/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/unroll-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:47:31,907 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:47:31,971 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 08:47:31,974 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:47:31,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:47:31,994 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:47:31,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:47:31,995 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:47:31,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:47:31,998 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:47:31,998 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:47:31,998 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:47:31,998 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:47:31,999 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:47:31,999 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:47:31,999 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:47:32,000 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:47:32,000 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:47:32,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:47:32,000 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:47:32,000 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:47:32,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:47:32,001 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:47:32,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:47:32,002 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:47:32,002 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:47:32,002 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:47:32,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:47:32,002 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:47:32,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:47:32,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:47:32,003 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:47:32,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:47:32,003 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:47:32,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:47:32,004 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:47:32,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:47:32,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:47:32,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:47:32,253 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:47:32,253 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:47:32,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-27 08:47:33,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:47:33,290 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:47:33,290 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-27 08:47:33,295 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a31c5b5/15d04ed2af3a47baa7b90764d8180194/FLAG12c44015c [2023-08-27 08:47:33,308 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a31c5b5/15d04ed2af3a47baa7b90764d8180194 [2023-08-27 08:47:33,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:47:33,312 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:47:33,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:47:33,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:47:33,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:47:33,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5112ac1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33, skipping insertion in model container [2023-08-27 08:47:33,319 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,335 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:47:33,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:47:33,486 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:47:33,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:47:33,526 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:47:33,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33 WrapperNode [2023-08-27 08:47:33,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:47:33,528 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:47:33,528 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:47:33,528 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:47:33,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,542 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,566 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 142 [2023-08-27 08:47:33,566 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:47:33,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:47:33,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:47:33,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:47:33,572 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,593 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:47:33,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:47:33,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:47:33,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:47:33,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (1/1) ... [2023-08-27 08:47:33,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:47:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:33,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 08:47:33,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 08:47:33,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:47:33,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:47:33,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:47:33,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:47:33,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:47:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:47:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:47:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:47:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:47:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:47:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:47:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:47:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:47:33,654 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 08:47:33,717 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:47:33,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:47:33,874 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:47:33,880 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:47:33,880 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 08:47:33,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:47:33 BoogieIcfgContainer [2023-08-27 08:47:33,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:47:33,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:47:33,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:47:33,885 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:47:33,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:47:33" (1/3) ... [2023-08-27 08:47:33,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693baaa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:47:33, skipping insertion in model container [2023-08-27 08:47:33,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:47:33" (2/3) ... [2023-08-27 08:47:33,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693baaa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:47:33, skipping insertion in model container [2023-08-27 08:47:33,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:47:33" (3/3) ... [2023-08-27 08:47:33,887 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-08-27 08:47:33,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:47:33,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-27 08:47:33,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:47:33,947 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 08:47:33,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 342 flow [2023-08-27 08:47:34,013 INFO L124 PetriNetUnfolderBase]: 14/161 cut-off events. [2023-08-27 08:47:34,013 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:47:34,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 14/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 159 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-27 08:47:34,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 163 transitions, 342 flow [2023-08-27 08:47:34,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 152 transitions, 316 flow [2023-08-27 08:47:34,022 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:47:34,028 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 152 transitions, 316 flow [2023-08-27 08:47:34,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 152 transitions, 316 flow [2023-08-27 08:47:34,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 152 transitions, 316 flow [2023-08-27 08:47:34,052 INFO L124 PetriNetUnfolderBase]: 14/152 cut-off events. [2023-08-27 08:47:34,052 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:47:34,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 14/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 153 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-27 08:47:34,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 1942 [2023-08-27 08:47:37,806 INFO L134 LiptonReduction]: Checked pairs total: 1834 [2023-08-27 08:47:37,806 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-27 08:47:37,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:47:37,818 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;@24cfe903, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:47:37,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-27 08:47:37,820 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:47:37,820 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:47:37,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:47:37,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:37,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:47:37,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:37,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash 20578, now seen corresponding path program 1 times [2023-08-27 08:47:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:37,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645009158] [2023-08-27 08:47:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:37,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:38,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645009158] [2023-08-27 08:47:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645009158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:38,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:38,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:47:38,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000801228] [2023-08-27 08:47:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:38,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:47:38,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:47:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:47:38,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 336 [2023-08-27 08:47:38,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:38,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 336 [2023-08-27 08:47:38,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:38,082 INFO L124 PetriNetUnfolderBase]: 49/84 cut-off events. [2023-08-27 08:47:38,083 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 08:47:38,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 191 event pairs, 19 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 129. Up to 79 conditions per place. [2023-08-27 08:47:38,085 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-27 08:47:38,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 80 flow [2023-08-27 08:47:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:47:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:47:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-08-27 08:47:38,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-08-27 08:47:38,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-08-27 08:47:38,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-08-27 08:47:38,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:38,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-08-27 08:47:38,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,115 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 434 transitions. [2023-08-27 08:47:38,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 80 flow [2023-08-27 08:47:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 08:47:38,118 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 44 flow [2023-08-27 08:47:38,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-27 08:47:38,121 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-08-27 08:47:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 44 flow [2023-08-27 08:47:38,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:38,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:47:38,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:47:38,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:38,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 20577, now seen corresponding path program 1 times [2023-08-27 08:47:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130375603] [2023-08-27 08:47:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:38,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:38,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130375603] [2023-08-27 08:47:38,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130375603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:38,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:38,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:47:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353398809] [2023-08-27 08:47:38,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:47:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:47:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:47:38,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 336 [2023-08-27 08:47:38,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:38,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 336 [2023-08-27 08:47:38,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:38,238 INFO L124 PetriNetUnfolderBase]: 50/86 cut-off events. [2023-08-27 08:47:38,238 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:47:38,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 86 events. 50/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 191 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 161. Up to 83 conditions per place. [2023-08-27 08:47:38,238 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 15 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2023-08-27 08:47:38,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 86 flow [2023-08-27 08:47:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:47:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:47:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-27 08:47:38,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2023-08-27 08:47:38,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-27 08:47:38,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-27 08:47:38,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:38,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-27 08:47:38,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,244 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 44 flow. Second operand 3 states and 436 transitions. [2023-08-27 08:47:38,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 86 flow [2023-08-27 08:47:38,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:47:38,249 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-08-27 08:47:38,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-08-27 08:47:38,250 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2023-08-27 08:47:38,250 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-08-27 08:47:38,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:38,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:47:38,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 08:47:38,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:38,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 639213, now seen corresponding path program 1 times [2023-08-27 08:47:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:38,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009826854] [2023-08-27 08:47:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:38,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009826854] [2023-08-27 08:47:38,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009826854] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:38,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197780954] [2023-08-27 08:47:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:38,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:38,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:38,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:38,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 08:47:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:38,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:47:38,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:38,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197780954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:38,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:38,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 08:47:38,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259768278] [2023-08-27 08:47:38,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:38,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:47:38,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:38,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:47:38,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:47:38,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 336 [2023-08-27 08:47:38,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:38,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 336 [2023-08-27 08:47:38,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:38,499 INFO L124 PetriNetUnfolderBase]: 53/92 cut-off events. [2023-08-27 08:47:38,499 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:47:38,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 92 events. 53/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 209 event pairs, 19 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 161. Up to 86 conditions per place. [2023-08-27 08:47:38,500 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 15 selfloop transitions, 9 changer transitions 0/26 dead transitions. [2023-08-27 08:47:38,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 131 flow [2023-08-27 08:47:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:47:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:47:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 861 transitions. [2023-08-27 08:47:38,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2023-08-27 08:47:38,503 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 861 transitions. [2023-08-27 08:47:38,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 861 transitions. [2023-08-27 08:47:38,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:38,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 861 transitions. [2023-08-27 08:47:38,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,509 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 6 states and 861 transitions. [2023-08-27 08:47:38,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 131 flow [2023-08-27 08:47:38,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 126 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:47:38,510 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 115 flow [2023-08-27 08:47:38,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2023-08-27 08:47:38,512 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-08-27 08:47:38,512 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 115 flow [2023-08-27 08:47:38,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:38,512 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:47:38,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 08:47:38,721 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 08:47:38,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:38,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:38,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1864242017, now seen corresponding path program 2 times [2023-08-27 08:47:38,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:38,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562060663] [2023-08-27 08:47:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:38,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:38,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:38,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562060663] [2023-08-27 08:47:38,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562060663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:38,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068462203] [2023-08-27 08:47:38,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:47:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:38,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:38,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 08:47:38,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:47:38,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:47:38,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:47:38,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:47:38,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:47:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068462203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:38,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:47:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:47:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398810256] [2023-08-27 08:47:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:38,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:47:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:47:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:47:38,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 336 [2023-08-27 08:47:38,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:38,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 336 [2023-08-27 08:47:38,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:38,909 INFO L124 PetriNetUnfolderBase]: 53/91 cut-off events. [2023-08-27 08:47:38,909 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:47:38,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 91 events. 53/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 217 event pairs, 19 based on Foata normal form. 1/59 useless extension candidates. Maximal degree in co-relation 187. Up to 88 conditions per place. [2023-08-27 08:47:38,910 INFO L140 encePairwiseOnDemand]: 334/336 looper letters, 22 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-27 08:47:38,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 151 flow [2023-08-27 08:47:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:47:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:47:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-27 08:47:38,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2023-08-27 08:47:38,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-27 08:47:38,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-27 08:47:38,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:38,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-27 08:47:38,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,915 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 115 flow. Second operand 3 states and 436 transitions. [2023-08-27 08:47:38,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 151 flow [2023-08-27 08:47:38,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 114 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-27 08:47:38,916 INFO L231 Difference]: Finished difference. Result has 24 places, 25 transitions, 70 flow [2023-08-27 08:47:38,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=24, PETRI_TRANSITIONS=25} [2023-08-27 08:47:38,917 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1 predicate places. [2023-08-27 08:47:38,917 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 25 transitions, 70 flow [2023-08-27 08:47:38,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:38,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:38,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:38,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 08:47:39,121 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 08:47:39,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:39,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash -54470800, now seen corresponding path program 1 times [2023-08-27 08:47:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:39,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699895998] [2023-08-27 08:47:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:39,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699895998] [2023-08-27 08:47:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699895998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:39,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:39,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:47:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776492711] [2023-08-27 08:47:39,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:39,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:47:39,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:47:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:47:39,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 336 [2023-08-27 08:47:39,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:39,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 336 [2023-08-27 08:47:39,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:39,231 INFO L124 PetriNetUnfolderBase]: 52/90 cut-off events. [2023-08-27 08:47:39,232 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:47:39,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 90 events. 52/90 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 206 event pairs, 19 based on Foata normal form. 1/59 useless extension candidates. Maximal degree in co-relation 184. Up to 87 conditions per place. [2023-08-27 08:47:39,233 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 20 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-27 08:47:39,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 110 flow [2023-08-27 08:47:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:47:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:47:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-27 08:47:39,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41865079365079366 [2023-08-27 08:47:39,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-27 08:47:39,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-27 08:47:39,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:39,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-27 08:47:39,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,238 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 70 flow. Second operand 3 states and 422 transitions. [2023-08-27 08:47:39,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 110 flow [2023-08-27 08:47:39,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:47:39,239 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 69 flow [2023-08-27 08:47:39,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-08-27 08:47:39,241 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-08-27 08:47:39,241 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 69 flow [2023-08-27 08:47:39,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:39,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:39,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 08:47:39,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:39,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:39,244 INFO L85 PathProgramCache]: Analyzing trace with hash -104212996, now seen corresponding path program 1 times [2023-08-27 08:47:39,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:39,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500288510] [2023-08-27 08:47:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:39,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500288510] [2023-08-27 08:47:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500288510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:39,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:39,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:47:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612790950] [2023-08-27 08:47:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:39,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:47:39,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:47:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:47:39,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 336 [2023-08-27 08:47:39,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:39,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 336 [2023-08-27 08:47:39,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:39,376 INFO L124 PetriNetUnfolderBase]: 69/123 cut-off events. [2023-08-27 08:47:39,377 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:47:39,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 123 events. 69/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 329 event pairs, 9 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 252. Up to 85 conditions per place. [2023-08-27 08:47:39,377 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 28 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2023-08-27 08:47:39,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 156 flow [2023-08-27 08:47:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:47:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:47:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-27 08:47:39,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42757936507936506 [2023-08-27 08:47:39,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-27 08:47:39,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-27 08:47:39,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:39,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-27 08:47:39,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,382 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 69 flow. Second operand 3 states and 431 transitions. [2023-08-27 08:47:39,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 156 flow [2023-08-27 08:47:39,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:47:39,383 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 84 flow [2023-08-27 08:47:39,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2023-08-27 08:47:39,385 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-08-27 08:47:39,385 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 84 flow [2023-08-27 08:47:39,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:39,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:39,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 08:47:39,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:39,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 590958092, now seen corresponding path program 1 times [2023-08-27 08:47:39,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:39,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325986504] [2023-08-27 08:47:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:39,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:39,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:39,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325986504] [2023-08-27 08:47:39,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325986504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:39,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:39,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:47:39,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522856533] [2023-08-27 08:47:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:39,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:47:39,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:47:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:47:39,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:47:39,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:39,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:47:39,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:39,590 INFO L124 PetriNetUnfolderBase]: 88/176 cut-off events. [2023-08-27 08:47:39,590 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-27 08:47:39,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 176 events. 88/176 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 573 event pairs, 26 based on Foata normal form. 12/187 useless extension candidates. Maximal degree in co-relation 409. Up to 93 conditions per place. [2023-08-27 08:47:39,591 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 37 selfloop transitions, 4 changer transitions 8/49 dead transitions. [2023-08-27 08:47:39,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 49 transitions, 243 flow [2023-08-27 08:47:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:47:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:47:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2023-08-27 08:47:39,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172619047619048 [2023-08-27 08:47:39,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2023-08-27 08:47:39,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2023-08-27 08:47:39,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:39,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2023-08-27 08:47:39,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 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 08:47:39,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,596 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,597 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 84 flow. Second operand 5 states and 701 transitions. [2023-08-27 08:47:39,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 49 transitions, 243 flow [2023-08-27 08:47:39,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:47:39,598 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 112 flow [2023-08-27 08:47:39,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-27 08:47:39,598 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2023-08-27 08:47:39,598 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 112 flow [2023-08-27 08:47:39,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:39,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:39,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 08:47:39,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:39,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1847618638, now seen corresponding path program 2 times [2023-08-27 08:47:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:39,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507369570] [2023-08-27 08:47:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:39,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:39,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507369570] [2023-08-27 08:47:39,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507369570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:39,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:39,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 08:47:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380599556] [2023-08-27 08:47:39,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:39,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:47:39,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:47:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:47:39,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 336 [2023-08-27 08:47:39,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:39,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 336 [2023-08-27 08:47:39,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:39,711 INFO L124 PetriNetUnfolderBase]: 88/169 cut-off events. [2023-08-27 08:47:39,711 INFO L125 PetriNetUnfolderBase]: For 128/140 co-relation queries the response was YES. [2023-08-27 08:47:39,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 169 events. 88/169 cut-off events. For 128/140 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 520 event pairs, 24 based on Foata normal form. 7/170 useless extension candidates. Maximal degree in co-relation 497. Up to 104 conditions per place. [2023-08-27 08:47:39,712 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 32 selfloop transitions, 4 changer transitions 4/41 dead transitions. [2023-08-27 08:47:39,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 237 flow [2023-08-27 08:47:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:47:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:47:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 580 transitions. [2023-08-27 08:47:39,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2023-08-27 08:47:39,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 580 transitions. [2023-08-27 08:47:39,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 580 transitions. [2023-08-27 08:47:39,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:39,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 580 transitions. [2023-08-27 08:47:39,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,717 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 112 flow. Second operand 4 states and 580 transitions. [2023-08-27 08:47:39,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 237 flow [2023-08-27 08:47:39,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 224 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 08:47:39,718 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 131 flow [2023-08-27 08:47:39,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-27 08:47:39,718 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 11 predicate places. [2023-08-27 08:47:39,718 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 131 flow [2023-08-27 08:47:39,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:39,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:39,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 08:47:39,719 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:39,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:39,719 INFO L85 PathProgramCache]: Analyzing trace with hash 710962238, now seen corresponding path program 1 times [2023-08-27 08:47:39,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:39,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471994460] [2023-08-27 08:47:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:39,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:39,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471994460] [2023-08-27 08:47:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471994460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:39,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:39,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:47:39,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432008331] [2023-08-27 08:47:39,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:47:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:47:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:47:39,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:47:39,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:39,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:47:39,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:39,866 INFO L124 PetriNetUnfolderBase]: 98/194 cut-off events. [2023-08-27 08:47:39,866 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-27 08:47:39,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 194 events. 98/194 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 635 event pairs, 28 based on Foata normal form. 2/195 useless extension candidates. Maximal degree in co-relation 591. Up to 99 conditions per place. [2023-08-27 08:47:39,867 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 37 selfloop transitions, 9 changer transitions 10/56 dead transitions. [2023-08-27 08:47:39,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 340 flow [2023-08-27 08:47:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:47:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:47:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 837 transitions. [2023-08-27 08:47:39,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41517857142857145 [2023-08-27 08:47:39,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 837 transitions. [2023-08-27 08:47:39,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 837 transitions. [2023-08-27 08:47:39,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:39,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 837 transitions. [2023-08-27 08:47:39,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,873 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,873 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 131 flow. Second operand 6 states and 837 transitions. [2023-08-27 08:47:39,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 340 flow [2023-08-27 08:47:39,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:47:39,875 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 182 flow [2023-08-27 08:47:39,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-27 08:47:39,875 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 17 predicate places. [2023-08-27 08:47:39,876 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 182 flow [2023-08-27 08:47:39,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:39,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:39,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 08:47:39,876 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:39,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1845628994, now seen corresponding path program 3 times [2023-08-27 08:47:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529447364] [2023-08-27 08:47:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:39,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529447364] [2023-08-27 08:47:39,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529447364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:39,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:39,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 08:47:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674800527] [2023-08-27 08:47:39,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:39,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:47:39,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:47:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:47:39,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 336 [2023-08-27 08:47:39,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:39,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 336 [2023-08-27 08:47:39,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:39,975 INFO L124 PetriNetUnfolderBase]: 91/169 cut-off events. [2023-08-27 08:47:39,975 INFO L125 PetriNetUnfolderBase]: For 349/353 co-relation queries the response was YES. [2023-08-27 08:47:39,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 169 events. 91/169 cut-off events. For 349/353 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 522 event pairs, 22 based on Foata normal form. 4/167 useless extension candidates. Maximal degree in co-relation 642. Up to 101 conditions per place. [2023-08-27 08:47:39,976 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 30 selfloop transitions, 10 changer transitions 4/46 dead transitions. [2023-08-27 08:47:39,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 328 flow [2023-08-27 08:47:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:47:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:47:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-27 08:47:39,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43080357142857145 [2023-08-27 08:47:39,978 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-27 08:47:39,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-27 08:47:39,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:39,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-27 08:47:39,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,981 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,981 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 182 flow. Second operand 4 states and 579 transitions. [2023-08-27 08:47:39,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 328 flow [2023-08-27 08:47:39,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 309 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 08:47:39,983 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 212 flow [2023-08-27 08:47:39,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-08-27 08:47:39,983 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 18 predicate places. [2023-08-27 08:47:39,983 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 212 flow [2023-08-27 08:47:39,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:39,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:39,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:39,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 08:47:39,984 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:39,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2055749302, now seen corresponding path program 2 times [2023-08-27 08:47:39,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:39,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205248837] [2023-08-27 08:47:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:39,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:40,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205248837] [2023-08-27 08:47:40,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205248837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:40,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:40,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:47:40,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734409989] [2023-08-27 08:47:40,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:40,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:47:40,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:40,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:47:40,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:47:40,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:47:40,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:40,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:47:40,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:40,123 INFO L124 PetriNetUnfolderBase]: 90/160 cut-off events. [2023-08-27 08:47:40,123 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-08-27 08:47:40,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 160 events. 90/160 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 447 event pairs, 2 based on Foata normal form. 6/165 useless extension candidates. Maximal degree in co-relation 643. Up to 82 conditions per place. [2023-08-27 08:47:40,124 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 41 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2023-08-27 08:47:40,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 385 flow [2023-08-27 08:47:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:47:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:47:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 834 transitions. [2023-08-27 08:47:40,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2023-08-27 08:47:40,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 834 transitions. [2023-08-27 08:47:40,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 834 transitions. [2023-08-27 08:47:40,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:40,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 834 transitions. [2023-08-27 08:47:40,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.0) internal successors, (834), 6 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 08:47:40,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,130 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 212 flow. Second operand 6 states and 834 transitions. [2023-08-27 08:47:40,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 385 flow [2023-08-27 08:47:40,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 358 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-27 08:47:40,132 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 242 flow [2023-08-27 08:47:40,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-27 08:47:40,132 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2023-08-27 08:47:40,132 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 242 flow [2023-08-27 08:47:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:40,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:40,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 08:47:40,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:40,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:40,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2031191966, now seen corresponding path program 3 times [2023-08-27 08:47:40,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:40,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374556678] [2023-08-27 08:47:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:40,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:40,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374556678] [2023-08-27 08:47:40,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374556678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:47:40,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:47:40,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:47:40,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841702044] [2023-08-27 08:47:40,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:47:40,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:47:40,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:47:40,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:47:40,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:47:40,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:40,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:47:40,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:40,259 INFO L124 PetriNetUnfolderBase]: 101/187 cut-off events. [2023-08-27 08:47:40,260 INFO L125 PetriNetUnfolderBase]: For 580/580 co-relation queries the response was YES. [2023-08-27 08:47:40,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 187 events. 101/187 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 527 event pairs, 31 based on Foata normal form. 6/192 useless extension candidates. Maximal degree in co-relation 768. Up to 130 conditions per place. [2023-08-27 08:47:40,261 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 43 selfloop transitions, 9 changer transitions 2/54 dead transitions. [2023-08-27 08:47:40,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 433 flow [2023-08-27 08:47:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:47:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:47:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2023-08-27 08:47:40,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2023-08-27 08:47:40,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2023-08-27 08:47:40,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2023-08-27 08:47:40,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:40,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2023-08-27 08:47:40,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,266 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 242 flow. Second operand 5 states and 695 transitions. [2023-08-27 08:47:40,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 433 flow [2023-08-27 08:47:40,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 395 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-27 08:47:40,268 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 264 flow [2023-08-27 08:47:40,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-27 08:47:40,268 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2023-08-27 08:47:40,268 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 264 flow [2023-08-27 08:47:40,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:40,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:40,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 08:47:40,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:40,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1843219210, now seen corresponding path program 4 times [2023-08-27 08:47:40,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:40,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147455683] [2023-08-27 08:47:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:40,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:40,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:40,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147455683] [2023-08-27 08:47:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147455683] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373532667] [2023-08-27 08:47:40,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:47:40,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:40,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:40,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:40,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 08:47:40,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:47:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:47:40,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:47:40,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:40,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373532667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:40,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:40,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-27 08:47:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068570799] [2023-08-27 08:47:40,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:40,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:47:40,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:40,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:47:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:47:40,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:47:40,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 135.57142857142858) internal successors, (949), 7 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:40,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:47:40,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:40,605 INFO L124 PetriNetUnfolderBase]: 116/212 cut-off events. [2023-08-27 08:47:40,605 INFO L125 PetriNetUnfolderBase]: For 719/719 co-relation queries the response was YES. [2023-08-27 08:47:40,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 212 events. 116/212 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 637 event pairs, 28 based on Foata normal form. 6/217 useless extension candidates. Maximal degree in co-relation 942. Up to 133 conditions per place. [2023-08-27 08:47:40,606 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 46 selfloop transitions, 17 changer transitions 2/65 dead transitions. [2023-08-27 08:47:40,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 529 flow [2023-08-27 08:47:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:47:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:47:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 972 transitions. [2023-08-27 08:47:40,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2023-08-27 08:47:40,608 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 972 transitions. [2023-08-27 08:47:40,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 972 transitions. [2023-08-27 08:47:40,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:40,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 972 transitions. [2023-08-27 08:47:40,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.85714285714286) internal successors, (972), 7 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 336.0) internal successors, (2688), 8 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,613 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 336.0) internal successors, (2688), 8 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,613 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 264 flow. Second operand 7 states and 972 transitions. [2023-08-27 08:47:40,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 529 flow [2023-08-27 08:47:40,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 497 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-27 08:47:40,615 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 325 flow [2023-08-27 08:47:40,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-27 08:47:40,615 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 30 predicate places. [2023-08-27 08:47:40,615 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 325 flow [2023-08-27 08:47:40,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.57142857142858) internal successors, (949), 7 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:40,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:40,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:40,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 08:47:40,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:40,821 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:40,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1168251006, now seen corresponding path program 5 times [2023-08-27 08:47:40,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341280942] [2023-08-27 08:47:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:40,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341280942] [2023-08-27 08:47:40,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341280942] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:40,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495229645] [2023-08-27 08:47:40,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:47:40,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:40,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:40,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 08:47:40,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:47:40,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:47:40,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:47:40,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:40,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495229645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:41,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:41,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-27 08:47:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957530039] [2023-08-27 08:47:41,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:41,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:47:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:47:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:47:41,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:47:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 134.75) internal successors, (1078), 8 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:47:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:41,083 INFO L124 PetriNetUnfolderBase]: 110/198 cut-off events. [2023-08-27 08:47:41,083 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2023-08-27 08:47:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 198 events. 110/198 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 560 event pairs, 31 based on Foata normal form. 6/203 useless extension candidates. Maximal degree in co-relation 902. Up to 142 conditions per place. [2023-08-27 08:47:41,085 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 39 selfloop transitions, 14 changer transitions 2/55 dead transitions. [2023-08-27 08:47:41,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 495 flow [2023-08-27 08:47:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:47:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:47:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 696 transitions. [2023-08-27 08:47:41,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-08-27 08:47:41,087 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 696 transitions. [2023-08-27 08:47:41,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 696 transitions. [2023-08-27 08:47:41,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:41,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 696 transitions. [2023-08-27 08:47:41,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:41,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:41,090 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:41,090 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 325 flow. Second operand 5 states and 696 transitions. [2023-08-27 08:47:41,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 495 flow [2023-08-27 08:47:41,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 460 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-27 08:47:41,092 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 327 flow [2023-08-27 08:47:41,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-27 08:47:41,093 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 32 predicate places. [2023-08-27 08:47:41,093 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 327 flow [2023-08-27 08:47:41,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.75) internal successors, (1078), 8 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:41,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:41,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:41,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 08:47:41,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:41,298 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:41,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:41,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2003946126, now seen corresponding path program 1 times [2023-08-27 08:47:41,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:41,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258926724] [2023-08-27 08:47:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:41,365 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 08:47:41,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:41,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258926724] [2023-08-27 08:47:41,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258926724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:41,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181397905] [2023-08-27 08:47:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:41,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:41,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:41,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 08:47:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:41,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 08:47:41,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:41,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:47:41,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:47:41,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:47:41,615 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:47:41,615 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2023-08-27 08:47:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:41,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:43,850 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:43,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-08-27 08:47:43,870 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:43,870 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-08-27 08:47:43,898 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:43,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 104 [2023-08-27 08:47:44,197 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:44,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2023-08-27 08:47:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:44,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181397905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:44,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:44,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2023-08-27 08:47:44,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720610120] [2023-08-27 08:47:44,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:44,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:47:44,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:47:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=180, Unknown=4, NotChecked=0, Total=240 [2023-08-27 08:47:44,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 336 [2023-08-27 08:47:44,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 327 flow. Second operand has 16 states, 16 states have (on average 95.0) internal successors, (1520), 16 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:44,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:44,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 336 [2023-08-27 08:47:44,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:46,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:47:46,929 INFO L124 PetriNetUnfolderBase]: 379/676 cut-off events. [2023-08-27 08:47:46,929 INFO L125 PetriNetUnfolderBase]: For 2228/2278 co-relation queries the response was YES. [2023-08-27 08:47:46,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 676 events. 379/676 cut-off events. For 2228/2278 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2957 event pairs, 16 based on Foata normal form. 71/740 useless extension candidates. Maximal degree in co-relation 2995. Up to 324 conditions per place. [2023-08-27 08:47:46,933 INFO L140 encePairwiseOnDemand]: 327/336 looper letters, 62 selfloop transitions, 40 changer transitions 78/183 dead transitions. [2023-08-27 08:47:46,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 183 transitions, 1531 flow [2023-08-27 08:47:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:47:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:47:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2356 transitions. [2023-08-27 08:47:46,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29216269841269843 [2023-08-27 08:47:46,937 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2356 transitions. [2023-08-27 08:47:46,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2356 transitions. [2023-08-27 08:47:46,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:46,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2356 transitions. [2023-08-27 08:47:46,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 98.16666666666667) internal successors, (2356), 24 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:46,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 336.0) internal successors, (8400), 25 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:46,948 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 336.0) internal successors, (8400), 25 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:46,948 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 327 flow. Second operand 24 states and 2356 transitions. [2023-08-27 08:47:46,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 183 transitions, 1531 flow [2023-08-27 08:47:46,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 183 transitions, 1403 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-27 08:47:46,954 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 636 flow [2023-08-27 08:47:46,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=636, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2023-08-27 08:47:46,954 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 61 predicate places. [2023-08-27 08:47:46,954 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 636 flow [2023-08-27 08:47:46,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 95.0) internal successors, (1520), 16 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:46,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:46,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:46,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 08:47:47,164 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 08:47:47,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:47,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:47,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1371673246, now seen corresponding path program 2 times [2023-08-27 08:47:47,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:47,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246135851] [2023-08-27 08:47:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:47,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:47,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:47,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246135851] [2023-08-27 08:47:47,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246135851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:47,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470648587] [2023-08-27 08:47:47,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:47:47,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:47,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:47,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:47,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 08:47:47,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:47:47,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:47:47,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 08:47:47,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:47,801 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:47:47,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:47:47,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:47:47,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:47:47,962 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:47:47,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2023-08-27 08:47:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:47,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:50,182 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:50,182 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 163 treesize of output 103 [2023-08-27 08:47:50,230 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:50,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 482 [2023-08-27 08:47:50,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:50,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 246 [2023-08-27 08:47:50,343 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:50,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 197 [2023-08-27 08:47:51,601 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 08:47:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:51,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470648587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:51,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:51,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-27 08:47:51,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399120101] [2023-08-27 08:47:51,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:51,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:47:51,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:47:51,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=363, Unknown=8, NotChecked=0, Total=462 [2023-08-27 08:47:51,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 336 [2023-08-27 08:47:51,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 636 flow. Second operand has 22 states, 22 states have (on average 103.9090909090909) internal successors, (2286), 22 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:51,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:51,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 336 [2023-08-27 08:47:51,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:53,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:47:54,080 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* c_~x1~0 4) c_~f~0.offset)) (.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (let ((.cse1 (select |c_#memory_int| c_~f~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< .cse0 0) (= (select .cse1 .cse2) (select .cse1 (+ (* .cse0 4) c_~f~0.offset))) (<= c_~size~0 .cse0)))) (forall ((v_ArrVal_332 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_332) c_~f~0.base))) (let ((.cse5 (select .cse4 .cse3))) (or (= (select .cse4 (+ c_~f~0.offset (* .cse5 4))) (select .cse4 .cse2)) (<= c_~size~0 .cse5) (< .cse5 0))))))) is different from false [2023-08-27 08:47:54,372 INFO L124 PetriNetUnfolderBase]: 396/725 cut-off events. [2023-08-27 08:47:54,372 INFO L125 PetriNetUnfolderBase]: For 4535/4590 co-relation queries the response was YES. [2023-08-27 08:47:54,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3975 conditions, 725 events. 396/725 cut-off events. For 4535/4590 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3271 event pairs, 57 based on Foata normal form. 47/757 useless extension candidates. Maximal degree in co-relation 3941. Up to 350 conditions per place. [2023-08-27 08:47:54,376 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 64 selfloop transitions, 41 changer transitions 36/147 dead transitions. [2023-08-27 08:47:54,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 147 transitions, 1604 flow [2023-08-27 08:47:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:47:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:47:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1720 transitions. [2023-08-27 08:47:54,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31994047619047616 [2023-08-27 08:47:54,380 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1720 transitions. [2023-08-27 08:47:54,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1720 transitions. [2023-08-27 08:47:54,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:54,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1720 transitions. [2023-08-27 08:47:54,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 107.5) internal successors, (1720), 16 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:54,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:54,387 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:54,387 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 636 flow. Second operand 16 states and 1720 transitions. [2023-08-27 08:47:54,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 147 transitions, 1604 flow [2023-08-27 08:47:54,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 147 transitions, 1350 flow, removed 93 selfloop flow, removed 13 redundant places. [2023-08-27 08:47:54,397 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 836 flow [2023-08-27 08:47:54,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=836, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2023-08-27 08:47:54,398 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 60 predicate places. [2023-08-27 08:47:54,398 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 836 flow [2023-08-27 08:47:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 103.9090909090909) internal successors, (2286), 22 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:54,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:54,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:54,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 08:47:54,604 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 08:47:54,605 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:54,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1866760216, now seen corresponding path program 3 times [2023-08-27 08:47:54,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:54,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901384430] [2023-08-27 08:47:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:54,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:55,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901384430] [2023-08-27 08:47:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901384430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186354675] [2023-08-27 08:47:55,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:47:55,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:55,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:55,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:55,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 08:47:55,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:47:55,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:47:55,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 08:47:55,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:55,330 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:55,330 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:47:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:47:55,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:55,403 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:47:55,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:47:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:47:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186354675] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:55,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:55,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 3] total 14 [2023-08-27 08:47:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375481428] [2023-08-27 08:47:55,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:55,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:47:55,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:55,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:47:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:47:55,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 336 [2023-08-27 08:47:55,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 836 flow. Second operand has 16 states, 16 states have (on average 111.4375) internal successors, (1783), 16 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:55,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:55,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 336 [2023-08-27 08:47:55,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:55,814 INFO L124 PetriNetUnfolderBase]: 391/700 cut-off events. [2023-08-27 08:47:55,814 INFO L125 PetriNetUnfolderBase]: For 3519/3571 co-relation queries the response was YES. [2023-08-27 08:47:55,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 700 events. 391/700 cut-off events. For 3519/3571 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3063 event pairs, 57 based on Foata normal form. 29/708 useless extension candidates. Maximal degree in co-relation 3638. Up to 479 conditions per place. [2023-08-27 08:47:55,819 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 98 selfloop transitions, 42 changer transitions 1/147 dead transitions. [2023-08-27 08:47:55,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 147 transitions, 1570 flow [2023-08-27 08:47:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:47:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:47:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1825 transitions. [2023-08-27 08:47:55,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33947172619047616 [2023-08-27 08:47:55,822 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1825 transitions. [2023-08-27 08:47:55,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1825 transitions. [2023-08-27 08:47:55,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:47:55,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1825 transitions. [2023-08-27 08:47:55,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.0625) internal successors, (1825), 16 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:55,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:55,828 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:55,828 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 836 flow. Second operand 16 states and 1825 transitions. [2023-08-27 08:47:55,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 147 transitions, 1570 flow [2023-08-27 08:47:55,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 147 transitions, 1473 flow, removed 45 selfloop flow, removed 5 redundant places. [2023-08-27 08:47:55,841 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 1178 flow [2023-08-27 08:47:55,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1178, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2023-08-27 08:47:55,842 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 68 predicate places. [2023-08-27 08:47:55,842 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 1178 flow [2023-08-27 08:47:55,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 111.4375) internal successors, (1783), 16 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:55,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:47:55,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:47:55,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 08:47:56,046 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 08:47:56,049 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:47:56,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:47:56,049 INFO L85 PathProgramCache]: Analyzing trace with hash 532604980, now seen corresponding path program 4 times [2023-08-27 08:47:56,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:47:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501917019] [2023-08-27 08:47:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:47:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:47:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:47:56,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:56,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501917019] [2023-08-27 08:47:56,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501917019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:56,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252384828] [2023-08-27 08:47:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:47:56,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:56,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:56,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 08:47:56,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:47:56,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:47:56,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:47:56,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:47:56,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-27 08:47:56,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:56,946 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:47:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:56,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:57,010 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_401 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_401) c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)))) is different from false [2023-08-27 08:47:57,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:57,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-08-27 08:47:57,042 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:57,043 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-27 08:47:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-27 08:47:57,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252384828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:57,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:57,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-08-27 08:47:57,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426784240] [2023-08-27 08:47:57,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:57,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:47:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:47:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=313, Unknown=6, NotChecked=36, Total=420 [2023-08-27 08:47:57,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 336 [2023-08-27 08:47:57,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 1178 flow. Second operand has 21 states, 21 states have (on average 103.71428571428571) internal successors, (2178), 21 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:57,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:57,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 336 [2023-08-27 08:47:57,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:59,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:48:01,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:48:03,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:48:05,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:48:05,875 INFO L124 PetriNetUnfolderBase]: 628/1120 cut-off events. [2023-08-27 08:48:05,875 INFO L125 PetriNetUnfolderBase]: For 5320/5394 co-relation queries the response was YES. [2023-08-27 08:48:05,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 1120 events. 628/1120 cut-off events. For 5320/5394 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5495 event pairs, 58 based on Foata normal form. 51/1147 useless extension candidates. Maximal degree in co-relation 5835. Up to 647 conditions per place. [2023-08-27 08:48:05,882 INFO L140 encePairwiseOnDemand]: 327/336 looper letters, 107 selfloop transitions, 83 changer transitions 1/197 dead transitions. [2023-08-27 08:48:05,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 197 transitions, 2281 flow [2023-08-27 08:48:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 08:48:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 08:48:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1510 transitions. [2023-08-27 08:48:05,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210034013605442 [2023-08-27 08:48:05,884 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1510 transitions. [2023-08-27 08:48:05,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1510 transitions. [2023-08-27 08:48:05,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:05,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1510 transitions. [2023-08-27 08:48:05,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 107.85714285714286) internal successors, (1510), 14 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:05,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 336.0) internal successors, (5040), 15 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:05,889 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 336.0) internal successors, (5040), 15 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:05,889 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 1178 flow. Second operand 14 states and 1510 transitions. [2023-08-27 08:48:05,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 197 transitions, 2281 flow [2023-08-27 08:48:05,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 197 transitions, 2118 flow, removed 74 selfloop flow, removed 4 redundant places. [2023-08-27 08:48:05,908 INFO L231 Difference]: Finished difference. Result has 104 places, 157 transitions, 1819 flow [2023-08-27 08:48:05,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1819, PETRI_PLACES=104, PETRI_TRANSITIONS=157} [2023-08-27 08:48:05,908 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 81 predicate places. [2023-08-27 08:48:05,908 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 157 transitions, 1819 flow [2023-08-27 08:48:05,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 103.71428571428571) internal successors, (2178), 21 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:05,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:05,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:05,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:06,115 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 08:48:06,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:06,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:06,115 INFO L85 PathProgramCache]: Analyzing trace with hash 338945104, now seen corresponding path program 5 times [2023-08-27 08:48:06,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:06,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638895612] [2023-08-27 08:48:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:06,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638895612] [2023-08-27 08:48:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638895612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406121971] [2023-08-27 08:48:06,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:48:06,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:06,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:06,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:06,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 08:48:06,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:48:06,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:06,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:06,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:06,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:06,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406121971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:06,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:06,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-27 08:48:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257977425] [2023-08-27 08:48:06,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:06,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:48:06,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:48:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:48:06,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:06,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 157 transitions, 1819 flow. Second operand has 17 states, 17 states have (on average 134.11764705882354) internal successors, (2280), 17 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:06,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:06,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:06,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:07,562 INFO L124 PetriNetUnfolderBase]: 1014/1891 cut-off events. [2023-08-27 08:48:07,563 INFO L125 PetriNetUnfolderBase]: For 11249/11249 co-relation queries the response was YES. [2023-08-27 08:48:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10320 conditions, 1891 events. 1014/1891 cut-off events. For 11249/11249 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11064 event pairs, 98 based on Foata normal form. 36/1926 useless extension candidates. Maximal degree in co-relation 10280. Up to 734 conditions per place. [2023-08-27 08:48:07,574 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 211 selfloop transitions, 136 changer transitions 27/374 dead transitions. [2023-08-27 08:48:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 374 transitions, 4628 flow [2023-08-27 08:48:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:48:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:48:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3166 transitions. [2023-08-27 08:48:07,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40967908902691513 [2023-08-27 08:48:07,577 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3166 transitions. [2023-08-27 08:48:07,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3166 transitions. [2023-08-27 08:48:07,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:07,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3166 transitions. [2023-08-27 08:48:07,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 137.65217391304347) internal successors, (3166), 23 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:07,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 336.0) internal successors, (8064), 24 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:07,585 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 336.0) internal successors, (8064), 24 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:07,585 INFO L175 Difference]: Start difference. First operand has 104 places, 157 transitions, 1819 flow. Second operand 23 states and 3166 transitions. [2023-08-27 08:48:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 374 transitions, 4628 flow [2023-08-27 08:48:07,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 374 transitions, 4279 flow, removed 163 selfloop flow, removed 5 redundant places. [2023-08-27 08:48:07,614 INFO L231 Difference]: Finished difference. Result has 133 places, 243 transitions, 3110 flow [2023-08-27 08:48:07,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3110, PETRI_PLACES=133, PETRI_TRANSITIONS=243} [2023-08-27 08:48:07,615 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 110 predicate places. [2023-08-27 08:48:07,615 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 243 transitions, 3110 flow [2023-08-27 08:48:07,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 134.11764705882354) internal successors, (2280), 17 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:07,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:07,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:07,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:07,816 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 08:48:07,816 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:07,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash -990475330, now seen corresponding path program 6 times [2023-08-27 08:48:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565970240] [2023-08-27 08:48:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:07,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565970240] [2023-08-27 08:48:07,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565970240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274331514] [2023-08-27 08:48:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:48:07,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:07,946 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:07,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 08:48:08,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:48:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:08,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:08,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:08,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:08,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274331514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:08,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:08,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-27 08:48:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429002776] [2023-08-27 08:48:08,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:08,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 08:48:08,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 08:48:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:48:08,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:08,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 243 transitions, 3110 flow. Second operand has 15 states, 15 states have (on average 134.4) internal successors, (2016), 15 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:08,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:08,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:08,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:08,914 INFO L124 PetriNetUnfolderBase]: 987/1854 cut-off events. [2023-08-27 08:48:08,915 INFO L125 PetriNetUnfolderBase]: For 13104/13104 co-relation queries the response was YES. [2023-08-27 08:48:08,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11443 conditions, 1854 events. 987/1854 cut-off events. For 13104/13104 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10636 event pairs, 102 based on Foata normal form. 34/1887 useless extension candidates. Maximal degree in co-relation 11391. Up to 737 conditions per place. [2023-08-27 08:48:08,929 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 217 selfloop transitions, 108 changer transitions 8/333 dead transitions. [2023-08-27 08:48:08,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 333 transitions, 4753 flow [2023-08-27 08:48:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 08:48:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 08:48:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1539 transitions. [2023-08-27 08:48:08,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163961038961039 [2023-08-27 08:48:08,931 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1539 transitions. [2023-08-27 08:48:08,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1539 transitions. [2023-08-27 08:48:08,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:08,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1539 transitions. [2023-08-27 08:48:08,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 139.9090909090909) internal successors, (1539), 11 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:08,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 336.0) internal successors, (4032), 12 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:08,937 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 336.0) internal successors, (4032), 12 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:08,937 INFO L175 Difference]: Start difference. First operand has 133 places, 243 transitions, 3110 flow. Second operand 11 states and 1539 transitions. [2023-08-27 08:48:08,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 333 transitions, 4753 flow [2023-08-27 08:48:08,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 333 transitions, 4418 flow, removed 136 selfloop flow, removed 4 redundant places. [2023-08-27 08:48:08,985 INFO L231 Difference]: Finished difference. Result has 142 places, 252 transitions, 3304 flow [2023-08-27 08:48:08,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3304, PETRI_PLACES=142, PETRI_TRANSITIONS=252} [2023-08-27 08:48:08,986 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 119 predicate places. [2023-08-27 08:48:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 252 transitions, 3304 flow [2023-08-27 08:48:08,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.4) internal successors, (2016), 15 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:08,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:08,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:08,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:09,190 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 08:48:09,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:09,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash -589713888, now seen corresponding path program 7 times [2023-08-27 08:48:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:09,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12766977] [2023-08-27 08:48:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:09,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:09,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12766977] [2023-08-27 08:48:09,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12766977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:09,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484288483] [2023-08-27 08:48:09,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:48:09,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:09,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:09,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:09,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 08:48:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:09,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:09,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:09,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484288483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:09,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:09,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 08:48:09,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986178226] [2023-08-27 08:48:09,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:09,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:48:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:48:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:48:09,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:09,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 252 transitions, 3304 flow. Second operand has 18 states, 18 states have (on average 133.72222222222223) internal successors, (2407), 18 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:09,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:09,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:09,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:10,416 INFO L124 PetriNetUnfolderBase]: 950/1775 cut-off events. [2023-08-27 08:48:10,416 INFO L125 PetriNetUnfolderBase]: For 15388/15388 co-relation queries the response was YES. [2023-08-27 08:48:10,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11184 conditions, 1775 events. 950/1775 cut-off events. For 15388/15388 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10123 event pairs, 185 based on Foata normal form. 88/1862 useless extension candidates. Maximal degree in co-relation 11129. Up to 859 conditions per place. [2023-08-27 08:48:10,428 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 161 selfloop transitions, 207 changer transitions 6/374 dead transitions. [2023-08-27 08:48:10,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 374 transitions, 5426 flow [2023-08-27 08:48:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:48:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:48:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2768 transitions. [2023-08-27 08:48:10,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2023-08-27 08:48:10,430 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2768 transitions. [2023-08-27 08:48:10,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2768 transitions. [2023-08-27 08:48:10,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:10,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2768 transitions. [2023-08-27 08:48:10,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 138.4) internal successors, (2768), 20 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:10,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 336.0) internal successors, (7056), 21 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:10,436 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 336.0) internal successors, (7056), 21 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:10,436 INFO L175 Difference]: Start difference. First operand has 142 places, 252 transitions, 3304 flow. Second operand 20 states and 2768 transitions. [2023-08-27 08:48:10,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 374 transitions, 5426 flow [2023-08-27 08:48:10,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 374 transitions, 4982 flow, removed 145 selfloop flow, removed 8 redundant places. [2023-08-27 08:48:10,487 INFO L231 Difference]: Finished difference. Result has 159 places, 308 transitions, 4610 flow [2023-08-27 08:48:10,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4610, PETRI_PLACES=159, PETRI_TRANSITIONS=308} [2023-08-27 08:48:10,487 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 136 predicate places. [2023-08-27 08:48:10,487 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 308 transitions, 4610 flow [2023-08-27 08:48:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.72222222222223) internal successors, (2407), 18 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:10,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:10,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:10,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-27 08:48:10,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-27 08:48:10,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:10,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1385116240, now seen corresponding path program 8 times [2023-08-27 08:48:10,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:10,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552372454] [2023-08-27 08:48:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:10,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:10,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552372454] [2023-08-27 08:48:10,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552372454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:10,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427247648] [2023-08-27 08:48:10,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:48:10,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:10,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:10,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 08:48:10,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:48:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:10,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:10,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:10,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:11,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427247648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:11,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:11,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 08:48:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473065082] [2023-08-27 08:48:11,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:11,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:48:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:48:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:48:11,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:11,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 308 transitions, 4610 flow. Second operand has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:11,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:11,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:11,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:12,332 INFO L124 PetriNetUnfolderBase]: 950/1867 cut-off events. [2023-08-27 08:48:12,333 INFO L125 PetriNetUnfolderBase]: For 14965/14965 co-relation queries the response was YES. [2023-08-27 08:48:12,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11893 conditions, 1867 events. 950/1867 cut-off events. For 14965/14965 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11302 event pairs, 122 based on Foata normal form. 24/1890 useless extension candidates. Maximal degree in co-relation 11831. Up to 753 conditions per place. [2023-08-27 08:48:12,345 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 189 selfloop transitions, 213 changer transitions 11/413 dead transitions. [2023-08-27 08:48:12,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 413 transitions, 6084 flow [2023-08-27 08:48:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 08:48:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 08:48:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4245 transitions. [2023-08-27 08:48:12,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075460829493088 [2023-08-27 08:48:12,348 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4245 transitions. [2023-08-27 08:48:12,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4245 transitions. [2023-08-27 08:48:12,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:12,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4245 transitions. [2023-08-27 08:48:12,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 136.93548387096774) internal successors, (4245), 31 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:12,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 336.0) internal successors, (10752), 32 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:12,357 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 336.0) internal successors, (10752), 32 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:12,357 INFO L175 Difference]: Start difference. First operand has 159 places, 308 transitions, 4610 flow. Second operand 31 states and 4245 transitions. [2023-08-27 08:48:12,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 413 transitions, 6084 flow [2023-08-27 08:48:12,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 413 transitions, 5508 flow, removed 219 selfloop flow, removed 4 redundant places. [2023-08-27 08:48:12,422 INFO L231 Difference]: Finished difference. Result has 189 places, 320 transitions, 4667 flow [2023-08-27 08:48:12,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4667, PETRI_PLACES=189, PETRI_TRANSITIONS=320} [2023-08-27 08:48:12,422 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 166 predicate places. [2023-08-27 08:48:12,422 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 320 transitions, 4667 flow [2023-08-27 08:48:12,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:12,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:12,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:12,429 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 08:48:12,627 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 08:48:12,628 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:12,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1733165680, now seen corresponding path program 9 times [2023-08-27 08:48:12,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:12,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141975567] [2023-08-27 08:48:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:12,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141975567] [2023-08-27 08:48:12,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141975567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261950940] [2023-08-27 08:48:12,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:48:12,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:12,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:12,799 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:12,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 08:48:12,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:48:12,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:12,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:12,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:12,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:13,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261950940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:13,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:13,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-27 08:48:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427910768] [2023-08-27 08:48:13,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:13,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:48:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:48:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:48:13,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:13,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 320 transitions, 4667 flow. Second operand has 17 states, 17 states have (on average 133.94117647058823) internal successors, (2277), 17 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:13,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:13,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:13,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:15,027 INFO L124 PetriNetUnfolderBase]: 1134/2256 cut-off events. [2023-08-27 08:48:15,027 INFO L125 PetriNetUnfolderBase]: For 17786/17786 co-relation queries the response was YES. [2023-08-27 08:48:15,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14718 conditions, 2256 events. 1134/2256 cut-off events. For 17786/17786 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14547 event pairs, 141 based on Foata normal form. 40/2295 useless extension candidates. Maximal degree in co-relation 14653. Up to 935 conditions per place. [2023-08-27 08:48:15,043 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 274 selfloop transitions, 267 changer transitions 4/545 dead transitions. [2023-08-27 08:48:15,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 545 transitions, 8042 flow [2023-08-27 08:48:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 08:48:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 08:48:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6033 transitions. [2023-08-27 08:48:15,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080762987012987 [2023-08-27 08:48:15,056 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6033 transitions. [2023-08-27 08:48:15,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6033 transitions. [2023-08-27 08:48:15,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:15,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6033 transitions. [2023-08-27 08:48:15,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 137.11363636363637) internal successors, (6033), 44 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:15,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 336.0) internal successors, (15120), 45 states have internal predecessors, (15120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:15,072 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 336.0) internal successors, (15120), 45 states have internal predecessors, (15120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:15,072 INFO L175 Difference]: Start difference. First operand has 189 places, 320 transitions, 4667 flow. Second operand 44 states and 6033 transitions. [2023-08-27 08:48:15,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 545 transitions, 8042 flow [2023-08-27 08:48:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 545 transitions, 7451 flow, removed 81 selfloop flow, removed 16 redundant places. [2023-08-27 08:48:15,146 INFO L231 Difference]: Finished difference. Result has 225 places, 414 transitions, 6312 flow [2023-08-27 08:48:15,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6312, PETRI_PLACES=225, PETRI_TRANSITIONS=414} [2023-08-27 08:48:15,147 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 202 predicate places. [2023-08-27 08:48:15,147 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 414 transitions, 6312 flow [2023-08-27 08:48:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.94117647058823) internal successors, (2277), 17 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:15,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:15,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:15,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:15,347 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 08:48:15,348 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:15,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -136982718, now seen corresponding path program 10 times [2023-08-27 08:48:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023379581] [2023-08-27 08:48:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:15,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023379581] [2023-08-27 08:48:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023379581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103525760] [2023-08-27 08:48:15,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:48:15,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:15,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:15,504 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:15,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 08:48:15,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:48:15,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:15,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:15,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:15,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:15,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103525760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:15,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:15,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 08:48:15,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961566091] [2023-08-27 08:48:15,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:15,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:48:15,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:48:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:48:15,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:15,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 414 transitions, 6312 flow. Second operand has 17 states, 17 states have (on average 133.76470588235293) internal successors, (2274), 17 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:15,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:15,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:15,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:17,108 INFO L124 PetriNetUnfolderBase]: 1135/2240 cut-off events. [2023-08-27 08:48:17,108 INFO L125 PetriNetUnfolderBase]: For 16333/16333 co-relation queries the response was YES. [2023-08-27 08:48:17,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15219 conditions, 2240 events. 1135/2240 cut-off events. For 16333/16333 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14193 event pairs, 223 based on Foata normal form. 12/2251 useless extension candidates. Maximal degree in co-relation 15146. Up to 1131 conditions per place. [2023-08-27 08:48:17,125 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 255 selfloop transitions, 242 changer transitions 0/497 dead transitions. [2023-08-27 08:48:17,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 497 transitions, 7926 flow [2023-08-27 08:48:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 08:48:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 08:48:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3583 transitions. [2023-08-27 08:48:17,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101419413919414 [2023-08-27 08:48:17,131 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3583 transitions. [2023-08-27 08:48:17,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3583 transitions. [2023-08-27 08:48:17,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:17,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3583 transitions. [2023-08-27 08:48:17,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 137.80769230769232) internal successors, (3583), 26 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:17,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 336.0) internal successors, (9072), 27 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:17,138 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 336.0) internal successors, (9072), 27 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:17,139 INFO L175 Difference]: Start difference. First operand has 225 places, 414 transitions, 6312 flow. Second operand 26 states and 3583 transitions. [2023-08-27 08:48:17,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 497 transitions, 7926 flow [2023-08-27 08:48:17,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 497 transitions, 7256 flow, removed 213 selfloop flow, removed 10 redundant places. [2023-08-27 08:48:17,264 INFO L231 Difference]: Finished difference. Result has 244 places, 420 transitions, 6375 flow [2023-08-27 08:48:17,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6375, PETRI_PLACES=244, PETRI_TRANSITIONS=420} [2023-08-27 08:48:17,265 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 221 predicate places. [2023-08-27 08:48:17,265 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 420 transitions, 6375 flow [2023-08-27 08:48:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.76470588235293) internal successors, (2274), 17 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:17,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:17,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:17,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:17,468 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 08:48:17,469 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:17,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:17,469 INFO L85 PathProgramCache]: Analyzing trace with hash 693591536, now seen corresponding path program 11 times [2023-08-27 08:48:17,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:17,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449817251] [2023-08-27 08:48:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:17,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:17,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449817251] [2023-08-27 08:48:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449817251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:17,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001042679] [2023-08-27 08:48:17,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:48:17,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:17,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:17,593 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:17,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 08:48:17,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:48:17,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:17,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:17,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:17,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:17,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001042679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:17,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 08:48:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232977363] [2023-08-27 08:48:17,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:17,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:48:17,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:48:17,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:48:17,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:17,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 420 transitions, 6375 flow. Second operand has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:17,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:17,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:19,158 INFO L124 PetriNetUnfolderBase]: 1215/2371 cut-off events. [2023-08-27 08:48:19,158 INFO L125 PetriNetUnfolderBase]: For 16355/16355 co-relation queries the response was YES. [2023-08-27 08:48:19,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16300 conditions, 2371 events. 1215/2371 cut-off events. For 16355/16355 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15112 event pairs, 264 based on Foata normal form. 18/2388 useless extension candidates. Maximal degree in co-relation 16226. Up to 1417 conditions per place. [2023-08-27 08:48:19,174 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 298 selfloop transitions, 236 changer transitions 0/534 dead transitions. [2023-08-27 08:48:19,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 534 transitions, 8784 flow [2023-08-27 08:48:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 08:48:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 08:48:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3833 transitions. [2023-08-27 08:48:19,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40741921768707484 [2023-08-27 08:48:19,178 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3833 transitions. [2023-08-27 08:48:19,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3833 transitions. [2023-08-27 08:48:19,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:19,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3833 transitions. [2023-08-27 08:48:19,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 136.89285714285714) internal successors, (3833), 28 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:19,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 336.0) internal successors, (9744), 29 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:19,185 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 336.0) internal successors, (9744), 29 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:19,185 INFO L175 Difference]: Start difference. First operand has 244 places, 420 transitions, 6375 flow. Second operand 28 states and 3833 transitions. [2023-08-27 08:48:19,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 534 transitions, 8784 flow [2023-08-27 08:48:19,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 534 transitions, 8416 flow, removed 31 selfloop flow, removed 19 redundant places. [2023-08-27 08:48:19,280 INFO L231 Difference]: Finished difference. Result has 261 places, 470 transitions, 7582 flow [2023-08-27 08:48:19,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7582, PETRI_PLACES=261, PETRI_TRANSITIONS=470} [2023-08-27 08:48:19,280 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 238 predicate places. [2023-08-27 08:48:19,280 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 470 transitions, 7582 flow [2023-08-27 08:48:19,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:19,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:19,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:19,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:19,481 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 08:48:19,481 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:19,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:19,481 INFO L85 PathProgramCache]: Analyzing trace with hash -362203568, now seen corresponding path program 12 times [2023-08-27 08:48:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:19,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280278800] [2023-08-27 08:48:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:19,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:19,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280278800] [2023-08-27 08:48:19,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280278800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138594619] [2023-08-27 08:48:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:48:19,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:19,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:19,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 08:48:19,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:48:19,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:19,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:19,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:19,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:19,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138594619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:19,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 08:48:19,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331320312] [2023-08-27 08:48:19,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:19,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:48:19,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:48:19,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:48:19,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:19,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 470 transitions, 7582 flow. Second operand has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:19,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:19,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:19,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:23,265 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 [] [2023-08-27 08:48:25,756 INFO L124 PetriNetUnfolderBase]: 1740/3520 cut-off events. [2023-08-27 08:48:25,756 INFO L125 PetriNetUnfolderBase]: For 31053/31053 co-relation queries the response was YES. [2023-08-27 08:48:25,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25220 conditions, 3520 events. 1740/3520 cut-off events. For 31053/31053 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 25421 event pairs, 195 based on Foata normal form. 66/3585 useless extension candidates. Maximal degree in co-relation 25139. Up to 1496 conditions per place. [2023-08-27 08:48:25,782 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 423 selfloop transitions, 421 changer transitions 24/868 dead transitions. [2023-08-27 08:48:25,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 868 transitions, 14837 flow [2023-08-27 08:48:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-27 08:48:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-27 08:48:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7112 transitions. [2023-08-27 08:48:25,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2023-08-27 08:48:25,788 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7112 transitions. [2023-08-27 08:48:25,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7112 transitions. [2023-08-27 08:48:25,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:25,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7112 transitions. [2023-08-27 08:48:25,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 136.76923076923077) internal successors, (7112), 52 states have internal predecessors, (7112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:25,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 336.0) internal successors, (17808), 53 states have internal predecessors, (17808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:25,802 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 336.0) internal successors, (17808), 53 states have internal predecessors, (17808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:25,802 INFO L175 Difference]: Start difference. First operand has 261 places, 470 transitions, 7582 flow. Second operand 52 states and 7112 transitions. [2023-08-27 08:48:25,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 868 transitions, 14837 flow [2023-08-27 08:48:26,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 868 transitions, 14323 flow, removed 106 selfloop flow, removed 10 redundant places. [2023-08-27 08:48:26,012 INFO L231 Difference]: Finished difference. Result has 322 places, 680 transitions, 12343 flow [2023-08-27 08:48:26,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=7245, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12343, PETRI_PLACES=322, PETRI_TRANSITIONS=680} [2023-08-27 08:48:26,013 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 299 predicate places. [2023-08-27 08:48:26,013 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 680 transitions, 12343 flow [2023-08-27 08:48:26,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:26,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:26,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:26,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:26,214 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 08:48:26,216 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:26,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2034909700, now seen corresponding path program 13 times [2023-08-27 08:48:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:26,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999127259] [2023-08-27 08:48:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:26,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:26,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:26,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999127259] [2023-08-27 08:48:26,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999127259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:26,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711748749] [2023-08-27 08:48:26,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:48:26,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:26,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:26,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:26,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 08:48:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:26,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:26,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:26,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:26,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711748749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:26,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:26,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-27 08:48:26,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019481204] [2023-08-27 08:48:26,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:26,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:48:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:48:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:48:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:26,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 680 transitions, 12343 flow. Second operand has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:26,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:26,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:26,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:36,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 08:48:37,671 INFO L124 PetriNetUnfolderBase]: 1950/4005 cut-off events. [2023-08-27 08:48:37,671 INFO L125 PetriNetUnfolderBase]: For 43096/43096 co-relation queries the response was YES. [2023-08-27 08:48:37,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31439 conditions, 4005 events. 1950/4005 cut-off events. For 43096/43096 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29891 event pairs, 320 based on Foata normal form. 56/4060 useless extension candidates. Maximal degree in co-relation 31338. Up to 1672 conditions per place. [2023-08-27 08:48:37,704 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 468 selfloop transitions, 455 changer transitions 1/924 dead transitions. [2023-08-27 08:48:37,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 924 transitions, 17891 flow [2023-08-27 08:48:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 08:48:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 08:48:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4806 transitions. [2023-08-27 08:48:37,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086734693877551 [2023-08-27 08:48:37,708 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4806 transitions. [2023-08-27 08:48:37,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4806 transitions. [2023-08-27 08:48:37,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:37,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4806 transitions. [2023-08-27 08:48:37,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 137.31428571428572) internal successors, (4806), 35 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:37,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 336.0) internal successors, (12096), 36 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:37,717 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 336.0) internal successors, (12096), 36 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:37,717 INFO L175 Difference]: Start difference. First operand has 322 places, 680 transitions, 12343 flow. Second operand 35 states and 4806 transitions. [2023-08-27 08:48:37,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 924 transitions, 17891 flow [2023-08-27 08:48:38,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 924 transitions, 16800 flow, removed 410 selfloop flow, removed 14 redundant places. [2023-08-27 08:48:38,175 INFO L231 Difference]: Finished difference. Result has 346 places, 790 transitions, 15037 flow [2023-08-27 08:48:38,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=11463, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15037, PETRI_PLACES=346, PETRI_TRANSITIONS=790} [2023-08-27 08:48:38,176 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 323 predicate places. [2023-08-27 08:48:38,176 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 790 transitions, 15037 flow [2023-08-27 08:48:38,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:38,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:38,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:38,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:38,376 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 08:48:38,377 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:38,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash -521738658, now seen corresponding path program 14 times [2023-08-27 08:48:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:38,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018879522] [2023-08-27 08:48:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:38,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018879522] [2023-08-27 08:48:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018879522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176223232] [2023-08-27 08:48:38,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:48:38,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:38,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:38,504 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:38,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 08:48:38,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:48:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:38,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:38,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:38,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176223232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:38,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:38,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 08:48:38,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505942430] [2023-08-27 08:48:38,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:38,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:48:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:48:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:48:38,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:38,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 790 transitions, 15037 flow. Second operand has 18 states, 18 states have (on average 133.72222222222223) internal successors, (2407), 18 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:38,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:38,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:38,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:42,855 INFO L124 PetriNetUnfolderBase]: 2336/4751 cut-off events. [2023-08-27 08:48:42,855 INFO L125 PetriNetUnfolderBase]: For 61073/61073 co-relation queries the response was YES. [2023-08-27 08:48:42,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39993 conditions, 4751 events. 2336/4751 cut-off events. For 61073/61073 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36482 event pairs, 517 based on Foata normal form. 78/4828 useless extension candidates. Maximal degree in co-relation 39886. Up to 2834 conditions per place. [2023-08-27 08:48:42,899 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 595 selfloop transitions, 506 changer transitions 0/1101 dead transitions. [2023-08-27 08:48:42,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1101 transitions, 22924 flow [2023-08-27 08:48:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 08:48:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 08:48:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5865 transitions. [2023-08-27 08:48:42,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059385382059801 [2023-08-27 08:48:42,904 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5865 transitions. [2023-08-27 08:48:42,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5865 transitions. [2023-08-27 08:48:42,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:42,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5865 transitions. [2023-08-27 08:48:42,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 136.3953488372093) internal successors, (5865), 43 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:42,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 336.0) internal successors, (14784), 44 states have internal predecessors, (14784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:42,915 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 336.0) internal successors, (14784), 44 states have internal predecessors, (14784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:42,915 INFO L175 Difference]: Start difference. First operand has 346 places, 790 transitions, 15037 flow. Second operand 43 states and 5865 transitions. [2023-08-27 08:48:42,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1101 transitions, 22924 flow [2023-08-27 08:48:43,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1101 transitions, 21851 flow, removed 441 selfloop flow, removed 18 redundant places. [2023-08-27 08:48:43,602 INFO L231 Difference]: Finished difference. Result has 386 places, 980 transitions, 20101 flow [2023-08-27 08:48:43,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=14375, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=20101, PETRI_PLACES=386, PETRI_TRANSITIONS=980} [2023-08-27 08:48:43,602 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 363 predicate places. [2023-08-27 08:48:43,603 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 980 transitions, 20101 flow [2023-08-27 08:48:43,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.72222222222223) internal successors, (2407), 18 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:43,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:43,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:43,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:43,807 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 08:48:43,807 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:43,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -153187666, now seen corresponding path program 15 times [2023-08-27 08:48:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:43,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872953115] [2023-08-27 08:48:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:43,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:43,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872953115] [2023-08-27 08:48:43,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872953115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:43,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357809279] [2023-08-27 08:48:43,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:48:43,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:43,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:43,947 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:43,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 08:48:44,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 08:48:44,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:44,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:44,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:44,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:44,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357809279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:44,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:44,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 08:48:44,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252558580] [2023-08-27 08:48:44,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:48:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:44,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:48:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:48:44,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:44,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 980 transitions, 20101 flow. Second operand has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:44,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:44,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:47,706 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 [] [2023-08-27 08:48:52,381 INFO L124 PetriNetUnfolderBase]: 3773/7860 cut-off events. [2023-08-27 08:48:52,381 INFO L125 PetriNetUnfolderBase]: For 127838/127838 co-relation queries the response was YES. [2023-08-27 08:48:52,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69745 conditions, 7860 events. 3773/7860 cut-off events. For 127838/127838 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 67781 event pairs, 84 based on Foata normal form. 80/7939 useless extension candidates. Maximal degree in co-relation 69622. Up to 3387 conditions per place. [2023-08-27 08:48:52,461 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 785 selfloop transitions, 1034 changer transitions 43/1862 dead transitions. [2023-08-27 08:48:52,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1862 transitions, 40888 flow [2023-08-27 08:48:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-27 08:48:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-27 08:48:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6735 transitions. [2023-08-27 08:48:52,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090743440233236 [2023-08-27 08:48:52,466 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6735 transitions. [2023-08-27 08:48:52,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6735 transitions. [2023-08-27 08:48:52,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:52,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6735 transitions. [2023-08-27 08:48:52,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 137.44897959183675) internal successors, (6735), 49 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:52,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 336.0) internal successors, (16800), 50 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:52,484 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 336.0) internal successors, (16800), 50 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:52,484 INFO L175 Difference]: Start difference. First operand has 386 places, 980 transitions, 20101 flow. Second operand 49 states and 6735 transitions. [2023-08-27 08:48:52,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1862 transitions, 40888 flow [2023-08-27 08:48:54,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1862 transitions, 40158 flow, removed 280 selfloop flow, removed 12 redundant places. [2023-08-27 08:48:54,541 INFO L231 Difference]: Finished difference. Result has 444 places, 1531 transitions, 35366 flow [2023-08-27 08:48:54,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=19539, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=35366, PETRI_PLACES=444, PETRI_TRANSITIONS=1531} [2023-08-27 08:48:54,542 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 421 predicate places. [2023-08-27 08:48:54,542 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1531 transitions, 35366 flow [2023-08-27 08:48:54,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:54,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:54,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:54,547 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 08:48:54,747 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 08:48:54,747 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:48:54,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:54,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1775384450, now seen corresponding path program 16 times [2023-08-27 08:48:54,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:54,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58816519] [2023-08-27 08:48:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:54,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:54,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:54,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58816519] [2023-08-27 08:48:54,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58816519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:54,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201811573] [2023-08-27 08:48:54,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:48:54,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:54,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:54,910 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:54,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 08:48:54,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:48:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:54,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:48:54,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:55,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:55,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201811573] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:55,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:55,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 08:48:55,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783928945] [2023-08-27 08:48:55,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:55,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 08:48:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 08:48:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-27 08:48:55,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:48:55,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1531 transitions, 35366 flow. Second operand has 19 states, 19 states have (on average 133.68421052631578) internal successors, (2540), 19 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:55,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:55,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:48:55,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:58,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 08:49:01,949 INFO L124 PetriNetUnfolderBase]: 3967/8452 cut-off events. [2023-08-27 08:49:01,949 INFO L125 PetriNetUnfolderBase]: For 152753/152753 co-relation queries the response was YES. [2023-08-27 08:49:02,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81007 conditions, 8452 events. 3967/8452 cut-off events. For 152753/152753 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 75306 event pairs, 94 based on Foata normal form. 32/8483 useless extension candidates. Maximal degree in co-relation 80865. Up to 3591 conditions per place. [2023-08-27 08:49:02,047 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 1131 selfloop transitions, 757 changer transitions 9/1897 dead transitions. [2023-08-27 08:49:02,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1897 transitions, 45959 flow [2023-08-27 08:49:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:49:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:49:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4692 transitions. [2023-08-27 08:49:02,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-08-27 08:49:02,051 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4692 transitions. [2023-08-27 08:49:02,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4692 transitions. [2023-08-27 08:49:02,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:49:02,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4692 transitions. [2023-08-27 08:49:02,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 138.0) internal successors, (4692), 34 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:02,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 336.0) internal successors, (11760), 35 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:02,060 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 336.0) internal successors, (11760), 35 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:02,060 INFO L175 Difference]: Start difference. First operand has 444 places, 1531 transitions, 35366 flow. Second operand 34 states and 4692 transitions. [2023-08-27 08:49:02,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1897 transitions, 45959 flow [2023-08-27 08:49:05,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1897 transitions, 44260 flow, removed 734 selfloop flow, removed 7 redundant places. [2023-08-27 08:49:05,298 INFO L231 Difference]: Finished difference. Result has 479 places, 1676 transitions, 39791 flow [2023-08-27 08:49:05,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=33883, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=39791, PETRI_PLACES=479, PETRI_TRANSITIONS=1676} [2023-08-27 08:49:05,299 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 456 predicate places. [2023-08-27 08:49:05,299 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1676 transitions, 39791 flow [2023-08-27 08:49:05,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.68421052631578) internal successors, (2540), 19 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:05,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:49:05,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:49:05,305 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 08:49:05,503 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 08:49:05,504 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:49:05,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:49:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1689008592, now seen corresponding path program 17 times [2023-08-27 08:49:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:49:05,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285950254] [2023-08-27 08:49:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:49:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:49:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:49:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:49:05,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:49:05,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285950254] [2023-08-27 08:49:05,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285950254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:49:05,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52473193] [2023-08-27 08:49:05,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:49:05,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:49:05,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:49:05,657 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:49:05,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 08:49:05,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:49:05,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:49:05,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:49:05,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:49:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:49:05,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:49:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:49:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52473193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:49:05,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:49:05,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 08:49:05,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795037724] [2023-08-27 08:49:05,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:49:05,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 08:49:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:49:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 08:49:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-27 08:49:05,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:49:05,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1676 transitions, 39791 flow. Second operand has 19 states, 19 states have (on average 133.78947368421052) internal successors, (2542), 19 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:05,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:49:05,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:49:05,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:49:13,921 INFO L124 PetriNetUnfolderBase]: 4397/9310 cut-off events. [2023-08-27 08:49:13,922 INFO L125 PetriNetUnfolderBase]: For 193732/193732 co-relation queries the response was YES. [2023-08-27 08:49:14,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92965 conditions, 9310 events. 4397/9310 cut-off events. For 193732/193732 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 84003 event pairs, 128 based on Foata normal form. 56/9365 useless extension candidates. Maximal degree in co-relation 92816. Up to 4490 conditions per place. [2023-08-27 08:49:14,032 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 1412 selfloop transitions, 680 changer transitions 4/2096 dead transitions. [2023-08-27 08:49:14,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 2096 transitions, 53465 flow [2023-08-27 08:49:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 08:49:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 08:49:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6017 transitions. [2023-08-27 08:49:14,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069940476190476 [2023-08-27 08:49:14,038 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6017 transitions. [2023-08-27 08:49:14,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6017 transitions. [2023-08-27 08:49:14,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:49:14,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6017 transitions. [2023-08-27 08:49:14,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 136.75) internal successors, (6017), 44 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:14,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 336.0) internal successors, (15120), 45 states have internal predecessors, (15120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:14,050 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 336.0) internal successors, (15120), 45 states have internal predecessors, (15120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:14,050 INFO L175 Difference]: Start difference. First operand has 479 places, 1676 transitions, 39791 flow. Second operand 44 states and 6017 transitions. [2023-08-27 08:49:14,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 2096 transitions, 53465 flow [2023-08-27 08:49:18,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 2096 transitions, 52671 flow, removed 200 selfloop flow, removed 14 redundant places. [2023-08-27 08:49:18,536 INFO L231 Difference]: Finished difference. Result has 523 places, 1896 transitions, 47673 flow [2023-08-27 08:49:18,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=38961, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1093, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=47673, PETRI_PLACES=523, PETRI_TRANSITIONS=1896} [2023-08-27 08:49:18,538 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 500 predicate places. [2023-08-27 08:49:18,538 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1896 transitions, 47673 flow [2023-08-27 08:49:18,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.78947368421052) internal successors, (2542), 19 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:18,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:49:18,538 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:49:18,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 08:49:18,742 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 08:49:18,742 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:49:18,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:49:18,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1964614746, now seen corresponding path program 18 times [2023-08-27 08:49:18,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:49:18,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096622521] [2023-08-27 08:49:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:49:18,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:49:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:49:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:49:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:49:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096622521] [2023-08-27 08:49:19,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096622521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:49:19,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900051841] [2023-08-27 08:49:19,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:49:19,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:49:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:49:19,473 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:49:19,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 08:49:19,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:49:19,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:49:19,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:49:19,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:49:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:49:19,723 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:49:19,775 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:49:19,775 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:49:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:49:19,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:49:19,820 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_886 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_886) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))))) is different from false [2023-08-27 08:49:19,843 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:49:19,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 08:49:19,857 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:49:19,857 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-27 08:49:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:49:19,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900051841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:49:19,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:49:19,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2023-08-27 08:49:19,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198361205] [2023-08-27 08:49:19,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:49:19,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:49:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:49:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:49:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=463, Unknown=1, NotChecked=44, Total=600 [2023-08-27 08:49:19,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 336 [2023-08-27 08:49:19,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1896 transitions, 47673 flow. Second operand has 25 states, 25 states have (on average 103.76) internal successors, (2594), 25 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:19,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:49:19,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 336 [2023-08-27 08:49:19,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:49:25,159 INFO L124 PetriNetUnfolderBase]: 4391/9343 cut-off events. [2023-08-27 08:49:25,159 INFO L125 PetriNetUnfolderBase]: For 242132/242177 co-relation queries the response was YES. [2023-08-27 08:49:25,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98061 conditions, 9343 events. 4391/9343 cut-off events. For 242132/242177 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 84880 event pairs, 90 based on Foata normal form. 12/9334 useless extension candidates. Maximal degree in co-relation 97902. Up to 8627 conditions per place. [2023-08-27 08:49:25,283 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 1763 selfloop transitions, 155 changer transitions 16/1950 dead transitions. [2023-08-27 08:49:25,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 1950 transitions, 52488 flow [2023-08-27 08:49:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 08:49:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 08:49:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1279 transitions. [2023-08-27 08:49:25,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31721230158730157 [2023-08-27 08:49:25,286 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1279 transitions. [2023-08-27 08:49:25,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1279 transitions. [2023-08-27 08:49:25,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:49:25,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1279 transitions. [2023-08-27 08:49:25,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.58333333333333) internal successors, (1279), 12 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:25,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 336.0) internal successors, (4368), 13 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:25,289 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 336.0) internal successors, (4368), 13 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:25,289 INFO L175 Difference]: Start difference. First operand has 523 places, 1896 transitions, 47673 flow. Second operand 12 states and 1279 transitions. [2023-08-27 08:49:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 1950 transitions, 52488 flow [2023-08-27 08:49:30,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1950 transitions, 51972 flow, removed 172 selfloop flow, removed 13 redundant places. [2023-08-27 08:49:30,530 INFO L231 Difference]: Finished difference. Result has 524 places, 1906 transitions, 47922 flow [2023-08-27 08:49:30,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=47157, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=47922, PETRI_PLACES=524, PETRI_TRANSITIONS=1906} [2023-08-27 08:49:30,531 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 501 predicate places. [2023-08-27 08:49:30,531 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 1906 transitions, 47922 flow [2023-08-27 08:49:30,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 103.76) internal successors, (2594), 25 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:30,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:49:30,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:49:30,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 08:49:30,732 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 08:49:30,732 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:49:30,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:49:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1376723216, now seen corresponding path program 19 times [2023-08-27 08:49:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:49:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816483789] [2023-08-27 08:49:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:49:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:49:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:49:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:49:30,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:49:30,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816483789] [2023-08-27 08:49:30,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816483789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:49:30,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098178919] [2023-08-27 08:49:30,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:49:30,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:49:30,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:49:30,867 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:49:30,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 08:49:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:49:30,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:49:30,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:49:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:49:31,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:49:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:49:31,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098178919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:49:31,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:49:31,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 08:49:31,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648045315] [2023-08-27 08:49:31,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:49:31,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:49:31,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:49:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:49:31,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:49:31,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:49:31,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 1906 transitions, 47922 flow. Second operand has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:31,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:49:31,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:49:31,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:49:37,809 INFO L124 PetriNetUnfolderBase]: 4913/10143 cut-off events. [2023-08-27 08:49:37,809 INFO L125 PetriNetUnfolderBase]: For 276381/276381 co-relation queries the response was YES. [2023-08-27 08:49:37,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108776 conditions, 10143 events. 4913/10143 cut-off events. For 276381/276381 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 91200 event pairs, 1388 based on Foata normal form. 124/10267 useless extension candidates. Maximal degree in co-relation 108613. Up to 7694 conditions per place. [2023-08-27 08:49:37,946 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 1447 selfloop transitions, 837 changer transitions 0/2284 dead transitions. [2023-08-27 08:49:37,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 2284 transitions, 62013 flow [2023-08-27 08:49:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 08:49:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 08:49:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4909 transitions. [2023-08-27 08:49:37,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40583664021164023 [2023-08-27 08:49:37,949 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4909 transitions. [2023-08-27 08:49:37,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4909 transitions. [2023-08-27 08:49:37,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:49:37,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4909 transitions. [2023-08-27 08:49:37,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 136.36111111111111) internal successors, (4909), 36 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:37,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 336.0) internal successors, (12432), 37 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:37,957 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 336.0) internal successors, (12432), 37 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:37,957 INFO L175 Difference]: Start difference. First operand has 524 places, 1906 transitions, 47922 flow. Second operand 36 states and 4909 transitions. [2023-08-27 08:49:37,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 2284 transitions, 62013 flow [2023-08-27 08:49:43,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 2284 transitions, 61648 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-08-27 08:49:43,981 INFO L231 Difference]: Finished difference. Result has 563 places, 2177 transitions, 58493 flow [2023-08-27 08:49:43,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=47509, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=58493, PETRI_PLACES=563, PETRI_TRANSITIONS=2177} [2023-08-27 08:49:43,983 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 540 predicate places. [2023-08-27 08:49:43,983 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 2177 transitions, 58493 flow [2023-08-27 08:49:43,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:43,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:49:43,983 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:49:43,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-27 08:49:44,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:49:44,187 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:49:44,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:49:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash 964212358, now seen corresponding path program 20 times [2023-08-27 08:49:44,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:49:44,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254345702] [2023-08-27 08:49:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:49:44,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:49:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:49:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:49:44,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:49:44,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254345702] [2023-08-27 08:49:44,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254345702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:49:44,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515241202] [2023-08-27 08:49:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:49:44,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:49:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:49:44,337 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:49:44,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 08:49:44,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:49:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:49:44,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:49:44,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:49:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:49:44,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:49:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:49:44,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515241202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:49:44,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:49:44,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 08:49:44,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983689491] [2023-08-27 08:49:44,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:49:44,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:49:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:49:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:49:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:49:44,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:49:44,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2177 transitions, 58493 flow. Second operand has 18 states, 18 states have (on average 134.22222222222223) internal successors, (2416), 18 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:44,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:49:44,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:49:44,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:49:53,081 INFO L124 PetriNetUnfolderBase]: 5188/10671 cut-off events. [2023-08-27 08:49:53,081 INFO L125 PetriNetUnfolderBase]: For 356299/356299 co-relation queries the response was YES. [2023-08-27 08:49:53,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119961 conditions, 10671 events. 5188/10671 cut-off events. For 356299/356299 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 96106 event pairs, 63 based on Foata normal form. 72/10743 useless extension candidates. Maximal degree in co-relation 119788. Up to 4414 conditions per place. [2023-08-27 08:49:53,238 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 1290 selfloop transitions, 1086 changer transitions 1/2377 dead transitions. [2023-08-27 08:49:53,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 2377 transitions, 66429 flow [2023-08-27 08:49:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:49:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:49:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4667 transitions. [2023-08-27 08:49:53,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40852591036414565 [2023-08-27 08:49:53,241 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4667 transitions. [2023-08-27 08:49:53,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4667 transitions. [2023-08-27 08:49:53,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:49:53,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4667 transitions. [2023-08-27 08:49:53,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 137.26470588235293) internal successors, (4667), 34 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:53,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 336.0) internal successors, (11760), 35 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:53,248 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 336.0) internal successors, (11760), 35 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:53,248 INFO L175 Difference]: Start difference. First operand has 563 places, 2177 transitions, 58493 flow. Second operand 34 states and 4667 transitions. [2023-08-27 08:49:53,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 2377 transitions, 66429 flow [2023-08-27 08:50:01,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 2377 transitions, 65862 flow, removed 164 selfloop flow, removed 16 redundant places. [2023-08-27 08:50:01,794 INFO L231 Difference]: Finished difference. Result has 590 places, 2277 transitions, 62570 flow [2023-08-27 08:50:01,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=57845, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=998, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=62570, PETRI_PLACES=590, PETRI_TRANSITIONS=2277} [2023-08-27 08:50:01,796 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 567 predicate places. [2023-08-27 08:50:01,796 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 2277 transitions, 62570 flow [2023-08-27 08:50:01,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 134.22222222222223) internal successors, (2416), 18 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:01,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:50:01,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:50:01,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 08:50:02,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:50:02,000 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:50:02,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:50:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash -124617200, now seen corresponding path program 21 times [2023-08-27 08:50:02,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:50:02,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624877746] [2023-08-27 08:50:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:50:02,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:50:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:50:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:50:02,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:50:02,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624877746] [2023-08-27 08:50:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624877746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:50:02,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976327286] [2023-08-27 08:50:02,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:50:02,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:50:02,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:50:02,173 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:50:02,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 08:50:02,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:50:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:50:02,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:50:02,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:50:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:50:02,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:50:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:50:02,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976327286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:50:02,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:50:02,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 08:50:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415975724] [2023-08-27 08:50:02,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:50:02,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:50:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:50:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:50:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:50:02,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:50:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 2277 transitions, 62570 flow. Second operand has 18 states, 18 states have (on average 133.94444444444446) internal successors, (2411), 18 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:02,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:50:02,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:50:02,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:50:11,150 INFO L124 PetriNetUnfolderBase]: 5363/10946 cut-off events. [2023-08-27 08:50:11,150 INFO L125 PetriNetUnfolderBase]: For 413230/413230 co-relation queries the response was YES. [2023-08-27 08:50:11,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127541 conditions, 10946 events. 5363/10946 cut-off events. For 413230/413230 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 98067 event pairs, 115 based on Foata normal form. 76/11022 useless extension candidates. Maximal degree in co-relation 127360. Up to 6079 conditions per place. [2023-08-27 08:50:11,310 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 1851 selfloop transitions, 697 changer transitions 2/2550 dead transitions. [2023-08-27 08:50:11,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 2550 transitions, 74198 flow [2023-08-27 08:50:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:50:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:50:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4376 transitions. [2023-08-27 08:50:11,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069940476190476 [2023-08-27 08:50:11,319 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4376 transitions. [2023-08-27 08:50:11,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4376 transitions. [2023-08-27 08:50:11,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:50:11,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4376 transitions. [2023-08-27 08:50:11,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 136.75) internal successors, (4376), 32 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:11,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 336.0) internal successors, (11088), 33 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:11,326 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 336.0) internal successors, (11088), 33 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:11,326 INFO L175 Difference]: Start difference. First operand has 590 places, 2277 transitions, 62570 flow. Second operand 32 states and 4376 transitions. [2023-08-27 08:50:11,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 2550 transitions, 74198 flow [2023-08-27 08:50:20,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 2550 transitions, 72380 flow, removed 361 selfloop flow, removed 17 redundant places. [2023-08-27 08:50:20,200 INFO L231 Difference]: Finished difference. Result has 613 places, 2395 transitions, 66266 flow [2023-08-27 08:50:20,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=60753, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=608, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=66266, PETRI_PLACES=613, PETRI_TRANSITIONS=2395} [2023-08-27 08:50:20,202 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 590 predicate places. [2023-08-27 08:50:20,202 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 2395 transitions, 66266 flow [2023-08-27 08:50:20,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.94444444444446) internal successors, (2411), 18 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:20,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:50:20,202 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:50:20,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 08:50:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 08:50:20,403 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:50:20,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:50:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1293427076, now seen corresponding path program 22 times [2023-08-27 08:50:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:50:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967089036] [2023-08-27 08:50:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:50:20,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:50:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:50:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:50:20,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:50:20,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967089036] [2023-08-27 08:50:20,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967089036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:50:20,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159079902] [2023-08-27 08:50:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:50:20,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:50:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:50:20,543 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:50:20,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 08:50:20,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:50:20,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:50:20,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:50:20,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:50:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:50:20,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:50:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:50:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159079902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:50:20,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:50:20,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-27 08:50:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678488410] [2023-08-27 08:50:20,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:50:20,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:50:20,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:50:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:50:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:50:20,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:50:20,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 2395 transitions, 66266 flow. Second operand has 16 states, 16 states have (on average 133.9375) internal successors, (2143), 16 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:20,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:50:20,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:50:20,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:50:28,268 INFO L124 PetriNetUnfolderBase]: 5701/11494 cut-off events. [2023-08-27 08:50:28,268 INFO L125 PetriNetUnfolderBase]: For 469647/469647 co-relation queries the response was YES. [2023-08-27 08:50:28,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138254 conditions, 11494 events. 5701/11494 cut-off events. For 469647/469647 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 102718 event pairs, 129 based on Foata normal form. 32/11526 useless extension candidates. Maximal degree in co-relation 138068. Up to 6943 conditions per place. [2023-08-27 08:50:28,449 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 2138 selfloop transitions, 548 changer transitions 2/2688 dead transitions. [2023-08-27 08:50:28,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 2688 transitions, 81179 flow [2023-08-27 08:50:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 08:50:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 08:50:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1932 transitions. [2023-08-27 08:50:28,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-08-27 08:50:28,451 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1932 transitions. [2023-08-27 08:50:28,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1932 transitions. [2023-08-27 08:50:28,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:50:28,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1932 transitions. [2023-08-27 08:50:28,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 138.0) internal successors, (1932), 14 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:28,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 336.0) internal successors, (5040), 15 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:28,455 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 336.0) internal successors, (5040), 15 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:28,455 INFO L175 Difference]: Start difference. First operand has 613 places, 2395 transitions, 66266 flow. Second operand 14 states and 1932 transitions. [2023-08-27 08:50:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 2688 transitions, 81179 flow [2023-08-27 08:50:40,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 2688 transitions, 79708 flow, removed 185 selfloop flow, removed 14 redundant places. [2023-08-27 08:50:40,315 INFO L231 Difference]: Finished difference. Result has 616 places, 2541 transitions, 72649 flow [2023-08-27 08:50:40,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=64911, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=72649, PETRI_PLACES=616, PETRI_TRANSITIONS=2541} [2023-08-27 08:50:40,316 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 593 predicate places. [2023-08-27 08:50:40,317 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 2541 transitions, 72649 flow [2023-08-27 08:50:40,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 133.9375) internal successors, (2143), 16 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:40,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:50:40,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:50:40,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-27 08:50:40,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 08:50:40,520 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:50:40,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:50:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1405231692, now seen corresponding path program 23 times [2023-08-27 08:50:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:50:40,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391074908] [2023-08-27 08:50:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:50:40,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:50:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:50:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:50:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:50:40,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391074908] [2023-08-27 08:50:40,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391074908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:50:40,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762547643] [2023-08-27 08:50:40,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:50:40,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:50:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:50:40,648 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:50:40,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 08:50:40,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:50:40,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:50:40,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:50:40,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:50:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:50:40,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:50:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:50:41,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762547643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:50:41,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:50:41,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-08-27 08:50:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065309810] [2023-08-27 08:50:41,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:50:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 08:50:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:50:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 08:50:41,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-27 08:50:41,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:50:41,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 2541 transitions, 72649 flow. Second operand has 19 states, 19 states have (on average 134.0) internal successors, (2546), 19 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:41,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:50:41,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:50:41,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:50:49,669 INFO L124 PetriNetUnfolderBase]: 5832/11731 cut-off events. [2023-08-27 08:50:49,670 INFO L125 PetriNetUnfolderBase]: For 463599/463599 co-relation queries the response was YES. [2023-08-27 08:50:49,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141200 conditions, 11731 events. 5832/11731 cut-off events. For 463599/463599 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 105191 event pairs, 61 based on Foata normal form. 46/11777 useless extension candidates. Maximal degree in co-relation 141009. Up to 6838 conditions per place. [2023-08-27 08:50:49,855 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 1933 selfloop transitions, 732 changer transitions 1/2666 dead transitions. [2023-08-27 08:50:49,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 2666 transitions, 79981 flow [2023-08-27 08:50:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:50:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:50:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2761 transitions. [2023-08-27 08:50:49,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108630952380952 [2023-08-27 08:50:49,865 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2761 transitions. [2023-08-27 08:50:49,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2761 transitions. [2023-08-27 08:50:49,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:50:49,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2761 transitions. [2023-08-27 08:50:49,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 138.05) internal successors, (2761), 20 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:49,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 336.0) internal successors, (7056), 21 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:49,870 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 336.0) internal successors, (7056), 21 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:50:49,870 INFO L175 Difference]: Start difference. First operand has 616 places, 2541 transitions, 72649 flow. Second operand 20 states and 2761 transitions. [2023-08-27 08:50:49,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 2666 transitions, 79981 flow [2023-08-27 08:51:01,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 2666 transitions, 78930 flow, removed 22 selfloop flow, removed 23 redundant places. [2023-08-27 08:51:01,591 INFO L231 Difference]: Finished difference. Result has 619 places, 2592 transitions, 74827 flow [2023-08-27 08:51:01,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=71635, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=74827, PETRI_PLACES=619, PETRI_TRANSITIONS=2592} [2023-08-27 08:51:01,593 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 596 predicate places. [2023-08-27 08:51:01,593 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 2592 transitions, 74827 flow [2023-08-27 08:51:01,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 134.0) internal successors, (2546), 19 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:01,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:51:01,594 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:51:01,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-27 08:51:01,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-27 08:51:01,798 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:51:01,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:51:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1840322108, now seen corresponding path program 24 times [2023-08-27 08:51:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:51:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088406564] [2023-08-27 08:51:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:51:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:51:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:51:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:51:01,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:51:01,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088406564] [2023-08-27 08:51:01,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088406564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:51:01,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624198279] [2023-08-27 08:51:01,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:51:01,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:51:01,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:51:01,989 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:51:01,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 08:51:02,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:51:02,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:51:02,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:51:02,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:51:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:51:02,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:51:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:51:02,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624198279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:51:02,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:51:02,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 08:51:02,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228318188] [2023-08-27 08:51:02,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:51:02,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:51:02,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:51:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:51:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:51:02,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:51:02,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 2592 transitions, 74827 flow. Second operand has 17 states, 17 states have (on average 134.2941176470588) internal successors, (2283), 17 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:02,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:51:02,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:51:02,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:51:12,409 INFO L124 PetriNetUnfolderBase]: 6082/12312 cut-off events. [2023-08-27 08:51:12,409 INFO L125 PetriNetUnfolderBase]: For 559070/559070 co-relation queries the response was YES. [2023-08-27 08:51:12,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151015 conditions, 12312 events. 6082/12312 cut-off events. For 559070/559070 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 111719 event pairs, 90 based on Foata normal form. 60/12372 useless extension candidates. Maximal degree in co-relation 150833. Up to 6431 conditions per place. [2023-08-27 08:51:12,771 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 1841 selfloop transitions, 933 changer transitions 6/2780 dead transitions. [2023-08-27 08:51:12,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 2780 transitions, 84461 flow [2023-08-27 08:51:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 08:51:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 08:51:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3721 transitions. [2023-08-27 08:51:12,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41016313932980597 [2023-08-27 08:51:12,774 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3721 transitions. [2023-08-27 08:51:12,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3721 transitions. [2023-08-27 08:51:12,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:51:12,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3721 transitions. [2023-08-27 08:51:12,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 137.8148148148148) internal successors, (3721), 27 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:12,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 336.0) internal successors, (9408), 28 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:12,781 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 336.0) internal successors, (9408), 28 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:12,781 INFO L175 Difference]: Start difference. First operand has 619 places, 2592 transitions, 74827 flow. Second operand 27 states and 3721 transitions. [2023-08-27 08:51:12,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 2780 transitions, 84461 flow [2023-08-27 08:51:26,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2780 transitions, 82454 flow, removed 132 selfloop flow, removed 10 redundant places. [2023-08-27 08:51:27,004 INFO L231 Difference]: Finished difference. Result has 640 places, 2673 transitions, 77847 flow [2023-08-27 08:51:27,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=72719, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=77847, PETRI_PLACES=640, PETRI_TRANSITIONS=2673} [2023-08-27 08:51:27,006 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 617 predicate places. [2023-08-27 08:51:27,006 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 2673 transitions, 77847 flow [2023-08-27 08:51:27,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 134.2941176470588) internal successors, (2283), 17 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:27,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:51:27,006 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:51:27,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 08:51:27,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:51:27,207 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:51:27,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:51:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -363060588, now seen corresponding path program 25 times [2023-08-27 08:51:27,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:51:27,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700366861] [2023-08-27 08:51:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:51:27,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:51:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:51:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:51:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:51:27,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700366861] [2023-08-27 08:51:27,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700366861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:51:27,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205990805] [2023-08-27 08:51:27,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:51:27,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:51:27,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:51:27,320 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:51:27,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 08:51:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:51:27,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:51:27,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:51:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:51:27,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:51:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:51:27,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205990805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:51:27,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:51:27,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-27 08:51:27,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156382919] [2023-08-27 08:51:27,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:51:27,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:51:27,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:51:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:51:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:51:27,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:51:27,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 2673 transitions, 77847 flow. Second operand has 17 states, 17 states have (on average 133.8235294117647) internal successors, (2275), 17 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:27,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:51:27,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:51:27,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:51:37,707 INFO L124 PetriNetUnfolderBase]: 6273/12624 cut-off events. [2023-08-27 08:51:37,707 INFO L125 PetriNetUnfolderBase]: For 608865/608865 co-relation queries the response was YES. [2023-08-27 08:51:37,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158469 conditions, 12624 events. 6273/12624 cut-off events. For 608865/608865 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 114583 event pairs, 2227 based on Foata normal form. 58/12682 useless extension candidates. Maximal degree in co-relation 158282. Up to 11338 conditions per place. [2023-08-27 08:51:37,912 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 2489 selfloop transitions, 361 changer transitions 0/2850 dead transitions. [2023-08-27 08:51:37,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 2850 transitions, 87187 flow [2023-08-27 08:51:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 08:51:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 08:51:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3583 transitions. [2023-08-27 08:51:37,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101419413919414 [2023-08-27 08:51:37,914 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3583 transitions. [2023-08-27 08:51:37,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3583 transitions. [2023-08-27 08:51:37,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:51:37,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3583 transitions. [2023-08-27 08:51:37,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 137.80769230769232) internal successors, (3583), 26 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:37,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 336.0) internal successors, (9072), 27 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:37,920 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 336.0) internal successors, (9072), 27 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:37,920 INFO L175 Difference]: Start difference. First operand has 640 places, 2673 transitions, 77847 flow. Second operand 26 states and 3583 transitions. [2023-08-27 08:51:37,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 2850 transitions, 87187 flow [2023-08-27 08:51:52,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 2850 transitions, 85401 flow, removed 704 selfloop flow, removed 13 redundant places. [2023-08-27 08:51:52,663 INFO L231 Difference]: Finished difference. Result has 666 places, 2740 transitions, 79358 flow [2023-08-27 08:51:52,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=76189, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=79358, PETRI_PLACES=666, PETRI_TRANSITIONS=2740} [2023-08-27 08:51:52,665 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 643 predicate places. [2023-08-27 08:51:52,665 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 2740 transitions, 79358 flow [2023-08-27 08:51:52,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.8235294117647) internal successors, (2275), 17 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:52,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:51:52,665 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:51:52,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 08:51:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 08:51:52,869 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:51:52,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:51:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 405975246, now seen corresponding path program 26 times [2023-08-27 08:51:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:51:52,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111225775] [2023-08-27 08:51:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:51:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:51:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:51:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:51:52,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:51:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111225775] [2023-08-27 08:51:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111225775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:51:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434685705] [2023-08-27 08:51:52,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:51:52,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:51:52,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:51:52,978 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:51:52,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 08:51:53,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:51:53,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:51:53,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:51:53,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:51:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:51:53,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:51:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:51:53,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434685705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:51:53,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:51:53,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-27 08:51:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235398115] [2023-08-27 08:51:53,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:51:53,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:51:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:51:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:51:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:51:53,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:51:53,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2740 transitions, 79358 flow. Second operand has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:53,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:51:53,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:51:53,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:52:04,216 INFO L124 PetriNetUnfolderBase]: 6349/12814 cut-off events. [2023-08-27 08:52:04,217 INFO L125 PetriNetUnfolderBase]: For 590872/590872 co-relation queries the response was YES. [2023-08-27 08:52:04,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158825 conditions, 12814 events. 6349/12814 cut-off events. For 590872/590872 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 116998 event pairs, 1733 based on Foata normal form. 12/12826 useless extension candidates. Maximal degree in co-relation 158628. Up to 7761 conditions per place. [2023-08-27 08:52:04,422 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 2378 selfloop transitions, 466 changer transitions 9/2853 dead transitions. [2023-08-27 08:52:04,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 2853 transitions, 87358 flow [2023-08-27 08:52:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:52:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:52:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2735 transitions. [2023-08-27 08:52:04,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069940476190476 [2023-08-27 08:52:04,424 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2735 transitions. [2023-08-27 08:52:04,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2735 transitions. [2023-08-27 08:52:04,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:52:04,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2735 transitions. [2023-08-27 08:52:04,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 136.75) internal successors, (2735), 20 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:04,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 336.0) internal successors, (7056), 21 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:04,429 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 336.0) internal successors, (7056), 21 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:04,429 INFO L175 Difference]: Start difference. First operand has 666 places, 2740 transitions, 79358 flow. Second operand 20 states and 2735 transitions. [2023-08-27 08:52:04,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 2853 transitions, 87358 flow [2023-08-27 08:52:18,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 2853 transitions, 86897 flow, removed 173 selfloop flow, removed 5 redundant places. [2023-08-27 08:52:18,098 INFO L231 Difference]: Finished difference. Result has 687 places, 2771 transitions, 81260 flow [2023-08-27 08:52:18,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=78835, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=81260, PETRI_PLACES=687, PETRI_TRANSITIONS=2771} [2023-08-27 08:52:18,099 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 664 predicate places. [2023-08-27 08:52:18,100 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 2771 transitions, 81260 flow [2023-08-27 08:52:18,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:18,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:52:18,100 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:52:18,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 08:52:18,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 08:52:18,308 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:52:18,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:52:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash -297866320, now seen corresponding path program 27 times [2023-08-27 08:52:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:52:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583726399] [2023-08-27 08:52:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:52:18,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:52:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:52:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:52:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:52:18,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583726399] [2023-08-27 08:52:18,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583726399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:52:18,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397679064] [2023-08-27 08:52:18,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:52:18,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:52:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:52:18,443 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:52:18,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 08:52:18,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 08:52:18,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:52:18,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:52:18,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:52:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:52:18,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:52:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:52:18,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397679064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:52:18,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:52:18,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 08:52:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526577699] [2023-08-27 08:52:18,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:52:18,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:52:18,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:52:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:52:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:52:18,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:52:18,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 2771 transitions, 81260 flow. Second operand has 18 states, 18 states have (on average 134.0) internal successors, (2412), 18 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:18,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:52:18,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:52:18,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:52:30,156 INFO L124 PetriNetUnfolderBase]: 6349/12807 cut-off events. [2023-08-27 08:52:30,157 INFO L125 PetriNetUnfolderBase]: For 632507/632507 co-relation queries the response was YES. [2023-08-27 08:52:30,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161961 conditions, 12807 events. 6349/12807 cut-off events. For 632507/632507 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 116880 event pairs, 1754 based on Foata normal form. 20/12827 useless extension candidates. Maximal degree in co-relation 161758. Up to 8751 conditions per place. [2023-08-27 08:52:30,370 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 2305 selfloop transitions, 553 changer transitions 0/2858 dead transitions. [2023-08-27 08:52:30,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 2858 transitions, 88555 flow [2023-08-27 08:52:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:52:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:52:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3301 transitions. [2023-08-27 08:52:30,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40935019841269843 [2023-08-27 08:52:30,373 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3301 transitions. [2023-08-27 08:52:30,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3301 transitions. [2023-08-27 08:52:30,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:52:30,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3301 transitions. [2023-08-27 08:52:30,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 137.54166666666666) internal successors, (3301), 24 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 336.0) internal successors, (8400), 25 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:30,378 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 336.0) internal successors, (8400), 25 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:30,378 INFO L175 Difference]: Start difference. First operand has 687 places, 2771 transitions, 81260 flow. Second operand 24 states and 3301 transitions. [2023-08-27 08:52:30,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 2858 transitions, 88555 flow [2023-08-27 08:52:43,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 2858 transitions, 88189 flow, removed 60 selfloop flow, removed 6 redundant places. [2023-08-27 08:52:43,325 INFO L231 Difference]: Finished difference. Result has 704 places, 2785 transitions, 82955 flow [2023-08-27 08:52:43,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=80843, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=82955, PETRI_PLACES=704, PETRI_TRANSITIONS=2785} [2023-08-27 08:52:43,327 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 681 predicate places. [2023-08-27 08:52:43,327 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 2785 transitions, 82955 flow [2023-08-27 08:52:43,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 134.0) internal successors, (2412), 18 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:43,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:52:43,327 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:52:43,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 08:52:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:52:43,529 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:52:43,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:52:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash -595021564, now seen corresponding path program 28 times [2023-08-27 08:52:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:52:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896105758] [2023-08-27 08:52:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:52:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:52:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:52:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:52:43,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:52:43,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896105758] [2023-08-27 08:52:43,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896105758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:52:43,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533355816] [2023-08-27 08:52:43,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:52:43,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:52:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:52:43,656 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:52:43,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 08:52:43,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:52:43,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:52:43,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:52:43,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:52:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:52:43,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:52:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:52:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533355816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:52:43,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:52:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-27 08:52:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771214390] [2023-08-27 08:52:43,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:52:43,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:52:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:52:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:52:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:52:43,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:52:43,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 2785 transitions, 82955 flow. Second operand has 16 states, 16 states have (on average 134.1875) internal successors, (2147), 16 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:43,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:52:43,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:52:43,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:52:55,100 INFO L124 PetriNetUnfolderBase]: 6554/13172 cut-off events. [2023-08-27 08:52:55,100 INFO L125 PetriNetUnfolderBase]: For 657932/657932 co-relation queries the response was YES. [2023-08-27 08:52:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169022 conditions, 13172 events. 6554/13172 cut-off events. For 657932/657932 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 120367 event pairs, 2394 based on Foata normal form. 64/13236 useless extension candidates. Maximal degree in co-relation 168814. Up to 12128 conditions per place. [2023-08-27 08:52:55,436 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 2667 selfloop transitions, 288 changer transitions 0/2955 dead transitions. [2023-08-27 08:52:55,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 2955 transitions, 92754 flow [2023-08-27 08:52:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:52:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:52:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3989 transitions. [2023-08-27 08:52:55,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40938013136289 [2023-08-27 08:52:55,440 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3989 transitions. [2023-08-27 08:52:55,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3989 transitions. [2023-08-27 08:52:55,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:52:55,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3989 transitions. [2023-08-27 08:52:55,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 137.55172413793105) internal successors, (3989), 29 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:55,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 336.0) internal successors, (10080), 30 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:55,446 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 336.0) internal successors, (10080), 30 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:55,446 INFO L175 Difference]: Start difference. First operand has 704 places, 2785 transitions, 82955 flow. Second operand 29 states and 3989 transitions. [2023-08-27 08:52:55,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 2955 transitions, 92754 flow [2023-08-27 08:53:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 2955 transitions, 92117 flow, removed 233 selfloop flow, removed 13 redundant places. [2023-08-27 08:53:09,884 INFO L231 Difference]: Finished difference. Result has 735 places, 2858 transitions, 85677 flow [2023-08-27 08:53:09,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=82222, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=85677, PETRI_PLACES=735, PETRI_TRANSITIONS=2858} [2023-08-27 08:53:09,886 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 712 predicate places. [2023-08-27 08:53:09,886 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 2858 transitions, 85677 flow [2023-08-27 08:53:09,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 134.1875) internal successors, (2147), 16 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:09,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:53:09,886 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:53:09,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 08:53:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:10,089 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:53:10,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:53:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash -982938808, now seen corresponding path program 29 times [2023-08-27 08:53:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:53:10,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880265911] [2023-08-27 08:53:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:53:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:53:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:53:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:53:10,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:53:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880265911] [2023-08-27 08:53:10,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880265911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:53:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856141963] [2023-08-27 08:53:10,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:53:10,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:10,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:53:10,213 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:53:10,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 08:53:10,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 08:53:10,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:53:10,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:53:10,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:53:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:53:10,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:53:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:53:10,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856141963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:53:10,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:53:10,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 08:53:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289858665] [2023-08-27 08:53:10,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:53:10,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:53:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:53:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:53:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:53:10,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:53:10,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 2858 transitions, 85677 flow. Second operand has 18 states, 18 states have (on average 134.11111111111111) internal successors, (2414), 18 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:10,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:53:10,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:53:10,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:53:22,199 INFO L124 PetriNetUnfolderBase]: 6583/13247 cut-off events. [2023-08-27 08:53:22,199 INFO L125 PetriNetUnfolderBase]: For 677568/677568 co-relation queries the response was YES. [2023-08-27 08:53:22,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171566 conditions, 13247 events. 6583/13247 cut-off events. For 677568/677568 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 121082 event pairs, 1940 based on Foata normal form. 32/13279 useless extension candidates. Maximal degree in co-relation 171343. Up to 9623 conditions per place. [2023-08-27 08:53:22,460 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 2533 selfloop transitions, 414 changer transitions 0/2947 dead transitions. [2023-08-27 08:53:22,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 2947 transitions, 93499 flow [2023-08-27 08:53:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:53:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:53:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3161 transitions. [2023-08-27 08:53:22,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090320910973085 [2023-08-27 08:53:22,463 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3161 transitions. [2023-08-27 08:53:22,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3161 transitions. [2023-08-27 08:53:22,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:53:22,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3161 transitions. [2023-08-27 08:53:22,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 137.43478260869566) internal successors, (3161), 23 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:22,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 336.0) internal successors, (8064), 24 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:22,470 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 336.0) internal successors, (8064), 24 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:22,470 INFO L175 Difference]: Start difference. First operand has 735 places, 2858 transitions, 85677 flow. Second operand 23 states and 3161 transitions. [2023-08-27 08:53:22,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 2947 transitions, 93499 flow [2023-08-27 08:53:37,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 748 places, 2947 transitions, 92627 flow, removed 329 selfloop flow, removed 7 redundant places. [2023-08-27 08:53:37,738 INFO L231 Difference]: Finished difference. Result has 752 places, 2875 transitions, 86666 flow [2023-08-27 08:53:37,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=84695, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=86666, PETRI_PLACES=752, PETRI_TRANSITIONS=2875} [2023-08-27 08:53:37,741 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 729 predicate places. [2023-08-27 08:53:37,741 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 2875 transitions, 86666 flow [2023-08-27 08:53:37,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 134.11111111111111) internal successors, (2414), 18 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:37,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:53:37,741 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:53:37,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 08:53:37,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-27 08:53:37,941 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:53:37,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:53:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1685461352, now seen corresponding path program 30 times [2023-08-27 08:53:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:53:37,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364210034] [2023-08-27 08:53:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:53:37,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:53:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:53:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:53:38,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:53:38,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364210034] [2023-08-27 08:53:38,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364210034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:53:38,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065873475] [2023-08-27 08:53:38,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:53:38,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:53:38,071 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:53:38,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 08:53:38,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 08:53:38,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:53:38,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:53:38,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:53:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:53:38,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:53:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:53:38,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065873475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:53:38,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:53:38,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 08:53:38,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872868741] [2023-08-27 08:53:38,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:53:38,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 08:53:38,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:53:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 08:53:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-27 08:53:38,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:53:38,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 2875 transitions, 86666 flow. Second operand has 19 states, 19 states have (on average 133.8421052631579) internal successors, (2543), 19 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:38,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:53:38,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:53:38,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:53:50,694 INFO L124 PetriNetUnfolderBase]: 6687/13429 cut-off events. [2023-08-27 08:53:50,694 INFO L125 PetriNetUnfolderBase]: For 714733/714733 co-relation queries the response was YES. [2023-08-27 08:53:50,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175774 conditions, 13429 events. 6687/13429 cut-off events. For 714733/714733 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 122997 event pairs, 1824 based on Foata normal form. 20/13449 useless extension candidates. Maximal degree in co-relation 175549. Up to 8967 conditions per place. [2023-08-27 08:53:50,942 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 2337 selfloop transitions, 686 changer transitions 1/3024 dead transitions. [2023-08-27 08:53:50,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 3024 transitions, 96662 flow [2023-08-27 08:53:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:53:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:53:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3990 transitions. [2023-08-27 08:53:50,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2023-08-27 08:53:50,945 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3990 transitions. [2023-08-27 08:53:50,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3990 transitions. [2023-08-27 08:53:50,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:53:50,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3990 transitions. [2023-08-27 08:53:50,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 137.58620689655172) internal successors, (3990), 29 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:50,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 336.0) internal successors, (10080), 30 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:50,952 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 336.0) internal successors, (10080), 30 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:50,952 INFO L175 Difference]: Start difference. First operand has 752 places, 2875 transitions, 86666 flow. Second operand 29 states and 3990 transitions. [2023-08-27 08:53:50,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 3024 transitions, 96662 flow [2023-08-27 08:54:06,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 3024 transitions, 95390 flow, removed 395 selfloop flow, removed 10 redundant places. [2023-08-27 08:54:06,959 INFO L231 Difference]: Finished difference. Result has 777 places, 2935 transitions, 90184 flow [2023-08-27 08:54:06,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=85534, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=90184, PETRI_PLACES=777, PETRI_TRANSITIONS=2935} [2023-08-27 08:54:06,961 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 754 predicate places. [2023-08-27 08:54:06,961 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2935 transitions, 90184 flow [2023-08-27 08:54:06,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.8421052631579) internal successors, (2543), 19 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:06,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:06,961 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:06,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 08:54:07,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:07,166 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:54:07,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1209765530, now seen corresponding path program 31 times [2023-08-27 08:54:07,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:07,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683176336] [2023-08-27 08:54:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:07,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:54:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683176336] [2023-08-27 08:54:07,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683176336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:54:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338259155] [2023-08-27 08:54:07,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:54:07,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:07,285 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:54:07,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 08:54:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:07,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:54:07,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:54:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:54:07,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:54:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:54:07,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338259155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:54:07,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:54:07,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-27 08:54:07,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725550567] [2023-08-27 08:54:07,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:54:07,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:54:07,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:07,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:54:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:54:07,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:54:07,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2935 transitions, 90184 flow. Second operand has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:07,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:07,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:54:07,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:20,094 INFO L124 PetriNetUnfolderBase]: 6696/13452 cut-off events. [2023-08-27 08:54:20,094 INFO L125 PetriNetUnfolderBase]: For 714724/714724 co-relation queries the response was YES. [2023-08-27 08:54:20,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178441 conditions, 13452 events. 6696/13452 cut-off events. For 714724/714724 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 123137 event pairs, 1904 based on Foata normal form. 19/13471 useless extension candidates. Maximal degree in co-relation 178208. Up to 8336 conditions per place. [2023-08-27 08:54:20,349 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 2545 selfloop transitions, 462 changer transitions 13/3020 dead transitions. [2023-08-27 08:54:20,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 3020 transitions, 98188 flow [2023-08-27 08:54:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 08:54:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 08:54:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3004 transitions. [2023-08-27 08:54:20,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063852813852814 [2023-08-27 08:54:20,351 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3004 transitions. [2023-08-27 08:54:20,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3004 transitions. [2023-08-27 08:54:20,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:20,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3004 transitions. [2023-08-27 08:54:20,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 136.54545454545453) internal successors, (3004), 22 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:20,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 336.0) internal successors, (7728), 23 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:20,356 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 336.0) internal successors, (7728), 23 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:20,356 INFO L175 Difference]: Start difference. First operand has 777 places, 2935 transitions, 90184 flow. Second operand 22 states and 3004 transitions. [2023-08-27 08:54:20,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 3020 transitions, 98188 flow [2023-08-27 08:54:37,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 3020 transitions, 96585 flow, removed 535 selfloop flow, removed 11 redundant places. [2023-08-27 08:54:37,973 INFO L231 Difference]: Finished difference. Result has 792 places, 2941 transitions, 90598 flow [2023-08-27 08:54:37,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=88431, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=90598, PETRI_PLACES=792, PETRI_TRANSITIONS=2941} [2023-08-27 08:54:37,975 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 769 predicate places. [2023-08-27 08:54:37,975 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 2941 transitions, 90598 flow [2023-08-27 08:54:37,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:37,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:37,976 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:37,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 08:54:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-27 08:54:38,181 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:54:38,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1830559766, now seen corresponding path program 32 times [2023-08-27 08:54:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926387445] [2023-08-27 08:54:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:54:38,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:38,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926387445] [2023-08-27 08:54:38,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926387445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:54:38,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107132459] [2023-08-27 08:54:38,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:54:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:38,322 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:54:38,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 08:54:38,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:54:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:54:38,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:54:38,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:54:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:54:38,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:54:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:54:38,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107132459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:54:38,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:54:38,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 08:54:38,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444925974] [2023-08-27 08:54:38,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:54:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:54:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:38,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:54:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:54:38,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:54:38,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 2941 transitions, 90598 flow. Second operand has 17 states, 17 states have (on average 134.2941176470588) internal successors, (2283), 17 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:38,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:38,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:54:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:51,792 INFO L124 PetriNetUnfolderBase]: 7012/14066 cut-off events. [2023-08-27 08:54:51,793 INFO L125 PetriNetUnfolderBase]: For 774141/774141 co-relation queries the response was YES. [2023-08-27 08:54:52,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187912 conditions, 14066 events. 7012/14066 cut-off events. For 774141/774141 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 129348 event pairs, 1920 based on Foata normal form. 83/14149 useless extension candidates. Maximal degree in co-relation 187675. Up to 9277 conditions per place. [2023-08-27 08:54:52,071 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 2482 selfloop transitions, 641 changer transitions 0/3123 dead transitions. [2023-08-27 08:54:52,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 3123 transitions, 101999 flow [2023-08-27 08:54:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:54:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:54:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3298 transitions. [2023-08-27 08:54:52,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089781746031746 [2023-08-27 08:54:52,073 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3298 transitions. [2023-08-27 08:54:52,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3298 transitions. [2023-08-27 08:54:52,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:52,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3298 transitions. [2023-08-27 08:54:52,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 137.41666666666666) internal successors, (3298), 24 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:52,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 336.0) internal successors, (8400), 25 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:52,079 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 336.0) internal successors, (8400), 25 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:52,079 INFO L175 Difference]: Start difference. First operand has 792 places, 2941 transitions, 90598 flow. Second operand 24 states and 3298 transitions. [2023-08-27 08:54:52,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 3123 transitions, 101999 flow [2023-08-27 08:55:09,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 3123 transitions, 101163 flow, removed 184 selfloop flow, removed 19 redundant places. [2023-08-27 08:55:09,311 INFO L231 Difference]: Finished difference. Result has 800 places, 3049 transitions, 96253 flow [2023-08-27 08:55:09,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=89434, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=96253, PETRI_PLACES=800, PETRI_TRANSITIONS=3049} [2023-08-27 08:55:09,313 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 777 predicate places. [2023-08-27 08:55:09,313 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 3049 transitions, 96253 flow [2023-08-27 08:55:09,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 134.2941176470588) internal successors, (2283), 17 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:09,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:55:09,314 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:55:09,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 08:55:09,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:09,519 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:55:09,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:55:09,519 INFO L85 PathProgramCache]: Analyzing trace with hash 615964826, now seen corresponding path program 33 times [2023-08-27 08:55:09,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:55:09,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979314814] [2023-08-27 08:55:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:55:09,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:55:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:55:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:55:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979314814] [2023-08-27 08:55:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979314814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:55:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707436128] [2023-08-27 08:55:09,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:55:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:55:09,644 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:55:09,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 08:55:09,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 08:55:09,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:55:09,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:55:09,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:55:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:55:09,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:55:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:55:09,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707436128] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:55:09,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:55:09,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-27 08:55:09,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78397925] [2023-08-27 08:55:09,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:55:09,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:55:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:55:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:55:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:55:09,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 336 [2023-08-27 08:55:09,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 3049 transitions, 96253 flow. Second operand has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:09,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:55:09,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 336 [2023-08-27 08:55:09,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:55:24,260 INFO L124 PetriNetUnfolderBase]: 7318/14794 cut-off events. [2023-08-27 08:55:24,261 INFO L125 PetriNetUnfolderBase]: For 913615/913615 co-relation queries the response was YES. [2023-08-27 08:55:24,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202939 conditions, 14794 events. 7318/14794 cut-off events. For 913615/913615 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 137902 event pairs, 2323 based on Foata normal form. 26/14820 useless extension candidates. Maximal degree in co-relation 202704. Up to 11488 conditions per place. [2023-08-27 08:55:24,631 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 2619 selfloop transitions, 586 changer transitions 4/3209 dead transitions. [2023-08-27 08:55:24,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 3209 transitions, 107581 flow [2023-08-27 08:55:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:55:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:55:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2203 transitions. [2023-08-27 08:55:24,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40978422619047616 [2023-08-27 08:55:24,633 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2203 transitions. [2023-08-27 08:55:24,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2203 transitions. [2023-08-27 08:55:24,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:55:24,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2203 transitions. [2023-08-27 08:55:24,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 137.6875) internal successors, (2203), 16 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:24,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:24,637 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:24,637 INFO L175 Difference]: Start difference. First operand has 800 places, 3049 transitions, 96253 flow. Second operand 16 states and 2203 transitions. [2023-08-27 08:55:24,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 3209 transitions, 107581 flow [2023-08-27 08:55:43,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 3209 transitions, 105682 flow, removed 701 selfloop flow, removed 17 redundant places. [2023-08-27 08:55:43,883 INFO L231 Difference]: Finished difference. Result has 799 places, 3116 transitions, 98737 flow [2023-08-27 08:55:43,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=94339, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=98737, PETRI_PLACES=799, PETRI_TRANSITIONS=3116} [2023-08-27 08:55:43,885 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 776 predicate places. [2023-08-27 08:55:43,885 INFO L495 AbstractCegarLoop]: Abstraction has has 799 places, 3116 transitions, 98737 flow [2023-08-27 08:55:43,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:43,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:55:43,885 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:55:43,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 08:55:44,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-27 08:55:44,086 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:55:44,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:55:44,086 INFO L85 PathProgramCache]: Analyzing trace with hash 754649154, now seen corresponding path program 34 times [2023-08-27 08:55:44,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:55:44,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853478043] [2023-08-27 08:55:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:55:44,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:55:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:55:45,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:55:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853478043] [2023-08-27 08:55:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853478043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:55:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109141817] [2023-08-27 08:55:45,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:55:45,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:45,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:55:45,428 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:55:45,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 08:55:45,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:55:45,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:55:45,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 08:55:45,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:55:45,747 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:55:45,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-27 08:55:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:55:45,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:55:46,192 INFO L322 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-27 08:55:46,192 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-27 08:55:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:55:46,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109141817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:55:46,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:55:46,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-27 08:55:46,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519074902] [2023-08-27 08:55:46,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:55:46,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 08:55:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:55:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 08:55:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2023-08-27 08:55:46,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 336 [2023-08-27 08:55:46,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 3116 transitions, 98737 flow. Second operand has 26 states, 26 states have (on average 103.8076923076923) internal successors, (2699), 26 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:46,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:55:46,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 336 [2023-08-27 08:55:46,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:05,495 INFO L124 PetriNetUnfolderBase]: 9278/18866 cut-off events. [2023-08-27 08:56:05,495 INFO L125 PetriNetUnfolderBase]: For 1280534/1280548 co-relation queries the response was YES. [2023-08-27 08:56:05,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265795 conditions, 18866 events. 9278/18866 cut-off events. For 1280534/1280548 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 182765 event pairs, 523 based on Foata normal form. 14/18865 useless extension candidates. Maximal degree in co-relation 265556. Up to 14598 conditions per place. [2023-08-27 08:56:05,861 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 3228 selfloop transitions, 668 changer transitions 9/3923 dead transitions. [2023-08-27 08:56:05,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 3923 transitions, 133931 flow [2023-08-27 08:56:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:56:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:56:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3143 transitions. [2023-08-27 08:56:05,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225574712643678 [2023-08-27 08:56:05,864 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3143 transitions. [2023-08-27 08:56:05,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3143 transitions. [2023-08-27 08:56:05,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:05,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3143 transitions. [2023-08-27 08:56:05,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 108.37931034482759) internal successors, (3143), 29 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:05,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 336.0) internal successors, (10080), 30 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:05,870 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 336.0) internal successors, (10080), 30 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:05,871 INFO L175 Difference]: Start difference. First operand has 799 places, 3116 transitions, 98737 flow. Second operand 29 states and 3143 transitions. [2023-08-27 08:56:05,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 3923 transitions, 133931 flow [2023-08-27 08:56:35,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 3923 transitions, 133140 flow, removed 242 selfloop flow, removed 11 redundant places. [2023-08-27 08:56:35,183 INFO L231 Difference]: Finished difference. Result has 832 places, 3632 transitions, 118904 flow [2023-08-27 08:56:35,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=98220, PETRI_DIFFERENCE_MINUEND_PLACES=788, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=118904, PETRI_PLACES=832, PETRI_TRANSITIONS=3632} [2023-08-27 08:56:35,185 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 809 predicate places. [2023-08-27 08:56:35,185 INFO L495 AbstractCegarLoop]: Abstraction has has 832 places, 3632 transitions, 118904 flow [2023-08-27 08:56:35,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 103.8076923076923) internal successors, (2699), 26 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:35,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:35,186 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:35,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-27 08:56:35,391 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:35,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:35,391 INFO L85 PathProgramCache]: Analyzing trace with hash -456420350, now seen corresponding path program 35 times [2023-08-27 08:56:35,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:35,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044510945] [2023-08-27 08:56:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:35,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:36,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044510945] [2023-08-27 08:56:36,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044510945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311191078] [2023-08-27 08:56:36,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:56:36,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:36,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:36,598 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:36,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 08:56:36,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:56:36,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:36,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 08:56:36,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:36,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:56:37,023 INFO L322 Elim1Store]: treesize reduction 165, result has 28.9 percent of original size [2023-08-27 08:56:37,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 103 [2023-08-27 08:56:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:37,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:37,512 INFO L322 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-27 08:56:37,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-27 08:56:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:38,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311191078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:38,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:38,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-08-27 08:56:38,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538135273] [2023-08-27 08:56:38,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:38,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:56:38,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:38,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:56:38,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-08-27 08:56:38,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 336 [2023-08-27 08:56:38,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 3632 transitions, 118904 flow. Second operand has 27 states, 27 states have (on average 103.74074074074075) internal successors, (2801), 27 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:38,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:38,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 336 [2023-08-27 08:56:38,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:07,235 INFO L124 PetriNetUnfolderBase]: 12063/24811 cut-off events. [2023-08-27 08:57:07,236 INFO L125 PetriNetUnfolderBase]: For 1902463/1902477 co-relation queries the response was YES. [2023-08-27 08:57:07,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365654 conditions, 24811 events. 12063/24811 cut-off events. For 1902463/1902477 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 251523 event pairs, 856 based on Foata normal form. 56/24850 useless extension candidates. Maximal degree in co-relation 365399. Up to 16912 conditions per place. [2023-08-27 08:57:07,932 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 3424 selfloop transitions, 1157 changer transitions 83/4682 dead transitions. [2023-08-27 08:57:07,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 4682 transitions, 166150 flow [2023-08-27 08:57:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 08:57:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 08:57:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3352 transitions. [2023-08-27 08:57:07,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32181259600614437 [2023-08-27 08:57:07,935 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3352 transitions. [2023-08-27 08:57:07,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3352 transitions. [2023-08-27 08:57:07,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:07,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3352 transitions. [2023-08-27 08:57:07,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 108.12903225806451) internal successors, (3352), 31 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 336.0) internal successors, (10752), 32 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,943 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 336.0) internal successors, (10752), 32 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,943 INFO L175 Difference]: Start difference. First operand has 832 places, 3632 transitions, 118904 flow. Second operand 31 states and 3352 transitions. [2023-08-27 08:57:07,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 4682 transitions, 166150 flow [2023-08-27 08:57:53,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 4682 transitions, 161535 flow, removed 2286 selfloop flow, removed 5 redundant places. [2023-08-27 08:57:53,163 INFO L231 Difference]: Finished difference. Result has 870 places, 4322 transitions, 145645 flow [2023-08-27 08:57:53,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=116143, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=145645, PETRI_PLACES=870, PETRI_TRANSITIONS=4322} [2023-08-27 08:57:53,165 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 847 predicate places. [2023-08-27 08:57:53,165 INFO L495 AbstractCegarLoop]: Abstraction has has 870 places, 4322 transitions, 145645 flow [2023-08-27 08:57:53,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 103.74074074074075) internal successors, (2801), 27 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:53,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:53,166 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:53,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:53,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 08:57:53,370 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:53,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:53,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1811588022, now seen corresponding path program 36 times [2023-08-27 08:57:53,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:53,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719131040] [2023-08-27 08:57:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:53,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:57:54,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:54,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719131040] [2023-08-27 08:57:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719131040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:54,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988916208] [2023-08-27 08:57:54,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:57:54,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:54,868 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:54,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 08:57:55,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 08:57:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:55,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-27 08:57:55,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:55,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:57:55,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:57:55,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:57:55,369 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:55,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-08-27 08:57:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:57:55,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:55,893 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:55,893 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 536 treesize of output 308 [2023-08-27 08:57:56,249 INFO L322 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-08-27 08:57:56,250 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 726 treesize of output 881 [2023-08-27 08:57:56,674 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-27 08:57:56,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 566 treesize of output 638 [2023-08-27 08:57:57,175 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-27 08:57:57,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 221 treesize of output 413 [2023-08-27 08:58:57,513 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:59:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:59:01,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988916208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:01,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:01,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-27 08:59:01,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866739745] [2023-08-27 08:59:01,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:01,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 08:59:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 08:59:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=912, Unknown=3, NotChecked=0, Total=1056 [2023-08-27 08:59:01,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 336 [2023-08-27 08:59:01,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 870 places, 4322 transitions, 145645 flow. Second operand has 33 states, 33 states have (on average 103.45454545454545) internal successors, (3414), 33 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:01,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:01,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 336 [2023-08-27 08:59:01,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:48,829 INFO L124 PetriNetUnfolderBase]: 15920/33236 cut-off events. [2023-08-27 08:59:48,829 INFO L125 PetriNetUnfolderBase]: For 2664511/2664525 co-relation queries the response was YES. [2023-08-27 08:59:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496622 conditions, 33236 events. 15920/33236 cut-off events. For 2664511/2664525 co-relation queries the response was YES. Maximal size of possible extension queue 2127. Compared 355141 event pairs, 1395 based on Foata normal form. 70/33289 useless extension candidates. Maximal degree in co-relation 496354. Up to 23619 conditions per place. [2023-08-27 08:59:49,808 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 4409 selfloop transitions, 1444 changer transitions 55/5926 dead transitions. [2023-08-27 08:59:49,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 901 places, 5926 transitions, 214628 flow [2023-08-27 08:59:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:59:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:59:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3486 transitions. [2023-08-27 08:59:49,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32421875 [2023-08-27 08:59:49,811 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3486 transitions. [2023-08-27 08:59:49,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3486 transitions. [2023-08-27 08:59:49,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:49,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3486 transitions. [2023-08-27 08:59:49,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 108.9375) internal successors, (3486), 32 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:49,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 336.0) internal successors, (11088), 33 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:49,818 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 336.0) internal successors, (11088), 33 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:49,818 INFO L175 Difference]: Start difference. First operand has 870 places, 4322 transitions, 145645 flow. Second operand 32 states and 3486 transitions. [2023-08-27 08:59:49,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 901 places, 5926 transitions, 214628 flow [2023-08-27 09:01:06,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 890 places, 5926 transitions, 211243 flow, removed 1634 selfloop flow, removed 11 redundant places. [2023-08-27 09:01:06,438 INFO L231 Difference]: Finished difference. Result has 904 places, 5389 transitions, 188037 flow [2023-08-27 09:01:06,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=143124, PETRI_DIFFERENCE_MINUEND_PLACES=859, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=188037, PETRI_PLACES=904, PETRI_TRANSITIONS=5389} [2023-08-27 09:01:06,441 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 881 predicate places. [2023-08-27 09:01:06,441 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 5389 transitions, 188037 flow [2023-08-27 09:01:06,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 103.45454545454545) internal successors, (3414), 33 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:06,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:01:06,441 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:01:06,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-27 09:01:06,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 09:01:06,642 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:01:06,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:01:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1205623770, now seen corresponding path program 37 times [2023-08-27 09:01:06,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:01:06,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473701243] [2023-08-27 09:01:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:01:06,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:01:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:01:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:01:08,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:01:08,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473701243] [2023-08-27 09:01:08,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473701243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:01:08,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503795461] [2023-08-27 09:01:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 09:01:08,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:01:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:01:08,154 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:01:08,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 09:01:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:01:08,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 09:01:08,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:01:08,558 INFO L322 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-08-27 09:01:08,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 48 [2023-08-27 09:01:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:01:08,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:01:09,113 INFO L322 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-27 09:01:09,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 182 treesize of output 322 [2023-08-27 09:01:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:01:10,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503795461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:01:10,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:01:10,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2023-08-27 09:01:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49606526] [2023-08-27 09:01:10,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:01:10,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 09:01:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:01:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 09:01:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2023-08-27 09:01:10,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 336 [2023-08-27 09:01:10,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 5389 transitions, 188037 flow. Second operand has 30 states, 30 states have (on average 103.7) internal successors, (3111), 30 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:10,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:01:10,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 336 [2023-08-27 09:01:10,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 09:01:17,712 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 09:01:17,712 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 09:01:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 09:01:17,775 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2023-08-27 09:01:17,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-27 09:01:17,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:01:17,981 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 102/336 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 56654 conditions, 4110 events (2072/4109 cut-off events. For 320942/320956 co-relation queries the response was YES. Maximal size of possible extension queue 1522. Compared 38569 event pairs, 140 based on Foata normal form. 3/5619 useless extension candidates. Maximal degree in co-relation 56377. Up to 2571 conditions per place.). [2023-08-27 09:01:17,982 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2023-08-27 09:01:17,982 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2023-08-27 09:01:17,982 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-27 09:01:17,982 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-27 09:01:17,982 INFO L445 BasicCegarLoop]: Path program histogram: [37, 5, 3, 2, 1, 1, 1, 1] [2023-08-27 09:01:17,984 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 09:01:17,984 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 09:01:17,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:01:17 BasicIcfg [2023-08-27 09:01:17,986 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 09:01:17,986 INFO L158 Benchmark]: Toolchain (without parser) took 824673.72ms. Allocated memory was 388.0MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 363.8MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-27 09:01:17,986 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 388.0MB. Free memory was 365.6MB in the beginning and 365.5MB in the end (delta: 82.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 09:01:17,986 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.26ms. Allocated memory is still 388.0MB. Free memory was 363.2MB in the beginning and 352.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 09:01:17,986 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.22ms. Allocated memory is still 388.0MB. Free memory was 352.1MB in the beginning and 350.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:01:17,986 INFO L158 Benchmark]: Boogie Preprocessor took 29.81ms. Allocated memory is still 388.0MB. Free memory was 350.0MB in the beginning and 348.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:01:17,987 INFO L158 Benchmark]: RCFGBuilder took 285.27ms. Allocated memory is still 388.0MB. Free memory was 348.5MB in the beginning and 331.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-27 09:01:17,987 INFO L158 Benchmark]: TraceAbstraction took 824102.58ms. Allocated memory was 388.0MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 331.2MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-27 09:01:17,987 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 388.0MB. Free memory was 365.6MB in the beginning and 365.5MB in the end (delta: 82.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 211.26ms. Allocated memory is still 388.0MB. Free memory was 363.2MB in the beginning and 352.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.22ms. Allocated memory is still 388.0MB. Free memory was 352.1MB in the beginning and 350.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.81ms. Allocated memory is still 388.0MB. Free memory was 350.0MB in the beginning and 348.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 285.27ms. Allocated memory is still 388.0MB. Free memory was 348.5MB in the beginning and 331.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 824102.58ms. Allocated memory was 388.0MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 331.2MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 145 PlacesBefore, 23 PlacesAfterwards, 152 TransitionsBefore, 19 TransitionsAfterwards, 1942 CoEnabledTransitionPairs, 7 FixpointIterations, 81 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 21 TrivialYvCompositions, 13 ConcurrentYvCompositions, 11 ChoiceCompositions, 173 TotalNumberOfCompositions, 1834 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1782, independent: 1773, independent conditional: 0, independent unconditional: 1773, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1091, independent: 1085, independent conditional: 0, independent unconditional: 1085, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1782, independent: 688, independent conditional: 0, independent unconditional: 688, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 1091, unknown conditional: 0, unknown unconditional: 1091] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 102/336 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 56654 conditions, 4110 events (2072/4109 cut-off events. For 320942/320956 co-relation queries the response was YES. Maximal size of possible extension queue 1522. Compared 38569 event pairs, 140 based on Foata normal form. 3/5619 useless extension candidates. Maximal degree in co-relation 56377. Up to 2571 conditions per place.). - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 102/336 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 56654 conditions, 4110 events (2072/4109 cut-off events. For 320942/320956 co-relation queries the response was YES. Maximal size of possible extension queue 1522. Compared 38569 event pairs, 140 based on Foata normal form. 3/5619 useless extension candidates. Maximal degree in co-relation 56377. Up to 2571 conditions per place.). - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 102/336 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 56654 conditions, 4110 events (2072/4109 cut-off events. For 320942/320956 co-relation queries the response was YES. Maximal size of possible extension queue 1522. Compared 38569 event pairs, 140 based on Foata normal form. 3/5619 useless extension candidates. Maximal degree in co-relation 56377. Up to 2571 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 102/336 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 56654 conditions, 4110 events (2072/4109 cut-off events. For 320942/320956 co-relation queries the response was YES. Maximal size of possible extension queue 1522. Compared 38569 event pairs, 140 based on Foata normal form. 3/5619 useless extension candidates. Maximal degree in co-relation 56377. Up to 2571 conditions per place.). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 102/336 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 56654 conditions, 4110 events (2072/4109 cut-off events. For 320942/320956 co-relation queries the response was YES. Maximal size of possible extension queue 1522. Compared 38569 event pairs, 140 based on Foata normal form. 3/5619 useless extension candidates. Maximal degree in co-relation 56377. Up to 2571 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 198 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 824.0s, OverallIterations: 51, TraceHistogramMax: 4, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.0s, AutomataDifference: 710.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 40 mSolverCounterUnknown, 5147 SdHoareTripleChecker+Valid, 43.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5147 mSDsluCounter, 543 SdHoareTripleChecker+Invalid, 40.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 266 IncrementalHoareTripleChecker+Unchecked, 382 mSDsCounter, 1068 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24084 IncrementalHoareTripleChecker+Invalid, 25458 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1068 mSolverCounterUnsat, 161 mSDtfsCounter, 24084 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3022 GetRequests, 1601 SyntacticMatches, 36 SemanticMatches, 1385 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13161 ImplicationChecksByTransitivity, 44.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=188037occurred in iteration=50, InterpolantAutomatonStates: 1053, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 95.9s InterpolantComputationTime, 1725 NumberOfCodeBlocks, 1710 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2385 ConstructedInterpolants, 16 QuantifiedInterpolants, 22321 SizeOfPredicates, 173 NumberOfNonLiveVariables, 8496 ConjunctsInSsa, 693 ConjunctsInUnsatCore, 132 InterpolantComputations, 11 PerfectInterpolantSequences, 539/1314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown