:14:44,594 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:14:44,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-27 07:14:45,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:14:45,776 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:14:45,777 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-27 07:14:45,785 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4bb32d6b/c1095421f1e043a6bc3eff27983bf342/FLAG557db11a0 [2023-08-27 07:14:45,799 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4bb32d6b/c1095421f1e043a6bc3eff27983bf342 [2023-08-27 07:14:45,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:14:45,805 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:14:45,807 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:14:45,807 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:14:45,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:14:45,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:14:45" (1/1) ... [2023-08-27 07:14:45,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de37636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:45, skipping insertion in model container [2023-08-27 07:14:45,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:14:45" (1/1) ... [2023-08-27 07:14:45,840 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:14:46,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:14:46,014 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:14:46,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:14:46,057 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:14:46,057 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:14:46,062 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:14:46,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46 WrapperNode [2023-08-27 07:14:46,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:14:46,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:14:46,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:14:46,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:14:46,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,120 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 362 [2023-08-27 07:14:46,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:14:46,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:14:46,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:14:46,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:14:46,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,143 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:14:46,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:14:46,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:14:46,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:14:46,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (1/1) ... [2023-08-27 07:14:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:14:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:46,170 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 07:14:46,177 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 07:14:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:14:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:14:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:14:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:14:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:14:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:14:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:14:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:14:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 07:14:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 07:14:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:14:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:14:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:14:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 07:14:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:14:46,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:14:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:14:46,239 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 07:14:46,316 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:14:46,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:14:46,640 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:14:46,812 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:14:46,813 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-27 07:14:46,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:14:46 BoogieIcfgContainer [2023-08-27 07:14:46,838 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:14:46,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:14:46,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:14:46,842 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:14:46,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:14:45" (1/3) ... [2023-08-27 07:14:46,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6438ced3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:14:46, skipping insertion in model container [2023-08-27 07:14:46,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:14:46" (2/3) ... [2023-08-27 07:14:46,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6438ced3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:14:46, skipping insertion in model container [2023-08-27 07:14:46,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:14:46" (3/3) ... [2023-08-27 07:14:46,844 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-08-27 07:14:46,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:14:46,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-08-27 07:14:46,856 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:14:46,973 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 07:14:47,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 305 transitions, 634 flow [2023-08-27 07:14:47,141 INFO L124 PetriNetUnfolderBase]: 22/302 cut-off events. [2023-08-27 07:14:47,142 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:14:47,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 302 events. 22/302 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 359 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 253. Up to 3 conditions per place. [2023-08-27 07:14:47,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 305 transitions, 634 flow [2023-08-27 07:14:47,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 291 transitions, 600 flow [2023-08-27 07:14:47,159 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:14:47,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 279 places, 291 transitions, 600 flow [2023-08-27 07:14:47,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 279 places, 291 transitions, 600 flow [2023-08-27 07:14:47,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 291 transitions, 600 flow [2023-08-27 07:14:47,215 INFO L124 PetriNetUnfolderBase]: 22/291 cut-off events. [2023-08-27 07:14:47,215 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:14:47,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 291 events. 22/291 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 359 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 253. Up to 3 conditions per place. [2023-08-27 07:14:47,220 INFO L119 LiptonReduction]: Number of co-enabled transitions 5314 [2023-08-27 07:14:57,201 INFO L134 LiptonReduction]: Checked pairs total: 15388 [2023-08-27 07:14:57,202 INFO L136 LiptonReduction]: Total number of compositions: 307 [2023-08-27 07:14:57,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:14:57,235 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;@7ee6bd2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:14:57,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-08-27 07:14:57,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:14:57,239 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 07:14:57,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 07:14:57,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:57,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 07:14:57,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:57,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:57,243 INFO L85 PathProgramCache]: Analyzing trace with hash 45338, now seen corresponding path program 1 times [2023-08-27 07:14:57,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:57,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914797608] [2023-08-27 07:14:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:57,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:57,459 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 07:14:57,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:57,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914797608] [2023-08-27 07:14:57,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914797608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:57,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:57,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:14:57,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920647112] [2023-08-27 07:14:57,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:57,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:14:57,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 07:14:57,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:57,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:57,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 07:14:57,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:58,247 INFO L124 PetriNetUnfolderBase]: 6389/9066 cut-off events. [2023-08-27 07:14:58,248 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2023-08-27 07:14:58,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18492 conditions, 9066 events. 6389/9066 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 47351 event pairs, 5657 based on Foata normal form. 0/3750 useless extension candidates. Maximal degree in co-relation 17050. Up to 9062 conditions per place. [2023-08-27 07:14:58,286 INFO L140 encePairwiseOnDemand]: 590/612 looper letters, 55 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2023-08-27 07:14:58,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 266 flow [2023-08-27 07:14:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-08-27 07:14:58,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226579520697168 [2023-08-27 07:14:58,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-08-27 07:14:58,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-08-27 07:14:58,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:58,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-08-27 07:14:58,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:58,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:58,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:58,315 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 148 flow. Second operand 3 states and 776 transitions. [2023-08-27 07:14:58,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 266 flow [2023-08-27 07:14:58,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 254 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 07:14:58,330 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 182 flow [2023-08-27 07:14:58,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-08-27 07:14:58,334 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-27 07:14:58,334 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 182 flow [2023-08-27 07:14:58,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:58,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:58,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:14:58,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:14:58,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:58,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1406889, now seen corresponding path program 1 times [2023-08-27 07:14:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:58,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95404147] [2023-08-27 07:14:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:58,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:58,428 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 07:14:58,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:58,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95404147] [2023-08-27 07:14:58,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95404147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:14:58,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:14:58,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:14:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771522692] [2023-08-27 07:14:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:14:58,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:14:58,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:14:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:14:58,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 07:14:58,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:58,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:58,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 07:14:58,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:14:59,071 INFO L124 PetriNetUnfolderBase]: 6389/9063 cut-off events. [2023-08-27 07:14:59,071 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-27 07:14:59,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18275 conditions, 9063 events. 6389/9063 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 47349 event pairs, 5657 based on Foata normal form. 0/3754 useless extension candidates. Maximal degree in co-relation 18216. Up to 9050 conditions per place. [2023-08-27 07:14:59,105 INFO L140 encePairwiseOnDemand]: 607/612 looper letters, 56 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-27 07:14:59,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 288 flow [2023-08-27 07:14:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:14:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:14:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-08-27 07:14:59,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41122004357298475 [2023-08-27 07:14:59,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-08-27 07:14:59,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-08-27 07:14:59,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:14:59,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-08-27 07:14:59,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,111 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 182 flow. Second operand 3 states and 755 transitions. [2023-08-27 07:14:59,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 288 flow [2023-08-27 07:14:59,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:14:59,114 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 162 flow [2023-08-27 07:14:59,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-27 07:14:59,115 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -12 predicate places. [2023-08-27 07:14:59,115 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 162 flow [2023-08-27 07:14:59,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:14:59,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:14:59,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 07:14:59,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:14:59,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:14:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1406890, now seen corresponding path program 1 times [2023-08-27 07:14:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:14:59,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168211771] [2023-08-27 07:14:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:59,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:14:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:59,204 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 07:14:59,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:14:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168211771] [2023-08-27 07:14:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168211771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:14:59,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593942075] [2023-08-27 07:14:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:14:59,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:14:59,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:14:59,215 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 07:14:59,271 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 07:14:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:14:59,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:14:59,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:14:59,358 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 07:14:59,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:14:59,381 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 07:14:59,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593942075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:14:59,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:14:59,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 07:14:59,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434128655] [2023-08-27 07:14:59,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:14:59,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:14:59,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:14:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:14:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:14:59,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 07:14:59,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 234.14285714285714) internal successors, (1639), 7 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:14:59,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:14:59,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 07:14:59,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:00,049 INFO L124 PetriNetUnfolderBase]: 6398/9081 cut-off events. [2023-08-27 07:15:00,050 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-27 07:15:00,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18328 conditions, 9081 events. 6398/9081 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 47391 event pairs, 5657 based on Foata normal form. 0/3764 useless extension candidates. Maximal degree in co-relation 18216. Up to 9062 conditions per place. [2023-08-27 07:15:00,074 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 52 selfloop transitions, 25 changer transitions 0/77 dead transitions. [2023-08-27 07:15:00,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 394 flow [2023-08-27 07:15:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:15:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:15:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1484 transitions. [2023-08-27 07:15:00,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40413943355119825 [2023-08-27 07:15:00,077 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1484 transitions. [2023-08-27 07:15:00,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1484 transitions. [2023-08-27 07:15:00,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:00,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1484 transitions. [2023-08-27 07:15:00,080 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 07:15:00,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,085 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,085 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 162 flow. Second operand 6 states and 1484 transitions. [2023-08-27 07:15:00,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 394 flow [2023-08-27 07:15:00,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:00,086 INFO L231 Difference]: Finished difference. Result has 61 places, 77 transitions, 331 flow [2023-08-27 07:15:00,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=61, PETRI_TRANSITIONS=77} [2023-08-27 07:15:00,087 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -6 predicate places. [2023-08-27 07:15:00,087 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 77 transitions, 331 flow [2023-08-27 07:15:00,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 234.14285714285714) internal successors, (1639), 7 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:00,088 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 07:15:00,105 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 07:15:00,293 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 07:15:00,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:00,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1035641637, now seen corresponding path program 2 times [2023-08-27 07:15:00,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:00,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939439779] [2023-08-27 07:15:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:00,370 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 07:15:00,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939439779] [2023-08-27 07:15:00,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939439779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004743207] [2023-08-27 07:15:00,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:15:00,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:00,371 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 07:15:00,373 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 07:15:00,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:15:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:15:00,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:15:00,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:00,462 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 07:15:00,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:00,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004743207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:00,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:00,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 07:15:00,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958339644] [2023-08-27 07:15:00,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:00,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:00,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:15:00,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 612 [2023-08-27 07:15:00,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 77 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:00,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:00,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 612 [2023-08-27 07:15:00,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:01,020 INFO L124 PetriNetUnfolderBase]: 6398/9080 cut-off events. [2023-08-27 07:15:01,021 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-08-27 07:15:01,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18375 conditions, 9080 events. 6398/9080 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 47401 event pairs, 5657 based on Foata normal form. 1/3771 useless extension candidates. Maximal degree in co-relation 18287. Up to 9075 conditions per place. [2023-08-27 07:15:01,049 INFO L140 encePairwiseOnDemand]: 609/612 looper letters, 70 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-08-27 07:15:01,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 473 flow [2023-08-27 07:15:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-27 07:15:01,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144880174291939 [2023-08-27 07:15:01,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-27 07:15:01,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-27 07:15:01,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:01,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-27 07:15:01,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:01,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:01,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:01,056 INFO L175 Difference]: Start difference. First operand has 61 places, 77 transitions, 331 flow. Second operand 3 states and 761 transitions. [2023-08-27 07:15:01,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 473 flow [2023-08-27 07:15:01,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 436 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:01,057 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 296 flow [2023-08-27 07:15:01,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2023-08-27 07:15:01,058 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -6 predicate places. [2023-08-27 07:15:01,058 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 296 flow [2023-08-27 07:15:01,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:01,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:01,059 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 07:15:01,065 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 07:15:01,263 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 07:15:01,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:01,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1029509264, now seen corresponding path program 1 times [2023-08-27 07:15:01,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:01,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22258588] [2023-08-27 07:15:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:01,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:01,340 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 07:15:01,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22258588] [2023-08-27 07:15:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22258588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50961449] [2023-08-27 07:15:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:01,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:01,341 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 07:15:01,343 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 07:15:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:01,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 07:15:01,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:01,446 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 07:15:01,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:01,490 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 07:15:01,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50961449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:15:01,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:15:01,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 07:15:01,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109150638] [2023-08-27 07:15:01,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:15:01,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 07:15:01,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 07:15:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 07:15:01,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 07:15:01,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 296 flow. Second operand has 13 states, 13 states have (on average 234.15384615384616) internal successors, (3044), 13 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:01,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:01,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 07:15:01,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:02,204 INFO L124 PetriNetUnfolderBase]: 6416/9116 cut-off events. [2023-08-27 07:15:02,205 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-27 07:15:02,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18499 conditions, 9116 events. 6416/9116 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 47644 event pairs, 5657 based on Foata normal form. 12/3809 useless extension candidates. Maximal degree in co-relation 18396. Up to 9067 conditions per place. [2023-08-27 07:15:02,231 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 51 selfloop transitions, 61 changer transitions 0/112 dead transitions. [2023-08-27 07:15:02,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 736 flow [2023-08-27 07:15:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 07:15:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 07:15:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2920 transitions. [2023-08-27 07:15:02,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39760348583877997 [2023-08-27 07:15:02,236 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2920 transitions. [2023-08-27 07:15:02,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2920 transitions. [2023-08-27 07:15:02,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:02,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2920 transitions. [2023-08-27 07:15:02,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.33333333333334) internal successors, (2920), 12 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 612.0) internal successors, (7956), 13 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,247 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 612.0) internal successors, (7956), 13 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,248 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 296 flow. Second operand 12 states and 2920 transitions. [2023-08-27 07:15:02,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 736 flow [2023-08-27 07:15:02,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 712 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:02,250 INFO L231 Difference]: Finished difference. Result has 76 places, 112 transitions, 696 flow [2023-08-27 07:15:02,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=696, PETRI_PLACES=76, PETRI_TRANSITIONS=112} [2023-08-27 07:15:02,250 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-27 07:15:02,250 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 112 transitions, 696 flow [2023-08-27 07:15:02,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 234.15384615384616) internal successors, (3044), 13 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:02,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:02,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 07:15:02,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:02,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:02,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1006754435, now seen corresponding path program 1 times [2023-08-27 07:15:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:02,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60639901] [2023-08-27 07:15:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:02,520 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 07:15:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60639901] [2023-08-27 07:15:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60639901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:02,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:02,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:15:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439222091] [2023-08-27 07:15:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:02,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:15:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:15:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:15:02,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 07:15:02,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 112 transitions, 696 flow. Second operand has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:02,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:02,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 07:15:02,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:03,197 INFO L124 PetriNetUnfolderBase]: 6568/9385 cut-off events. [2023-08-27 07:15:03,197 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-27 07:15:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19318 conditions, 9385 events. 6568/9385 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 49424 event pairs, 5780 based on Foata normal form. 90/4105 useless extension candidates. Maximal degree in co-relation 19122. Up to 9115 conditions per place. [2023-08-27 07:15:03,227 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 172 selfloop transitions, 3 changer transitions 1/176 dead transitions. [2023-08-27 07:15:03,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 176 transitions, 1502 flow [2023-08-27 07:15:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:15:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:15:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 956 transitions. [2023-08-27 07:15:03,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39052287581699346 [2023-08-27 07:15:03,229 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 956 transitions. [2023-08-27 07:15:03,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 956 transitions. [2023-08-27 07:15:03,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:03,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 956 transitions. [2023-08-27 07:15:03,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,234 INFO L175 Difference]: Start difference. First operand has 76 places, 112 transitions, 696 flow. Second operand 4 states and 956 transitions. [2023-08-27 07:15:03,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 176 transitions, 1502 flow [2023-08-27 07:15:03,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 176 transitions, 1202 flow, removed 91 selfloop flow, removed 5 redundant places. [2023-08-27 07:15:03,238 INFO L231 Difference]: Finished difference. Result has 75 places, 112 transitions, 537 flow [2023-08-27 07:15:03,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=537, PETRI_PLACES=75, PETRI_TRANSITIONS=112} [2023-08-27 07:15:03,239 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-27 07:15:03,239 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 112 transitions, 537 flow [2023-08-27 07:15:03,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:03,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:03,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 07:15:03,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:03,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2080759730, now seen corresponding path program 1 times [2023-08-27 07:15:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:03,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428516332] [2023-08-27 07:15:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:03,303 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 07:15:03,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428516332] [2023-08-27 07:15:03,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428516332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14430897] [2023-08-27 07:15:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:03,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:03,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:03,318 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 07:15:03,349 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 07:15:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:03,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:15:03,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:03,431 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 07:15:03,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14430897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:03,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:03,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 07:15:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823539442] [2023-08-27 07:15:03,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:15:03,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 612 [2023-08-27 07:15:03,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 112 transitions, 537 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:03,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 612 [2023-08-27 07:15:03,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:03,916 INFO L124 PetriNetUnfolderBase]: 4958/7113 cut-off events. [2023-08-27 07:15:03,917 INFO L125 PetriNetUnfolderBase]: For 635/635 co-relation queries the response was YES. [2023-08-27 07:15:03,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15215 conditions, 7113 events. 4958/7113 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 35933 event pairs, 4296 based on Foata normal form. 0/3268 useless extension candidates. Maximal degree in co-relation 15055. Up to 7113 conditions per place. [2023-08-27 07:15:03,934 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 108 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-08-27 07:15:03,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 743 flow [2023-08-27 07:15:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 814 transitions. [2023-08-27 07:15:03,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433551198257081 [2023-08-27 07:15:03,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 814 transitions. [2023-08-27 07:15:03,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 814 transitions. [2023-08-27 07:15:03,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:03,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 814 transitions. [2023-08-27 07:15:03,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,941 INFO L175 Difference]: Start difference. First operand has 75 places, 112 transitions, 537 flow. Second operand 3 states and 814 transitions. [2023-08-27 07:15:03,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 743 flow [2023-08-27 07:15:03,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 737 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:03,943 INFO L231 Difference]: Finished difference. Result has 73 places, 109 transitions, 521 flow [2023-08-27 07:15:03,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=521, PETRI_PLACES=73, PETRI_TRANSITIONS=109} [2023-08-27 07:15:03,944 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2023-08-27 07:15:03,944 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 109 transitions, 521 flow [2023-08-27 07:15:03,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:03,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:03,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:03,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 07:15:04,149 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 07:15:04,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:04,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:04,150 INFO L85 PathProgramCache]: Analyzing trace with hash -79044560, now seen corresponding path program 1 times [2023-08-27 07:15:04,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:04,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242958251] [2023-08-27 07:15:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:04,185 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 07:15:04,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:04,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242958251] [2023-08-27 07:15:04,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242958251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:04,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:04,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:15:04,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728223159] [2023-08-27 07:15:04,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:04,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:04,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:04,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:15:04,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 612 [2023-08-27 07:15:04,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 109 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:04,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:04,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 612 [2023-08-27 07:15:04,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:04,963 INFO L124 PetriNetUnfolderBase]: 8266/11823 cut-off events. [2023-08-27 07:15:04,964 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2023-08-27 07:15:04,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25245 conditions, 11823 events. 8266/11823 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 67382 event pairs, 4212 based on Foata normal form. 0/5370 useless extension candidates. Maximal degree in co-relation 25225. Up to 6980 conditions per place. [2023-08-27 07:15:05,061 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 143 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2023-08-27 07:15:05,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 145 transitions, 894 flow [2023-08-27 07:15:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-27 07:15:05,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591503267973856 [2023-08-27 07:15:05,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-27 07:15:05,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-27 07:15:05,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:05,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-27 07:15:05,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:05,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:05,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:05,069 INFO L175 Difference]: Start difference. First operand has 73 places, 109 transitions, 521 flow. Second operand 3 states and 843 transitions. [2023-08-27 07:15:05,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 145 transitions, 894 flow [2023-08-27 07:15:05,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 145 transitions, 893 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:05,072 INFO L231 Difference]: Finished difference. Result has 75 places, 110 transitions, 534 flow [2023-08-27 07:15:05,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=534, PETRI_PLACES=75, PETRI_TRANSITIONS=110} [2023-08-27 07:15:05,074 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-27 07:15:05,074 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 110 transitions, 534 flow [2023-08-27 07:15:05,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:05,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:05,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 07:15:05,075 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:05,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash -79044865, now seen corresponding path program 1 times [2023-08-27 07:15:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:05,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949036450] [2023-08-27 07:15:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:05,167 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 07:15:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949036450] [2023-08-27 07:15:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949036450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:05,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:15:05,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410276788] [2023-08-27 07:15:05,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:05,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:05,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:15:05,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 612 [2023-08-27 07:15:05,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 110 transitions, 534 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:05,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:05,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 612 [2023-08-27 07:15:05,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:06,191 INFO L124 PetriNetUnfolderBase]: 8849/12568 cut-off events. [2023-08-27 07:15:06,192 INFO L125 PetriNetUnfolderBase]: For 2376/2376 co-relation queries the response was YES. [2023-08-27 07:15:06,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27968 conditions, 12568 events. 8849/12568 cut-off events. For 2376/2376 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 67487 event pairs, 2540 based on Foata normal form. 292/6181 useless extension candidates. Maximal degree in co-relation 27947. Up to 10134 conditions per place. [2023-08-27 07:15:06,237 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 131 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2023-08-27 07:15:06,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 136 transitions, 869 flow [2023-08-27 07:15:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 838 transitions. [2023-08-27 07:15:06,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564270152505447 [2023-08-27 07:15:06,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 838 transitions. [2023-08-27 07:15:06,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 838 transitions. [2023-08-27 07:15:06,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:06,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 838 transitions. [2023-08-27 07:15:06,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:06,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:06,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:06,243 INFO L175 Difference]: Start difference. First operand has 75 places, 110 transitions, 534 flow. Second operand 3 states and 838 transitions. [2023-08-27 07:15:06,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 136 transitions, 869 flow [2023-08-27 07:15:06,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 136 transitions, 866 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:06,248 INFO L231 Difference]: Finished difference. Result has 77 places, 114 transitions, 571 flow [2023-08-27 07:15:06,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=571, PETRI_PLACES=77, PETRI_TRANSITIONS=114} [2023-08-27 07:15:06,248 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 10 predicate places. [2023-08-27 07:15:06,249 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 114 transitions, 571 flow [2023-08-27 07:15:06,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:06,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:06,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:06,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 07:15:06,249 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:06,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1414771674, now seen corresponding path program 1 times [2023-08-27 07:15:06,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:06,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701877005] [2023-08-27 07:15:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:06,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:06,304 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 07:15:06,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701877005] [2023-08-27 07:15:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701877005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:06,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:15:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331201850] [2023-08-27 07:15:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:15:06,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 612 [2023-08-27 07:15:06,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 114 transitions, 571 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:06,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:06,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 612 [2023-08-27 07:15:06,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:07,048 INFO L124 PetriNetUnfolderBase]: 7283/10526 cut-off events. [2023-08-27 07:15:07,048 INFO L125 PetriNetUnfolderBase]: For 1486/1486 co-relation queries the response was YES. [2023-08-27 07:15:07,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25798 conditions, 10526 events. 7283/10526 cut-off events. For 1486/1486 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 57707 event pairs, 2126 based on Foata normal form. 68/4953 useless extension candidates. Maximal degree in co-relation 25775. Up to 9678 conditions per place. [2023-08-27 07:15:07,083 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 133 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-08-27 07:15:07,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 136 transitions, 913 flow [2023-08-27 07:15:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2023-08-27 07:15:07,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504357298474945 [2023-08-27 07:15:07,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2023-08-27 07:15:07,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2023-08-27 07:15:07,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:07,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2023-08-27 07:15:07,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,095 INFO L175 Difference]: Start difference. First operand has 77 places, 114 transitions, 571 flow. Second operand 3 states and 827 transitions. [2023-08-27 07:15:07,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 136 transitions, 913 flow [2023-08-27 07:15:07,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 136 transitions, 904 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:07,101 INFO L231 Difference]: Finished difference. Result has 79 places, 116 transitions, 589 flow [2023-08-27 07:15:07,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=589, PETRI_PLACES=79, PETRI_TRANSITIONS=116} [2023-08-27 07:15:07,101 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 12 predicate places. [2023-08-27 07:15:07,102 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 116 transitions, 589 flow [2023-08-27 07:15:07,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:07,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:07,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 07:15:07,102 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:07,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash 496559535, now seen corresponding path program 1 times [2023-08-27 07:15:07,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:07,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27975941] [2023-08-27 07:15:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:07,147 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 07:15:07,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:07,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27975941] [2023-08-27 07:15:07,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27975941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:07,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:07,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:15:07,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508883640] [2023-08-27 07:15:07,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:07,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:15:07,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:07,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:15:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:15:07,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 07:15:07,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 116 transitions, 589 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:07,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 07:15:07,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:07,950 INFO L124 PetriNetUnfolderBase]: 7775/11372 cut-off events. [2023-08-27 07:15:07,950 INFO L125 PetriNetUnfolderBase]: For 2652/2652 co-relation queries the response was YES. [2023-08-27 07:15:07,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28390 conditions, 11372 events. 7775/11372 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 63067 event pairs, 6057 based on Foata normal form. 72/5541 useless extension candidates. Maximal degree in co-relation 28365. Up to 10503 conditions per place. [2023-08-27 07:15:07,992 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 128 selfloop transitions, 13 changer transitions 0/141 dead transitions. [2023-08-27 07:15:07,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 141 transitions, 942 flow [2023-08-27 07:15:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:15:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:15:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 955 transitions. [2023-08-27 07:15:07,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901143790849673 [2023-08-27 07:15:07,994 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 955 transitions. [2023-08-27 07:15:07,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 955 transitions. [2023-08-27 07:15:07,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:07,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 955 transitions. [2023-08-27 07:15:07,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 238.75) internal successors, (955), 4 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:07,998 INFO L175 Difference]: Start difference. First operand has 79 places, 116 transitions, 589 flow. Second operand 4 states and 955 transitions. [2023-08-27 07:15:07,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 141 transitions, 942 flow [2023-08-27 07:15:08,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 141 transitions, 929 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:08,004 INFO L231 Difference]: Finished difference. Result has 82 places, 116 transitions, 621 flow [2023-08-27 07:15:08,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=621, PETRI_PLACES=82, PETRI_TRANSITIONS=116} [2023-08-27 07:15:08,005 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 15 predicate places. [2023-08-27 07:15:08,005 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 116 transitions, 621 flow [2023-08-27 07:15:08,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:08,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:08,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:08,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 07:15:08,005 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:08,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 496559420, now seen corresponding path program 1 times [2023-08-27 07:15:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132849174] [2023-08-27 07:15:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:08,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:08,056 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 07:15:08,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:08,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132849174] [2023-08-27 07:15:08,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132849174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:08,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:08,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:15:08,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487310542] [2023-08-27 07:15:08,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:08,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:08,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:15:08,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 612 [2023-08-27 07:15:08,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 116 transitions, 621 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:08,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:08,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 612 [2023-08-27 07:15:08,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:08,938 INFO L124 PetriNetUnfolderBase]: 6742/9931 cut-off events. [2023-08-27 07:15:08,938 INFO L125 PetriNetUnfolderBase]: For 1597/1597 co-relation queries the response was YES. [2023-08-27 07:15:08,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24927 conditions, 9931 events. 6742/9931 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 54588 event pairs, 2598 based on Foata normal form. 156/4976 useless extension candidates. Maximal degree in co-relation 24901. Up to 9157 conditions per place. [2023-08-27 07:15:08,988 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 125 selfloop transitions, 5 changer transitions 0/130 dead transitions. [2023-08-27 07:15:08,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 913 flow [2023-08-27 07:15:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2023-08-27 07:15:08,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466230936819172 [2023-08-27 07:15:08,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2023-08-27 07:15:08,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2023-08-27 07:15:08,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:08,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2023-08-27 07:15:08,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:08,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:08,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:08,994 INFO L175 Difference]: Start difference. First operand has 82 places, 116 transitions, 621 flow. Second operand 3 states and 820 transitions. [2023-08-27 07:15:08,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 913 flow [2023-08-27 07:15:09,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 899 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:09,001 INFO L231 Difference]: Finished difference. Result has 84 places, 120 transitions, 648 flow [2023-08-27 07:15:09,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=648, PETRI_PLACES=84, PETRI_TRANSITIONS=120} [2023-08-27 07:15:09,001 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 17 predicate places. [2023-08-27 07:15:09,002 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 120 transitions, 648 flow [2023-08-27 07:15:09,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:09,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:09,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:09,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 07:15:09,002 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:09,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1301076197, now seen corresponding path program 1 times [2023-08-27 07:15:09,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:09,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281125076] [2023-08-27 07:15:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:09,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:09,039 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 07:15:09,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:09,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281125076] [2023-08-27 07:15:09,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281125076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:09,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:09,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:15:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091830682] [2023-08-27 07:15:09,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:09,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:15:09,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:15:09,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:15:09,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 612 [2023-08-27 07:15:09,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 120 transitions, 648 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:09,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:09,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 612 [2023-08-27 07:15:09,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:09,987 INFO L124 PetriNetUnfolderBase]: 7135/10668 cut-off events. [2023-08-27 07:15:09,988 INFO L125 PetriNetUnfolderBase]: For 2702/2702 co-relation queries the response was YES. [2023-08-27 07:15:10,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30243 conditions, 10668 events. 7135/10668 cut-off events. For 2702/2702 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 61979 event pairs, 4662 based on Foata normal form. 0/5615 useless extension candidates. Maximal degree in co-relation 30215. Up to 9384 conditions per place. [2023-08-27 07:15:10,152 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 151 selfloop transitions, 3 changer transitions 0/154 dead transitions. [2023-08-27 07:15:10,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 154 transitions, 1095 flow [2023-08-27 07:15:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:15:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:15:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2023-08-27 07:15:10,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2023-08-27 07:15:10,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2023-08-27 07:15:10,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2023-08-27 07:15:10,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:10,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2023-08-27 07:15:10,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:10,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:10,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 612.0) internal successors, (2448), 4 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:10,158 INFO L175 Difference]: Start difference. First operand has 84 places, 120 transitions, 648 flow. Second operand 3 states and 834 transitions. [2023-08-27 07:15:10,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 154 transitions, 1095 flow [2023-08-27 07:15:10,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 154 transitions, 1091 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:10,164 INFO L231 Difference]: Finished difference. Result has 85 places, 119 transitions, 645 flow [2023-08-27 07:15:10,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=645, PETRI_PLACES=85, PETRI_TRANSITIONS=119} [2023-08-27 07:15:10,164 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 18 predicate places. [2023-08-27 07:15:10,164 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 119 transitions, 645 flow [2023-08-27 07:15:10,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:10,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:10,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:10,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 07:15:10,165 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:10,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1301076095, now seen corresponding path program 1 times [2023-08-27 07:15:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:10,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485505368] [2023-08-27 07:15:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:10,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:10,217 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 07:15:10,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:10,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485505368] [2023-08-27 07:15:10,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485505368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:10,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:15:10,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:15:10,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122304029] [2023-08-27 07:15:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:10,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:15:10,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:15:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:15:10,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 07:15:10,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 119 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:10,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:10,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 07:15:10,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:11,085 INFO L124 PetriNetUnfolderBase]: 7393/11170 cut-off events. [2023-08-27 07:15:11,085 INFO L125 PetriNetUnfolderBase]: For 3188/3188 co-relation queries the response was YES. [2023-08-27 07:15:11,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31727 conditions, 11170 events. 7393/11170 cut-off events. For 3188/3188 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 64813 event pairs, 5377 based on Foata normal form. 96/6213 useless extension candidates. Maximal degree in co-relation 31699. Up to 10656 conditions per place. [2023-08-27 07:15:11,180 INFO L140 encePairwiseOnDemand]: 601/612 looper letters, 117 selfloop transitions, 14 changer transitions 25/156 dead transitions. [2023-08-27 07:15:11,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 156 transitions, 1148 flow [2023-08-27 07:15:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:15:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:15:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1166 transitions. [2023-08-27 07:15:11,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810457516339869 [2023-08-27 07:15:11,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1166 transitions. [2023-08-27 07:15:11,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1166 transitions. [2023-08-27 07:15:11,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:11,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1166 transitions. [2023-08-27 07:15:11,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.2) internal successors, (1166), 5 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,187 INFO L175 Difference]: Start difference. First operand has 85 places, 119 transitions, 645 flow. Second operand 5 states and 1166 transitions. [2023-08-27 07:15:11,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 156 transitions, 1148 flow [2023-08-27 07:15:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 156 transitions, 1144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:11,198 INFO L231 Difference]: Finished difference. Result has 90 places, 120 transitions, 694 flow [2023-08-27 07:15:11,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=694, PETRI_PLACES=90, PETRI_TRANSITIONS=120} [2023-08-27 07:15:11,199 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2023-08-27 07:15:11,199 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 120 transitions, 694 flow [2023-08-27 07:15:11,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:11,199 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 07:15:11,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 07:15:11,199 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:11,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1781421232, now seen corresponding path program 2 times [2023-08-27 07:15:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:11,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883163495] [2023-08-27 07:15:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:11,337 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 07:15:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883163495] [2023-08-27 07:15:11,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883163495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230809990] [2023-08-27 07:15:11,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:15:11,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:11,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:11,339 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 07:15:11,341 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 07:15:11,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:15:11,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:15:11,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:15:11,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:11,462 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 07:15:11,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:11,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230809990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:11,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:11,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 07:15:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133581590] [2023-08-27 07:15:11,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:11,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:15:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:15:11,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:15:11,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 07:15:11,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 120 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:11,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:11,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 07:15:11,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:12,148 INFO L124 PetriNetUnfolderBase]: 5774/8719 cut-off events. [2023-08-27 07:15:12,148 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2023-08-27 07:15:12,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25890 conditions, 8719 events. 5774/8719 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 48447 event pairs, 3996 based on Foata normal form. 2/5031 useless extension candidates. Maximal degree in co-relation 25860. Up to 8674 conditions per place. [2023-08-27 07:15:12,188 INFO L140 encePairwiseOnDemand]: 607/612 looper letters, 105 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2023-08-27 07:15:12,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 898 flow [2023-08-27 07:15:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:15:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:15:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 981 transitions. [2023-08-27 07:15:12,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007352941176471 [2023-08-27 07:15:12,190 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 981 transitions. [2023-08-27 07:15:12,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 981 transitions. [2023-08-27 07:15:12,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:12,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 981 transitions. [2023-08-27 07:15:12,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:12,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:12,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:12,194 INFO L175 Difference]: Start difference. First operand has 90 places, 120 transitions, 694 flow. Second operand 4 states and 981 transitions. [2023-08-27 07:15:12,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 898 flow [2023-08-27 07:15:12,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 856 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:12,201 INFO L231 Difference]: Finished difference. Result has 88 places, 117 transitions, 646 flow [2023-08-27 07:15:12,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=646, PETRI_PLACES=88, PETRI_TRANSITIONS=117} [2023-08-27 07:15:12,201 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 21 predicate places. [2023-08-27 07:15:12,201 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 117 transitions, 646 flow [2023-08-27 07:15:12,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:12,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:12,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:12,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 07:15:12,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 07:15:12,406 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:12,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1041331456, now seen corresponding path program 1 times [2023-08-27 07:15:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:12,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186956704] [2023-08-27 07:15:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:12,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:12,703 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 07:15:12,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:12,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186956704] [2023-08-27 07:15:12,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186956704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:12,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482285220] [2023-08-27 07:15:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:12,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:12,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:12,705 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 07:15:12,706 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 07:15:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:12,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:15:12,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:12,858 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 07:15:12,866 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 07:15:12,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:12,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482285220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:12,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:12,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-27 07:15:12,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625524178] [2023-08-27 07:15:12,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:12,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:15:12,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:15:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-27 07:15:12,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 612 [2023-08-27 07:15:12,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 646 flow. Second operand has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:12,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:12,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 612 [2023-08-27 07:15:12,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:13,658 INFO L124 PetriNetUnfolderBase]: 6710/10172 cut-off events. [2023-08-27 07:15:13,659 INFO L125 PetriNetUnfolderBase]: For 3335/3335 co-relation queries the response was YES. [2023-08-27 07:15:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30176 conditions, 10172 events. 6710/10172 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 60446 event pairs, 1852 based on Foata normal form. 0/5979 useless extension candidates. Maximal degree in co-relation 30146. Up to 7379 conditions per place. [2023-08-27 07:15:13,706 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 155 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-08-27 07:15:13,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1145 flow [2023-08-27 07:15:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:15:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:15:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1251 transitions. [2023-08-27 07:15:13,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2023-08-27 07:15:13,709 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1251 transitions. [2023-08-27 07:15:13,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1251 transitions. [2023-08-27 07:15:13,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:13,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1251 transitions. [2023-08-27 07:15:13,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.2) internal successors, (1251), 5 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:13,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:13,714 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:13,714 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 646 flow. Second operand 5 states and 1251 transitions. [2023-08-27 07:15:13,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1145 flow [2023-08-27 07:15:13,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 163 transitions, 1132 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:13,725 INFO L231 Difference]: Finished difference. Result has 93 places, 122 transitions, 690 flow [2023-08-27 07:15:13,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=690, PETRI_PLACES=93, PETRI_TRANSITIONS=122} [2023-08-27 07:15:13,725 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 26 predicate places. [2023-08-27 07:15:13,725 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 122 transitions, 690 flow [2023-08-27 07:15:13,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:13,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:13,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:13,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 07:15:13,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 07:15:13,930 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:13,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:13,931 INFO L85 PathProgramCache]: Analyzing trace with hash 332286873, now seen corresponding path program 1 times [2023-08-27 07:15:13,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:13,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922583081] [2023-08-27 07:15:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:13,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:14,259 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 07:15:14,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:14,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922583081] [2023-08-27 07:15:14,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922583081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:14,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599003313] [2023-08-27 07:15:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:14,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:14,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:14,260 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 07:15:14,262 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 07:15:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:14,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 07:15:14,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:14,426 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 07:15:14,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 07:15:14,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:15:14,504 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:15:14,504 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 07:15:14,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:15:14,570 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:15:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:14,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 07:15:14,666 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 07:15:14,679 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 07:15:14,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:16,996 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:15:16,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-27 07:15:17,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1367 treesize of output 1287 [2023-08-27 07:15:17,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 81 [2023-08-27 07:15:17,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2023-08-27 07:15:17,041 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2023-08-27 07:15:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:15:17,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599003313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:15:17,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:15:17,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 07:15:17,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612338635] [2023-08-27 07:15:17,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:15:17,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:15:17,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:17,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:15:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=489, Unknown=17, NotChecked=0, Total=600 [2023-08-27 07:15:17,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 612 [2023-08-27 07:15:17,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 122 transitions, 690 flow. Second operand has 25 states, 25 states have (on average 179.68) internal successors, (4492), 25 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:17,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:17,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 612 [2023-08-27 07:15:17,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:23,422 WARN L234 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:15:26,389 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_~q1_back~0_138 Int) (v_ArrVal_586 (Array Int Int)) (v_ArrVal_587 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_586)) (.cse1 (+ c_~q1~0.offset (* v_~q1_back~0_138 4)))) (or (< v_~q1_back~0_138 0) (<= c_~n1~0 v_~q1_back~0_138) (< 2 (select (select .cse0 c_~q1~0.base) .cse1)) (< (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_587) c_~q1~0.base) .cse1) 2147483649)))) (forall ((v_ArrVal_587 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_587) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649))) is different from false [2023-08-27 07:15:30,115 INFO L124 PetriNetUnfolderBase]: 19517/29129 cut-off events. [2023-08-27 07:15:30,116 INFO L125 PetriNetUnfolderBase]: For 20859/20859 co-relation queries the response was YES. [2023-08-27 07:15:30,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91539 conditions, 29129 events. 19517/29129 cut-off events. For 20859/20859 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 196199 event pairs, 3067 based on Foata normal form. 628/18311 useless extension candidates. Maximal degree in co-relation 91506. Up to 8505 conditions per place. [2023-08-27 07:15:30,325 INFO L140 encePairwiseOnDemand]: 593/612 looper letters, 437 selfloop transitions, 115 changer transitions 1/553 dead transitions. [2023-08-27 07:15:30,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 553 transitions, 3824 flow [2023-08-27 07:15:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 07:15:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 07:15:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6645 transitions. [2023-08-27 07:15:30,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31022408963585435 [2023-08-27 07:15:30,337 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6645 transitions. [2023-08-27 07:15:30,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6645 transitions. [2023-08-27 07:15:30,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:30,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6645 transitions. [2023-08-27 07:15:30,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 189.85714285714286) internal successors, (6645), 35 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:30,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 612.0) internal successors, (22032), 36 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:30,367 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 612.0) internal successors, (22032), 36 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:30,367 INFO L175 Difference]: Start difference. First operand has 93 places, 122 transitions, 690 flow. Second operand 35 states and 6645 transitions. [2023-08-27 07:15:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 553 transitions, 3824 flow [2023-08-27 07:15:30,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 553 transitions, 3813 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:30,404 INFO L231 Difference]: Finished difference. Result has 144 places, 223 transitions, 1818 flow [2023-08-27 07:15:30,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1818, PETRI_PLACES=144, PETRI_TRANSITIONS=223} [2023-08-27 07:15:30,404 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 77 predicate places. [2023-08-27 07:15:30,404 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 223 transitions, 1818 flow [2023-08-27 07:15:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 179.68) internal successors, (4492), 25 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:30,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:30,405 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-27 07:15:30,427 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 07:15:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:30,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:30,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash -397355325, now seen corresponding path program 1 times [2023-08-27 07:15:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801681081] [2023-08-27 07:15:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:30,766 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 07:15:30,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:30,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801681081] [2023-08-27 07:15:30,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801681081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:30,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366907961] [2023-08-27 07:15:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:30,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:30,769 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 07:15:30,771 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 07:15:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:30,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:15:30,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:30,919 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 07:15:30,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:31,076 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 07:15:31,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366907961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:15:31,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:15:31,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-27 07:15:31,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725452094] [2023-08-27 07:15:31,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:15:31,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:15:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:15:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:15:31,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 612 [2023-08-27 07:15:31,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 223 transitions, 1818 flow. Second operand has 25 states, 25 states have (on average 234.12) internal successors, (5853), 25 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:31,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:31,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 612 [2023-08-27 07:15:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:34,344 INFO L124 PetriNetUnfolderBase]: 19621/29353 cut-off events. [2023-08-27 07:15:34,344 INFO L125 PetriNetUnfolderBase]: For 72260/72260 co-relation queries the response was YES. [2023-08-27 07:15:34,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115571 conditions, 29353 events. 19621/29353 cut-off events. For 72260/72260 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 195398 event pairs, 12226 based on Foata normal form. 72/18935 useless extension candidates. Maximal degree in co-relation 115519. Up to 29042 conditions per place. [2023-08-27 07:15:34,611 INFO L140 encePairwiseOnDemand]: 604/612 looper letters, 130 selfloop transitions, 189 changer transitions 0/319 dead transitions. [2023-08-27 07:15:34,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 319 transitions, 3188 flow [2023-08-27 07:15:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 07:15:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 07:15:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5782 transitions. [2023-08-27 07:15:34,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936546840958606 [2023-08-27 07:15:34,616 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5782 transitions. [2023-08-27 07:15:34,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5782 transitions. [2023-08-27 07:15:34,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:34,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5782 transitions. [2023-08-27 07:15:34,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 240.91666666666666) internal successors, (5782), 24 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 612.0) internal successors, (15300), 25 states have internal predecessors, (15300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,629 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 612.0) internal successors, (15300), 25 states have internal predecessors, (15300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,629 INFO L175 Difference]: Start difference. First operand has 144 places, 223 transitions, 1818 flow. Second operand 24 states and 5782 transitions. [2023-08-27 07:15:34,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 319 transitions, 3188 flow [2023-08-27 07:15:34,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 319 transitions, 3119 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:34,918 INFO L231 Difference]: Finished difference. Result has 178 places, 319 transitions, 3049 flow [2023-08-27 07:15:34,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3049, PETRI_PLACES=178, PETRI_TRANSITIONS=319} [2023-08-27 07:15:34,918 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 111 predicate places. [2023-08-27 07:15:34,919 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 319 transitions, 3049 flow [2023-08-27 07:15:34,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 234.12) internal successors, (5853), 25 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:34,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:34,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:34,926 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 07:15:35,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 07:15:35,124 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:35,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1039255941, now seen corresponding path program 1 times [2023-08-27 07:15:35,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:35,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960415399] [2023-08-27 07:15:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:35,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:35,391 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 07:15:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960415399] [2023-08-27 07:15:35,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960415399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602355696] [2023-08-27 07:15:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:35,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:35,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:35,392 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 07:15:35,394 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 07:15:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:35,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:15:35,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:35,630 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 07:15:35,643 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 07:15:35,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:35,673 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:15:35,673 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 17 [2023-08-27 07:15:35,729 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 07:15:35,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602355696] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:35,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:15:35,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 18 [2023-08-27 07:15:35,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910248805] [2023-08-27 07:15:35,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 07:15:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 07:15:35,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:15:35,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 612 [2023-08-27 07:15:35,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 319 transitions, 3049 flow. Second operand has 6 states, 6 states have (on average 230.33333333333334) internal successors, (1382), 6 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:35,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:35,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 612 [2023-08-27 07:15:35,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:39,888 INFO L124 PetriNetUnfolderBase]: 19929/29925 cut-off events. [2023-08-27 07:15:39,888 INFO L125 PetriNetUnfolderBase]: For 68761/68761 co-relation queries the response was YES. [2023-08-27 07:15:40,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116722 conditions, 29925 events. 19929/29925 cut-off events. For 68761/68761 co-relation queries the response was YES. Maximal size of possible extension queue 1542. Compared 201406 event pairs, 7007 based on Foata normal form. 64/19499 useless extension candidates. Maximal degree in co-relation 116657. Up to 22167 conditions per place. [2023-08-27 07:15:40,194 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 355 selfloop transitions, 35 changer transitions 0/390 dead transitions. [2023-08-27 07:15:40,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 390 transitions, 4255 flow [2023-08-27 07:15:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:15:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:15:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1464 transitions. [2023-08-27 07:15:40,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39869281045751637 [2023-08-27 07:15:40,196 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1464 transitions. [2023-08-27 07:15:40,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1464 transitions. [2023-08-27 07:15:40,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:40,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1464 transitions. [2023-08-27 07:15:40,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 244.0) internal successors, (1464), 6 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:40,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:40,200 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:40,200 INFO L175 Difference]: Start difference. First operand has 178 places, 319 transitions, 3049 flow. Second operand 6 states and 1464 transitions. [2023-08-27 07:15:40,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 390 transitions, 4255 flow [2023-08-27 07:15:40,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 390 transitions, 3747 flow, removed 125 selfloop flow, removed 11 redundant places. [2023-08-27 07:15:40,519 INFO L231 Difference]: Finished difference. Result has 176 places, 336 transitions, 2860 flow [2023-08-27 07:15:40,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2860, PETRI_PLACES=176, PETRI_TRANSITIONS=336} [2023-08-27 07:15:40,519 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 109 predicate places. [2023-08-27 07:15:40,519 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 336 transitions, 2860 flow [2023-08-27 07:15:40,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 230.33333333333334) internal successors, (1382), 6 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:40,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:40,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:40,525 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 07:15:40,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:40,725 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:40,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash 557727317, now seen corresponding path program 1 times [2023-08-27 07:15:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:40,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982145676] [2023-08-27 07:15:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:40,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:41,208 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 07:15:41,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982145676] [2023-08-27 07:15:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982145676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238518898] [2023-08-27 07:15:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:41,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:41,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:41,211 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 07:15:41,213 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 07:15:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:41,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 07:15:41,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:41,434 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 07:15:41,453 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 07:15:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:15:41,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:15:41,500 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_776 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_776) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-27 07:15:41,506 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:15:41,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-27 07:15:41,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-27 07:15:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:15:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238518898] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:41,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:15:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-08-27 07:15:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753082380] [2023-08-27 07:15:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 07:15:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 07:15:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=395, Unknown=1, NotChecked=40, Total=506 [2023-08-27 07:15:41,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 612 [2023-08-27 07:15:41,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 336 transitions, 2860 flow. Second operand has 8 states, 8 states have (on average 220.75) internal successors, (1766), 8 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:41,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:41,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 612 [2023-08-27 07:15:41,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:45,712 INFO L124 PetriNetUnfolderBase]: 20025/30071 cut-off events. [2023-08-27 07:15:45,712 INFO L125 PetriNetUnfolderBase]: For 76125/76125 co-relation queries the response was YES. [2023-08-27 07:15:46,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122280 conditions, 30071 events. 20025/30071 cut-off events. For 76125/76125 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 203280 event pairs, 5175 based on Foata normal form. 108/20725 useless extension candidates. Maximal degree in co-relation 122211. Up to 21352 conditions per place. [2023-08-27 07:15:46,139 INFO L140 encePairwiseOnDemand]: 600/612 looper letters, 294 selfloop transitions, 93 changer transitions 0/387 dead transitions. [2023-08-27 07:15:46,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 387 transitions, 3931 flow [2023-08-27 07:15:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:15:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:15:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1624 transitions. [2023-08-27 07:15:46,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790849673202614 [2023-08-27 07:15:46,141 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1624 transitions. [2023-08-27 07:15:46,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1624 transitions. [2023-08-27 07:15:46,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:46,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1624 transitions. [2023-08-27 07:15:46,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 232.0) internal successors, (1624), 7 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:46,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 612.0) internal successors, (4896), 8 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:46,145 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 612.0) internal successors, (4896), 8 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:46,145 INFO L175 Difference]: Start difference. First operand has 176 places, 336 transitions, 2860 flow. Second operand 7 states and 1624 transitions. [2023-08-27 07:15:46,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 387 transitions, 3931 flow [2023-08-27 07:15:46,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 387 transitions, 3916 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:46,746 INFO L231 Difference]: Finished difference. Result has 184 places, 341 transitions, 3247 flow [2023-08-27 07:15:46,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3247, PETRI_PLACES=184, PETRI_TRANSITIONS=341} [2023-08-27 07:15:46,752 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 117 predicate places. [2023-08-27 07:15:46,752 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 341 transitions, 3247 flow [2023-08-27 07:15:46,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 220.75) internal successors, (1766), 8 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:46,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:46,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:46,760 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 07:15:46,957 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 07:15:46,957 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:46,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1041331701, now seen corresponding path program 2 times [2023-08-27 07:15:46,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:46,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829294180] [2023-08-27 07:15:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:46,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:47,268 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 07:15:47,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829294180] [2023-08-27 07:15:47,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829294180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991287294] [2023-08-27 07:15:47,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:15:47,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:47,285 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 07:15:47,343 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 07:15:47,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:15:47,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:15:47,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:15:47,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:47,545 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 07:15:47,562 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 07:15:47,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:47,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991287294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:47,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:47,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-27 07:15:47,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977241621] [2023-08-27 07:15:47,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:47,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 07:15:47,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 07:15:47,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-27 07:15:47,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 612 [2023-08-27 07:15:47,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 341 transitions, 3247 flow. Second operand has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:47,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:47,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 612 [2023-08-27 07:15:47,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:51,908 INFO L124 PetriNetUnfolderBase]: 19629/29493 cut-off events. [2023-08-27 07:15:51,908 INFO L125 PetriNetUnfolderBase]: For 149448/149448 co-relation queries the response was YES. [2023-08-27 07:15:52,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135124 conditions, 29493 events. 19629/29493 cut-off events. For 149448/149448 co-relation queries the response was YES. Maximal size of possible extension queue 1449. Compared 196496 event pairs, 8349 based on Foata normal form. 96/20497 useless extension candidates. Maximal degree in co-relation 135051. Up to 27301 conditions per place. [2023-08-27 07:15:52,166 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 355 selfloop transitions, 38 changer transitions 0/393 dead transitions. [2023-08-27 07:15:52,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 393 transitions, 4372 flow [2023-08-27 07:15:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:15:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:15:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1479 transitions. [2023-08-27 07:15:52,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2023-08-27 07:15:52,168 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1479 transitions. [2023-08-27 07:15:52,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1479 transitions. [2023-08-27 07:15:52,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:52,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1479 transitions. [2023-08-27 07:15:52,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 246.5) internal successors, (1479), 6 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:52,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:52,189 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:52,189 INFO L175 Difference]: Start difference. First operand has 184 places, 341 transitions, 3247 flow. Second operand 6 states and 1479 transitions. [2023-08-27 07:15:52,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 393 transitions, 4372 flow [2023-08-27 07:15:52,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 393 transitions, 4321 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-27 07:15:52,737 INFO L231 Difference]: Finished difference. Result has 190 places, 353 transitions, 3505 flow [2023-08-27 07:15:52,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3505, PETRI_PLACES=190, PETRI_TRANSITIONS=353} [2023-08-27 07:15:52,738 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 123 predicate places. [2023-08-27 07:15:52,738 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 353 transitions, 3505 flow [2023-08-27 07:15:52,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:52,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:52,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:52,745 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 07:15:52,943 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 07:15:52,943 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:52,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash 332287117, now seen corresponding path program 3 times [2023-08-27 07:15:52,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:52,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262610456] [2023-08-27 07:15:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:53,390 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 07:15:53,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:53,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262610456] [2023-08-27 07:15:53,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262610456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:53,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346063963] [2023-08-27 07:15:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:15:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:53,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:53,402 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 07:15:53,438 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 07:15:53,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 07:15:53,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:15:53,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:15:53,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:15:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:15:53,643 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 07:15:53,689 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 07:15:53,704 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 07:15:53,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:15:53,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346063963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:15:53,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:15:53,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-08-27 07:15:53,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549906626] [2023-08-27 07:15:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:15:53,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 07:15:53,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:15:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 07:15:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:15:53,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 07:15:53,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 353 transitions, 3505 flow. Second operand has 9 states, 9 states have (on average 219.55555555555554) internal successors, (1976), 9 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:53,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:15:53,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 07:15:53,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:15:58,133 INFO L124 PetriNetUnfolderBase]: 19644/29646 cut-off events. [2023-08-27 07:15:58,133 INFO L125 PetriNetUnfolderBase]: For 144035/144035 co-relation queries the response was YES. [2023-08-27 07:15:58,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134847 conditions, 29646 events. 19644/29646 cut-off events. For 144035/144035 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 199698 event pairs, 8454 based on Foata normal form. 112/20586 useless extension candidates. Maximal degree in co-relation 134771. Up to 26228 conditions per place. [2023-08-27 07:15:58,644 INFO L140 encePairwiseOnDemand]: 602/612 looper letters, 330 selfloop transitions, 72 changer transitions 0/402 dead transitions. [2023-08-27 07:15:58,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 402 transitions, 4528 flow [2023-08-27 07:15:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:15:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:15:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1844 transitions. [2023-08-27 07:15:58,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37663398692810457 [2023-08-27 07:15:58,647 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1844 transitions. [2023-08-27 07:15:58,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1844 transitions. [2023-08-27 07:15:58,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:15:58,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1844 transitions. [2023-08-27 07:15:58,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 230.5) internal successors, (1844), 8 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:58,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:58,653 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:58,653 INFO L175 Difference]: Start difference. First operand has 190 places, 353 transitions, 3505 flow. Second operand 8 states and 1844 transitions. [2023-08-27 07:15:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 402 transitions, 4528 flow [2023-08-27 07:15:59,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 402 transitions, 4489 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-27 07:15:59,249 INFO L231 Difference]: Finished difference. Result has 198 places, 356 transitions, 3687 flow [2023-08-27 07:15:59,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=198, PETRI_TRANSITIONS=356} [2023-08-27 07:15:59,251 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 131 predicate places. [2023-08-27 07:15:59,251 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 356 transitions, 3687 flow [2023-08-27 07:15:59,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 219.55555555555554) internal successors, (1976), 9 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:15:59,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:15:59,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:15:59,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-27 07:15:59,455 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 07:15:59,456 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:15:59,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:15:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2138311009, now seen corresponding path program 1 times [2023-08-27 07:15:59,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:15:59,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520799299] [2023-08-27 07:15:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:59,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:15:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:59,812 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 07:15:59,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:15:59,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520799299] [2023-08-27 07:15:59,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520799299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:15:59,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821157015] [2023-08-27 07:15:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:15:59,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:15:59,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:15:59,813 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 07:15:59,860 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 07:15:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:15:59,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 07:16:00,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:16:00,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:00,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:00,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:00,036 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 07:16:00,037 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 07:16:00,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:16:00,122 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:16:00,122 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 07:16:00,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:16:00,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:16:00,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:16:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:00,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 07:16:00,310 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 07:16:00,322 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 07:16:00,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:16:00,825 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:16:00,826 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 68 treesize of output 56 [2023-08-27 07:16:00,831 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 5491 treesize of output 5331 [2023-08-27 07:16:00,876 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 207 treesize of output 195 [2023-08-27 07:16:00,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 234 [2023-08-27 07:16:00,901 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 363 treesize of output 315 [2023-08-27 07:16:00,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 145 [2023-08-27 07:16:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:16:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821157015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:16:01,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:16:01,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 07:16:01,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381541046] [2023-08-27 07:16:01,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:16:01,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 07:16:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:16:01,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 07:16:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=581, Unknown=12, NotChecked=0, Total=702 [2023-08-27 07:16:01,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 612 [2023-08-27 07:16:01,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 356 transitions, 3687 flow. Second operand has 27 states, 27 states have (on average 178.66666666666666) internal successors, (4824), 27 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:01,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:16:01,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 612 [2023-08-27 07:16:01,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:16:01,613 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (<= c_~n1~0 c_~q1_back~0)) (.cse4 (< c_~q1_back~0 0)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse5 (+ (* c_~q1_back~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_946 (Array Int Int)) (v_ArrVal_945 (Array Int Int)) (v_ArrVal_947 (Array Int Int)) (v_~q1_back~0_146 Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_945) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_946)) (.cse1 (+ (* v_~q1_back~0_146 4) c_~q1~0.offset))) (or (< 0 (select (select .cse0 c_~q1~0.base) .cse1)) (< v_~q1_back~0_146 0) (< (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_947) c_~q1~0.base) .cse1) 2147483649) (<= c_~n1~0 v_~q1_back~0_146)))) (or .cse2 (forall ((v_ArrVal_947 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_947) c_~q1~0.base) .cse3) 2147483649)) .cse4 (< 0 (select (select |c_#memory_int| c_~q1~0.base) .cse5))) (or .cse2 .cse4 (forall ((v_ArrVal_946 (Array Int Int)) (v_ArrVal_947 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_946))) (or (< (select (select (store .cse6 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_947) c_~q1~0.base) .cse3) 2147483649) (< 0 (select (select .cse6 c_~q1~0.base) .cse5)))))))) is different from false [2023-08-27 07:16:07,228 INFO L124 PetriNetUnfolderBase]: 18153/27438 cut-off events. [2023-08-27 07:16:07,228 INFO L125 PetriNetUnfolderBase]: For 115510/115510 co-relation queries the response was YES. [2023-08-27 07:16:07,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125109 conditions, 27438 events. 18153/27438 cut-off events. For 115510/115510 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 186018 event pairs, 3623 based on Foata normal form. 175/18997 useless extension candidates. Maximal degree in co-relation 125030. Up to 7774 conditions per place. [2023-08-27 07:16:07,657 INFO L140 encePairwiseOnDemand]: 593/612 looper letters, 531 selfloop transitions, 166 changer transitions 3/700 dead transitions. [2023-08-27 07:16:07,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 700 transitions, 7190 flow [2023-08-27 07:16:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 07:16:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 07:16:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6212 transitions. [2023-08-27 07:16:07,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.307585660526837 [2023-08-27 07:16:07,664 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6212 transitions. [2023-08-27 07:16:07,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6212 transitions. [2023-08-27 07:16:07,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:16:07,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6212 transitions. [2023-08-27 07:16:07,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 188.24242424242425) internal successors, (6212), 33 states have internal predecessors, (6212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:07,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 612.0) internal successors, (20808), 34 states have internal predecessors, (20808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:07,683 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 612.0) internal successors, (20808), 34 states have internal predecessors, (20808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:07,683 INFO L175 Difference]: Start difference. First operand has 198 places, 356 transitions, 3687 flow. Second operand 33 states and 6212 transitions. [2023-08-27 07:16:07,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 700 transitions, 7190 flow [2023-08-27 07:16:08,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 700 transitions, 7063 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-27 07:16:08,289 INFO L231 Difference]: Finished difference. Result has 233 places, 374 transitions, 4357 flow [2023-08-27 07:16:08,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=3559, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4357, PETRI_PLACES=233, PETRI_TRANSITIONS=374} [2023-08-27 07:16:08,290 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 166 predicate places. [2023-08-27 07:16:08,290 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 374 transitions, 4357 flow [2023-08-27 07:16:08,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 178.66666666666666) internal successors, (4824), 27 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:08,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:16:08,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:16:08,295 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 07:16:08,495 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 07:16:08,496 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:16:08,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:16:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2142660496, now seen corresponding path program 1 times [2023-08-27 07:16:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:16:08,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880793585] [2023-08-27 07:16:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:16:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:16:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:16:08,919 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 07:16:08,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:16:08,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880793585] [2023-08-27 07:16:08,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880793585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:16:08,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460438755] [2023-08-27 07:16:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:16:08,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:16:08,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:16:08,920 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 07:16:08,923 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 07:16:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:16:09,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 07:16:09,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:16:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:09,096 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 07:16:09,097 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 07:16:09,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:16:09,177 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:16:09,177 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 07:16:09,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:16:09,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:16:09,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:16:09,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:09,328 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 07:16:09,349 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 07:16:09,363 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 07:16:09,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:16:09,595 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_~q1_back~0_148 Int) (v_ArrVal_1013 (Array Int Int)) (v_ArrVal_1012 (Array Int Int)) (v_ArrVal_1011 (Array Int Int)) (v_ArrVal_1010 (Array Int Int))) (let ((.cse0 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_1010) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1011) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1012)) (.cse1 (+ c_~q1~0.offset (* v_~q1_back~0_148 4)))) (or (< v_~q1_back~0_148 0) (<= c_~n1~0 v_~q1_back~0_148) (< 0 (+ 2147483648 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013) c_~q1~0.base) .cse1))) (< (select (select .cse0 c_~q1~0.base) .cse1) 2)))) is different from false [2023-08-27 07:16:09,662 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:16:09,663 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-08-27 07:16:09,668 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 1947 treesize of output 1883 [2023-08-27 07:16:09,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 272 [2023-08-27 07:16:09,707 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 187 [2023-08-27 07:16:09,715 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 395 treesize of output 347 [2023-08-27 07:16:09,725 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 185 treesize of output 161 [2023-08-27 07:16:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-27 07:16:09,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460438755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:16:09,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:16:09,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 07:16:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873409084] [2023-08-27 07:16:09,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:16:09,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 07:16:09,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:16:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 07:16:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=549, Unknown=11, NotChecked=48, Total=702 [2023-08-27 07:16:09,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 612 [2023-08-27 07:16:09,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 374 transitions, 4357 flow. Second operand has 27 states, 27 states have (on average 178.66666666666666) internal successors, (4824), 27 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:09,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:16:09,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 612 [2023-08-27 07:16:09,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:16:16,044 INFO L124 PetriNetUnfolderBase]: 18740/28290 cut-off events. [2023-08-27 07:16:16,044 INFO L125 PetriNetUnfolderBase]: For 161578/161578 co-relation queries the response was YES. [2023-08-27 07:16:16,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140442 conditions, 28290 events. 18740/28290 cut-off events. For 161578/161578 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 193137 event pairs, 3032 based on Foata normal form. 25/19693 useless extension candidates. Maximal degree in co-relation 140356. Up to 7884 conditions per place. [2023-08-27 07:16:16,269 INFO L140 encePairwiseOnDemand]: 593/612 looper letters, 633 selfloop transitions, 184 changer transitions 33/850 dead transitions. [2023-08-27 07:16:16,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 850 transitions, 9169 flow [2023-08-27 07:16:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 07:16:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 07:16:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 7144 transitions. [2023-08-27 07:16:16,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30718954248366015 [2023-08-27 07:16:16,275 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 7144 transitions. [2023-08-27 07:16:16,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 7144 transitions. [2023-08-27 07:16:16,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:16:16,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 7144 transitions. [2023-08-27 07:16:16,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 188.0) internal successors, (7144), 38 states have internal predecessors, (7144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:16,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 612.0) internal successors, (23868), 39 states have internal predecessors, (23868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:16,291 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 612.0) internal successors, (23868), 39 states have internal predecessors, (23868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:16,291 INFO L175 Difference]: Start difference. First operand has 233 places, 374 transitions, 4357 flow. Second operand 38 states and 7144 transitions. [2023-08-27 07:16:16,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 850 transitions, 9169 flow [2023-08-27 07:16:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 850 transitions, 8940 flow, removed 28 selfloop flow, removed 16 redundant places. [2023-08-27 07:16:17,050 INFO L231 Difference]: Finished difference. Result has 259 places, 420 transitions, 5336 flow [2023-08-27 07:16:17,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5336, PETRI_PLACES=259, PETRI_TRANSITIONS=420} [2023-08-27 07:16:17,051 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 192 predicate places. [2023-08-27 07:16:17,051 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 420 transitions, 5336 flow [2023-08-27 07:16:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 178.66666666666666) internal successors, (4824), 27 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:17,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:16:17,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:16:17,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 07:16:17,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:16:17,256 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:16:17,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:16:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2078311691, now seen corresponding path program 1 times [2023-08-27 07:16:17,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:16:17,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073302995] [2023-08-27 07:16:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:16:17,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:16:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:16:17,543 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 07:16:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:16:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073302995] [2023-08-27 07:16:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073302995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:16:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140029417] [2023-08-27 07:16:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:16:17,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:16:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:16:17,557 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:16:17,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 07:16:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:16:17,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 07:16:17,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:16:17,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:17,731 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 07:16:17,731 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 07:16:17,769 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 07:16:17,829 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:16:17,829 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 07:16:17,861 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 07:16:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:17,905 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 07:16:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:17,949 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 07:16:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:18,129 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 07:16:18,178 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:16:18,178 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 07:16:18,204 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 07:16:18,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:16:18,267 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1079 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1079) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) |c_thread2Thread1of1ForFork0_~s~0#1|) 2147483648)) is different from false [2023-08-27 07:16:18,270 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1079 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1079) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648)) is different from false [2023-08-27 07:16:18,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:16:18,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-08-27 07:16:18,567 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:16:18,568 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 9793 treesize of output 9537 [2023-08-27 07:16:18,585 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 135 [2023-08-27 07:16:18,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 111 [2023-08-27 07:16:18,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 99 [2023-08-27 07:16:18,606 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 98 [2023-08-27 07:16:18,804 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 07:16:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140029417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:16:18,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:16:18,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-08-27 07:16:18,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254425085] [2023-08-27 07:16:18,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:16:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 07:16:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:16:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 07:16:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=663, Unknown=14, NotChecked=106, Total=870 [2023-08-27 07:16:18,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 612 [2023-08-27 07:16:18,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 420 transitions, 5336 flow. Second operand has 30 states, 30 states have (on average 177.5) internal successors, (5325), 30 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:18,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:16:18,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 612 [2023-08-27 07:16:18,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:16:22,214 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 07:16:24,252 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 07:16:24,824 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1079 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1079) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648)))) (and (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) .cse0) .cse0)) is different from false [2023-08-27 07:16:31,813 INFO L124 PetriNetUnfolderBase]: 20898/31617 cut-off events. [2023-08-27 07:16:31,813 INFO L125 PetriNetUnfolderBase]: For 261932/261932 co-relation queries the response was YES. [2023-08-27 07:16:32,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164055 conditions, 31617 events. 20898/31617 cut-off events. For 261932/261932 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 218651 event pairs, 5083 based on Foata normal form. 33/21988 useless extension candidates. Maximal degree in co-relation 163963. Up to 8434 conditions per place. [2023-08-27 07:16:32,267 INFO L140 encePairwiseOnDemand]: 590/612 looper letters, 624 selfloop transitions, 197 changer transitions 0/821 dead transitions. [2023-08-27 07:16:32,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 821 transitions, 9752 flow [2023-08-27 07:16:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 07:16:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 07:16:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6687 transitions. [2023-08-27 07:16:32,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3035130718954248 [2023-08-27 07:16:32,273 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6687 transitions. [2023-08-27 07:16:32,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6687 transitions. [2023-08-27 07:16:32,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:16:32,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6687 transitions. [2023-08-27 07:16:32,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 185.75) internal successors, (6687), 36 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:32,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 612.0) internal successors, (22644), 37 states have internal predecessors, (22644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:32,288 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 612.0) internal successors, (22644), 37 states have internal predecessors, (22644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:32,288 INFO L175 Difference]: Start difference. First operand has 259 places, 420 transitions, 5336 flow. Second operand 36 states and 6687 transitions. [2023-08-27 07:16:32,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 821 transitions, 9752 flow [2023-08-27 07:16:33,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 821 transitions, 9513 flow, removed 77 selfloop flow, removed 14 redundant places. [2023-08-27 07:16:33,596 INFO L231 Difference]: Finished difference. Result has 293 places, 485 transitions, 6739 flow [2023-08-27 07:16:33,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=5161, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6739, PETRI_PLACES=293, PETRI_TRANSITIONS=485} [2023-08-27 07:16:33,596 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 226 predicate places. [2023-08-27 07:16:33,596 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 485 transitions, 6739 flow [2023-08-27 07:16:33,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 177.5) internal successors, (5325), 30 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:33,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:16:33,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:16:33,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-27 07:16:33,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:16:33,801 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:16:33,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:16:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2138310765, now seen corresponding path program 1 times [2023-08-27 07:16:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:16:33,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032203230] [2023-08-27 07:16:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:16:33,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:16:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:16:34,187 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 07:16:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:16:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032203230] [2023-08-27 07:16:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032203230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:16:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076170260] [2023-08-27 07:16:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:16:34,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:16:34,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:16:34,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:16:34,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 07:16:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:16:34,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 07:16:34,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:16:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:16:34,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 07:16:34,535 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 07:16:34,550 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 07:16:34,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:16:34,582 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1136 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1136) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) |c_thread2Thread1of1ForFork0_~s~0#1|) 2147483648)) is different from false [2023-08-27 07:16:34,590 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:16:34,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-27 07:16:34,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-27 07:16:34,734 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 07:16:34,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076170260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:16:34,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:16:34,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 07:16:34,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524849275] [2023-08-27 07:16:34,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:16:34,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 07:16:34,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:16:34,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 07:16:34,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=513, Unknown=1, NotChecked=46, Total=650 [2023-08-27 07:16:34,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 612 [2023-08-27 07:16:34,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 485 transitions, 6739 flow. Second operand has 26 states, 26 states have (on average 186.73076923076923) internal successors, (4855), 26 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:16:34,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:16:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 612 [2023-08-27 07:16:34,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:16:52,075 WARN L234 SmtUtils]: Spent 16.22s on a formula simplification. DAG size of input: 28 DAG size of output: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:17:01,873 INFO L124 PetriNetUnfolderBase]: 31553/47524 cut-off events. [2023-08-27 07:17:01,873 INFO L125 PetriNetUnfolderBase]: For 514402/514402 co-relation queries the response was YES. [2023-08-27 07:17:02,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271383 conditions, 47524 events. 31553/47524 cut-off events. For 514402/514402 co-relation queries the response was YES. Maximal size of possible extension queue 2381. Compared 342533 event pairs, 7714 based on Foata normal form. 407/33685 useless extension candidates. Maximal degree in co-relation 271279. Up to 12475 conditions per place. [2023-08-27 07:17:02,905 INFO L140 encePairwiseOnDemand]: 590/612 looper letters, 927 selfloop transitions, 202 changer transitions 0/1129 dead transitions. [2023-08-27 07:17:02,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1129 transitions, 13767 flow [2023-08-27 07:17:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 07:17:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 07:17:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6954 transitions. [2023-08-27 07:17:02,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3246498599439776 [2023-08-27 07:17:02,912 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6954 transitions. [2023-08-27 07:17:02,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6954 transitions. [2023-08-27 07:17:02,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:17:02,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6954 transitions. [2023-08-27 07:17:02,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 198.68571428571428) internal successors, (6954), 35 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:02,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 612.0) internal successors, (22032), 36 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:02,965 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 612.0) internal successors, (22032), 36 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:02,965 INFO L175 Difference]: Start difference. First operand has 293 places, 485 transitions, 6739 flow. Second operand 35 states and 6954 transitions. [2023-08-27 07:17:02,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1129 transitions, 13767 flow [2023-08-27 07:17:05,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1129 transitions, 13583 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-08-27 07:17:05,483 INFO L231 Difference]: Finished difference. Result has 328 places, 544 transitions, 8343 flow [2023-08-27 07:17:05,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=6514, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8343, PETRI_PLACES=328, PETRI_TRANSITIONS=544} [2023-08-27 07:17:05,485 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 261 predicate places. [2023-08-27 07:17:05,485 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 544 transitions, 8343 flow [2023-08-27 07:17:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 186.73076923076923) internal successors, (4855), 26 states have internal predecessors, (4855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:05,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:17:05,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:17:05,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 07:17:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 07:17:05,690 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:17:05,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:17:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1688346002, now seen corresponding path program 2 times [2023-08-27 07:17:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:17:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833250732] [2023-08-27 07:17:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:17:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:17:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:17:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:17:06,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:17:06,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833250732] [2023-08-27 07:17:06,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833250732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:17:06,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679517588] [2023-08-27 07:17:06,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:17:06,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:17:06,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:17:06,382 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:17:06,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 07:17:06,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:17:06,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:17:06,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 07:17:06,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:17:06,693 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 07:17:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 07:17:06,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:17:06,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679517588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:17:06,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:17:06,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2023-08-27 07:17:06,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287946698] [2023-08-27 07:17:06,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:17:06,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:17:06,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:17:06,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:17:06,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-08-27 07:17:06,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 612 [2023-08-27 07:17:06,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 544 transitions, 8343 flow. Second operand has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:06,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:17:06,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 612 [2023-08-27 07:17:06,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:17:16,559 INFO L124 PetriNetUnfolderBase]: 31737/47788 cut-off events. [2023-08-27 07:17:16,560 INFO L125 PetriNetUnfolderBase]: For 520445/520445 co-relation queries the response was YES. [2023-08-27 07:17:17,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296428 conditions, 47788 events. 31737/47788 cut-off events. For 520445/520445 co-relation queries the response was YES. Maximal size of possible extension queue 2310. Compared 346205 event pairs, 6351 based on Foata normal form. 70/34082 useless extension candidates. Maximal degree in co-relation 296310. Up to 31070 conditions per place. [2023-08-27 07:17:17,714 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 484 selfloop transitions, 105 changer transitions 0/589 dead transitions. [2023-08-27 07:17:17,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 589 transitions, 9902 flow [2023-08-27 07:17:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:17:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:17:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1250 transitions. [2023-08-27 07:17:17,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084967320261438 [2023-08-27 07:17:17,715 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1250 transitions. [2023-08-27 07:17:17,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1250 transitions. [2023-08-27 07:17:17,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:17:17,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1250 transitions. [2023-08-27 07:17:17,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:17,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:17,718 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 612.0) internal successors, (3672), 6 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:17,718 INFO L175 Difference]: Start difference. First operand has 328 places, 544 transitions, 8343 flow. Second operand 5 states and 1250 transitions. [2023-08-27 07:17:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 589 transitions, 9902 flow [2023-08-27 07:17:22,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 589 transitions, 9657 flow, removed 43 selfloop flow, removed 12 redundant places. [2023-08-27 07:17:22,501 INFO L231 Difference]: Finished difference. Result has 322 places, 545 transitions, 8475 flow [2023-08-27 07:17:22,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8048, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8475, PETRI_PLACES=322, PETRI_TRANSITIONS=545} [2023-08-27 07:17:22,502 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 255 predicate places. [2023-08-27 07:17:22,502 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 545 transitions, 8475 flow [2023-08-27 07:17:22,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.8) internal successors, (1174), 5 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:22,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:17:22,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:17:22,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 07:17:22,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 07:17:22,706 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:17:22,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:17:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash -616689362, now seen corresponding path program 2 times [2023-08-27 07:17:22,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:17:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073849661] [2023-08-27 07:17:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:17:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:17:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:17:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:17:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:17:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073849661] [2023-08-27 07:17:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073849661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:17:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711595287] [2023-08-27 07:17:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:17:23,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:17:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:17:23,553 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:17:23,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 07:17:23,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:17:23,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:17:23,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:17:23,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:17:23,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:17:23,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:17:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:17:23,881 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 07:17:23,905 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 07:17:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:17:23,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:17:23,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711595287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:17:23,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:17:23,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-27 07:17:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218341232] [2023-08-27 07:17:23,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:17:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 07:17:23,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:17:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 07:17:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:17:23,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 612 [2023-08-27 07:17:23,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 545 transitions, 8475 flow. Second operand has 10 states, 10 states have (on average 216.5) internal successors, (2165), 10 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:23,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:17:23,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 612 [2023-08-27 07:17:23,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:17:34,038 INFO L124 PetriNetUnfolderBase]: 32681/49505 cut-off events. [2023-08-27 07:17:34,038 INFO L125 PetriNetUnfolderBase]: For 722566/722566 co-relation queries the response was YES. [2023-08-27 07:17:34,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309136 conditions, 49505 events. 32681/49505 cut-off events. For 722566/722566 co-relation queries the response was YES. Maximal size of possible extension queue 2457. Compared 359179 event pairs, 11455 based on Foata normal form. 136/35293 useless extension candidates. Maximal degree in co-relation 309019. Up to 41069 conditions per place. [2023-08-27 07:17:34,959 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 480 selfloop transitions, 118 changer transitions 0/598 dead transitions. [2023-08-27 07:17:34,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 598 transitions, 10112 flow [2023-08-27 07:17:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:17:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:17:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1820 transitions. [2023-08-27 07:17:34,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37173202614379086 [2023-08-27 07:17:34,973 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1820 transitions. [2023-08-27 07:17:34,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1820 transitions. [2023-08-27 07:17:34,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:17:34,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1820 transitions. [2023-08-27 07:17:34,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 227.5) internal successors, (1820), 8 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:34,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:34,977 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:34,977 INFO L175 Difference]: Start difference. First operand has 322 places, 545 transitions, 8475 flow. Second operand 8 states and 1820 transitions. [2023-08-27 07:17:34,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 598 transitions, 10112 flow [2023-08-27 07:17:39,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 598 transitions, 10010 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 07:17:39,286 INFO L231 Difference]: Finished difference. Result has 328 places, 548 transitions, 8705 flow [2023-08-27 07:17:39,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8705, PETRI_PLACES=328, PETRI_TRANSITIONS=548} [2023-08-27 07:17:39,291 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 261 predicate places. [2023-08-27 07:17:39,291 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 548 transitions, 8705 flow [2023-08-27 07:17:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.5) internal successors, (2165), 10 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:39,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:17:39,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:17:39,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 07:17:39,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 07:17:39,496 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:17:39,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:17:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash 109828939, now seen corresponding path program 1 times [2023-08-27 07:17:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:17:39,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192351428] [2023-08-27 07:17:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:17:39,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:17:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:17:39,944 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 07:17:39,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:17:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192351428] [2023-08-27 07:17:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192351428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:17:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010150045] [2023-08-27 07:17:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:17:39,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:17:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:17:39,957 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:17:39,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 07:17:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:17:40,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 07:17:40,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:17:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:17:40,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:17:40,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:17:40,284 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 07:17:40,302 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 07:17:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:17:40,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:17:40,348 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1320 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1320) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-27 07:17:40,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:17:40,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 157 [2023-08-27 07:17:40,400 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 31 treesize of output 25 [2023-08-27 07:17:40,404 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 32 treesize of output 20 [2023-08-27 07:17:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:17:40,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010150045] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:17:40,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:17:40,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 24 [2023-08-27 07:17:40,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589908247] [2023-08-27 07:17:40,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:17:40,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 07:17:40,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:17:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 07:17:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=513, Unknown=6, NotChecked=46, Total=650 [2023-08-27 07:17:40,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 612 [2023-08-27 07:17:40,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 548 transitions, 8705 flow. Second operand has 9 states, 9 states have (on average 217.66666666666666) internal successors, (1959), 9 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:40,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:17:40,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 612 [2023-08-27 07:17:40,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:17:55,156 INFO L124 PetriNetUnfolderBase]: 32575/49327 cut-off events. [2023-08-27 07:17:55,156 INFO L125 PetriNetUnfolderBase]: For 569039/569039 co-relation queries the response was YES. [2023-08-27 07:17:55,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309979 conditions, 49327 events. 32575/49327 cut-off events. For 569039/569039 co-relation queries the response was YES. Maximal size of possible extension queue 2526. Compared 362060 event pairs, 8505 based on Foata normal form. 130/35109 useless extension candidates. Maximal degree in co-relation 309860. Up to 35414 conditions per place. [2023-08-27 07:17:56,221 INFO L140 encePairwiseOnDemand]: 596/612 looper letters, 394 selfloop transitions, 217 changer transitions 0/611 dead transitions. [2023-08-27 07:17:56,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 611 transitions, 10524 flow [2023-08-27 07:17:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:17:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:17:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2256 transitions. [2023-08-27 07:17:56,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686274509803922 [2023-08-27 07:17:56,223 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2256 transitions. [2023-08-27 07:17:56,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2256 transitions. [2023-08-27 07:17:56,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:17:56,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2256 transitions. [2023-08-27 07:17:56,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 225.6) internal successors, (2256), 10 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:56,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 612.0) internal successors, (6732), 11 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:56,249 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 612.0) internal successors, (6732), 11 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:56,250 INFO L175 Difference]: Start difference. First operand has 328 places, 548 transitions, 8705 flow. Second operand 10 states and 2256 transitions. [2023-08-27 07:17:56,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 611 transitions, 10524 flow [2023-08-27 07:18:00,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 611 transitions, 10406 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-27 07:18:00,237 INFO L231 Difference]: Finished difference. Result has 337 places, 571 transitions, 9607 flow [2023-08-27 07:18:00,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8583, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9607, PETRI_PLACES=337, PETRI_TRANSITIONS=571} [2023-08-27 07:18:00,238 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 270 predicate places. [2023-08-27 07:18:00,238 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 571 transitions, 9607 flow [2023-08-27 07:18:00,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 217.66666666666666) internal successors, (1959), 9 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:00,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:18:00,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:18:00,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 07:18:00,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 07:18:00,442 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:18:00,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:18:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash -7551682, now seen corresponding path program 1 times [2023-08-27 07:18:00,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:18:00,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358522345] [2023-08-27 07:18:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:00,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:18:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:00,504 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 07:18:00,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:18:00,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358522345] [2023-08-27 07:18:00,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358522345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:18:00,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128674161] [2023-08-27 07:18:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:00,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:18:00,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:18:00,526 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:18:00,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 07:18:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:00,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 07:18:00,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:18:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:18:00,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:18:00,787 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 07:18:00,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128674161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:18:00,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:18:00,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-27 07:18:00,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331712233] [2023-08-27 07:18:00,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:18:00,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 07:18:00,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:18:00,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 07:18:00,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-27 07:18:00,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 612 [2023-08-27 07:18:00,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 571 transitions, 9607 flow. Second operand has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:00,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:18:00,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 612 [2023-08-27 07:18:00,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:18:16,394 INFO L124 PetriNetUnfolderBase]: 47170/72928 cut-off events. [2023-08-27 07:18:16,402 INFO L125 PetriNetUnfolderBase]: For 1715404/1715404 co-relation queries the response was YES. [2023-08-27 07:18:17,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472266 conditions, 72928 events. 47170/72928 cut-off events. For 1715404/1715404 co-relation queries the response was YES. Maximal size of possible extension queue 3593. Compared 577012 event pairs, 23761 based on Foata normal form. 5744/57218 useless extension candidates. Maximal degree in co-relation 472144. Up to 47305 conditions per place. [2023-08-27 07:18:17,985 INFO L140 encePairwiseOnDemand]: 600/612 looper letters, 648 selfloop transitions, 124 changer transitions 74/846 dead transitions. [2023-08-27 07:18:17,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 846 transitions, 15904 flow [2023-08-27 07:18:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:18:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:18:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2267 transitions. [2023-08-27 07:18:17,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704248366013072 [2023-08-27 07:18:17,988 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2267 transitions. [2023-08-27 07:18:17,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2267 transitions. [2023-08-27 07:18:17,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:18:17,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2267 transitions. [2023-08-27 07:18:17,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 226.7) internal successors, (2267), 10 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:17,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 612.0) internal successors, (6732), 11 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:17,993 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 612.0) internal successors, (6732), 11 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:17,993 INFO L175 Difference]: Start difference. First operand has 337 places, 571 transitions, 9607 flow. Second operand 10 states and 2267 transitions. [2023-08-27 07:18:17,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 846 transitions, 15904 flow [2023-08-27 07:18:28,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 846 transitions, 15386 flow, removed 76 selfloop flow, removed 6 redundant places. [2023-08-27 07:18:28,407 INFO L231 Difference]: Finished difference. Result has 345 places, 577 transitions, 9935 flow [2023-08-27 07:18:28,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=9259, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9935, PETRI_PLACES=345, PETRI_TRANSITIONS=577} [2023-08-27 07:18:28,408 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 278 predicate places. [2023-08-27 07:18:28,408 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 577 transitions, 9935 flow [2023-08-27 07:18:28,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:28,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:18:28,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:18:28,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 07:18:28,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:18:28,615 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:18:28,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:18:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash -754288562, now seen corresponding path program 3 times [2023-08-27 07:18:28,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:18:28,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916273233] [2023-08-27 07:18:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:28,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:18:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:29,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:18:29,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916273233] [2023-08-27 07:18:29,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916273233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:18:29,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971375764] [2023-08-27 07:18:29,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:18:29,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:18:29,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:18:29,361 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:18:29,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 07:18:29,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 07:18:29,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:18:29,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 07:18:29,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:18:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:18:29,674 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 07:18:29,697 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 07:18:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:18:29,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:18:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971375764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:18:29,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:18:29,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 18 [2023-08-27 07:18:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772527707] [2023-08-27 07:18:29,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:18:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 07:18:29,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:18:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 07:18:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:18:29,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 612 [2023-08-27 07:18:29,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 577 transitions, 9935 flow. Second operand has 9 states, 9 states have (on average 219.66666666666666) internal successors, (1977), 9 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:29,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:18:29,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 612 [2023-08-27 07:18:29,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:18:44,707 INFO L124 PetriNetUnfolderBase]: 45483/69928 cut-off events. [2023-08-27 07:18:44,707 INFO L125 PetriNetUnfolderBase]: For 1268542/1268542 co-relation queries the response was YES. [2023-08-27 07:18:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449505 conditions, 69928 events. 45483/69928 cut-off events. For 1268542/1268542 co-relation queries the response was YES. Maximal size of possible extension queue 3332. Compared 546406 event pairs, 19320 based on Foata normal form. 179/49065 useless extension candidates. Maximal degree in co-relation 449395. Up to 63270 conditions per place. [2023-08-27 07:18:46,666 INFO L140 encePairwiseOnDemand]: 603/612 looper letters, 547 selfloop transitions, 65 changer transitions 11/623 dead transitions. [2023-08-27 07:18:46,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 623 transitions, 11517 flow [2023-08-27 07:18:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:18:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:18:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1843 transitions. [2023-08-27 07:18:46,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3764297385620915 [2023-08-27 07:18:46,670 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1843 transitions. [2023-08-27 07:18:46,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1843 transitions. [2023-08-27 07:18:46,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:18:46,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1843 transitions. [2023-08-27 07:18:46,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 230.375) internal successors, (1843), 8 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:46,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:46,677 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 612.0) internal successors, (5508), 9 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:46,678 INFO L175 Difference]: Start difference. First operand has 345 places, 577 transitions, 9935 flow. Second operand 8 states and 1843 transitions. [2023-08-27 07:18:46,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 623 transitions, 11517 flow [2023-08-27 07:18:56,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 623 transitions, 10879 flow, removed 34 selfloop flow, removed 17 redundant places. [2023-08-27 07:18:56,423 INFO L231 Difference]: Finished difference. Result has 327 places, 561 transitions, 9123 flow [2023-08-27 07:18:56,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9123, PETRI_PLACES=327, PETRI_TRANSITIONS=561} [2023-08-27 07:18:56,423 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 260 predicate places. [2023-08-27 07:18:56,423 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 561 transitions, 9123 flow [2023-08-27 07:18:56,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 219.66666666666666) internal successors, (1977), 9 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:56,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:18:56,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:18:56,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 07:18:56,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:18:56,629 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:18:56,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:18:56,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1566625740, now seen corresponding path program 1 times [2023-08-27 07:18:56,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:18:56,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501284462] [2023-08-27 07:18:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:56,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:18:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:18:56,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:18:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501284462] [2023-08-27 07:18:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501284462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:18:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486465982] [2023-08-27 07:18:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:56,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:18:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:18:56,676 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:18:56,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 07:18:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:56,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 07:18:56,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:18:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:18:56,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:18:56,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486465982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:18:56,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:18:56,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 07:18:56,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683650711] [2023-08-27 07:18:56,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:18:56,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:18:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:18:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:18:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:18:56,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 612 [2023-08-27 07:18:56,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 561 transitions, 9123 flow. Second operand has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:56,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:18:56,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 612 [2023-08-27 07:18:56,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:19:10,065 INFO L124 PetriNetUnfolderBase]: 41687/64268 cut-off events. [2023-08-27 07:19:10,065 INFO L125 PetriNetUnfolderBase]: For 923436/923436 co-relation queries the response was YES. [2023-08-27 07:19:11,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378577 conditions, 64268 events. 41687/64268 cut-off events. For 923436/923436 co-relation queries the response was YES. Maximal size of possible extension queue 3164. Compared 500596 event pairs, 15341 based on Foata normal form. 1394/46118 useless extension candidates. Maximal degree in co-relation 378476. Up to 42624 conditions per place. [2023-08-27 07:19:11,279 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 505 selfloop transitions, 79 changer transitions 0/584 dead transitions. [2023-08-27 07:19:11,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 584 transitions, 10224 flow [2023-08-27 07:19:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:19:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:19:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1084 transitions. [2023-08-27 07:19:11,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281045751633985 [2023-08-27 07:19:11,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1084 transitions. [2023-08-27 07:19:11,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1084 transitions. [2023-08-27 07:19:11,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:19:11,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1084 transitions. [2023-08-27 07:19:11,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:11,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:11,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:11,283 INFO L175 Difference]: Start difference. First operand has 327 places, 561 transitions, 9123 flow. Second operand 4 states and 1084 transitions. [2023-08-27 07:19:11,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 584 transitions, 10224 flow [2023-08-27 07:19:16,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 584 transitions, 9990 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-08-27 07:19:16,426 INFO L231 Difference]: Finished difference. Result has 309 places, 549 transitions, 8764 flow [2023-08-27 07:19:16,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=8764, PETRI_PLACES=309, PETRI_TRANSITIONS=549} [2023-08-27 07:19:16,427 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 242 predicate places. [2023-08-27 07:19:16,427 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 549 transitions, 8764 flow [2023-08-27 07:19:16,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:16,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:19:16,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:19:16,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 07:19:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:16,633 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:19:16,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:19:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1965526698, now seen corresponding path program 1 times [2023-08-27 07:19:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:19:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293767788] [2023-08-27 07:19:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:19:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:19:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:19:16,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293767788] [2023-08-27 07:19:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293767788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:19:16,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:19:16,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 07:19:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825319421] [2023-08-27 07:19:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:19:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:19:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:19:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:19:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:19:16,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 612 [2023-08-27 07:19:16,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 549 transitions, 8764 flow. Second operand has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:16,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:19:16,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 612 [2023-08-27 07:19:16,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:19:32,565 INFO L124 PetriNetUnfolderBase]: 51327/79536 cut-off events. [2023-08-27 07:19:32,565 INFO L125 PetriNetUnfolderBase]: For 918087/918087 co-relation queries the response was YES. [2023-08-27 07:19:33,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439991 conditions, 79536 events. 51327/79536 cut-off events. For 918087/918087 co-relation queries the response was YES. Maximal size of possible extension queue 2968. Compared 626103 event pairs, 11472 based on Foata normal form. 2646/55994 useless extension candidates. Maximal degree in co-relation 439897. Up to 31971 conditions per place. [2023-08-27 07:19:34,264 INFO L140 encePairwiseOnDemand]: 608/612 looper letters, 548 selfloop transitions, 76 changer transitions 2/626 dead transitions. [2023-08-27 07:19:34,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 626 transitions, 10778 flow [2023-08-27 07:19:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:19:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:19:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1121 transitions. [2023-08-27 07:19:34,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579248366013072 [2023-08-27 07:19:34,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1121 transitions. [2023-08-27 07:19:34,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1121 transitions. [2023-08-27 07:19:34,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:19:34,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1121 transitions. [2023-08-27 07:19:34,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:34,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:34,267 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 612.0) internal successors, (3060), 5 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:34,267 INFO L175 Difference]: Start difference. First operand has 309 places, 549 transitions, 8764 flow. Second operand 4 states and 1121 transitions. [2023-08-27 07:19:34,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 626 transitions, 10778 flow [2023-08-27 07:19:38,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 626 transitions, 10610 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 07:19:38,835 INFO L231 Difference]: Finished difference. Result has 311 places, 561 transitions, 9061 flow [2023-08-27 07:19:38,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=612, PETRI_DIFFERENCE_MINUEND_FLOW=8460, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=9061, PETRI_PLACES=311, PETRI_TRANSITIONS=561} [2023-08-27 07:19:38,836 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 244 predicate places. [2023-08-27 07:19:38,836 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 561 transitions, 9061 flow [2023-08-27 07:19:38,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:38,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:19:38,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:19:38,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-27 07:19:38,836 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-27 07:19:38,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:19:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1275623948, now seen corresponding path program 1 times [2023-08-27 07:19:38,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:19:38,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139575089] [2023-08-27 07:19:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:38,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:19:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:19:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:19:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139575089] [2023-08-27 07:19:39,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139575089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:19:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513589085] [2023-08-27 07:19:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:39,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:19:39,077 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:19:39,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 07:19:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:39,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:19:39,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:19:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:19:39,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:19:39,390 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:19:39,391 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 07:19:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:19:39,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513589085] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:19:39,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:19:39,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 6] total 10 [2023-08-27 07:19:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323590958] [2023-08-27 07:19:39,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:19:39,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:19:39,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:19:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:19:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-27 07:19:39,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 612 [2023-08-27 07:19:39,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 561 transitions, 9061 flow. Second operand has 4 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:39,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:19:39,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 612 [2023-08-27 07:19:39,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand