/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-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:54:15,906 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:54:15,983 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 08:54:15,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:54:15,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:54:16,023 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:54:16,024 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:54:16,024 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:54:16,025 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:54:16,028 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:54:16,029 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:54:16,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:54:16,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:54:16,030 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:54:16,031 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:54:16,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:54:16,031 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:54:16,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:54:16,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:54:16,032 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:54:16,032 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:54:16,033 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:54:16,033 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:54:16,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:54:16,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:54:16,034 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:54:16,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:54:16,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:54:16,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:54:16,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:54:16,036 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:54:16,036 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:54:16,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:54:16,037 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:54:16,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:54:16,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:54:16,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:54:16,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:54:16,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:54:16,401 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:54:16,401 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:54:16,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-27 08:54:17,665 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:54:17,851 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:54:17,852 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-27 08:54:17,859 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c3d9d745/b108fe6599274f9186070c8a1ae31cad/FLAG040df53f1 [2023-08-27 08:54:17,870 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c3d9d745/b108fe6599274f9186070c8a1ae31cad [2023-08-27 08:54:17,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:54:17,873 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:54:17,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:54:17,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:54:17,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:54:17,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:54:17" (1/1) ... [2023-08-27 08:54:17,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acbb7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:17, skipping insertion in model container [2023-08-27 08:54:17,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:54:17" (1/1) ... [2023-08-27 08:54:17,901 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:54:18,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:54:18,104 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:54:18,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:54:18,156 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:54:18,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18 WrapperNode [2023-08-27 08:54:18,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:54:18,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:54:18,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:54:18,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:54:18,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,180 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,208 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 162 [2023-08-27 08:54:18,208 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:54:18,208 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:54:18,209 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:54:18,209 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:54:18,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,219 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:54:18,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:54:18,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:54:18,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:54:18,234 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (1/1) ... [2023-08-27 08:54:18,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:54:18,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:18,262 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 08:54:18,270 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 08:54:18,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:54:18,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:54:18,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:54:18,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:54:18,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:54:18,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:54:18,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:54:18,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:54:18,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:54:18,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:54:18,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:54:18,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:54:18,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:54:18,293 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 08:54:18,373 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:54:18,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:54:18,701 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:54:18,708 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:54:18,709 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 08:54:18,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:54:18 BoogieIcfgContainer [2023-08-27 08:54:18,711 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:54:18,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:54:18,713 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:54:18,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:54:18,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:54:17" (1/3) ... [2023-08-27 08:54:18,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52327d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:54:18, skipping insertion in model container [2023-08-27 08:54:18,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:54:18" (2/3) ... [2023-08-27 08:54:18,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52327d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:54:18, skipping insertion in model container [2023-08-27 08:54:18,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:54:18" (3/3) ... [2023-08-27 08:54:18,722 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-08-27 08:54:18,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:54:18,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-27 08:54:18,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:54:18,839 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 08:54:18,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 394 flow [2023-08-27 08:54:18,965 INFO L124 PetriNetUnfolderBase]: 16/187 cut-off events. [2023-08-27 08:54:18,966 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:54:18,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 16/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 173 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-27 08:54:18,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 189 transitions, 394 flow [2023-08-27 08:54:18,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 178 transitions, 368 flow [2023-08-27 08:54:18,986 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:54:18,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 178 transitions, 368 flow [2023-08-27 08:54:19,000 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 178 transitions, 368 flow [2023-08-27 08:54:19,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 178 transitions, 368 flow [2023-08-27 08:54:19,034 INFO L124 PetriNetUnfolderBase]: 16/178 cut-off events. [2023-08-27 08:54:19,034 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:54:19,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 178 events. 16/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 152 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-27 08:54:19,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 3242 [2023-08-27 08:54:24,082 INFO L134 LiptonReduction]: Checked pairs total: 3260 [2023-08-27 08:54:24,082 INFO L136 LiptonReduction]: Total number of compositions: 220 [2023-08-27 08:54:24,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:54:24,106 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;@5d286dc8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:54:24,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-27 08:54:24,113 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:54:24,114 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:54:24,114 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:54:24,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:24,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:54:24,115 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 08:54:24,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash 24808, now seen corresponding path program 1 times [2023-08-27 08:54:24,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:24,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781662942] [2023-08-27 08:54:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:24,315 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 08:54:24,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:24,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781662942] [2023-08-27 08:54:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781662942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:24,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:54:24,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:54:24,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344182443] [2023-08-27 08:54:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:24,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:54:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:24,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:54:24,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:54:24,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2023-08-27 08:54:24,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:24,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2023-08-27 08:54:24,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:24,432 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-27 08:54:24,432 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 08:54:24,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 178 event pairs, 18 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 120. Up to 74 conditions per place. [2023-08-27 08:54:24,434 INFO L140 encePairwiseOnDemand]: 406/409 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-27 08:54:24,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 80 flow [2023-08-27 08:54:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:54:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:54:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-27 08:54:24,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123879380603097 [2023-08-27 08:54:24,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-27 08:54:24,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-27 08:54:24,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:24,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-27 08:54:24,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,477 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 506 transitions. [2023-08-27 08:54:24,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 80 flow [2023-08-27 08:54:24,480 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 08:54:24,482 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 44 flow [2023-08-27 08:54:24,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, 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 08:54:24,487 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-08-27 08:54:24,487 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 44 flow [2023-08-27 08:54:24,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:24,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:54:24,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:54:24,489 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 08:54:24,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash 24823, now seen corresponding path program 1 times [2023-08-27 08:54:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:24,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276763603] [2023-08-27 08:54:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:24,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:24,595 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 08:54:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276763603] [2023-08-27 08:54:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276763603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:24,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:54:24,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:54:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588262497] [2023-08-27 08:54:24,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:24,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:54:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:24,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:54:24,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:54:24,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2023-08-27 08:54:24,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:24,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2023-08-27 08:54:24,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:24,637 INFO L124 PetriNetUnfolderBase]: 46/82 cut-off events. [2023-08-27 08:54:24,638 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:54:24,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 82 events. 46/82 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 181 event pairs, 18 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 152. Up to 78 conditions per place. [2023-08-27 08:54:24,639 INFO L140 encePairwiseOnDemand]: 405/409 looper letters, 15 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2023-08-27 08:54:24,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 86 flow [2023-08-27 08:54:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:54:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:54:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-27 08:54:24,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41401792991035047 [2023-08-27 08:54:24,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-27 08:54:24,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-27 08:54:24,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:24,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-27 08:54:24,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,652 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 44 flow. Second operand 3 states and 508 transitions. [2023-08-27 08:54:24,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 86 flow [2023-08-27 08:54:24,652 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 08:54:24,653 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-08-27 08:54:24,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, 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 08:54:24,654 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2023-08-27 08:54:24,654 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-08-27 08:54:24,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:24,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:54:24,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 08:54:24,655 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 08:54:24,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash 770962, now seen corresponding path program 1 times [2023-08-27 08:54:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836559467] [2023-08-27 08:54:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:24,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:24,771 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 08:54:24,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836559467] [2023-08-27 08:54:24,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836559467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:54:24,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388287576] [2023-08-27 08:54:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:24,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:24,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:24,777 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 08:54:24,852 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 08:54:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:24,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:54:24,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:54:24,945 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 08:54:24,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:54:24,971 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 08:54:24,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388287576] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:54:24,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:54:24,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 08:54:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904148525] [2023-08-27 08:54:24,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:54:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:54:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:54:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:54:24,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2023-08-27 08:54:24,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:24,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:24,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2023-08-27 08:54:24,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:25,038 INFO L124 PetriNetUnfolderBase]: 49/88 cut-off events. [2023-08-27 08:54:25,039 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:54:25,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 88 events. 49/88 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 198 event pairs, 18 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 152. Up to 81 conditions per place. [2023-08-27 08:54:25,040 INFO L140 encePairwiseOnDemand]: 405/409 looper letters, 15 selfloop transitions, 9 changer transitions 0/26 dead transitions. [2023-08-27 08:54:25,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 131 flow [2023-08-27 08:54:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:54:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:54:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1005 transitions. [2023-08-27 08:54:25,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095354523227384 [2023-08-27 08:54:25,043 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1005 transitions. [2023-08-27 08:54:25,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1005 transitions. [2023-08-27 08:54:25,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:25,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1005 transitions. [2023-08-27 08:54:25,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.5) internal successors, (1005), 6 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,053 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 6 states and 1005 transitions. [2023-08-27 08:54:25,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 131 flow [2023-08-27 08:54:25,054 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 08:54:25,055 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 115 flow [2023-08-27 08:54:25,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, 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 08:54:25,056 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-08-27 08:54:25,056 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 115 flow [2023-08-27 08:54:25,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:25,057 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:54:25,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 08:54:25,262 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 08:54:25,263 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 08:54:25,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1494331319, now seen corresponding path program 2 times [2023-08-27 08:54:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492180524] [2023-08-27 08:54:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:25,369 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 08:54:25,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:25,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492180524] [2023-08-27 08:54:25,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492180524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:54:25,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848167473] [2023-08-27 08:54:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:54:25,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:25,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:25,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:54:25,390 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 08:54:25,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:54:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:54:25,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:54:25,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:54:25,464 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 08:54:25,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:54:25,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848167473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:25,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:54:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:54:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317076752] [2023-08-27 08:54:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:54:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:54:25,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:54:25,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 409 [2023-08-27 08:54:25,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:25,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 409 [2023-08-27 08:54:25,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:25,512 INFO L124 PetriNetUnfolderBase]: 49/87 cut-off events. [2023-08-27 08:54:25,512 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:54:25,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 87 events. 49/87 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 197 event pairs, 18 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 178. Up to 83 conditions per place. [2023-08-27 08:54:25,513 INFO L140 encePairwiseOnDemand]: 407/409 looper letters, 22 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-27 08:54:25,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 151 flow [2023-08-27 08:54:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:54:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:54:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-27 08:54:25,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41401792991035047 [2023-08-27 08:54:25,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-27 08:54:25,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-27 08:54:25,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:25,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-27 08:54:25,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,521 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 115 flow. Second operand 3 states and 508 transitions. [2023-08-27 08:54:25,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 151 flow [2023-08-27 08:54:25,523 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 08:54:25,523 INFO L231 Difference]: Finished difference. Result has 24 places, 25 transitions, 70 flow [2023-08-27 08:54:25,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, 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 08:54:25,525 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1 predicate places. [2023-08-27 08:54:25,525 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 25 transitions, 70 flow [2023-08-27 08:54:25,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:25,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:25,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 08:54:25,734 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 08:54:25,735 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 08:54:25,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -965005093, now seen corresponding path program 1 times [2023-08-27 08:54:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:25,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938102672] [2023-08-27 08:54:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:25,833 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 08:54:25,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:25,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938102672] [2023-08-27 08:54:25,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938102672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:25,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:54:25,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:54:25,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96007536] [2023-08-27 08:54:25,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:25,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:54:25,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:54:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:54:25,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 409 [2023-08-27 08:54:25,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:25,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 409 [2023-08-27 08:54:25,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:25,878 INFO L124 PetriNetUnfolderBase]: 48/86 cut-off events. [2023-08-27 08:54:25,878 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:54:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 86 events. 48/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 186 event pairs, 18 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 175. Up to 82 conditions per place. [2023-08-27 08:54:25,880 INFO L140 encePairwiseOnDemand]: 406/409 looper letters, 20 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-27 08:54:25,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 110 flow [2023-08-27 08:54:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:54:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:54:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-27 08:54:25,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026079869600652 [2023-08-27 08:54:25,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-27 08:54:25,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-27 08:54:25,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:25,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-27 08:54:25,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,887 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 70 flow. Second operand 3 states and 494 transitions. [2023-08-27 08:54:25,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 110 flow [2023-08-27 08:54:25,888 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 08:54:25,888 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 69 flow [2023-08-27 08:54:25,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, 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 08:54:25,890 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-08-27 08:54:25,890 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 69 flow [2023-08-27 08:54:25,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:25,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:25,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:25,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 08:54:25,895 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 08:54:25,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:25,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1613200650, now seen corresponding path program 1 times [2023-08-27 08:54:25,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:25,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411005489] [2023-08-27 08:54:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:25,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:26,029 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 08:54:26,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:26,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411005489] [2023-08-27 08:54:26,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411005489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:26,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:54:26,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:54:26,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197634135] [2023-08-27 08:54:26,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:26,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:54:26,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:54:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:54:26,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 409 [2023-08-27 08:54:26,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:26,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 409 [2023-08-27 08:54:26,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:26,078 INFO L124 PetriNetUnfolderBase]: 69/123 cut-off events. [2023-08-27 08:54:26,078 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:54:26,078 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 324 event pairs, 9 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 252. Up to 85 conditions per place. [2023-08-27 08:54:26,079 INFO L140 encePairwiseOnDemand]: 405/409 looper letters, 28 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2023-08-27 08:54:26,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 156 flow [2023-08-27 08:54:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:54:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:54:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-27 08:54:26,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952730236348818 [2023-08-27 08:54:26,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-27 08:54:26,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-27 08:54:26,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:26,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-27 08:54:26,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,085 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 69 flow. Second operand 3 states and 485 transitions. [2023-08-27 08:54:26,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 156 flow [2023-08-27 08:54:26,085 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 08:54:26,086 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 84 flow [2023-08-27 08:54:26,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, 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 08:54:26,087 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-08-27 08:54:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 84 flow [2023-08-27 08:54:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:26,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 08:54:26,088 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 08:54:26,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 274004070, now seen corresponding path program 1 times [2023-08-27 08:54:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:26,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990783895] [2023-08-27 08:54:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:26,202 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 08:54:26,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:26,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990783895] [2023-08-27 08:54:26,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990783895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:26,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:54:26,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 08:54:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138400671] [2023-08-27 08:54:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:26,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:54:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:54:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:54:26,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 409 [2023-08-27 08:54:26,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:26,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 409 [2023-08-27 08:54:26,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:26,281 INFO L124 PetriNetUnfolderBase]: 77/149 cut-off events. [2023-08-27 08:54:26,281 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-27 08:54:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 149 events. 77/149 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 491 event pairs, 21 based on Foata normal form. 8/154 useless extension candidates. Maximal degree in co-relation 353. Up to 89 conditions per place. [2023-08-27 08:54:26,282 INFO L140 encePairwiseOnDemand]: 405/409 looper letters, 35 selfloop transitions, 4 changer transitions 2/42 dead transitions. [2023-08-27 08:54:26,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 211 flow [2023-08-27 08:54:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:54:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:54:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2023-08-27 08:54:26,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132029339853301 [2023-08-27 08:54:26,284 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2023-08-27 08:54:26,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2023-08-27 08:54:26,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:26,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2023-08-27 08:54:26,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 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 08:54:26,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,289 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,289 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 84 flow. Second operand 4 states and 676 transitions. [2023-08-27 08:54:26,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 211 flow [2023-08-27 08:54:26,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:54:26,290 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 108 flow [2023-08-27 08:54:26,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, 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=4, PETRI_FLOW=108, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-08-27 08:54:26,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2023-08-27 08:54:26,291 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 108 flow [2023-08-27 08:54:26,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:26,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:26,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 08:54:26,292 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 08:54:26,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash 197714321, now seen corresponding path program 1 times [2023-08-27 08:54:26,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:26,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269815233] [2023-08-27 08:54:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:26,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:26,389 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 08:54:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:26,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269815233] [2023-08-27 08:54:26,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269815233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:26,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:54:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:54:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003619112] [2023-08-27 08:54:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:26,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:54:26,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:54:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:54:26,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 409 [2023-08-27 08:54:26,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:26,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 409 [2023-08-27 08:54:26,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:26,512 INFO L124 PetriNetUnfolderBase]: 88/163 cut-off events. [2023-08-27 08:54:26,513 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-08-27 08:54:26,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 163 events. 88/163 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 488 event pairs, 2 based on Foata normal form. 10/172 useless extension candidates. Maximal degree in co-relation 470. Up to 72 conditions per place. [2023-08-27 08:54:26,514 INFO L140 encePairwiseOnDemand]: 403/409 looper letters, 40 selfloop transitions, 8 changer transitions 4/52 dead transitions. [2023-08-27 08:54:26,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 286 flow [2023-08-27 08:54:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:54:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:54:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 959 transitions. [2023-08-27 08:54:26,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39079054604726976 [2023-08-27 08:54:26,517 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 959 transitions. [2023-08-27 08:54:26,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 959 transitions. [2023-08-27 08:54:26,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:26,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 959 transitions. [2023-08-27 08:54:26,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,523 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,524 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 108 flow. Second operand 6 states and 959 transitions. [2023-08-27 08:54:26,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 286 flow [2023-08-27 08:54:26,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 52 transitions, 272 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-27 08:54:26,526 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 139 flow [2023-08-27 08:54:26,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-27 08:54:26,527 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2023-08-27 08:54:26,527 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 139 flow [2023-08-27 08:54:26,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:26,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:26,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 08:54:26,528 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 08:54:26,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1615672701, now seen corresponding path program 2 times [2023-08-27 08:54:26,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:26,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682256448] [2023-08-27 08:54:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:26,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:26,597 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 08:54:26,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682256448] [2023-08-27 08:54:26,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682256448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:26,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:54:26,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 08:54:26,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345173680] [2023-08-27 08:54:26,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:26,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:54:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:26,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:54:26,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:54:26,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 409 [2023-08-27 08:54:26,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:26,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 409 [2023-08-27 08:54:26,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:26,671 INFO L124 PetriNetUnfolderBase]: 75/142 cut-off events. [2023-08-27 08:54:26,671 INFO L125 PetriNetUnfolderBase]: For 169/176 co-relation queries the response was YES. [2023-08-27 08:54:26,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 142 events. 75/142 cut-off events. For 169/176 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 369 event pairs, 22 based on Foata normal form. 11/152 useless extension candidates. Maximal degree in co-relation 448. Up to 97 conditions per place. [2023-08-27 08:54:26,672 INFO L140 encePairwiseOnDemand]: 405/409 looper letters, 36 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2023-08-27 08:54:26,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 277 flow [2023-08-27 08:54:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:54:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:54:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 650 transitions. [2023-08-27 08:54:26,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973105134474328 [2023-08-27 08:54:26,675 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 650 transitions. [2023-08-27 08:54:26,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 650 transitions. [2023-08-27 08:54:26,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:26,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 650 transitions. [2023-08-27 08:54:26,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.5) internal successors, (650), 4 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,679 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,679 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 139 flow. Second operand 4 states and 650 transitions. [2023-08-27 08:54:26,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 277 flow [2023-08-27 08:54:26,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 262 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-27 08:54:26,682 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 167 flow [2023-08-27 08:54:26,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-27 08:54:26,682 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 15 predicate places. [2023-08-27 08:54:26,682 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 167 flow [2023-08-27 08:54:26,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:26,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:54:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 08:54:26,683 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 08:54:26,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1554755003, now seen corresponding path program 3 times [2023-08-27 08:54:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:26,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128029845] [2023-08-27 08:54:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:26,774 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 08:54:26,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:26,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128029845] [2023-08-27 08:54:26,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128029845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:54:26,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886129142] [2023-08-27 08:54:26,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:54:26,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:26,777 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 08:54:26,787 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 08:54:26,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:54:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:54:26,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:54:26,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:54:26,949 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 08:54:26,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:54:26,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886129142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:54:26,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:54:26,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-08-27 08:54:26,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964645168] [2023-08-27 08:54:26,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:54:26,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:54:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:54:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:54:26,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 409 [2023-08-27 08:54:26,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:26,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:26,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 409 [2023-08-27 08:54:26,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:27,016 INFO L124 PetriNetUnfolderBase]: 77/142 cut-off events. [2023-08-27 08:54:27,016 INFO L125 PetriNetUnfolderBase]: For 298/305 co-relation queries the response was YES. [2023-08-27 08:54:27,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 142 events. 77/142 cut-off events. For 298/305 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 361 event pairs, 22 based on Foata normal form. 13/154 useless extension candidates. Maximal degree in co-relation 540. Up to 103 conditions per place. [2023-08-27 08:54:27,018 INFO L140 encePairwiseOnDemand]: 405/409 looper letters, 33 selfloop transitions, 9 changer transitions 1/45 dead transitions. [2023-08-27 08:54:27,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 308 flow [2023-08-27 08:54:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:54:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:54:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 650 transitions. [2023-08-27 08:54:27,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973105134474328 [2023-08-27 08:54:27,020 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 650 transitions. [2023-08-27 08:54:27,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 650 transitions. [2023-08-27 08:54:27,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:27,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 650 transitions. [2023-08-27 08:54:27,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.5) internal successors, (650), 4 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:27,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:27,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:27,025 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 167 flow. Second operand 4 states and 650 transitions. [2023-08-27 08:54:27,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 308 flow [2023-08-27 08:54:27,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 285 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-27 08:54:27,027 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 192 flow [2023-08-27 08:54:27,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-08-27 08:54:27,028 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 18 predicate places. [2023-08-27 08:54:27,028 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 192 flow [2023-08-27 08:54:27,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:27,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:27,028 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 08:54:27,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 08:54:27,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:27,234 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 08:54:27,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:27,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1898997705, now seen corresponding path program 1 times [2023-08-27 08:54:27,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:27,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474060724] [2023-08-27 08:54:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:27,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:27,388 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 08:54:27,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:27,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474060724] [2023-08-27 08:54:27,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474060724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:54:27,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371315776] [2023-08-27 08:54:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:27,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:27,393 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 08:54:27,396 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 08:54:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:27,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 08:54:27,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:54:27,546 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 08:54:27,598 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 08:54:27,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:54:27,676 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 08:54:27,772 INFO L322 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2023-08-27 08:54:27,773 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 71 treesize of output 55 [2023-08-27 08:54:27,816 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 08:54:27,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:54:28,071 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:28,071 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 293 treesize of output 173 [2023-08-27 08:54:28,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:28,142 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 1224 treesize of output 1064 [2023-08-27 08:54:28,252 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:28,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 260 [2023-08-27 08:54:28,330 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:28,331 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 145 [2023-08-27 08:54:32,132 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 08:54:32,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371315776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:54:32,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:54:32,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2023-08-27 08:54:32,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289825547] [2023-08-27 08:54:32,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:54:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 08:54:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 08:54:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=163, Unknown=7, NotChecked=0, Total=210 [2023-08-27 08:54:32,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 409 [2023-08-27 08:54:32,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 192 flow. Second operand has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:32,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:32,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 409 [2023-08-27 08:54:32,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:32,828 INFO L124 PetriNetUnfolderBase]: 211/376 cut-off events. [2023-08-27 08:54:32,828 INFO L125 PetriNetUnfolderBase]: For 678/714 co-relation queries the response was YES. [2023-08-27 08:54:32,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1452 conditions, 376 events. 211/376 cut-off events. For 678/714 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1405 event pairs, 16 based on Foata normal form. 44/415 useless extension candidates. Maximal degree in co-relation 1435. Up to 177 conditions per place. [2023-08-27 08:54:32,831 INFO L140 encePairwiseOnDemand]: 401/409 looper letters, 40 selfloop transitions, 14 changer transitions 59/115 dead transitions. [2023-08-27 08:54:32,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 115 transitions, 809 flow [2023-08-27 08:54:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:54:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:54:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2080 transitions. [2023-08-27 08:54:32,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28253192067372995 [2023-08-27 08:54:32,839 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2080 transitions. [2023-08-27 08:54:32,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2080 transitions. [2023-08-27 08:54:32,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:54:32,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2080 transitions. [2023-08-27 08:54:32,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.55555555555556) internal successors, (2080), 18 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:32,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 409.0) internal successors, (7771), 19 states have internal predecessors, (7771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:32,854 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 409.0) internal successors, (7771), 19 states have internal predecessors, (7771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:32,855 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 192 flow. Second operand 18 states and 2080 transitions. [2023-08-27 08:54:32,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 115 transitions, 809 flow [2023-08-27 08:54:32,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 115 transitions, 769 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-27 08:54:32,860 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 268 flow [2023-08-27 08:54:32,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=174, 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=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=268, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-08-27 08:54:32,860 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 39 predicate places. [2023-08-27 08:54:32,861 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 268 flow [2023-08-27 08:54:32,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:32,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:54:32,861 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 08:54:32,876 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 08:54:33,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:33,068 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 08:54:33,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:54:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash -721642489, now seen corresponding path program 2 times [2023-08-27 08:54:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:54:33,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428770959] [2023-08-27 08:54:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:54:33,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:54:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:54:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:54:33,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:54:33,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428770959] [2023-08-27 08:54:33,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428770959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:54:33,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959546131] [2023-08-27 08:54:33,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:54:33,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:54:33,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:54:33,249 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 08:54:33,272 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 08:54:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:54:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:54:33,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 08:54:33,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:54:33,445 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 08:54:33,476 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 08:54:33,517 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 08:54:33,674 INFO L322 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-08-27 08:54:33,675 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 79 treesize of output 48 [2023-08-27 08:54:33,720 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 08:54:33,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:54:34,201 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:34,202 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 490 treesize of output 286 [2023-08-27 08:54:34,298 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:34,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 756 treesize of output 796 [2023-08-27 08:54:34,468 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:34,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 612 treesize of output 580 [2023-08-27 08:54:34,694 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:54:34,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 325 [2023-08-27 08:54:46,731 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 08:54:47,212 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 08:54:47,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959546131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:54:47,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:54:47,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-08-27 08:54:47,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280543063] [2023-08-27 08:54:47,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:54:47,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:54:47,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:54:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:54:47,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=342, Unknown=2, NotChecked=0, Total=420 [2023-08-27 08:54:47,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 409 [2023-08-27 08:54:47,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 268 flow. Second operand has 21 states, 21 states have (on average 112.52380952380952) internal successors, (2363), 21 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:54:47,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:54:47,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 409 [2023-08-27 08:54:47,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:54:53,694 WARN L234 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:55:00,067 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:55:00,878 INFO L124 PetriNetUnfolderBase]: 282/500 cut-off events. [2023-08-27 08:55:00,878 INFO L125 PetriNetUnfolderBase]: For 2130/2166 co-relation queries the response was YES. [2023-08-27 08:55:00,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 500 events. 282/500 cut-off events. For 2130/2166 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1967 event pairs, 6 based on Foata normal form. 63/562 useless extension candidates. Maximal degree in co-relation 2514. Up to 249 conditions per place. [2023-08-27 08:55:00,883 INFO L140 encePairwiseOnDemand]: 400/409 looper letters, 95 selfloop transitions, 61 changer transitions 1/159 dead transitions. [2023-08-27 08:55:00,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 159 transitions, 1360 flow [2023-08-27 08:55:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 08:55:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 08:55:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2997 transitions. [2023-08-27 08:55:00,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2818318600714689 [2023-08-27 08:55:00,900 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2997 transitions. [2023-08-27 08:55:00,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2997 transitions. [2023-08-27 08:55:00,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:55:00,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2997 transitions. [2023-08-27 08:55:00,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 115.26923076923077) internal successors, (2997), 26 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:00,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 409.0) internal successors, (11043), 27 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:00,935 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 409.0) internal successors, (11043), 27 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:00,935 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 268 flow. Second operand 26 states and 2997 transitions. [2023-08-27 08:55:00,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 159 transitions, 1360 flow [2023-08-27 08:55:00,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 159 transitions, 1201 flow, removed 63 selfloop flow, removed 11 redundant places. [2023-08-27 08:55:00,945 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 856 flow [2023-08-27 08:55:00,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=856, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2023-08-27 08:55:00,946 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 51 predicate places. [2023-08-27 08:55:00,946 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 856 flow [2023-08-27 08:55:00,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 112.52380952380952) internal successors, (2363), 21 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:00,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:55:00,947 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 08:55:00,955 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 08:55:01,153 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,SelfDestructingSolverStorable11 [2023-08-27 08:55:01,153 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 08:55:01,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:55:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1597934464, now seen corresponding path program 3 times [2023-08-27 08:55:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:55:01,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223786936] [2023-08-27 08:55:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:55:01,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:55:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:55:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:55:01,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223786936] [2023-08-27 08:55:01,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223786936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:55:01,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706144894] [2023-08-27 08:55:01,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:55:01,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:01,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:55:01,392 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 08:55:01,393 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 08:55:01,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 08:55:01,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:55:01,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:55:01,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:55:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:55:01,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:55:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:55:01,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706144894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:55:01,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:55:01,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-27 08:55:01,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822978660] [2023-08-27 08:55:01,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:55:01,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:55:01,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:55:01,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:55:01,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:55:01,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 409 [2023-08-27 08:55:01,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 856 flow. Second operand has 12 states, 12 states have (on average 163.33333333333334) internal successors, (1960), 12 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:01,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:55:01,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 409 [2023-08-27 08:55:01,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:55:02,030 INFO L124 PetriNetUnfolderBase]: 264/462 cut-off events. [2023-08-27 08:55:02,030 INFO L125 PetriNetUnfolderBase]: For 2564/2588 co-relation queries the response was YES. [2023-08-27 08:55:02,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2621 conditions, 462 events. 264/462 cut-off events. For 2564/2588 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1742 event pairs, 36 based on Foata normal form. 46/503 useless extension candidates. Maximal degree in co-relation 2595. Up to 239 conditions per place. [2023-08-27 08:55:02,035 INFO L140 encePairwiseOnDemand]: 405/409 looper letters, 80 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2023-08-27 08:55:02,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 1314 flow [2023-08-27 08:55:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:55:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:55:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2023-08-27 08:55:02,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40936081033880545 [2023-08-27 08:55:02,039 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2023-08-27 08:55:02,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2023-08-27 08:55:02,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:55:02,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2023-08-27 08:55:02,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:02,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:02,045 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:02,046 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 856 flow. Second operand 7 states and 1172 transitions. [2023-08-27 08:55:02,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 1314 flow [2023-08-27 08:55:02,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 116 transitions, 1053 flow, removed 98 selfloop flow, removed 10 redundant places. [2023-08-27 08:55:02,056 INFO L231 Difference]: Finished difference. Result has 71 places, 89 transitions, 711 flow [2023-08-27 08:55:02,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=71, PETRI_TRANSITIONS=89} [2023-08-27 08:55:02,057 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2023-08-27 08:55:02,057 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 89 transitions, 711 flow [2023-08-27 08:55:02,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.33333333333334) internal successors, (1960), 12 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:02,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:55:02,058 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 08:55:02,068 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 08:55:02,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:02,268 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 08:55:02,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:55:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash 963051281, now seen corresponding path program 4 times [2023-08-27 08:55:02,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:55:02,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144543482] [2023-08-27 08:55:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:55:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:55:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:55:04,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:55:04,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144543482] [2023-08-27 08:55:04,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144543482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:55:04,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940076096] [2023-08-27 08:55:04,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:55:04,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:04,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:55:04,917 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 08:55:04,942 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 08:55:05,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:55:05,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:55:05,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 08:55:05,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:55:05,262 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:55:05,263 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 08:55:05,295 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 08:55:05,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:55:05,811 INFO L322 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-27 08:55:05,812 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 08:55:06,544 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 08:55:06,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940076096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:55:06,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:55:06,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-08-27 08:55:06,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249585964] [2023-08-27 08:55:06,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:55:06,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 08:55:06,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:55:06,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 08:55:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-08-27 08:55:06,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 409 [2023-08-27 08:55:06,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 89 transitions, 711 flow. Second operand has 23 states, 23 states have (on average 128.82608695652175) internal successors, (2963), 23 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:06,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:55:06,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 409 [2023-08-27 08:55:06,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:55:08,204 INFO L124 PetriNetUnfolderBase]: 552/984 cut-off events. [2023-08-27 08:55:08,205 INFO L125 PetriNetUnfolderBase]: For 5072/5140 co-relation queries the response was YES. [2023-08-27 08:55:08,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5421 conditions, 984 events. 552/984 cut-off events. For 5072/5140 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4567 event pairs, 32 based on Foata normal form. 56/1035 useless extension candidates. Maximal degree in co-relation 5396. Up to 374 conditions per place. [2023-08-27 08:55:08,214 INFO L140 encePairwiseOnDemand]: 402/409 looper letters, 127 selfloop transitions, 107 changer transitions 9/249 dead transitions. [2023-08-27 08:55:08,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 249 transitions, 2509 flow [2023-08-27 08:55:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 08:55:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 08:55:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3339 transitions. [2023-08-27 08:55:08,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3265525672371638 [2023-08-27 08:55:08,223 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3339 transitions. [2023-08-27 08:55:08,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3339 transitions. [2023-08-27 08:55:08,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:55:08,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3339 transitions. [2023-08-27 08:55:08,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 133.56) internal successors, (3339), 25 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:08,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 409.0) internal successors, (10634), 26 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:08,243 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 409.0) internal successors, (10634), 26 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:08,243 INFO L175 Difference]: Start difference. First operand has 71 places, 89 transitions, 711 flow. Second operand 25 states and 3339 transitions. [2023-08-27 08:55:08,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 249 transitions, 2509 flow [2023-08-27 08:55:08,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 249 transitions, 2401 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-08-27 08:55:08,257 INFO L231 Difference]: Finished difference. Result has 96 places, 157 transitions, 1781 flow [2023-08-27 08:55:08,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1781, PETRI_PLACES=96, PETRI_TRANSITIONS=157} [2023-08-27 08:55:08,258 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 73 predicate places. [2023-08-27 08:55:08,258 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 157 transitions, 1781 flow [2023-08-27 08:55:08,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 128.82608695652175) internal successors, (2963), 23 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:08,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:55:08,259 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 08:55:08,271 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 08:55:08,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:08,465 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 08:55:08,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:55:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1265230909, now seen corresponding path program 5 times [2023-08-27 08:55:08,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:55:08,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758536713] [2023-08-27 08:55:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:55:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:55:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:55:13,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:55:13,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758536713] [2023-08-27 08:55:13,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758536713] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:55:13,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126256908] [2023-08-27 08:55:13,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:55:13,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:13,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:55:13,077 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 08:55:13,087 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 08:55:13,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 08:55:13,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:55:13,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 08:55:13,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:55:13,505 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:55:13,594 INFO L322 Elim1Store]: treesize reduction 169, result has 27.2 percent of original size [2023-08-27 08:55:13,594 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 99 [2023-08-27 08:55:13,648 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 08:55:13,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:55:14,110 INFO L322 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-27 08:55:14,111 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 08:55:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:55:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126256908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:55:14,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:55:14,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-27 08:55:14,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036554285] [2023-08-27 08:55:14,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:55:14,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 08:55:14,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:55:14,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 08:55:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2023-08-27 08:55:14,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 409 [2023-08-27 08:55:14,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 157 transitions, 1781 flow. Second operand has 24 states, 24 states have (on average 121.91666666666667) internal successors, (2926), 24 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:14,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:55:14,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 409 [2023-08-27 08:55:14,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:55:16,862 INFO L124 PetriNetUnfolderBase]: 866/1543 cut-off events. [2023-08-27 08:55:16,863 INFO L125 PetriNetUnfolderBase]: For 9558/9614 co-relation queries the response was YES. [2023-08-27 08:55:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8628 conditions, 1543 events. 866/1543 cut-off events. For 9558/9614 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8094 event pairs, 110 based on Foata normal form. 45/1583 useless extension candidates. Maximal degree in co-relation 8596. Up to 917 conditions per place. [2023-08-27 08:55:16,878 INFO L140 encePairwiseOnDemand]: 402/409 looper letters, 179 selfloop transitions, 96 changer transitions 9/290 dead transitions. [2023-08-27 08:55:16,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 290 transitions, 3381 flow [2023-08-27 08:55:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:55:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:55:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3016 transitions. [2023-08-27 08:55:16,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3072534637326813 [2023-08-27 08:55:16,884 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3016 transitions. [2023-08-27 08:55:16,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3016 transitions. [2023-08-27 08:55:16,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:55:16,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3016 transitions. [2023-08-27 08:55:16,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 125.66666666666667) internal successors, (3016), 24 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:16,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:16,901 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:16,901 INFO L175 Difference]: Start difference. First operand has 96 places, 157 transitions, 1781 flow. Second operand 24 states and 3016 transitions. [2023-08-27 08:55:16,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 290 transitions, 3381 flow [2023-08-27 08:55:16,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 290 transitions, 2952 flow, removed 194 selfloop flow, removed 6 redundant places. [2023-08-27 08:55:16,932 INFO L231 Difference]: Finished difference. Result has 119 places, 213 transitions, 2304 flow [2023-08-27 08:55:16,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2304, PETRI_PLACES=119, PETRI_TRANSITIONS=213} [2023-08-27 08:55:16,932 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 96 predicate places. [2023-08-27 08:55:16,932 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 213 transitions, 2304 flow [2023-08-27 08:55:16,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 121.91666666666667) internal successors, (2926), 24 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:16,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:55:16,934 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 08:55:16,940 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 08:55:17,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 08:55:17,140 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 08:55:17,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:55:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1442391433, now seen corresponding path program 6 times [2023-08-27 08:55:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:55:17,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180873979] [2023-08-27 08:55:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:55:17,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:55:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:55:18,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:55:18,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180873979] [2023-08-27 08:55:18,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180873979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:55:18,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276397618] [2023-08-27 08:55:18,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:55:18,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:55:18,770 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 08:55:18,773 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 08:55:18,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:55:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:55:18,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:55:18,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:55:19,122 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:55:19,123 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 08:55:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:55:19,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:55:19,641 INFO L322 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-27 08:55:19,645 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 08:55:20,274 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 08:55:20,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276397618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:55:20,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:55:20,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 20 [2023-08-27 08:55:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339217953] [2023-08-27 08:55:20,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:55:20,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:55:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:55:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:55:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-27 08:55:20,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 409 [2023-08-27 08:55:20,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 213 transitions, 2304 flow. Second operand has 22 states, 22 states have (on average 129.04545454545453) internal successors, (2839), 22 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:55:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 409 [2023-08-27 08:55:20,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:55:21,797 INFO L124 PetriNetUnfolderBase]: 1126/2016 cut-off events. [2023-08-27 08:55:21,797 INFO L125 PetriNetUnfolderBase]: For 10756/10813 co-relation queries the response was YES. [2023-08-27 08:55:21,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10944 conditions, 2016 events. 1126/2016 cut-off events. For 10756/10813 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11257 event pairs, 194 based on Foata normal form. 44/2054 useless extension candidates. Maximal degree in co-relation 10907. Up to 1266 conditions per place. [2023-08-27 08:55:21,817 INFO L140 encePairwiseOnDemand]: 402/409 looper letters, 237 selfloop transitions, 81 changer transitions 5/329 dead transitions. [2023-08-27 08:55:21,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 329 transitions, 3891 flow [2023-08-27 08:55:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 08:55:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 08:55:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3310 transitions. [2023-08-27 08:55:21,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237163814180929 [2023-08-27 08:55:21,823 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3310 transitions. [2023-08-27 08:55:21,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3310 transitions. [2023-08-27 08:55:21,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:55:21,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3310 transitions. [2023-08-27 08:55:21,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 132.4) internal successors, (3310), 25 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:21,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 409.0) internal successors, (10634), 26 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:21,838 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 409.0) internal successors, (10634), 26 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:21,838 INFO L175 Difference]: Start difference. First operand has 119 places, 213 transitions, 2304 flow. Second operand 25 states and 3310 transitions. [2023-08-27 08:55:21,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 329 transitions, 3891 flow [2023-08-27 08:55:21,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 329 transitions, 3744 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-27 08:55:21,879 INFO L231 Difference]: Finished difference. Result has 141 places, 243 transitions, 2872 flow [2023-08-27 08:55:21,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2872, PETRI_PLACES=141, PETRI_TRANSITIONS=243} [2023-08-27 08:55:21,880 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2023-08-27 08:55:21,880 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 243 transitions, 2872 flow [2023-08-27 08:55:21,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 129.04545454545453) internal successors, (2839), 22 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:55:21,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:55:21,881 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 08:55:21,887 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 08:55:22,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 08:55:22,087 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 08:55:22,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:55:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2129020799, now seen corresponding path program 7 times [2023-08-27 08:55:22,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:55:22,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545029458] [2023-08-27 08:55:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:55:22,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:55:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:55:23,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:55:23,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545029458] [2023-08-27 08:55:23,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545029458] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:55:23,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54312982] [2023-08-27 08:55:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:55:23,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:55:23,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:55:23,943 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 08:55:23,946 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 08:55:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:55:24,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-27 08:55:24,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:55:24,132 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 13 treesize of output 9 [2023-08-27 08:55:24,179 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 08:55:24,210 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 08:55:24,501 INFO L322 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-08-27 08:55:24,502 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 79 treesize of output 48 [2023-08-27 08:55:24,539 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 08:55:24,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:55:27,163 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:55:27,163 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 814 treesize of output 466 [2023-08-27 08:55:27,590 INFO L322 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-08-27 08:55:27,591 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 2584 treesize of output 2419 [2023-08-27 08:55:28,249 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-27 08:55:28,250 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 412 treesize of output 544 [2023-08-27 08:56:09,428 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-27 08:56:09,429 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 581 treesize of output 533 [2023-08-27 08:56:13,514 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:56:18,384 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:56:19,736 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:56:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54312982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:31,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:31,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 28 [2023-08-27 08:56:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370535109] [2023-08-27 08:56:31,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:56:31,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:56:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=712, Unknown=2, NotChecked=0, Total=870 [2023-08-27 08:56:31,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 409 [2023-08-27 08:56:31,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 243 transitions, 2872 flow. Second operand has 30 states, 30 states have (on average 121.73333333333333) internal successors, (3652), 30 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:31,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:31,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 409 [2023-08-27 08:56:31,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:32,865 INFO L124 PetriNetUnfolderBase]: 1528/2751 cut-off events. [2023-08-27 08:56:32,865 INFO L125 PetriNetUnfolderBase]: For 15808/15863 co-relation queries the response was YES. [2023-08-27 08:56:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15431 conditions, 2751 events. 1528/2751 cut-off events. For 15808/15863 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16185 event pairs, 342 based on Foata normal form. 42/2781 useless extension candidates. Maximal degree in co-relation 15386. Up to 1853 conditions per place. [2023-08-27 08:56:32,888 INFO L140 encePairwiseOnDemand]: 403/409 looper letters, 280 selfloop transitions, 66 changer transitions 5/357 dead transitions. [2023-08-27 08:56:32,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 357 transitions, 4789 flow [2023-08-27 08:56:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:56:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:56:32,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1897 transitions. [2023-08-27 08:56:32,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30920945395273025 [2023-08-27 08:56:32,891 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1897 transitions. [2023-08-27 08:56:32,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1897 transitions. [2023-08-27 08:56:32,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:32,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1897 transitions. [2023-08-27 08:56:32,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.46666666666667) internal successors, (1897), 15 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:32,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 409.0) internal successors, (6544), 16 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:32,899 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 409.0) internal successors, (6544), 16 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:32,900 INFO L175 Difference]: Start difference. First operand has 141 places, 243 transitions, 2872 flow. Second operand 15 states and 1897 transitions. [2023-08-27 08:56:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 357 transitions, 4789 flow [2023-08-27 08:56:32,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 357 transitions, 4499 flow, removed 120 selfloop flow, removed 10 redundant places. [2023-08-27 08:56:32,961 INFO L231 Difference]: Finished difference. Result has 151 places, 284 transitions, 3568 flow [2023-08-27 08:56:32,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3568, PETRI_PLACES=151, PETRI_TRANSITIONS=284} [2023-08-27 08:56:32,962 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 128 predicate places. [2023-08-27 08:56:32,962 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 284 transitions, 3568 flow [2023-08-27 08:56:32,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 121.73333333333333) internal successors, (3652), 30 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:32,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:32,963 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 08:56:32,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-27 08:56:33,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 08:56:33,169 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 08:56:33,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2124189441, now seen corresponding path program 8 times [2023-08-27 08:56:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:33,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219216577] [2023-08-27 08:56:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:35,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:35,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219216577] [2023-08-27 08:56:35,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219216577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:35,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877675720] [2023-08-27 08:56:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:56:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:35,609 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 08:56:35,613 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 08:56:35,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:56:35,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:35,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-27 08:56:35,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:35,824 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 08:56:35,869 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 08:56:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:56:35,981 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 34 treesize of output 30 [2023-08-27 08:56:36,205 INFO L322 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2023-08-27 08:56:36,205 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 129 treesize of output 67 [2023-08-27 08:56:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:36,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:37,018 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:37,019 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 778 treesize of output 430 [2023-08-27 08:56:37,540 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:37,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 1600 treesize of output 1724 [2023-08-27 08:56:38,038 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:38,038 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 13 new quantified variables, introduced 28 case distinctions, treesize of input 684 treesize of output 840 [2023-08-27 08:56:38,628 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:38,629 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 669 treesize of output 617 [2023-08-27 08:57:18,332 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:57:19,879 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 09:04:18,189 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 09:04:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:04:18,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877675720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:04:18,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:04:18,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-08-27 09:04:18,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365184711] [2023-08-27 09:04:18,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:04:18,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 09:04:18,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:04:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 09:04:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=812, Unknown=1, NotChecked=0, Total=930 [2023-08-27 09:04:18,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 409 [2023-08-27 09:04:18,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 284 transitions, 3568 flow. Second operand has 31 states, 31 states have (on average 121.64516129032258) internal successors, (3771), 31 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:18,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:04:18,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 409 [2023-08-27 09:04:18,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:04:21,173 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 09:04:27,672 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:04:29,729 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 09:04:42,554 WARN L234 SmtUtils]: Spent 12.34s on a formula simplification. DAG size of input: 84 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:04:44,077 INFO L124 PetriNetUnfolderBase]: 2025/3645 cut-off events. [2023-08-27 09:04:44,077 INFO L125 PetriNetUnfolderBase]: For 25510/25602 co-relation queries the response was YES. [2023-08-27 09:04:44,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20960 conditions, 3645 events. 2025/3645 cut-off events. For 25510/25602 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22888 event pairs, 366 based on Foata normal form. 70/3702 useless extension candidates. Maximal degree in co-relation 20908. Up to 2407 conditions per place. [2023-08-27 09:04:44,106 INFO L140 encePairwiseOnDemand]: 402/409 looper letters, 275 selfloop transitions, 179 changer transitions 2/462 dead transitions. [2023-08-27 09:04:44,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 462 transitions, 6409 flow [2023-08-27 09:04:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 09:04:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 09:04:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3268 transitions. [2023-08-27 09:04:44,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3073161557269137 [2023-08-27 09:04:44,112 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3268 transitions. [2023-08-27 09:04:44,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3268 transitions. [2023-08-27 09:04:44,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:04:44,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3268 transitions. [2023-08-27 09:04:44,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 125.6923076923077) internal successors, (3268), 26 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:44,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 409.0) internal successors, (11043), 27 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:44,127 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 409.0) internal successors, (11043), 27 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:44,127 INFO L175 Difference]: Start difference. First operand has 151 places, 284 transitions, 3568 flow. Second operand 26 states and 3268 transitions. [2023-08-27 09:04:44,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 462 transitions, 6409 flow [2023-08-27 09:04:44,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 462 transitions, 6220 flow, removed 80 selfloop flow, removed 6 redundant places. [2023-08-27 09:04:44,226 INFO L231 Difference]: Finished difference. Result has 177 places, 383 transitions, 5405 flow [2023-08-27 09:04:44,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5405, PETRI_PLACES=177, PETRI_TRANSITIONS=383} [2023-08-27 09:04:44,226 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 154 predicate places. [2023-08-27 09:04:44,227 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 383 transitions, 5405 flow [2023-08-27 09:04:44,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 121.64516129032258) internal successors, (3771), 31 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:44,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:04:44,227 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 09:04:44,233 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 09:04:44,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 09:04:44,434 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 09:04:44,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:04:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash -185721963, now seen corresponding path program 9 times [2023-08-27 09:04:44,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:04:44,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969263619] [2023-08-27 09:04:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:04:44,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:04:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:04:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:04:46,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:04:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969263619] [2023-08-27 09:04:46,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969263619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:04:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101566993] [2023-08-27 09:04:46,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:04:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:04:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:04:46,541 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 09:04:46,543 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 09:04:46,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 09:04:46,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:04:46,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 09:04:46,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:04:46,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:04:46,871 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 09:04:46,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:04:46,998 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 09:04:47,022 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 09:04:47,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:04:47,179 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_508 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_508) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) 4) c_~f~0.offset)) (select .cse0 (+ (* (select .cse0 (+ (* (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4) c_~f~0.offset))))) is different from false [2023-08-27 09:04:47,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:04:47,363 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 132 treesize of output 372 [2023-08-27 09:04:47,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:04:47,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 43 treesize of output 192 [2023-08-27 09:04:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-08-27 09:04:50,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101566993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:04:50,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:04:50,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-27 09:04:50,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375066954] [2023-08-27 09:04:50,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:04:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 09:04:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:04:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 09:04:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=4, NotChecked=48, Total=702 [2023-08-27 09:04:50,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 409 [2023-08-27 09:04:50,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 383 transitions, 5405 flow. Second operand has 27 states, 27 states have (on average 121.70370370370371) internal successors, (3286), 27 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:50,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:04:50,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 409 [2023-08-27 09:04:50,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:04:54,248 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_508 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_508) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ (* (select .cse0 (+ (* (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4) c_~f~0.offset))))) (= c_~x1~0 c_~x2~0)) is different from false [2023-08-27 09:04:55,068 INFO L124 PetriNetUnfolderBase]: 2493/4476 cut-off events. [2023-08-27 09:04:55,068 INFO L125 PetriNetUnfolderBase]: For 39207/39290 co-relation queries the response was YES. [2023-08-27 09:04:55,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27645 conditions, 4476 events. 2493/4476 cut-off events. For 39207/39290 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29348 event pairs, 497 based on Foata normal form. 58/4519 useless extension candidates. Maximal degree in co-relation 27585. Up to 3166 conditions per place. [2023-08-27 09:04:55,106 INFO L140 encePairwiseOnDemand]: 400/409 looper letters, 314 selfloop transitions, 207 changer transitions 8/535 dead transitions. [2023-08-27 09:04:55,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 535 transitions, 8638 flow [2023-08-27 09:04:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 09:04:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 09:04:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2509 transitions. [2023-08-27 09:04:55,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3067237163814181 [2023-08-27 09:04:55,110 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2509 transitions. [2023-08-27 09:04:55,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2509 transitions. [2023-08-27 09:04:55,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:04:55,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2509 transitions. [2023-08-27 09:04:55,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 125.45) internal successors, (2509), 20 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:55,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 409.0) internal successors, (8589), 21 states have internal predecessors, (8589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:55,120 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 409.0) internal successors, (8589), 21 states have internal predecessors, (8589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:55,120 INFO L175 Difference]: Start difference. First operand has 177 places, 383 transitions, 5405 flow. Second operand 20 states and 2509 transitions. [2023-08-27 09:04:55,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 535 transitions, 8638 flow [2023-08-27 09:04:55,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 535 transitions, 8142 flow, removed 231 selfloop flow, removed 7 redundant places. [2023-08-27 09:04:55,321 INFO L231 Difference]: Finished difference. Result has 197 places, 479 transitions, 7480 flow [2023-08-27 09:04:55,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=5099, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7480, PETRI_PLACES=197, PETRI_TRANSITIONS=479} [2023-08-27 09:04:55,321 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 174 predicate places. [2023-08-27 09:04:55,321 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 479 transitions, 7480 flow [2023-08-27 09:04:55,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 121.70370370370371) internal successors, (3286), 27 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:55,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:04:55,322 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 09:04:55,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 09:04:55,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:04:55,523 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 09:04:55,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:04:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1037997981, now seen corresponding path program 10 times [2023-08-27 09:04:55,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:04:55,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213079890] [2023-08-27 09:04:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:04:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:04:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:04:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:04:57,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:04:57,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213079890] [2023-08-27 09:04:57,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213079890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:04:57,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93689690] [2023-08-27 09:04:57,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 09:04:57,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:04:57,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:04:57,420 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 09:04:57,421 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 09:04:57,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 09:04:57,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:04:57,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 09:04:57,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:04:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:04:57,658 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 09:04:57,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:04:57,772 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 09:04:57,804 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 09:04:57,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:05:00,195 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:00,195 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 132 treesize of output 372 [2023-08-27 09:05:00,296 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:00,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 43 treesize of output 192 [2023-08-27 09:05:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:05:03,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93689690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:05:03,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:05:03,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-27 09:05:03,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581529180] [2023-08-27 09:05:03,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:05:03,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 09:05:03,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:05:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 09:05:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=614, Unknown=11, NotChecked=0, Total=702 [2023-08-27 09:05:03,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 409 [2023-08-27 09:05:03,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 479 transitions, 7480 flow. Second operand has 27 states, 27 states have (on average 121.55555555555556) internal successors, (3282), 27 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:03,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:05:03,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 409 [2023-08-27 09:05:03,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:05:10,448 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 09:05:11,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 09:05:16,421 WARN L539 Checker$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 09:05:19,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 09:05:21,691 WARN L539 Checker$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 09:05:21,919 INFO L124 PetriNetUnfolderBase]: 2841/5115 cut-off events. [2023-08-27 09:05:21,919 INFO L125 PetriNetUnfolderBase]: For 57659/57731 co-relation queries the response was YES. [2023-08-27 09:05:21,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36982 conditions, 5115 events. 2841/5115 cut-off events. For 57659/57731 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34730 event pairs, 605 based on Foata normal form. 63/5170 useless extension candidates. Maximal degree in co-relation 36914. Up to 3957 conditions per place. [2023-08-27 09:05:21,968 INFO L140 encePairwiseOnDemand]: 403/409 looper letters, 428 selfloop transitions, 188 changer transitions 2/624 dead transitions. [2023-08-27 09:05:21,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 624 transitions, 10703 flow [2023-08-27 09:05:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 09:05:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 09:05:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3017 transitions. [2023-08-27 09:05:21,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3073553382233089 [2023-08-27 09:05:21,972 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3017 transitions. [2023-08-27 09:05:21,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3017 transitions. [2023-08-27 09:05:21,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:05:21,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3017 transitions. [2023-08-27 09:05:21,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 125.70833333333333) internal successors, (3017), 24 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:21,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:21,984 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:21,984 INFO L175 Difference]: Start difference. First operand has 197 places, 479 transitions, 7480 flow. Second operand 24 states and 3017 transitions. [2023-08-27 09:05:21,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 624 transitions, 10703 flow [2023-08-27 09:05:22,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 624 transitions, 9961 flow, removed 313 selfloop flow, removed 10 redundant places. [2023-08-27 09:05:22,241 INFO L231 Difference]: Finished difference. Result has 219 places, 542 transitions, 8697 flow [2023-08-27 09:05:22,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8697, PETRI_PLACES=219, PETRI_TRANSITIONS=542} [2023-08-27 09:05:22,242 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 196 predicate places. [2023-08-27 09:05:22,242 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 542 transitions, 8697 flow [2023-08-27 09:05:22,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 121.55555555555556) internal successors, (3282), 27 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:22,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:05:22,243 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 09:05:22,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-27 09:05:22,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-27 09:05:22,449 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 09:05:22,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:05:22,449 INFO L85 PathProgramCache]: Analyzing trace with hash -443846953, now seen corresponding path program 11 times [2023-08-27 09:05:22,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:05:22,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341196588] [2023-08-27 09:05:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:05:22,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:05:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:05:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:05:24,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:05:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341196588] [2023-08-27 09:05:24,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341196588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:05:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964199681] [2023-08-27 09:05:24,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:05:24,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:05:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:05:24,054 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 09:05:24,058 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 09:05:24,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 09:05:24,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:05:24,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 09:05:24,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:05:24,262 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 09:05:24,299 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 09:05:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:05:24,405 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 09:05:24,730 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:05:24,825 INFO L322 Elim1Store]: treesize reduction 203, result has 12.5 percent of original size [2023-08-27 09:05:24,825 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 93 treesize of output 77 [2023-08-27 09:05:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:05:24,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:05:27,674 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:27,675 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 423 treesize of output 243 [2023-08-27 09:05:28,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:28,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 1108 treesize of output 1478 [2023-08-27 09:05:29,178 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:29,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 440 treesize of output 844 [2023-08-27 09:05:29,711 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:29,712 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 477 treesize of output 587 Received shutdown request... [2023-08-27 09:07:49,574 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2023-08-27 09:07:49,589 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 09:07:49,608 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 09:07:49,609 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 09:07:49,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:07:49,781 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-8-2-4-2-9-2-8-2-8-2-7-2-5-3-7-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-66-9-4-9-7-9-3-8-3-8-3-8-2-10-3-10-2-8-2-7-3-6-3-6-3-9-2-1 context. [2023-08-27 09:07:49,783 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2023-08-27 09:07:49,783 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2023-08-27 09:07:49,783 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-27 09:07:49,783 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-27 09:07:49,783 INFO L445 BasicCegarLoop]: Path program histogram: [11, 3, 2, 1, 1, 1, 1, 1] [2023-08-27 09:07:49,786 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 09:07:49,786 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 09:07:49,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:07:49 BasicIcfg [2023-08-27 09:07:49,788 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 09:07:49,788 INFO L158 Benchmark]: Toolchain (without parser) took 811915.52ms. Allocated memory was 427.8MB in the beginning and 1.3GB in the end (delta: 853.5MB). Free memory was 403.3MB in the beginning and 538.2MB in the end (delta: -134.9MB). Peak memory consumption was 810.9MB. Max. memory is 16.0GB. [2023-08-27 09:07:49,789 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 427.8MB. Free memory was 405.6MB in the beginning and 405.4MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 09:07:49,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.52ms. Allocated memory is still 427.8MB. Free memory was 403.3MB in the beginning and 392.1MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 09:07:49,789 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.29ms. Allocated memory is still 427.8MB. Free memory was 392.1MB in the beginning and 390.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:07:49,790 INFO L158 Benchmark]: Boogie Preprocessor took 23.71ms. Allocated memory is still 427.8MB. Free memory was 390.0MB in the beginning and 387.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:07:49,790 INFO L158 Benchmark]: RCFGBuilder took 478.11ms. Allocated memory is still 427.8MB. Free memory was 387.9MB in the beginning and 370.3MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-27 09:07:49,790 INFO L158 Benchmark]: TraceAbstraction took 811075.53ms. Allocated memory was 427.8MB in the beginning and 1.3GB in the end (delta: 853.5MB). Free memory was 369.8MB in the beginning and 538.2MB in the end (delta: -168.4MB). Peak memory consumption was 777.4MB. Max. memory is 16.0GB. [2023-08-27 09:07:49,791 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 427.8MB. Free memory was 405.6MB in the beginning and 405.4MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 282.52ms. Allocated memory is still 427.8MB. Free memory was 403.3MB in the beginning and 392.1MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.29ms. Allocated memory is still 427.8MB. Free memory was 392.1MB in the beginning and 390.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.71ms. Allocated memory is still 427.8MB. Free memory was 390.0MB in the beginning and 387.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 478.11ms. Allocated memory is still 427.8MB. Free memory was 387.9MB in the beginning and 370.3MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 811075.53ms. Allocated memory was 427.8MB in the beginning and 1.3GB in the end (delta: 853.5MB). Free memory was 369.8MB in the beginning and 538.2MB in the end (delta: -168.4MB). Peak memory consumption was 777.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 169 PlacesBefore, 23 PlacesAfterwards, 178 TransitionsBefore, 19 TransitionsAfterwards, 3242 CoEnabledTransitionPairs, 8 FixpointIterations, 85 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 22 TrivialYvCompositions, 26 ConcurrentYvCompositions, 13 ChoiceCompositions, 220 TotalNumberOfCompositions, 3260 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3194, independent: 3185, independent conditional: 0, independent unconditional: 3185, 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: 1914, independent: 1910, independent conditional: 0, independent unconditional: 1910, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3194, independent: 1275, independent conditional: 0, independent unconditional: 1275, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 1914, unknown conditional: 0, unknown unconditional: 1914] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, 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 analyzing trace of length 22 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-8-2-4-2-9-2-8-2-8-2-7-2-5-3-7-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-66-9-4-9-7-9-3-8-3-8-3-8-2-10-3-10-2-8-2-7-3-6-3-6-3-9-2-1 context. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-8-2-4-2-9-2-8-2-8-2-7-2-5-3-7-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-66-9-4-9-7-9-3-8-3-8-3-8-2-10-3-10-2-8-2-7-3-6-3-6-3-9-2-1 context. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-8-2-4-2-9-2-8-2-8-2-7-2-5-3-7-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-66-9-4-9-7-9-3-8-3-8-3-8-2-10-3-10-2-8-2-7-3-6-3-6-3-9-2-1 context. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-8-2-4-2-9-2-8-2-8-2-7-2-5-3-7-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-66-9-4-9-7-9-3-8-3-8-3-8-2-10-3-10-2-8-2-7-3-6-3-6-3-9-2-1 context. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-8-2-4-2-9-2-8-2-8-2-7-2-5-3-7-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-66-9-4-9-7-9-3-8-3-8-3-8-2-10-3-10-2-8-2-7-3-6-3-6-3-9-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 246 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: 810.9s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 72.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.2s, HoareTripleCheckerStatistics: 176 mSolverCounterUnknown, 1196 SdHoareTripleChecker+Valid, 22.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1196 mSDsluCounter, 45 SdHoareTripleChecker+Invalid, 21.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 228 IncrementalHoareTripleChecker+Unchecked, 33 mSDsCounter, 218 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7498 IncrementalHoareTripleChecker+Invalid, 8120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 218 mSolverCounterUnsat, 12 mSDtfsCounter, 7498 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 656 GetRequests, 302 SyntacticMatches, 6 SemanticMatches, 348 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 54.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8697occurred in iteration=20, InterpolantAutomatonStates: 249, 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: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 580.7s InterpolantComputationTime, 537 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 699 ConstructedInterpolants, 24 QuantifiedInterpolants, 21307 SizeOfPredicates, 128 NumberOfNonLiveVariables, 2548 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 44 InterpolantComputations, 9 PerfectInterpolantSequences, 64/388 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